JPH0536779B2

JPH0536779B2 -

Info

Publication number: JPH0536779B2
Application number: JP58030883A
Authority: JP
Inventors: Fumio Ishii; Takashi Sasaki; Shinichi Daiba
Original assignee: Konica Minolta Inc
Current assignee: Konica Minolta Inc
Priority date: 1983-02-28
Filing date: 1983-02-28
Publication date: 1993-05-31
Also published as: JPS59182785A

Description

[Detailed description of the invention]

［産業上の利用分野］本発明は熱現像拡散転写写真用受像要素及び感
熱昇華転写材料用受像要素に関し、詳しくは、色
素の熱拡散転写を伴う熱現像カラー感光要素と組
合せて用いられる熱現像拡散転写写真用受像要
素、又はサーマルヘツド等の熱源を用いるカラー
感熱要素と組合せて用いられる感熱昇華転写材料
用受像要素に関するものであり、形成されたカラ
ー色素画像を光や熱に対して堅牢に保持すること
ができる熱現像拡散転写写真用受像要素及び感熱
昇華転写材料用受像要素に関する。［従来技術］カラー画像を得るための現像工程を乾式熱処理
によつて行なう方法は、従来の湿式法に比べ処理
時間、公害に対する懸念及びコスト等に関して有
利な点を多く有している。乾式熱処理による方法
は大きく分けて２つのタイプがあり、１つは熱現
像写真材料を用いる技術であり、他の１つは感熱
転写材料を用いる技術である。熱現像写真材料の基本構成は、感光要素と受像
要素とから構成され、感光要素は基本的には有機
銀塩、現像剤（還元剤）、熱転写性色素供与物質
（色素プレカーサーを含む）、必要に応じて感光性
ハロゲン化銀、バインダー、添加剤を含有する感
光層その他の写真構成層を支持体上に塗設してな
り、受像要素は前記感光要素に含まれる熱転写性
色素供与物質から熱現像によつて放出乃至形成さ
れる熱転写性色素の熱拡散転写によつて色素画像
を形成できる受像層を有してなり、また必要に応
じて受像要素は支持体を有してなる。一方、感熱転写材料の基本的構成は、感熱要素
と受像要素とから構成され、感熱要素は、基本的
には、昇華性、気化性もしくは溶融移行性又は溶
媒移行性（本明細書において、単に昇華乃至昇華
性という）の熱転写性色素供与物質を含有する感
熱インク層その他の構成層を支持体上に塗設して
なり、受像要素は前記感熱要素に含まれる熱転写
性色素供与物質から加熱によつて放出乃至形成さ
れる熱転写性色素の熱拡散転写によつて色素画像
を形成できる受像層を有してなり、また必要に応
じて受像要素は支持体を有してなる。これらの熱拡散転写法による熱転写材料におけ
る熱転写要素（上記感光要素と感熱要素を含む。
以下同じ）と受像要素との関係は、熱転写の際に
少なくとも積重の関係にあればよく、予じめ一体
型に構成される場合と、熱転写時に積重の関係に
おかれる構成の場合とがあり、また、熱転写後に
は両要素が剥離される形式のものと、一体型の形
式のものとがあり、それぞれ用途に応じて使いわ
けられている。以上述べたような、熱拡散を利用して受像要素
にカラー色素画像を得る技術においては、画像を
形成する色素が保存中とくに光に晒された場合、
受像要素中に通常存在している微量の重金属や酸
素と極めて反応しやすい雰囲気下に置かれてい
る。そのため所期の色素が酸化されたり、別の化
合物に変わつてしまい、色汚染を引き起こした
り、濃度が低下するという重大な欠点があつた。［発明の目的］本発明者は上記欠点を解消するため鋭意研究の
結果、改良された熱現像拡散転写写真用受像要素
及び感熱昇華転写材料用受像要素を見い出した。本発明の目的は、カラー熱拡散転写方式におい
て形成された色素画像を光照射下で安定に存在さ
せるための熱現像拡散転写写真用受像要素及び感
熱昇華転写材料用受像要素を提供することにあ
る。［発明の構成］本発明の上記目的を達成する熱現像拡散転写写
真用受像要素は、熱転写性色素供与物質を含有す
ると共に、加熱下で色素を熱拡散する熱現像カラ
ー感光要素に対し、少なくとも熱転写の際に積重
の関係におかれる受像要素において、該受像要素
が下記一般式（），（）または（）で示され
る化合物の少なくとも１つを含有することを特徴
とする。また、上記目的を達成する感熱昇華転写材料用
受像要素は、熱転写性色素供与物質を含有する共
に、加熱下で色素を昇華転写するカラー感熱要素
に対し、少なくとも熱転写の際に積重の関係にお
かれる受像要素において、該受像要素が下記一般
式（），（）または（）で示される化合物の
少なくとも１つを含有することを特徴とする。一般式（）一般式（）一般式（）〔式中、R1，R1′，R3，R3′，およびR5は各々
水素原子、脂肪族基、芳香族基、ヘテロ環基、ア
シル基もしくはスルホニル基を表わし、R2，
R4，R4′，R6およびR7は各々水素原子、ハロゲ
ン原子または一価の有機基を表わし、及びｑは
各々１〜４の整数を表わし、ｍ，ｎ及びｐは各々
１〜３の整数を表わす。また，ｍ，ｎ，ｐ及び
ｑが各々２以上の場合には、R2，R4，R4′，R6
およびR7は各々同一でも異なつていてもよい。〕さらに具体的に説明すると、前記R1，R1′，
R3，R3′，及びR5の表わす脂肪族基としては、
アルキル基、アルケニル基、シクロアルキル基等
が挙げられ、該アルキル基としては炭素数１〜20
の直鎖または分岐を有するもの、該アルケニル基
としては炭素数２〜20の直鎖または分岐を有する
もの、さらに該シクロアルキル基としては５〜７
員のものが好ましい。また前記のR1，R1′，R3，R3′，及びR5の表わ
す芳香族基としては、フエニル基、ナフチル基等
が挙げられ、また上記R1等５者の表わす複素環
基としては、５〜６員の窒素原子、酸素原子また
は硫黄原子を含有するものであり、例えば、フリ
ル、ビラニル、テトラヒドロピラニル、イミダゾ
リル、ピロリル、ピリミジル、ピラジニル、トリ
アジニル、チエニル、キノニル、オキサゾリルま
たはピリジル等が挙げられる。また前記R1，R1′，R3，R3′及びR5の表わすア
シル基としては、炭素数１〜20のアルキルカルボ
ニル基、アリールカルボニル基であつて、例えば
アセチル、ピバロイル、オレイル、ラウロイル、
ベンゾイル等である。また前記R1等５者の表わ
すスルホニル基としては、炭素数１〜20のアルキ
ルスルホニル基、アリールスルホニル基であり、
例えばメタンスルホニル、ブタンスルホニル、ベ
ンゼンスルホニル或はトルエンスルホニル等が挙
げられる。次に前記のR2，R4，R4′，R6及びR7で表わさ
れる一価の有機基とは、一般式（），（）また
は（）のベンゼン環に置換可能な基を意味し、
例えば炭素数１〜20のアルキル基、アルキルオキ
シ基、アルキルチオ基、フエニル基、フエノキシ
基、アシル基、アシルアミノ基、スルホンアミド
基、アルキルアミノ基或はアルコキシカルボニル
基等を表わす。次に本発明に使用される前記一般式（），
（）または（）で示される化合物（以下、本
発明の化合物という。）の具体例を例示するが、
これらに限定されるものではない。〔本発明の化合物例〕（）−１（）−２（）−３（）−４（）−５（）−６（）−７（）−１（）−２（）−３（）−４（）−５（）−１（）−２（）−３（）−４（）−５（）−６（）−７（）−８（）−９これら本発明の化合物は、例えば特公昭45−
14034号、同49−8338号、同49−20977号、特開昭
52−35633号、同52−147434号、同53−17729号、
同53−20327号、54−48538号、同55−89836、同
47−4738号及び同54−44521号各公報等に記載の
方法により合成することができる。本発明の化合物は単独で用いてもよいし、２種
以上を併用してもよい。本発明の化合物の使用量は限定的ではないが、
最大濃度の画像色素１モルに対し10〜1000モル
％、好ましくは10〜100モル％用いるのがよい。本発明の化合物を受像要素に含有させる方法は
特に問わないが、〔Ａ〕受像要素を形成する支持
体上に塗設あるいは浸漬する方法、または熱転写
要素と兼用の支持体、もしくは熱転写要素と一体
型の受像要素にあつては該熱転写要素の表面に受
像層として塗設あるいは浸漬する方法があり、あ
るいは〔Ｂ〕支持体を形成させる場合に本発明の
化合物をあらかじめ添加しておく方法などがあ
る。前者〔Ａ〕の場合、本発明の化合物を適当な
有機溶媒（例えばアセトン、メタノール、エタノ
ール、酢酸エチル、ジメチルホルムアミド、ジブ
チルフタレート、トリクレジルホスフエート等）
に溶解させた溶液中に、前記受像要素を浸漬、ま
たはこれら溶液を前記支持体もしくは受像層に塗
