C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 167/00 (2006.01) C09D 161/20 (2006.01)
Patent
CA 2171577
Heat-curable coating materials for the formation of hard and flexible coatings on metal objects having the composition A) 10 - 50 wt.% of polyesters consisting of a) aromatic and aliphatic and/or cycloaliphatic polycarboxylic acids, wherein of the polycarboxylic acids aa) 40 - 90 mol-% are aromatic polycarboxylic acids and bb) 60 - 10 mol-% are aliphatic and/or cycloaliphatic polycarboxylic acids, on condition that, when dicarboxylic acids are used, at least 50 mol-% of the dicarboxylic acids used are cyclic dicarboxylic acids, with b) polyols, wherein of the polyols aa) 30 - 85 mol-% is neopentyl glycol and bb) > 15 - < 50 mol-% is 1,3-propanediol, on condition that, when diols are used, at least 30 mol-% of the diols used possess aliphatic side chains, wherein the quantity of components a) and b) must satisfy the following equation X = Image wherein n1 signifies the number of moles of polyols b), n2 signifies the number of moles of polycarboxylic acids a) and F signifies the average value of the molar functionality of the polycarboxylic acids and X has a value between 1.05 and 1.5; B) 5 - 40 wt.% of cross-linking agents C) 15 - 50 wt.% of solvents and optionally D) pigments and E) conventional additives.
Degussa Ag
Marks & Clerk
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