Curing agent-free water based coating composition

Details Curing agent-free water based coating composition Curing agent-free water based coating composition

1992-07-10

1994-09-06

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523412, 524437, 524441, 524443, 524449, C08K 320, C09D16700

Patent

active

053448570

ABSTRACT:
A water based coating composition which has excellent shelf stability and can be cured by ordinary baking in the absence of a sulfonic acid-containing acid catalyst and which gives a coating having excellent adhesion and excellent water resistance. The water based coating composition can be obtained by dissolving or dispersing
50 to 80% by weight, as a solid content, of a water-soluble polyester resin prepared by polycondensing a carboxylic acid component containing 10 to 60 mol % of a polycarboxylic acid having 3 to 4 carboxyl groups per molecule and 40 to 90 mol % of a dicarboxylic acid and 1.1 to 2.0 mol, per mole of the carboxylic acid component, of a glycol component, to obtain a polyester resin having a free carboxyl group, and dissolving the polyester resin in water in the presence of a base,
5 to 20% by weight, as a solid content, of a water based bisphenol type epoxy resin, and
15 to 45% by weight, as a solid content of an alkyl-etherified amino resin, in an aqueous medium.

REFERENCES:
patent: 4997865 (1991-03-01), Scherping et al.

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