布することによつて添加することができる。ある
いは前記受像層を製造する際に無溶媒あるいは適
当な有機溶媒を用いて分散することにより、添加
することができる。一方、後者〔Ｂ〕の場合、天
然あるいは合成パルプに紙力増強剤、サイズ剤、
填料などと共に本発明の化合物を加えた混合液
（スラリー）を抄紙機で抄紙する方法や、合成ポ
リマーのドープに本発明の化合物を加えておいて
フイルム状に形成させて本発明の受像要素とする
方法などがある。本発明で用いることのできる受像要素として
は、紙、合成高分子（フイルム）が挙げられる。
合成高分子（フイルム）としては、例えばポリア
クリレート類（例えばポリアクリル酸メチル、ポ
リアクリル酸エチル）、ポリアクリロニトリル、
アクリロニトリル−スチレン共重合物、アクリロ
ニトリル−ブタジエン−スチレン共重合物、ポリ
アセタール、塩化ポリエーテル、ポリ塩化ビニリ
デン、ポリ塩化ビニル、ポリビニルカルバゾー
ル、ポリスチレン、スチレン−ブタジエン共重合
物、ポリ酢酸セルロース類、ポリアセタール類
（例えばポリビニルブチラール、ポリビニルホル
マール）、ポリテトラフルオロエチレン、ポリク
ロロトリフルオロエチレン、ポリエチレン、塩素
化ポリエチレン、ポリカーボネート、ポリ酢酸ビ
ニル、ポリビニルアルコール、ポリプロピレン、
ポリビニルピロリドン、ポリアクリレート類（例
えばポリメチルメタクリレート、ポリエチルメタ
クリレート、ポリプロピルメタクリレート、ポリ
イソプロピルメタクリレート、ポリ−ｔ−ブチル
メクタリレート、ポリシクロヘキシルメタクリレ
ート、ポリエチレングリコールジメタクリレー
ト、ポリ−２−シアノ−エチルジメタクリレート
等）、ポリエステル類（例えばポリエチレンテレ
フタレート等）、ポリアミド、ポリイミド、ポリ
スルホン等がある。これらの合成高分子は単独で
も混合物でもよく、また共重合体としてもよい。特に好ましい受像要素としては、ポリ塩化ビニ
リデン、ポリ塩化ビニル、ポリカーボネート、ポ
リエチレンテレフタレート、トリアセテート、ジ
アセテート等のポリ酢酸セルロース類、ヘプタメ
チレンジアミンとテレフタル酸、フルオレンジプ
ロピルアミンとアジピン酸、ヘキサメチレンジア
ミンとジフエン酸、ヘキサメチレンジアミンとイ
ソフタル酸とから合成されるポリアミド類、ジエ
チレングリコールとジフエニルカルボン酸、エチ
レングリコールとビス−ｐ−カルボキシフエノキ
シブタンとから合成されるポリエステルが挙げら
れる。また本発明の受像要素は、例えば特願昭57−
122596号、同57−205447号、特開昭57−186744
号、同57−179840号、同57−198458号、同57−
207250号、特願昭57−229649号、同57−229650
号、同57−229675号に示されるような熱現像写真
材料あるいは熱拡散転写方法の受像要素に適用す
ることができる。すなわち光情報を与えた後、熱
現像することによつて放出乃至形成された熱拡散
性の色素は、本発明の受像要素に転写されるもの
である。熱現像要素および熱現像写真材料に関す
る一般技術は公知であり、本発明においてはこれ
らのいずれの形式の熱現像要素と組合せて用いら
れてもよい。また、本発明の受像要素は、特願昭57−217063
号、同57−217796号、同57−217797号、同57−
229651号や特開昭51−15446号、同54−68253号、
同57−160691号等に記載の如き、感熱転写記録媒
体または感熱転写記録方法にも用いる感熱転写用
の受像要素として用いることができる。すなわ
ち、例えば感熱転写用インクシートと本発明の受
像要素を重ね合わせ、サーマルヘツド、レーザ
ー、キセノンランプなどによる熱情報に応じて、
本発明の受像要素上へ転写された色素が、該受像
要素に含有される本発明の化合物と接触、混合も
しくは溶解されて、好ましい色調を示すものであ
る。感熱要素に関する一般技術は公知であり、本
発明の受像要素はこれら感熱要素のいずれの形式
のものと組合せて用いられてもよい。本発明において熱転写とは、熱によつて色素が
昇華（固体から液体を経ずに気化するものに限ら
ず、溶融を伴つて気化するものを含む。）、溶融ま
たは溶媒によつて拡散し、転写されることを言
う。なおまた、本発明の受像要素を感熱転写材料用
とする場合、(1)、印刷抵抗、薄膜抵抗、半導体抵
抗等で構成されたサーマルヘツド若しくはレーザ
ー、キセノンランプ等の熱源により感熱要素を発
色させ画像等を記録する方法の他、(2)、別の系統
からの画像情報に応じて制御されている熱源によ
り受像要素に画像等を得る方法として、熱源によ
り感熱要素から受像要素に色素を転写させる感熱
転写方式にも適用できることは勿論である。本発明の受像要素には各種の添加剤を添加でき
る。例えばマツト性、白地性、スベリ性、光沢性
を付与するために、チタンホワイト、シリカ、タ
ルク、クレー、滑石、硫酸バリウム、炭酸カルシ
ウム、ガラス粉、カオリン、酸化亜鉛などの無機
添加剤が加えられてもよい。また画像の堅牢性を
向上させる目的やその他の目的で紫外線吸収剤、
酸化防止剤、消光物質などを含んでもよい。本発明の受像要素は、熱転写性色素供与物質か
ら生じた色素の転写が可能なものであつて、本発
明の受像要素は、少なくとも熱拡散転写の際に熱
転写要素と積重の関係におかれるものであり、熱
転写性色素供与物質を含有する熱転写要素であれ
ば、いずれの型のものとでも組合せて用いること
ができ、この熱転写要素に対しては所謂一体型で
あつてもよいし、所謂剥離型であつてもよい。こ
こに用いられる色素としては、アゾ色素、アント
ラキノン色素、アゾメチン色素、インドアニリン
色素、ナフトキノン色素、ニトロ色素、スチリル
色素、フタロシアニン色素、キノフタロントリフ
エニルメタン色素、シアニン色素など、いずれで
あつてもよいが、アゾメチン色素、インドアニリ
ン色素においてその効果が顕著である。アゾメチン色素とは、分子中に、下記のＣ＝Ｎ− 結合の発色団を有するものであり、一般的に
は、活性メチレン基を有する化合物と芳香族一級
アミンとによつて形成される。特に、開鎖活性メチレン化合物とｐ−フエニレ
ンジアミン誘導体の酸化カツプリング反応物はイ
エロー色素となり、１−フエニル−５−ピラゾロ
ン誘導体の反応物はマゼンタ色素となるものであ
る。インドアニリン色素とは、Ｎ−（ｐ−アミノフ
エニル）−ｐ−キノンイミンおよびその誘導体を
さし、通常、ｐ−ニトロソフエノールまたはキノ
ンクロルイミンとジアルキルアニリンとの縮合反
応によつて、あるいはアルカリ溶液中で還元剤の
存在下にニトロソまたはニトロジアルキルアニリ
ンとフエノールまたはナフトールの反応によつ
て、さらにはまたｐ−フエニレンジアミン誘導体
とフエノールまたはナフトールの混合物を酸化カ
ツプリングする反応などによつて合成されるもの
である。熱現像または感熱転写に際し、熱転写性色素を
供与（放出乃至形成）する熱転写性色素供与物質
は、各種のタイプのものが知られている［例えば
特願昭58−31288号］が、本発明の受像要素と組
合せられる熱転写要素は、いずれのタイプの熱転
写性色素供与物質を含有するものであつてもよ
い。例えば米国特許3531286号、同3761270号、同
3764328号、Research Disclosure No.15108、同
No.15127、同No.12044および同No.16479等には熱現
像写真材料中に写真用カプラーと発色現像主薬を
含有させたものについて、米国特許第3180731号、
Research Disclosure No.13443および同No.14347
等にはロイコ色素を用いたものについて、米国特
許第4235957号、Research Disclosure No.
14433、同No.14448、同No.15227、同No.15776、同No.
18137および同No.19419等には、銀色素漂白法を応
用したものについて、並びに米国特許第4124398
号、同4124387号および同4123273号には熱現像感
光材料の熱漂白方法について各々述べられてお
り、本発明はこれらのいずれにも適用できる。本発明の受像要素と組合される熱転写要素が、
熱現像感光要素である場合、従来公知の構成に限
らず、例えば現像剤（還元剤）を該感光要素中に
実質的に添加せず、本発明の受像要素中に含有せ
しめてもよい。また、これら感光要素は、有機銀
塩、現像剤（還元剤）、色素供与物質、バインダ
ー、ハロゲン化銀、添加剤（色調調整剤、現像調
整剤、化学増感剤、物理（分光）増感剤、カブリ
防止剤、フイルター染料、アンチハレーシヨン染
料、色素放出助剤等）を含有する感光層の他、中
間層、保護層、下引層あるいはバリヤー層等の写
真構成層を有していてもよい。また、本発明を熱
現像写真材料に適用する場合、反射性層を有して
いてもよい。一方、本発明の受像要素と組合される熱転写要
素が感熱要素である場合も、該感熱要素は各種添
加剤を含有していてもよい。本発明の受像要素は、既述の如く、熱転写要素
