JPS596164B2 - Pigment dispersant for paints - Google Patents
Pigment dispersant for paintsInfo
- Publication number
- JPS596164B2 JPS596164B2 JP54167880A JP16788079A JPS596164B2 JP S596164 B2 JPS596164 B2 JP S596164B2 JP 54167880 A JP54167880 A JP 54167880A JP 16788079 A JP16788079 A JP 16788079A JP S596164 B2 JPS596164 B2 JP S596164B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- paints
- pigment dispersant
- mixture
- soluble copolymer
- 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
Landscapes
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Paints Or Removers (AREA)
Description
【発明の詳細な説明】 本発明は塗料用顔料分散剤に関する。[Detailed description of the invention] The present invention relates to a pigment dispersant for paints.
一般に塗料は、炭酸カルシウム、酸化チタン、クレー、
カオリン、水酸化アルミニウム、酸化鉄、フタロシアニ
ンブルー等の顔料、および各種樹脂から製造されている
が、塗膜の光沢・発色性の点から、塗料中の顔料粒子の
分散性が優れていることが望ましい。Generally, paints include calcium carbonate, titanium oxide, clay,
It is manufactured from pigments such as kaolin, aluminum hydroxide, iron oxide, phthalocyanine blue, and various resins, and the dispersibility of pigment particles in the paint is said to be excellent in terms of gloss and color development of the paint film. desirable.
また、塗料の製造は、各種の顔料を混合して製造するた
め、顔料の混合時において凝集などの不都合な現象が生
じないことが必要である。従つて、以上の理由から塗料
の製造に分散剤が使用されている。Furthermore, since paints are manufactured by mixing various pigments, it is necessary that undesirable phenomena such as agglomeration do not occur during the mixing of the pigments. Therefore, for the above reasons, dispersants are used in the production of paints.
従来、この種の分散剤としては、α−オレフィンと無水
マレイン酸の水溶性共重合体、特にジイソブチレンと無
水マレイン酸の水溶性共重合体が広く使用されているが
、分散性、低泡性及び混和性の点で必ずしも満足なもの
ではなかつた。そこで、本発明者らは分散性、低泡性及
び混和性の優れた分散剤を見出すべく鋭意研究した結果
、驚くべきことに、従来の分散剤と構造が似た化合物で
あるが、シクロペンテン又はシクロヘキセンと無水マレ
イン酸又は無水イタコン酸との水溶性共重合体が、低泡
性であり、且つ各種の顔料に対し極めて優れた分散作用
を有し、更には各種樹脂との混和性が良い事を見出し本
発明を完成した。Conventionally, water-soluble copolymers of α-olefin and maleic anhydride, especially water-soluble copolymers of diisobutylene and maleic anhydride, have been widely used as this type of dispersant; It was not always satisfactory in terms of stability and miscibility. Therefore, the present inventors conducted intensive research to find a dispersant with excellent dispersibility, low foaming properties, and miscibility.As a result, surprisingly, a compound similar in structure to conventional dispersants was found, but cyclopentene or The water-soluble copolymer of cyclohexene and maleic anhydride or itaconic anhydride has low foaming properties, has extremely excellent dispersion properties for various pigments, and has good miscibility with various resins. They found this and completed the present invention.
即ち、本発明はシクロペンテン又はシクロヘキセンある
いはこれらの混合物と無水マレイン酸又は無水イタコン
酸あるいはこれらの混合物との水溶性共重合体よりなる
塗料用顔料分散剤を提供するものである。また、かかる
水溶性共重合体はシクロペンテン又はシクロヘキセンあ
るいはこれらの混合物と無水マレイン酸又は無水イタコ
ン酸あるいはこれらの混合物よりなるモル比約１：１の
共重合体であり、蒸気圧平衝法による分子量測定で３０
０〜３００００の範囲である。That is, the present invention provides a pigment dispersant for paints comprising a water-soluble copolymer of cyclopentene or cyclohexene or a mixture thereof and maleic anhydride or itaconic anhydride or a mixture thereof. The water-soluble copolymer is a copolymer of cyclopentene or cyclohexene or a mixture thereof and maleic anhydride or itaconic anhydride or a mixture thereof in a molar ratio of about 1:1, and has a molecular weight as determined by vapor pressure equilibrium method. 30 by measurement
It ranges from 0 to 30,000.
