C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
400/1, 402/140,
C25D 13/06 (2006.01) C08G 59/02 (2006.01) C08G 59/56 (2006.01) C08G 59/62 (2006.01) C09D 5/44 (2006.01)
Patent
CA 1237235
Abstract The invention relates to water-dispersible bin- ders which are intended for cationic electropaints and are based on reaction products which are formed from modi- fied epoxy resins and primary and/or secondary amines and which can, if desired, also contain crosslinking agents, pigments, flow-control agents and other customary auxiliaries. They contain as reaction products those which have been prepared by reacting (A) low molecular weight epoxy resins which contain aromatic groups and have an epoxide equivalent weight of less than 375 with (B) aliphatic and/or alicyclic polyfunctional alcohols or carboxylic acids having a molecular weight of less than 350 by addition to the epoxy group in such a way that the reaction products contain 10-45% of aromatic groups, calculated as the phenylene group, and have terminal epoxy groups. (C) reacting the epoxy groups, and thus chain-lengthening, with the phenolic hydroxyl groups of a mononuclear or polynuclear phenol which has at least two phenolic hydroxyl groups and at least one .alpha.,.beta. olefinically unsaturated amidomethyl group of the following gen- eral formula Image as a substituent on the aromatic ring(s) and in which R1 and R2 are identical to or different from one another and represent hydrogen or a methyl group, and (D) reacting the intermediate product obtained from (A), (B) and (C) with a primary or secondary amine or an ammonium salt.
423931
Batzill Wolfgang
Diefenbach Horst
Geist Michael
Schupp Eberhard
Basf Farben + Fasern Aktiengesellschaft
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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