上に塗設された、または積重される受像層のみか
らなる場合もあれば、受像層および支持体を有す
る受像要素の構成の場合もある。〔実施例〕以下に本発明の好ましい実施例を示すが、本発
明はこの実施例に限定されるものではない。実施例１熱現像写真材料を次のようにして作つた。４−スルホベンゾトリアゾール銀9.20gに水溶
性ポリビニルブチラール25％水溶液（積水化学
製、エスレツクＷ−201）24ml、水116ml、メタノ
ール70mlを加え、アルミナボールミルにて粉砕分
散し、銀塩分散液を得た。この銀塩分散液25mlにフタル酸0.21g、フタラ
ジン0.16g、下記熱転写性色素供与物質(A)0.93g、
下記現像剤(B)0.57g、および水溶性ポリビニルブ
チラール25％水溶液５ml、水10ml、さらに平均粒
径0.04μのヨウ化銀ゼラチン乳剤を銀に換算して
36mg添加し、写真用バライタ紙上に、湿潤膜厚が
55μとなるようにワイヤーバーにて塗布して感光
層を設けて感光要素を得た。熱転写性色素供与物質(A) 現像剤(B) 乾燥して得られた感光要素に対し、ステツプウ
エツジを通して30000CMSの露光を与えた。一方、受像要素は、まずアイボリー紙上に、二
酢酸セルロース（アセチル化度約60％）を
1.40g／m²塗布し、乾燥して受像層を得た。次い
で、下記第１表に示した本発明の化合物を用い、
これら化合物の各々10gを、それぞれジブチルフ
タレート５mlと酢酸エチル200mlとの混合液に加
え、60℃に加温して完全に溶解させ、そしてこの
本発明の化合物を含む溶液に上記二酢酸セルロー
スの受像層を塗設した受像要素を浸し、本発明の
化合物を受像要素に含浸させ、乾燥して本発明の
受像要素を作成した。前記露光済の感光要素の感光層面と前記受像要
素の受像層面を密着し、表面温度が150℃のアイ
ロンで30秒間圧着加熱した後、両要素をひきはが
した。受像層には最大反射濃度0.60、最小反射濃
度0.08の橙色のステツプウエツジのネガ像が得ら
れた。上記により処理して得られた受像要素につい
て、それぞれ耐光性の試験を行なつた。なお表
中、耐光性は得られた各画像を6000Wのキセノン
ランプで48時間照射し（画像面上の照度は6000ル
ツクス）、照射後における初期濃度0.5での残存率
を百分率で表わした。同表からも明らかなように、本発明の化合物を
含んだ受像要素は耐光性に優れていることがわか
る。 [Field of Industrial Application] The present invention relates to an image-receiving element for heat-developable diffusion transfer photography and an image-receiving element for heat-sensitive sublimation transfer materials, and more particularly, to a heat-developable color photosensitive element used in combination with a heat-developable color photosensitive element that involves thermal diffusion transfer of dyes. This relates to an image receiving element for a heat-sensitive sublimation transfer material that is used in combination with an image-receiving element for diffusion transfer photography or a color heat-sensitive element that uses a heat source such as a thermal head, and makes the formed color dye image robust against light and heat. The present invention relates to an image-receiving element for heat-developable diffusion transfer photography and an image-receiving element for heat-sensitive sublimation transfer material that can be retained. [Prior Art] A method in which the developing step for obtaining a color image is performed by dry heat treatment has many advantages over the conventional wet method in terms of processing time, concerns about pollution, cost, and the like. Dry heat treatment methods can be roughly divided into two types: one is a technique that uses a heat-developable photographic material, and the other is a technique that uses a heat-sensitive transfer material. The basic structure of a heat-developable photographic material consists of a photosensitive element and an image-receiving element. A photosensitive layer containing a photosensitive silver halide, a binder, and additives and other photographic constituent layers are coated on a support according to the photosensitive element, and the image receiving element is formed by transferring heat from the heat transferable dye-providing substance contained in the photosensitive element. The image-receiving element has an image-receiving layer capable of forming a dye image by thermal diffusion transfer of a heat-transferable dye released or formed by development, and if necessary, the image-receiving element has a support. On the other hand, the basic structure of a heat-sensitive transfer material is composed of a heat-sensitive element and an image-receiving element, and the heat-sensitive element basically has sublimation property, vaporization property, melt migration property, or solvent migration property (herein, simply referred to as A heat-sensitive ink layer and other constituent layers containing a heat-transferable dye-providing substance (referred to as sublimation or sublimation property) are coated on a support, and the image-receiving element is formed by applying heat to the heat-transferable dye-providing substance contained in the heat-sensitive element. The image-receiving element has an image-receiving layer capable of forming a dye image by thermal diffusion transfer of the heat-transferable dye thus released or formed, and if necessary, the image-receiving element has a support. Thermal transfer elements (including the above-mentioned photosensitive elements and heat-sensitive elements) in thermal transfer materials produced by these thermal diffusion transfer methods.
