JPS6229467B2 - - Google Patents
Info
- Publication number
- JPS6229467B2 JPS6229467B2 JP18493085A JP18493085A JPS6229467B2 JP S6229467 B2 JPS6229467 B2 JP S6229467B2 JP 18493085 A JP18493085 A JP 18493085A JP 18493085 A JP18493085 A JP 18493085A JP S6229467 B2 JPS6229467 B2 JP S6229467B2
- Authority
- JP
- Japan
- Prior art keywords
- irradiation
- radiation
- color
- discoloration
- paint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000002845 discoloration Methods 0.000 claims description 14
- 230000005855 radiation Effects 0.000 claims description 12
- 239000003973 paint Substances 0.000 claims description 10
- 239000004593 Epoxy Substances 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 7
- 229910052736 halogen Inorganic materials 0.000 claims description 5
- 150000002367 halogens Chemical class 0.000 claims description 5
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 claims description 4
- JCYPECIVGRXBMO-UHFFFAOYSA-N 4-(dimethylamino)azobenzene Chemical compound C1=CC(N(C)C)=CC=C1N=NC1=CC=CC=C1 JCYPECIVGRXBMO-UHFFFAOYSA-N 0.000 claims description 3
- FRPHFZCDPYBUAU-UHFFFAOYSA-N Bromocresolgreen Chemical compound CC1=C(Br)C(O)=C(Br)C=C1C1(C=2C(=C(Br)C(O)=C(Br)C=2)C)C2=CC=CC=C2S(=O)(=O)O1 FRPHFZCDPYBUAU-UHFFFAOYSA-N 0.000 claims description 3
- 239000000049 pigment Substances 0.000 claims description 3
- ZPLCXHWYPWVJDL-UHFFFAOYSA-N 4-[(4-hydroxyphenyl)methyl]-1,3-oxazolidin-2-one Chemical compound C1=CC(O)=CC=C1CC1NC(=O)OC1 ZPLCXHWYPWVJDL-UHFFFAOYSA-N 0.000 claims description 2
- UDSAIICHUKSCKT-UHFFFAOYSA-N bromophenol blue Chemical compound C1=C(Br)C(O)=C(Br)C=C1C1(C=2C=C(Br)C(O)=C(Br)C=2)C2=CC=CC=C2S(=O)(=O)O1 UDSAIICHUKSCKT-UHFFFAOYSA-N 0.000 claims description 2
- CEQFOVLGLXCDCX-WUKNDPDISA-N methyl red Chemical compound C1=CC(N(C)C)=CC=C1\N=N\C1=CC=CC=C1C(O)=O CEQFOVLGLXCDCX-WUKNDPDISA-N 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- PRZSXZWFJHEZBJ-UHFFFAOYSA-N thymol blue Chemical compound C1=C(O)C(C(C)C)=CC(C2(C3=CC=CC=C3S(=O)(=O)O2)C=2C(=CC(O)=C(C(C)C)C=2)C)=C1C PRZSXZWFJHEZBJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 6
- 229920000915 polyvinyl chloride Polymers 0.000 description 6
- 239000000975 dye Substances 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011342 resin composition Substances 0.000 description 3
- 229920000298 Cellophane Polymers 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 238000009930 food irradiation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- CABDEMAGSHRORS-UHFFFAOYSA-N oxirane;hydrate Chemical compound O.C1CO1 CABDEMAGSHRORS-UHFFFAOYSA-N 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 235000012424 soybean oil Nutrition 0.000 description 2
- 239000003549 soybean oil Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 230000005865 ionizing radiation Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Description
〔産業上の利用分野〕
本発明は、放射線の簡便な総量測定用の放射線
変色塗料に関する。
〔従来技術〕
