Copolymers which contain hydroxyl groups and a method of produci

Details Copolymers which contain hydroxyl groups and a method of produci Copolymers which contain hydroxyl groups and a method of produci

1998-01-29

2000-12-19

Wu, David W.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 79, 526266, 526318, 52631845, 5253295, 5253297, 5253301, C08F 2026, C08F 2010, C08F 2400, C08F12000, C08F 2000

Patent

active

061628867

ABSTRACT:
This invention relates to copolymers which contain hydroxyl groups and which are based on vinyl esters of monocarboxylic acids, wherein the copolymers which contain hydroxyl groups have an OH number of 110-170 mg KOH/g, an acid number of 5-35 mg KOH/g and a number average molecular weight M.sub.n of 1500-8000 g/mole and are obtainable by the polymerisation of A) 5-20% by weight of one or more vinyl esters of saturated monocarboxylic acids, B) 10-30% by weight of one or more aromatic vinyl hydrocarbons, C) 41-55% by weight of hydroxy-functional, polymerisable, unsaturated monomers, and D) 0-40% by weight of further polymerisable, unsaturated monomers, wherein component C) contains C1) 40-70% by weight of one or more hydroxyalkyl esters of .alpha.,.beta.-unsaturated monocarboxylic acids, C2) 1-10% by weight of one or more lactones, and C3) 30-55% by weight of one or more reaction products of an .alpha.,.beta.-unsaturated monocarboxylic acid with a glycidyl ester of a saturated .alpha.,.alpha.-dialkylalkane-monocarboxylic acid or of a saturated .alpha.-alkylalkane-monocarboxylic acid, and the sum of components A) to D) and the sum of components C1) to C3) add up to 100% by weight in each case.

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