The relationship between the image-receiving element (hereinafter the same) should be at least a stacked relationship during thermal transfer, and there are two cases: an integrated structure in advance, and a stacked structure during thermal transfer. There are also types in which both elements are peeled off after thermal transfer, and types in which both elements are peeled off, and types in which they are integrated, and each type is used depending on the purpose. In the technique described above that uses thermal diffusion to obtain a color dye image on an image-receiving element, when the dye forming the image is exposed to light during storage,
It is placed in an atmosphere that is highly reactive with trace amounts of heavy metals and oxygen that are normally present in the image receiving element. As a result, the intended dye may be oxidized or converted into another compound, resulting in serious drawbacks such as color staining and a decrease in density. [Object of the Invention] As a result of intensive research to eliminate the above-mentioned drawbacks, the present inventors have discovered an improved image receiving element for heat development diffusion transfer photography and an improved image receiving element for heat sensitive sublimation transfer materials. An object of the present invention is to provide an image-receiving element for heat-developable diffusion transfer photography and an image-receiving element for heat-sensitive sublimation transfer material, which allow a dye image formed in a color thermal diffusion transfer method to exist stably under light irradiation. . [Structure of the Invention] A heat-developable diffusion transfer photographic image-receiving element that achieves the above-mentioned objects of the present invention contains a heat-transferable dye-providing substance and has at least the following characteristics compared to a heat-developable color photosensitive element that thermally diffuses a dye under heating. An image receiving element placed in a stacked relationship during thermal transfer is characterized in that the image receiving element contains at least one compound represented by the following general formula (), () or (). Furthermore, an image receiving element for a heat-sensitive sublimation transfer material that achieves the above object contains a heat-transferable dye-providing substance and is at least in a stacking relationship during thermal transfer, as opposed to a color heat-sensitive element that sublimates and transfers a dye under heating. The image receiving element is characterized in that it contains at least one compound represented by the following general formula (), () or (). General formula () General formula () General formula () [In the formula, R1, R1', R3, R3', and R5 each represent a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, an acyl group, or a sulfonyl group, and R2,
R4, R4', R6 and R7 each represent a hydrogen atom, a halogen atom or a monovalent organic group, q each represents an integer of 1 to 4, and m, n and p each represent an integer of 1 to 3. . In addition, when m, n, p and q are each 2 or more, R2, R4, R4', R6
and R7 may be the same or different. ] To explain more specifically, the above R1, R1′,
The aliphatic groups represented by R3, R3', and R5 are:
Examples include an alkyl group, an alkenyl group, a cycloalkyl group, and the alkyl group has 1 to 20 carbon atoms.
The alkenyl group has 2 to 20 carbon atoms, and the cycloalkyl group has 5 to 7 carbon atoms.
