Cathodically precipitable aqueous electro-dipcoating agent

Details Cathodically precipitable aqueous electro-dipcoating agent Cathodically precipitable aqueous electro-dipcoating agent

C - Chemistry, Metallurgy

09

D

400/5503, 400/74

C09D 5/44 (2006.01) C08G 18/08 (2006.01) C08G 18/83 (2006.01) C09D 175/12 (2006.01)

Patent

CA 1262393

A B S T R A C T A cathodically precipitable aqueous electro-diproating agent which includes as Component A, 50 to 99% by mass relative to the total quantity of Components A and B) of a synthetic resin binder having tertiary amino groups and hydroxyl groups which can be rendered water soluble by protonation with acids, and which (a) has an amine number of 35 to 120. (b) has a hydroxyl number of 50 to 400, (c) has substantially no primary, secondary and quarternary amino groups, (d) has substantially no free isocyanate groups, and (e) has substantially no blocked isocyante groups which can react at baking temperatures of up to 200°C with hydroxyl groups present in the reaction components. The agent also includes as Component B, 1 to 50% by mass (rela- tive to the total quantity of Components A and B) of substantial- ly non-acid synthetic resins having at least two terminal esteri- fied carboxyl groups which can react under normal lacquer baking conditions with Component A, accompanied by cross-linkage.

463488

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