C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
400/5123
C09D 5/44 (2006.01)
Patent
CA 1263981
Abstract of the Disclosure: binders for cathodic electrocoating which are based on polyadducts/poly- condensates which carry basic nitrogen groups and are rendered water-dilutable by protonation with an acid, and one or more crosslinking agents for these polyadducts/ polycondensates, and their use. These binders essentially consist of a mixture of (A) from 50 to 90% by weight of a polyadduct/polycon- densate which carries basic nitrogen groups and is obtainable by reacting (a) an adduct of a secondary amine and a polyepoxide compound, the adduct still containing free epoxide groups, with (b) a condensate which contains primary amino groups and is obtained from a primary diamine of not less than 4 carbon atoms and one or more mono- and/or dicarboxylic acids, one or more primary amino groups of the condensate (b) being used per free epoxide group of the adduct (a), and (B) from 10 to 50% by weight of a crosslinking agent which does not react with component (A) at room tem- perature but reacts with the latter at elevated tem- peratures with crosslinking. The binders are useful for the cathodic electro- coating of electrically conductive substrates and as coating materials.
522968
Ahlers Klass
Loch Werner
Osterloh Rolf
Schupp Eberhard
Ahlers Klass
Basf Lacke + Farben Aktiengesellschaft
Loch Werner
Osterloh Rolf
Robic Robic & Associes/associates
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