平均分子量が３００以下の共重合体や３００００以上の
共重合体は分散性が劣る。好ましくは５００〜１０００
０の範囲である。本発明の水溶性共重合体は、ナトリウ
ム、カリウム等のアルカリ金属塩又はアンモニウム塩が
好ましいが、一部アルカリ土類金属の塩としてもよく、
未中和部分を残しておいてもよい。Copolymers with an average molecular weight of 300 or less or 30,000 or more have poor dispersibility. Preferably 500-1000
It is in the range of 0. The water-soluble copolymer of the present invention is preferably an alkali metal salt such as sodium or potassium salt or an ammonium salt, but may also be partially an alkaline earth metal salt.
An unneutralized portion may be left.
本発明の水溶性共重合体を得る方法は特に限定されるも
のではないが、代表的な合成法を示すと次の通りである
。Although the method for obtaining the water-soluble copolymer of the present invention is not particularly limited, typical synthetic methods are as follows.
即ち、シクロベンゼン又はシクロヘキセンあるいはこれ
らの混合物と無水マレイン酸又は無水イタコン酸あるい
はこれらの混合物をベンゼン溶媒中で、重合開始剤とし
て過酸化ベンゾイルを用いて重合せしめ、ベンゼン留出
後、苛性アルカリ液で中和し目的物を得る。本発明の水
溶性共重合体が、いかにして他の分散剤特にα−オレフ
インと無水マレイン酸の水溶性共重合体と異なり、優れ
た分散作用、混和作用を有するかについての機作は必ず
しも明らかではないが、恐らく、本発明の分散剤の特徴
的構造、つまり共重合体の結合鎖の中に環状栴造が含ま
れている為、リジツド（Ｒｉｇｉｄ）な構造となり顔料
に対し強固に吸着しやすい為と考えられる。That is, cyclobenzene or cyclohexene or a mixture thereof and maleic anhydride or itaconic anhydride or a mixture thereof are polymerized in a benzene solvent using benzoyl peroxide as a polymerization initiator, and after distilling off the benzene, the mixture is treated with a caustic alkaline solution. Neutralize and obtain the target. The mechanism behind why the water-soluble copolymer of the present invention has excellent dispersion and miscibility properties, unlike other dispersants, particularly water-soluble copolymers of α-olefin and maleic anhydride, is not necessarily clear. Although it is not clear, it is probably due to the characteristic structure of the dispersant of the present invention, that is, the cyclic structure is included in the bonded chain of the copolymer, resulting in a rigid structure that strongly adsorbs to pigments. This is probably because it is easy to do.
以上のように本発明の水溶性共重合体は、従来使用され
ている塗料用顔料分散剤に比べ、各種顔料、例えば炭酸
カルシウム、酸化チタン、クレーカオリン、水酸化アル
ミニウム、酸化鉄、フタロシアンブルー等に対し高い分
散作用を有する。更に、本発明の水溶性共重合体は前述
したごとく優れた分散作用を有するものであるため、塗
工紙用顔料分散剤としても使用しうる。以下に実施例を
以つて本発明を説明するが、本発明はこれら実施例に限
定されるものではない。As described above, the water-soluble copolymer of the present invention is more effective than conventional pigment dispersants for paints when it is used for various pigments such as calcium carbonate, titanium oxide, clay kaolin, aluminum hydroxide, iron oxide, and phthalocyan blue. It has a high dispersion effect on etc. Furthermore, since the water-soluble copolymer of the present invention has an excellent dispersing effect as described above, it can also be used as a pigment dispersant for coated paper. The present invention will be explained below with reference to Examples, but the present invention is not limited to these Examples.
実施例 １所定量の分散剤および水を加え均一にした溶
液中に、カオリン（ウルトラホワイト９０：エンゲルハ
ルト社製）を、その含有量が７０重量係となるように加
えた後、ホモミキサーＴＫタイプ（特殊機器（株）製）
にて５分間攪拌後、Ｂ型粘度計により見掛け粘度値を測
定した。Example 1 Kaolin (Ultra White 90: manufactured by Engelhard) was added to a solution made homogeneous by adding a predetermined amount of a dispersant and water so that the content was 70% by weight, and then a homomixer TK was added. Type (manufactured by Tokushu Kiki Co., Ltd.)
After stirring for 5 minutes, the apparent viscosity was measured using a B-type viscometer.
