A pigment grinding resin of the formula: ##STR1## wherein, Ep is a residue of an epoxy resin having an epoxy equivalent of 150 to 2000 and a hydroxyl group equivalent of 300 to 4000; R.sup.1 represents a hydrophilic group selected from a 2-hydroxyethyl group and a group of the formula --CH.sub.2 CH(OH)CH.sub.2 R.sup.3 wherein, R.sup.3 is a hydroxyl group or a hydroxylalkyl group having 1 to 10 carbon atoms; R.sup.2 represents a hydrophilic group selected from 3-hydroxypropyl, 2-hydroxypropyl and 4-hydroxybutyl; R.sup.4 is a hydrogen atom or an alkyl, hydroxylalkyl or alkylamide group having 1 to 5 carbon atoms; m is a numerical value of 0.1 to 2.0; A is residue of a diisocyanate; B is a residue of an alcohol, an amine, a carboxylic acid, an oxime and a caprolactam having 1 to 20 carbon atoms; and n is a numerical value of 10.1 to 2.0. The pigment grinding resin of the present invention has excellent dispersibility. This invention provides a pigment grinding resin and pigment paste capable of affording a coated film having good appearance and corrosion resistance.
一种
颜料研磨
树脂的
化学式为:##STR1## 其中,Ep是具有150至2000环氧当量和300至4000羟基当量的环氧
树脂残基; R1代表选择自2-羟乙基基团和式为--CH2CH(OH)CH2R3的亲
水基团,其中,R3是具有1至10个碳原子的羟基或羟基烷基基团; R2代表选择自3-羟基丙基、2-羟基丙基和
4-羟基丁基的亲
水基团; R4是氢原子或具有1至5个碳原子的烷基、羟基烷基或烷基酰胺基团; m是0.1至2.0的数值; A是二
异氰酸酯的残基; B是具有1至20个碳原子的醇、胺、
羧酸、
肟和己内酰胺的残基; n是10.1至2.0的数值。本发明的
颜料研磨
树脂具有优异的分散性。本发明提供了一种能够提供具有良好外观和耐腐蚀性的涂层膜的
颜料研磨
树脂和
颜料浆料。