Preferably a member of the public. Further, the aromatic groups represented by R1, R1', R3, R3', and R5 include phenyl groups, naphthyl groups, etc., and the heterocyclic groups represented by the five groups such as R1 include 5 to 6 Examples include furyl, vilanyl, tetrahydropyranyl, imidazolyl, pyrrolyl, pyrimidyl, pyrazinyl, triazinyl, thienyl, quinonyl, oxazolyl, and pyridyl. The acyl groups represented by R1, R1', R3, R3' and R5 include alkylcarbonyl groups and arylcarbonyl groups having 1 to 20 carbon atoms, such as acetyl, pivaloyl, oleyl, lauroyl,
benzoyl etc. In addition, the sulfonyl group represented by the five members such as R1 is an alkylsulfonyl group having 1 to 20 carbon atoms, an arylsulfonyl group,
Examples include methanesulfonyl, butanesulfonyl, benzenesulfonyl, and toluenesulfonyl. Next, the monovalent organic group represented by R2, R4, R4', R6 and R7 above means a group that can be substituted on the benzene ring of the general formula (), () or (),
For example, it represents an alkyl group having 1 to 20 carbon atoms, an alkyloxy group, an alkylthio group, a phenyl group, a phenoxy group, an acyl group, an acylamino group, a sulfonamido group, an alkylamino group or an alkoxycarbonyl group. Next, the general formula () used in the present invention,
Specific examples of the compound represented by () or () (hereinafter referred to as the compound of the present invention) are given below,
It is not limited to these. [Example of compound of the present invention] ()-1 ()-2 ()-3 ()-4 ()-5 ()-6 ()-7 ()-1 ()-2 ()-3 ()-4 ()-5 ()-1 ()-2 ()-3 ()-4 ()-5 ()-6 ()-7 ()-8 ()-9 These compounds of the present invention are, for example,
No. 14034, No. 49-8338, No. 49-20977, JP-A-Sho
No. 52-35633, No. 52-147434, No. 53-17729,
No. 53-20327, No. 54-48538, No. 55-89836, No. 55-89836, No.
It can be synthesized by the methods described in Publications No. 47-4738 and No. 54-44521. The compounds of the present invention may be used alone or in combination of two or more. Although the amount of the compound of the present invention used is not limited,
It is preferable to use 10 to 1000 mol %, preferably 10 to 100 mol %, based on 1 mol of the maximum density image dye. The method of incorporating the compound of the present invention into an image-receiving element is not particularly limited, but may include [A] a method of coating or dipping onto a support forming an image-receiving element, a support that also serves as a thermal transfer element, or a method that is integrated with a thermal transfer element. In the case of a body-shaped image receiving element, there is a method of coating or dipping the surface of the thermal transfer element as an image receiving layer, or a method of adding the compound of the present invention in advance when forming the support [B]. be. In the former case [A], the compound of the present invention is dissolved in a suitable organic solvent (e.g., acetone, methanol, ethanol, ethyl acetate, dimethylformamide, dibutyl phthalate, tricresyl phosphate, etc.).
The image-receiving element can be added by dipping the image-receiving element in a solution in which the image-receiving element is dissolved, or by applying these solutions to the support or image-receiving layer. Alternatively, it can be added without a solvent or by dispersing it using a suitable organic solvent when producing the image-receiving layer. On the other hand, in the case of the latter [B], paper strength enhancers, sizing agents, natural or synthetic pulp,
The image-receiving element of the present invention can be produced by making paper using a paper machine using a mixed liquid (slurry) containing the compound of the present invention together with a filler, or by adding the compound of the present invention to a synthetic polymer dope and forming it into a film. There are ways to do this. Image receiving elements that can be used in the present invention include paper and synthetic polymers (films).
Examples of synthetic polymers (films) include polyacrylates (e.g. polymethyl acrylate, polyethyl acrylate), polyacrylonitrile,
Acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, polyacetal, polyether chloride, polyvinylidene chloride, polyvinyl chloride, polyvinylcarbazole, polystyrene, styrene-butadiene copolymer, polyacetate cellulose, polyacetal ( For example, polyvinyl butyral, polyvinyl formal), polytetrafluoroethylene, polychlorotrifluoroethylene, polyethylene, chlorinated polyethylene, polycarbonate, polyvinyl acetate, polyvinyl alcohol, polypropylene,
Polyvinylpyrrolidone, polyacrylates (e.g. polymethyl methacrylate, polyethyl methacrylate, polypropyl methacrylate, polyisopropyl methacrylate, poly-t-butyl methacrylate, polycyclohexyl methacrylate, polyethylene glycol dimethacrylate, poly-2-cyano-ethyl dimethacrylate) methacrylate, etc.), polyesters (for example, polyethylene terephthalate, etc.), polyamide, polyimide, polysulfone, etc. These synthetic polymers may be used alone or as a mixture, or as a copolymer. Particularly preferred image receiving elements include polyvinylidene chloride, polyvinyl chloride, polycarbonate, polyethylene terephthalate, polyacetate cellulose such as triacetate and diacetate, heptamethylene diamine and terephthalic acid, fluorene dipropylamine and adipic acid, hexamethylene diamine and Examples include polyamides synthesized from diphenic acid, hexamethylene diamine and isophthalic acid, and polyesters synthesized from diethylene glycol and diphenylcarboxylic acid, and ethylene glycol and bis-p-carboxyphenoxybutane. Further, the image receiving element of the present invention can be used, for example, in Japanese Patent Application No.
No. 122596, No. 57-205447, JP-A-57-186744
No. 57-179840, No. 57-198458, No. 57-
No. 207250, Patent Application No. 57-229649, No. 57-229650
It can be applied to a heat-developable photographic material or an image-receiving element for a thermal diffusion transfer method as shown in No. 57-229675. That is, the heat-diffusible dye released or formed by thermal development after imparting optical information is transferred to the image-receiving element of the present invention. The general technology relating to thermally developable elements and thermally developable photographic materials is known and may be used in combination with any of these types of thermally developable elements in the present invention. Further, the image receiving element of the present invention is disclosed in Japanese Patent Application No. 57-217063.
