Inventors:
Gary P. Craun - Berea OH
Beth A. Smith - Broadview Heights OH
Neal S. Williams - Bracknell, GB
Assignee:
The Glidden Company - Cleveland OH
International Classification:
C08K 320, C08L 3302, C08L 6300, C08L 6302
Abstract:
An aqueous protective coating composition particularly useful for can coatings based on a polymeric binder comprises diepoxide crosslinked microgel particles. The microgel polymer is produced by dispersing into water a carboxyl functional acrylic-epoxy copolymer and combined with a carboxyl functional latex polymer along with a low molecular weight diepoxide, followed by coreaction and crosslinking between the carboxyl polymers and the diepoxide to form stable aqueous dispersed microgel particles. In a preferred aspect of the invention, the carboxyl latex polymer is a swollen latex polymer.