結果を表１に示す。尚、分散性及び混和性は粘度によつ
て知りうる。粘度の低いものは分散性及び混和性に優れ
ていることを示している。実施例 ２
所定量の分散剤および水を加え、均一にした溶液中に炭
酸カルシウム（ホワイトンＰ−１０、白石工業製）をそ
の含有量が７５重量係となるよう加えた後、ホモミキサ
ーＴＫタイプにて５分間攪拌後、Ｂ型粘度計により見掛
け粘度値を測定した。The results are shown in Table 1. Note that the dispersibility and miscibility can be determined by the viscosity. Low viscosity indicates excellent dispersibility and miscibility. Example 2 A predetermined amount of dispersant and water were added to a homogeneous solution, and then calcium carbonate (Whiten P-10, manufactured by Shiraishi Kogyo) was added so that the content was 75% by weight. After stirring for 5 minutes using a type B type viscometer, the apparent viscosity value was measured using a B-type viscometer.
結果を表２に示す。実施例 ３
本発明のシクロベンゼン一無水マレイン酸共重合体ナト
リウム塩（モル比１：１、平均分子量４０００）、およ
び比較品のジイソブチレン−無水マレイン酸共重合体ナ
トリウム塩（モル比１：１、平均分子量４０００）を分
散剤として用い、以下に示す配合割合でエマルシヨン塗
料を調製し、Ｂ型粘度計を用いて見掛け粘度値を測定し
た。The results are shown in Table 2. Example 3 Cyclobenzene-maleic anhydride copolymer sodium salt of the present invention (mole ratio 1:1, average molecular weight 4000) and comparative product diisobutylene-maleic anhydride copolymer sodium salt (mole ratio 1:1) , average molecular weight: 4000) as a dispersant, an emulsion paint was prepared at the blending ratio shown below, and the apparent viscosity value was measured using a B-type viscometer.
結果を表２に示す。〈調 製〉
分散剤、水、メチルセルロース水溶液および顔料からな
る混合物を、ＴＫオートホモミキサーＭ型にて４０００
ｒｐｍ１１０分間攪拌した後、酢酸ビニル・アクリル樹
脂エマルシヨンおよびジブチルフタレートを加え、更に
２０００ｒｐｍ１５分間攪拌した。The results are shown in Table 2. <Preparation> A mixture consisting of a dispersant, water, methyl cellulose aqueous solution, and pigment was mixed with a TK autohomogen mixer M type at 4000 mA.
After stirring at 110 rpm for 110 minutes, vinyl acetate/acrylic resin emulsion and dibutyl phthalate were added, followed by further stirring at 2000 rpm for 15 minutes.
Claims (1)
の混合物と無水マレイン酸又は無水イタコン酸あるいは
これらの混合物との水溶性共重合体よりなる塗料用顔料
分散剤。 ２ 水溶性共重合体がアルカリ金属塩又はアンモニウム
塩である特許請求の範囲第１項記載の塗料用顔料分散剤
。 ３ 水溶性共重合体の平均分子量が５００〜１００００
である特許請求の範囲第１項又は第２項記載の塗料用顔
料分散剤。[Scope of Claims] 1. A pigment dispersant for paints comprising a water-soluble copolymer of cyclopentene or cyclohexene or a mixture thereof and maleic anhydride or itaconic anhydride or a mixture thereof. 2. The pigment dispersant for paints according to claim 1, wherein the water-soluble copolymer is an alkali metal salt or an ammonium salt. 3 The average molecular weight of the water-soluble copolymer is 500 to 10,000
A pigment dispersant for paint according to claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54167880A JPS596164B2 (en) | 1979-12-24 | 1979-12-24 | Pigment dispersant for paints |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54167880A JPS596164B2 (en) | 1979-12-24 | 1979-12-24 | Pigment dispersant for paints |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5689829A JPS5689829A (en) | 1981-07-21 |
| JPS596164B2 true JPS596164B2 (en) | 1984-02-09 |
Family
ID=15857787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54167880A Expired JPS596164B2 (en) | 1979-12-24 | 1979-12-24 | Pigment dispersant for paints |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS596164B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6509592B2 (en) * | 2015-03-11 | 2019-05-08 | 花王株式会社 | Carbon black dispersion liquid and carbon black composite resin |
| FR3050733B1 (en) * | 2016-04-27 | 2021-02-12 | Coatex Sas | WATER-SOLUBLE COPOLYMER OF AN ACID AND AN ESTER AND ITS USE AS A DISPERSANT FOR SUSPENSION OF PARTICLES |
-
1979
- 1979-12-24 JP JP54167880A patent/JPS596164B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5689829A (en) | 1981-07-21 |
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