No. 57-217796, No. 57-217797, No. 57-
229651, JP-A No. 51-15446, JP-A No. 54-68253,
It can be used as an image receiving element for thermal transfer, which is also used for a thermal transfer recording medium or a thermal transfer recording method, as described in No. 57-160691. That is, for example, an ink sheet for thermal transfer and the image receiving element of the present invention are superimposed, and in response to thermal information from a thermal head, laser, xenon lamp, etc.,
The dye transferred onto the image-receiving element of the present invention exhibits a preferred color tone when brought into contact with, mixed with, or dissolved in the compound of the present invention contained in the image-receiving element. The general art regarding heat sensitive elements is known and the image receiving element of the present invention may be used in combination with any of these types of heat sensitive elements. In the present invention, thermal transfer refers to sublimation of a dye by heat (not limited to those that vaporize from a solid without passing through a liquid, but also includes those that vaporize with melting), melting, or diffusion by a solvent. It means to be transcribed. Furthermore, when the image-receiving element of the present invention is used as a heat-sensitive transfer material, (1) the heat-sensitive element is colored by a thermal head composed of a printed resistor, a thin film resistor, a semiconductor resistor, etc., or by a heat source such as a laser or a xenon lamp. In addition to methods for recording images, etc., (2) is a method for obtaining images, etc. on an image-receiving element by means of a heat source that is controlled according to image information from another system, in which dyes are transferred from a heat-sensitive element to an image-receiving element by a heat source. Of course, it can also be applied to a thermal transfer method. Various additives can be added to the image receiving element of the present invention. For example, inorganic additives such as titanium white, silica, talc, clay, talc, barium sulfate, calcium carbonate, glass powder, kaolin, and zinc oxide are added to give mattness, whiteness, smoothness, and gloss. It's okay. In addition, ultraviolet absorbers are used to improve image fastness and for other purposes.
It may also contain antioxidants, quenchers, and the like. The image-receiving element of the present invention is capable of transferring a dye produced from a thermally transferable dye-providing substance, and the image-receiving element of the present invention is placed in a stacked relationship with the thermal transfer element at least during thermal diffusion transfer. It can be used in combination with any type of thermal transfer element as long as it contains a thermally transferable dye-providing substance. It may be a peelable type. The dye used here may be any of azo dyes, anthraquinone dyes, azomethine dyes, indoaniline dyes, naphthoquinone dyes, nitro dyes, styryl dyes, phthalocyanine dyes, quinophthalone triphenylmethane dyes, cyanine dyes, etc. , azomethine dyes, and indoaniline dyes. Azomethine dyes have the following C=N- bonded chromophore in their molecules, and are generally formed from a compound having an active methylene group and an aromatic primary amine. In particular, the oxidative coupling reaction product of an open-chain active methylene compound and a p-phenylenediamine derivative results in a yellow dye, and the reaction product of a 1-phenyl-5-pyrazolone derivative results in a magenta dye. Indoaniline dye refers to N-(p-aminophenyl)-p-quinone imine and its derivatives, and is usually produced by a condensation reaction of p-nitrosophenol or quinone chloroimine with dialkylaniline or in an alkaline solution. It is synthesized by the reaction of nitroso or nitrodialkylaniline with phenol or naphthol in the presence of a reducing agent, or by the oxidative coupling reaction of a mixture of p-phenylenediamine derivative and phenol or naphthol. be. Various types of heat-transferable dye-providing substances that provide (release or form) heat-transferable dyes during heat development or heat-sensitive transfer are known [e.g., Japanese Patent Application No. 31288/1988], but the present invention The thermal transfer element associated with the image-receiving element may contain any type of thermally transferable dye-providing material. For example, US Patent No. 3531286, US Patent No. 3761270, US Patent No.
No. 3764328, Research Disclosure No. 15108, same
No. 15127, No. 12044, and No. 16479, etc., describe heat-developable photographic materials containing photographic couplers and color developing agents, and US Pat. No. 3,180,731;
Research Disclosure No.13443 and Research Disclosure No.14347
U.S. Patent No. 4235957, Research Disclosure No.
14433, same No.14448, same No.15227, same No.15776, same No.
No. 18137 and No. 19419, etc., apply the silver dye bleaching method, and U.S. Patent No. 4124398.
No. 4,124,387, and No. 4,123,273 each describe a method for thermally bleaching a photothermographic material, and the present invention can be applied to any of these methods. The thermal transfer element combined with the image receiving element of the present invention comprises:
In the case of a heat-developable photosensitive element, the structure is not limited to the conventionally known structure, and for example, a developer (reducing agent) may not be substantially added to the photosensitive element, but may be contained in the image receiving element of the present invention. These photosensitive elements also include organic silver salts, developers (reducing agents), dye-providing substances, binders, silver halide, additives (tone modifiers, development modifiers, chemical sensitizers, physical (spectral) sensitizers, etc.). In addition to a photosensitive layer containing a photosensitive agent, an antifoggant, a filter dye, an antihalation dye, a dye release aid, etc., the photosensitive layer also has photographic constituent layers such as an intermediate layer, a protective layer, a subbing layer, or a barrier layer. Good too. Further, when the present invention is applied to a heat-developable photographic material, it may have a reflective layer. On the other hand, even when the thermal transfer element combined with the image-receiving element of the present invention is a heat-sensitive element, the heat-sensitive element may contain various additives. As mentioned above, the image-receiving element of the present invention may consist of only an image-receiving layer coated or stacked on a thermal transfer element, or it may be composed of an image-receiving layer and a support. be. [Example] Preferred examples of the present invention are shown below, but the present invention is not limited to these examples. Example 1 A heat-developable photographic material was prepared as follows. To 9.20 g of 4-sulfobenzotriazole silver, 24 ml of a water-soluble polyvinyl butyral 25% aqueous solution (Sekisui Chemical Co., Ltd., ESLETSUKU W-201), 116 ml of water, and 70 ml of methanol were added, and the mixture was ground and dispersed in an alumina ball mill to obtain a silver salt dispersion. Ta. To 25 ml of this silver salt dispersion, 0.21 g of phthalic acid, 0.16 g of phthalazine, 0.93 g of the following heat transferable dye-providing substance (A),
0.57 g of the following developer (B), 5 ml of a 25% aqueous solution of water-soluble polyvinyl butyral, 10 ml of water, and a silver iodide gelatin emulsion with an average particle size of 0.04 μ are converted into silver.
36mg was added, and the wet film thickness was measured on photographic baryta paper.
A photosensitive layer was provided by coating with a wire bar to a thickness of 55 μm to obtain a photosensitive element. Thermal transferable dye-providing substance (A) Developer (B) The dried photosensitive element was exposed to 30,000 CMS through a step wedge. On the other hand, for the image-receiving element, cellulose diacetate (degree of acetylation of about 60%) was first prepared on ivory paper.
