Cathodically depositable binders (1)

Details Cathodically depositable binders (1) Cathodically depositable binders (1)

C - Chemistry, Metallurgy

09

D

400/5123

C09D 5/44 (2006.01)

Patent

CA 1111593

ABSTRACT OF THE DISCLOSURE Aqueous emulsions of binders for cathodically depositable aqueous coating compositions comprising emulsions of 10 to 99. 9 percent by weight of a self-crosslinking polycondensation resin or polymerization resin, and 0.1 to 90 percent by weight of one or more basic urethane component which is the reaction product of (A) 1 mole of polyisocyanate with (B) at least 1 mole dialkylalkanolamine and a monohydroxyalkyl(meth)- acrylate and/or a monohydroxyalkoxy(meth)acrylate and/or a monohydroxy- allylether of a polyol. Component (B) which optionally can include a sa- turated and/or unsaturated fatty alcohol or fatty acid will have an NCO- value of substantially zero. The basic content of the emulsion is at least 0. 5, and the double bond number is at least 0. 5. The emulsions have excellent stability without use of additional emulsifiers and films obtained from coating compositions containing the emulsions have good adhesion characteristics, cure at relatively low temperatures and relatively short curing times to provide films having excellent resistance to water, chemi- cals, and corrosion. - 2 -

296441

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