近年、放射線の工業利用は、食品照射、医療器
具の滅菌、電線、収縮チユーブ等のプラスチツク
の架橋等と非常に広範囲の産業分野にわたつてい
る。これらの放射線利用に際しては、放射線量を
簡便な方法で測定し管理することが必要であり、
これまで線量計としては、三酢酸セルロースフイ
ルム（CTA）線量計、ポリエチレンテレフタレ
ートフイルム（PET）線量計、ポリメチルメタ
クリレート（PMMA）線量計、ポリカーボネー
ト線量計、ブルーセロフアン線量計、ラジオクロ
ミツク線量計等がある。更には、ポリ塩化ビニル
をベースとした照射変色テープがある。
〔発明が解決しようとする問題点〕
しかし乍らCTA，PET，PMMA，ブルーセロ
フアン等の線量計では、線量測定の為に照射後紫
外線吸光度計等により吸光度を測定する必要があ
り、簡便な線量計とは言い難い。一方PVC変色
テープでは10Mrad以下の照射線量では、変色が
比較的鮮明であるが、照射線量が10Mradを越え
ると照射線量と変色の感度が鈍く、食品照射や医
療用殺菌等の比較的低線量分野では有効である
が、電線、収縮チユーブ等の10Mrad以上の照射
線量が要求される分野では使用出来ないものであ
る。
上記に鑑み本発明は、特に10Mrad以上の比較
的高線量領域での簡便な照射線量測定という要求
に答えるべく開発されたものである。以下に詳細
に本発明を説明する。
〔問題点を解決するための手段〕
本発明は、分子構造内にハロゲンを含むポリマ
ーに、PHの変化により変色する色素及びエポキシ
化合物を添加した樹脂組成物を、該ポリマーの良
溶媒に溶解させ必要に応じ分散剤、無機フイラー
等を添加したもので、放射線を照射することによ
り変色することを特徴とする放射線変色塗料であ
る。
〔作用〕
上記により、放射線照射により変色する塗料が
得られる。
ここで言う放射線とは、電子線、γ線，Ｘ線、
紫外線等である。
上記に於いて、ハロゲンを含むポリマーとして
は、塩化ビニル樹脂、塩化ビニル―酢酸ビニル共
重合体、エチレン―酢酸ビニル―塩化ビニルグラ
フトマー、クロロプレンゴム、クロルスルフオン
化エチレンゴム、塩化ビニリデン樹脂、弗化ビニ
リデン樹脂、弗化ビニリデン―六弗化プロピレン
共重合体、弗化ビニリデン―四弗化エチレン共重
合体などである。
分子構造内にハロゲンを含むポリマーをベース
としたことにより電離放射線の作用によりハロゲ
ンが単離又は水素付加し系のPH変化をもたらす結
果となる。
色素としては、PHの変化により色が変わるもの
であれば良いのであるが、特にフエノールフタレ
イン、メチルイエロー、ブロモチモールブルー、
ブロモフエノールブルー、チモールブルー、ブロ
モクレゾールグリーン、メチルレツドから成る群
より選ばれた色素を単独又は二種類以上組合せて
用いることにより、放射線照射による色の変化が
より顕著になる。
エポキシ化合物としては、分子構造内にエポキ
シ基を持つものであれば良く、エポキシ化大豆
油、エポキシ系可塑剤、エポキシ樹脂等である。
エポキシ化合物を添加する目的は、照射線量に
対応する変色域をコントロールする為である。
又、エポキシ化合物の添加量は、使用する色素及
び照射線量―変色域の設定によつて異なるもので
ある。
以下に実施例をもつて本発明の説明を行なう。
〔実施例〕
実施例 １
ポリ塩化ビニルに対しメチルイエローを
2.5PHR添加した樹脂組成物に、エポキシ化合物
として、エポキシ化脂肪酸エステル（オキシラン
酸素4.0〜4.5％）をポリ塩化ビニルに対し、５，
10，15，20PHR添加し、酢酸ブチルに溶解し照
射変色塗料となした。該照射変色塗料をポリエス
テルフイルム上に塗布し、乾燥後、0.4MeVの電
子線を各々６，12，24，36，48Mrad照射し変色
の程度を確認した。この照射による変色の状況を
第１表に示した。この表から明らかな様にエポキ
シ化脂肪酸エステルの添加量に比例し、変色領域
が高線量側に移行することがわかる。この様に高
線量領域においても簡便な線量計として使用でき
ることが確認できた。
実施例 ２
ポリ塩化ビニルに対し、ブロモクレゾールグリ
ーンを2.5PHR添加した樹脂組成物にエポキシ化
大豆油（オキシラン酸素6.8％）をポリ塩化ビニ
ルに対し、３，７，10，13PHR各々添加し、テ
トラヒドロフランに溶解し、照射変色塗料となし
た。該照射変色塗料をポリエステルフイルム上に
塗布し、乾燥後0.4MeVの電子線を各々６，12，
24，36，48Mrad照射し、変色の程度を確認し
た。この照射による変色の状況を第２表に示し
た。この表から、高線量領域において
簡便な線量計として使用できることが分かつた。
〔発明の効果〕
本発明になる塗料は高線量領域において簡便に
線量計として使用出来る。
[Industrial Field of Application] The present invention relates to a radiation color-changing paint for convenient measurement of the total amount of radiation. [Prior Art] In recent years, industrial use of radiation has spread to a very wide range of industrial fields, including food irradiation, sterilization of medical instruments, and crosslinking of plastics such as electric wires and shrink tubes. When using these types of radiation, it is necessary to measure and manage the radiation dose using a simple method.
