Aqueous dispersed acrylic-epoxy, branched epoxy protective coati

Details Aqueous dispersed acrylic-epoxy, branched epoxy protective coati Aqueous dispersed acrylic-epoxy, branched epoxy protective coati

1997-07-18

1999-08-24

Dawson, Robert

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523407, 523409, C08K 320, C08L 6302

Patent

active

059425636

ABSTRACT:
An aqueous protective coating composition particularly useful for can coatings is based on a polymeric binder comprising epoxy crosslinked microgel particles. The microgel polymer is produced by dispersing into water a carboxyl functional, acrylic-epoxy grafted copolymer, and combined with a high molecular weight, branched, multifunctional epoxide resin, followed by coreaction and crosslinking between the carboxyl copolymer and branched epoxide to form stable aqueous dispersed microgel particles. In a preferred aspect of the invention, low molecular weight liquid diepoxide is dispersed into and crosslinked with the carboxyl functional acrylic grafted epoxy copolymer.

REFERENCES:
patent: 4474929 (1984-10-01), Schrader
patent: 5508325 (1996-04-01), Craun et al.

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