Compositions comprising ionic resins and capped...

Details Compositions comprising ionic resins and capped... Compositions comprising ionic resins and capped...

C - Chemistry, Metallurgy

08

G

400/7410, 400/79

C08G 18/08 (2006.01) C08G 18/64 (2006.01) C08G 18/76 (2006.01) C08G 18/80 (2006.01) C09D 5/44 (2006.01)

Patent

CA 1308214

Abstract of the Disclosure Curable electrocoating compositions and the use of these compositions in a method of electrodeposition are disclosed. The electrocoating compositions comprise an aqueous dispersion of an active hydrogen-containing ionic resin and a capped polyisocyanate in which the polyisocyanate comprises a mixture of a diphenyl-2,4'- diisocyanate, a diphenyl-4,4'-diisocyanate and optionally polyphenyl polyisocyanate in which the diphenyl-2,4'-diisocyanate comprises at least 5 percent by weight of a polyisocyanate mixture. The capped polyisocyanate mixture results in a more stable aqueous dispersion than comparable dispersions prepared with capped polyisocyanates derived from the more common diphenyl-4,4'-diisocyanate and mixtures of diphenyl-4,4'-diisocyanate with polyphenyl polyisocyanate.

529499

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