Heat hardenable cationic water dilutable binders

Details Heat hardenable cationic water dilutable binders Heat hardenable cationic water dilutable binders

C - Chemistry, Metallurgy

08

K

402/2, 402/297,

C08K 5/11 (2006.01) C08J 3/24 (2006.01) C08K 5/20 (2006.01) C09D 5/44 (2006.01)

Patent

CA 1193786

ABSTRACT OF DISCLOSURE Cationic heat-hardenable binders comprising polymers containing amine groups and 3 crosslinking component which is film-forming with the amine group containing polymer through transesterification at elevated temperatures are described. The binders which are water-dilutable upon protonization of the amine groups comprise (a) 60 to 95% by weight of a polymer having a hydroxyl value of from 40 to 450 mg KOH/g and an amine value of from 20 to 150 mg KOH/g, water-soluble or water-dilutable upon protonation of the basic groups, and (b) 5 to 40% by weight of a cross-linking component of the general formula - Image n having a value of from 1 through 5, R1 being the moiety of a monoalcohol having from 1 to 8 C-atoms, or of a polyol, a polyamine, a polyepoxy compound or a polyisocyanate remaining after reaction with one or more carboxylic acid groups, and R2 being a straight chain or branched alkyl radical with from 1 to 8 C-atoms. The binders have excellent characteristics particularly when de- posited from an electrodeposition system.

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