Process for the preparation of cationic coating compositions

Details Process for the preparation of cationic coating compositions Process for the preparation of cationic coating compositions

C - Chemistry, Metallurgy

08

G

402/279, 402/44

C08G 59/14 (2006.01) C08G 59/38 (2006.01) C08G 59/42 (2006.01) C08G 59/58 (2006.01) C09D 5/44 (2006.01) C09D 163/00 (2006.01)

Patent

CA 1283994

A B S T R A C T PROCESS FOR CATIONIC COATING COMPOSITIONS A process for the preparation of water-thinnable, hydrolytically stable, thermosetting, cationic coating compositions, which comprises blending: 1) 5-35 %w of a carboxylated crosslinking compound, and 2) 65-95 %w of an amino group-containing resin binder, which binder comprises the reaction product of a) ammonia, and b) a blend of b1) a polyglycidyl ether having n epoxy groups per molecule, wherein 1<n<1.9, said polyglycidyl ether being the reaction product of a multifunctional polyglycidyl ether having x epoxy groups per molecule, wherein x>2, and (x-n) mol of a monofunct- ional phenol per mol of the multifunctional polyglycidyl ether, and b2) a diglycidyl ether having an epoxy group concentration in the range of from 1 to 5.5 the average molar epoxy functionality of the glycidyl ethers, present in the blend of polyglycidyl ether and diglycidyl ethers, being <1.75. and wherein 1) and 2) are blended before or after neutral- ization of 2).

538717

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