Oxidatively crosslinking urethane resins

Details Oxidatively crosslinking urethane resins Oxidatively crosslinking urethane resins

C - Chemistry, Metallurgy

08

G

402/144

C08G 18/12 (2006.01) C08G 18/08 (2006.01) C08G 18/34 (2006.01) C08G 18/36 (2006.01) C08G 18/42 (2006.01) C08G 18/66 (2006.01) C09D 11/10 (2006.01)

Patent

CA 2039902

O.Z. 0062/90006 Abstract of the Disclosure: Oxidatively crosslinking essentially isocyanate-free urethane resins, obtainable by reacting A) 100 parts by weight of an ester of (a1) an aliphatic C3-C8-alcohol having three or more hydroxyl groups and (a2) an unsaturated C3-C40-fatty acid and (a3) if required, an aliphatic or aromatic poly- carboxylic acid of 4 to 20 carbon atoms or an anhydride thereof, in amounts of up to 60% by weight, based on the fatty acid a2), the ester containing sufficient free hydroxyl groups to correspond to an OH number of 50-150 mg of KOH/g, with B) (b1) 3-120 parts by weight of C5-C15-polyhydroxy- carboxylic acids having two or more hydroxyl groups and (b2) 10-100 parts by weight of an aliphatic or cycioaliphatic polyisocyanate or a mixture thereof, at 50-150°C in the presence of a nonpolar solvent which is inert to isocyanates, are suitable for use as printing ink components.

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