It was coated at 1.40 g/m ² and dried to obtain an image-receiving layer. Next, using the compounds of the present invention shown in Table 1 below,
Add 10 g of each of these compounds to a mixture of 5 ml of dibutyl phthalate and 200 ml of ethyl acetate, heat to 60°C to completely dissolve, and add the image of the cellulose diacetate to the solution containing the compound of the present invention. The image-receiving element coated with the layer was immersed to impregnate the image-receiving element with the compound of the invention and dried to produce an image-receiving element of the invention. The photosensitive layer surface of the exposed photosensitive element and the image-receiving layer surface of the image-receiving element were brought into close contact and heated under pressure for 30 seconds with an iron having a surface temperature of 150° C., and then both elements were peeled off. An orange step wedge negative image with a maximum reflection density of 0.60 and a minimum reflection density of 0.08 was obtained in the image receiving layer. The image receiving elements obtained by the above treatment were tested for light resistance. In the table, the light resistance was determined by irradiating each image obtained with a 6000 W xenon lamp for 48 hours (illuminance on the image plane was 6000 lux), and expressing the residual rate at an initial density of 0.5 as a percentage after irradiation. As is clear from the same table, it can be seen that the image receiving element containing the compound of the present invention has excellent light resistance.

【表】実施例２感熱転写材料を次のようにして作つた。最初に厚さ6μのポリエチレンテレフタレート
フイルムベースに、下記組成物をウエツト膜厚
59.4μとなるようにワイヤーバーを用いて塗布、
乾燥し、インク層を形成した。〓二酢酸セルロース 0.6g １−（２−ピリジルアゾ）−２−ナフトール
0.3g アセトン 20ml 続いて、前記インク層の上に下記組成物をウエ
ツト膜厚27.4μとなるよう塗布、乾燥し熱溶融性
層を形成し、感熱要素を得た。パーマリンPN（三洋化成製） 10ml 水 10ml ２％アニオン系活性剤 0.3ml 一方、受像要素としては、下記組成物を300℃
で加熱溶融し、２軸延伸して、100μのフイルム
状に形成した。ポリエチレンテレフタレート 100g 本発明の化合物（第２表に示す） 1mmol ジブチルフタレート 0.50g 次に、感熱転写試験について説明する。即ち、
前記感熱要素のインク層と前記受像要素とを向い
合わせにして重ね、感熱要素支持体側からサーマ
ルヘツドにより発熱体を介して加熱して色素を熱
拡散転写させた。得られた転写画像を6000Wのキ
セノンランプで48時間照射し（画像面上の照度は
6000ルツクス）、照射前と照射後においてλmax
により光学濃度（照射前D⁰、照射後D¹）を測定
し、D¹／D⁰×100（％）を残存率とし、耐光性を
テストした。これらの結果を第２表に示す。同表から明らかなように、本発明の化合物を含
有する受像要素は耐光性に優れていることがわか
る。[Table] Example 2 A thermal transfer material was produced as follows. First, apply the following composition to a 6μ thick polyethylene terephthalate film base to a wet film thickness.
Apply using a wire bar to give a thickness of 59.4μ.
It was dried to form an ink layer. 〓Cellulose diacetate 0.6g 1-(2-pyridylazo)-2-naphthol
0.3g Acetone 20ml Subsequently, the following composition was coated on the ink layer to a wet film thickness of 27.4μ, and dried to form a heat-fusible layer to obtain a heat-sensitive element. Permarin PN (manufactured by Sanyo Kasei) 10ml Water 10ml 2% anionic activator 0.3ml On the other hand, as an image receiving element, the following composition was heated at 300°C.
The mixture was melted by heating and stretched biaxially to form a film of 100 μm. Polyethylene terephthalate 100g Compound of the present invention (shown in Table 2) 1mmol Dibutyl phthalate 0.50g Next, a thermal transfer test will be explained. That is,
The ink layer of the heat-sensitive element and the image-receiving element were placed facing each other and heated from the heat-sensitive element support side using a thermal head through a heating element to thermally diffuse transfer the dye. The resulting transferred image was irradiated with a 6000W xenon lamp for 48 hours (the illuminance on the image surface was
6000 lux), λmax before and after irradiation
The optical density (D ⁰ before irradiation, D ¹ after irradiation) was measured using D ¹ /D ⁰ ×100 (%) as the residual rate, and the light resistance was tested. These results are shown in Table 2. As is clear from the same table, it can be seen that the image receiving element containing the compound of the present invention has excellent light resistance.

【表】実施例３熱現像写真材料を次のようにして作つた。実施例−１における、写真用バライタ紙のかわ
りに、ポリスチレン−ブタジエンコポリマーラテ
ツクス下引を施した厚さ100μの透明ポリイミド
フイルム（KAPTON、デユポン社製）を支持体
として用い、実施例−１と同じ条件で塗布して感
光層を形成した。その上に下記組成の白色反射層
および受像層を設け、該受像層の上に厚さ50μの
透明ポリエチレンテレフタレートフイルムを接着
した。〈白色反射層〉（単位：ｇ／m²）チタンホワイト（平均粒径1.5μ） 12.0 水溶性ポリビニルブチラール（エスレツクＷ−
201、積水化学） 1.3g 〈受像層〉（単位：ｇ／m²）本発明の化合物（第３表に示す。） 0.5 ポリビニルブチラール（エスレツクBX−１、
積水化学） 1.8 この試料の感光層側に対して、ステツプウエツ
ジを通して30000CMSの露光を与え、スリーエム
社製熱現像機“デイベロツパーモジユール277”
を用いて、150℃で30秒間加熱をした。受像層側表面には、最大反射濃度0.67、最小反
射濃度0.06の橙色のステツプウエツジのネガ像が
得られた。実施例−１と同様の耐光性の試験を第３表に表
わした。同表から明らかなように、本発明の化合物を含
有する受像層は優れた耐光性を示すことがわか
る。[Table] Example 3 A heat-developable photographic material was produced as follows. In place of the photographic baryta paper in Example-1, a 100μ thick transparent polyimide film (KAPTON, manufactured by Dupont) coated with polystyrene-butadiene copolymer latex was used as a support, and the same procedure as in Example-1 was used. A photosensitive layer was formed by coating under the same conditions. A white reflective layer and an image-receiving layer having the following compositions were provided thereon, and a transparent polyethylene terephthalate film having a thickness of 50 μm was adhered onto the image-receiving layer. <White reflective layer> (Unit: g/ ^m2 ) Titanium white (average particle size 1.5μ) 12.0 Water-soluble polyvinyl butyral (Eslec W-
201, Sekisui Chemical) 1.3g <Image receiving layer> (Unit: g/ ^m2 ) Compound of the present invention (shown in Table 3) 0.5 Polyvinyl butyral (Eslec BX-1,
(Sekisui Chemical) 1.8 The photosensitive layer side of this sample was exposed to 30,000 CMS through a step wedge, and the photosensitive layer was exposed to 30,000 CMS using a 3M heat developing machine “Deiberotsu Per Module 277”.
was heated for 30 seconds at 150°C. An orange step wedge negative image with a maximum reflection density of 0.67 and a minimum reflection density of 0.06 was obtained on the surface of the image-receiving layer. The same light resistance test as in Example 1 is shown in Table 3. As is clear from the table, it can be seen that the image-receiving layer containing the compound of the present invention exhibits excellent light resistance.