So far, we have used cellulose triacetate film (CTA) dosimeters, polyethylene terephthalate film (PET) dosimeters, polymethyl methacrylate (PMMA) dosimeters, polycarbonate dosimeters, blue cellophane dosimeters, and radiochromic dosimeters. etc. Furthermore, there are irradiation discoloration tapes based on polyvinyl chloride. [Problems to be solved by the invention] However, with dosimeters such as CTA, PET, PMMA, and blue cellophane, it is necessary to measure the absorbance after irradiation using an ultraviolet absorbance meter, etc., in order to measure the dose. It is hard to call it a dosimeter. On the other hand, with PVC discoloration tape, the discoloration is relatively clear at an irradiation dose of 10 Mrad or less, but when the irradiation dose exceeds 10 Mrad, the sensitivity of the irradiation dose and discoloration becomes dull, and it is used in relatively low-dose applications such as food irradiation and medical sterilization. However, it cannot be used in fields where an irradiation dose of 10 Mrad or more is required, such as for electric wires and shrink tubes. In view of the above, the present invention was developed to meet the need for simple irradiation dose measurement, particularly in a relatively high dose region of 10 Mrad or more. The present invention will be explained in detail below. [Means for Solving the Problems] The present invention involves dissolving a resin composition in which a dye and an epoxy compound that change color due to changes in pH are added to a polymer containing a halogen in its molecular structure in a good solvent for the polymer. It is a radiation color-changing paint that contains a dispersant, an inorganic filler, etc. as necessary, and is characterized by changing color when irradiated with radiation. [Function] Through the above process, a paint that changes color upon irradiation with radiation can be obtained. The radiation referred to here includes electron beams, gamma rays, X-rays,
UV rays, etc. In the above, examples of polymers containing halogen include vinyl chloride resin, vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate-vinyl chloride graftomer, chloroprene rubber, chlorosulfonated ethylene rubber, vinylidene chloride resin, These include vinylidene fluoride resin, vinylidene fluoride-propylene hexafluoride copolymer, and vinylidene fluoride-ethylene tetrafluoride copolymer. Since the polymer is based on a polymer containing a halogen in its molecular structure, the halogen is isolated or hydrogenated by the action of ionizing radiation, resulting in a change in the pH of the system. Any pigment that changes color depending on changes in pH is fine, but in particular, phenolphthalein, methyl yellow, bromothymol blue,
By using dyes selected from the group consisting of bromophenol blue, thymol blue, bromocresol green, and methyl red, alone or in combination, the color change caused by radiation irradiation becomes more noticeable. The epoxy compound may be any compound having an epoxy group in its molecular structure, such as epoxidized soybean oil, epoxy plasticizers, and epoxy resins. The purpose of adding the epoxy compound is to control the area of discoloration corresponding to the irradiation dose.