【表】比較実験例１実施例−１の受像層に湿式写真で公知の第４表
−Ａに記載した化合物を実施例−１と同様の方法
により添加して比較受像材料ａ−ｇを作成した。次いで実施例−１と同様にして露光済みの感光
要素と受像要素を重ね合わせ、表面温度が150℃
のアイロンで30秒間圧着加熱し、両要素をひきは
がして受像要素に転写画像色素を得た。この画像色素を6000ルツクスの照度を有するキ
セノンランプで48時間光照射後、初期濃度0.5で
の色素残存率を百分率で求め、結果を第４表−Ａ
に示した。一方、初濃度青反射濃度（Db）0.5及び光照射
後の青反射濃度（Db）0.5のそれぞれにおける緑
反射濃度値（Dg）を求め、色素の変色（色汚染）
を調べた。結果を第４表−Ａに合わせて示す。[Table] Comparative Experimental Example 1 Comparative image-receiving materials a-g were prepared by adding the compounds listed in Table 4-A, which are known in wet photography, to the image-receiving layer of Example-1 in the same manner as in Example-1. did. Next, the exposed photosensitive element and image receiving element were stacked in the same manner as in Example 1, and the surface temperature was adjusted to 150°C.
The two elements were pressed and heated for 30 seconds with an iron, and both elements were peeled off to obtain a transferred image dye on the image-receiving element. After irradiating this image dye with a xenon lamp with an illuminance of 6000 lux for 48 hours, the dye residual rate at an initial density of 0.5 was determined as a percentage, and the results are shown in Table 4-A.
It was shown to. On the other hand, the green reflection density value (Dg) was determined at each of the initial density blue reflection density (Db) 0.5 and the blue reflection density (Db) 0.5 after light irradiation, and the color change (color contamination) of the pigment was determined.
I looked into it. The results are also shown in Table 4-A.

【表】使用した画像安定剤の構造式は以下の通りであ
る。ａｂｃｄｅｆｇ第４表−Ａの結果から、従来、湿式処理で画像
安定改良剤として知られている化合物が必ずしも
加熱下で色素転写される画像色素に対して効果的
な耐光性改良効果を示すものとは認められないこ
とが判る。一方比較化合物ｂやｃの様に僅かの濃度低下に
対して改良効果を示す化合物もないことはない
が、これらの化合物は色汚染の項で見られる様に
光照射により色調が変化していることが判る。比較実験例２実施例−１で使用した画像安定剤（）−２，
（）−１，（）−６を色素受像要素に添加する代
わりに、感光要素中に添加した感光要素Ｒ−２，
Ｒ−３，Ｒ−４をそれぞれ実施例−１記載の方法
と同様にして作成した。この感光要素を露光後、実施例−１記載の受像
要素−１と重ね合わせ、実施例−１に記載の方法
で熱現像・色素転写を加熱下で行つた。得られた色素画像（試料Noをそれぞれ、Ｒ−
2J，Ｒ−3J，Ｒ−4Jで表す）を前記比較実験−１
と同様にして、光照射して色素濃度の退色を調べ
た。結果を第４表−Ｂに示す。[Table] The structural formula of the image stabilizer used is as follows. a b c. d e f g From the results in Table 4-A, it is clear that compounds conventionally known as image stabilization improvers in wet processing do not necessarily show an effective lightfastness improving effect on image dyes transferred under heating. It turns out that it is not acceptable. On the other hand, there are some compounds like Comparative Compounds b and c that show an improvement effect against a slight decrease in concentration, but as seen in the section on color contamination, the color tone of these compounds changes when exposed to light. I understand that. Comparative Experiment Example 2 Image stabilizer ()-2 used in Example-1,
Instead of adding ()-1, ()-6 to the dye image-receiving element, photosensitive element R-2,
R-3 and R-4 were each produced in the same manner as described in Example-1. After exposure, this photosensitive element was superimposed on the image-receiving element-1 described in Example-1, and thermal development and dye transfer were performed under heating in the manner described in Example-1. The obtained dye images (each sample number is R-
2J, R-3J, R-4J) in the comparative experiment-1
In the same manner as above, the pigment concentration was examined for fading by light irradiation. The results are shown in Table 4-B.

【表】第４表−Ｂの結果から、本発明の画像安定剤を
感光要素中に添加した場合には、ほとんど耐光性
改良効果が認められないことが判る。[Table] From the results in Table 4-B, it can be seen that when the image stabilizer of the present invention is added to a photosensitive element, almost no light fastness improvement effect is observed.

Claims

[Scope of Claims] 1. For a heat-developable color photosensitive element containing a heat-transferable dye-providing substance and in which the dye is thermally diffused under heating, at least in an image-receiving element placed in a stacked relationship during thermal transfer, An image-receiving element for thermal development diffusion transfer photography, characterized in that the image-receiving element contains at least one compound represented by the following general formula (), (), or (). General formula () General formula () General formula () [In the formula, R1, R1', R3, R3' and R5 each represent a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, an acyl group or a sulfonyl group, and R2, R4,
R4', R6 and R7 each represent a hydrogen atom, a halogen atom or a monovalent organic group, q each represents an integer from 1 to 4, and m, n and p each represent an integer from 1 to 3. Also, m, n, p
and q are each 2 or more, R2, R4,
R4', R6 and R7 may be the same or different. ] 2 For a color heat-sensitive element containing a thermally transferable dye-providing substance and sublimation-transferring a dye under heating, at least an image-receiving element placed in a stacked relationship during thermal transfer, the image-receiving element has the following general formula ( ), (), or (). General formula () General formula () General formula () [In the formula, R1, R1', R3, R3' and R5 each represent a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, an acyl group or a sulfonyl group, and R2, R4,
R4', R6 and R7 each represent a hydrogen atom, a halogen atom or a monovalent organic group, q each represents an integer from 1 to 4, and m, n and p each represent an integer from 1 to 3. Also, m, n, p
and q are each 2 or more, R2, R4,
R4', R6 and R7 may be the same or different. ]