Further, the amount of the epoxy compound added varies depending on the dye used and the setting of the irradiation dose and discoloration range. The present invention will be explained below with reference to Examples. [Example] Example 1 Adding methyl yellow to polyvinyl chloride
To the resin composition to which 2.5 PHR was added, epoxidized fatty acid ester (oxirane oxygen 4.0 to 4.5%) was added as an epoxy compound to the polyvinyl chloride.
10, 15, and 20 PHR were added and dissolved in butyl acetate to make an irradiation discoloration paint. The irradiation discoloration paint was applied onto a polyester film, and after drying, it was irradiated with a 0.4 MeV electron beam of 6, 12, 24, 36, and 48 Mrad to check the degree of discoloration. Table 1 shows the discoloration caused by this irradiation. As is clear from this table, the discoloration region shifts to the high dose side in proportion to the amount of epoxidized fatty acid ester added. In this way, it was confirmed that it can be used as a simple dosimeter even in high dose areas. Example 2 To a resin composition in which 2.5 PHR of bromocresol green was added to polyvinyl chloride, 3, 7, 10, and 13 PHR of epoxidized soybean oil (6.8% oxirane oxygen) were added to polyvinyl chloride, and tetrahydrofuran was added. It was dissolved in irradiation to create a color-changing paint. The irradiation color-changing paint was applied onto a polyester film, and after drying, 0.4 MeV electron beam was applied to 6, 12 and 12, respectively.
The degree of discoloration was confirmed by irradiating with 24, 36, and 48 Mrad. Table 2 shows the discoloration caused by this irradiation. From this table, it was found that it can be used as a simple dosimeter in high dose areas. [Effects of the Invention] The paint according to the present invention can be easily used as a dosimeter in a high dose area.
【表】【table】
Claims (1)
の変化により変色する色素と、エポキシ化合物
と、前記ポリマーの良溶媒とから成ることを特徴
とする放射線変色塗料。 ２ 色素が、フエノールフタレイン、メチルイエ
ロー、ブロモチモールブルー、ブロモフエノール
ブルー、チモールブルー、ブロモクレゾールグリ
ーン、メチルレツドから成る群より選ばれた単独
又は組合せである特許請求の範囲第１項記載の放
射線変色塗料。[Claims] 1. A polymer containing a halogen in its molecular structure and a PH
1. A radiation color-changing paint comprising a pigment that changes color due to a change in color, an epoxy compound, and a good solvent for the polymer. 2. Radiation discoloration according to claim 1, wherein the pigment is selected from the group consisting of phenolphthalein, methyl yellow, bromothymol blue, bromophenol blue, thymol blue, bromocresol green, and methyl red, either alone or in combination. paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18493085A JPS6245672A (en) | 1985-08-23 | 1985-08-23 | Paint changing color on exposure to radiation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18493085A JPS6245672A (en) | 1985-08-23 | 1985-08-23 | Paint changing color on exposure to radiation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6245672A JPS6245672A (en) | 1987-02-27 |
| JPS6229467B2 true JPS6229467B2 (en) | 1987-06-26 |
Family
ID=16161829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18493085A Granted JPS6245672A (en) | 1985-08-23 | 1985-08-23 | Paint changing color on exposure to radiation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6245672A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63196471U (en) * | 1987-06-06 | 1988-12-16 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060236470A1 (en) * | 2005-03-29 | 2006-10-26 | Sabnis Ram W | Novelty compositions with color changing indicator |
-
1985
- 1985-08-23 JP JP18493085A patent/JPS6245672A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63196471U (en) * | 1987-06-06 | 1988-12-16 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6245672A (en) | 1987-02-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |