C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
400/3022, 400/59
C09D 163/00 (2006.01) C08F 283/10 (2006.01)
Patent
CA 1218783
PROCESS FOR PREPARING AQUEOUS COATINGS COMPRISING DISPERSIBLE EPOXY RESIN-ACID POLYMER ESTER ABSTRACT In a method for preparing a coating composition, an ionic polymer component containing sufficient carboxyl groups to render itself dispersible in water in neutralized form is prepared by reacting an epoxy resin containing 1,2-epoxy groups and an addition polymer containing carboxyl groups such that the resultant ionic polymer contains hydroxy ester groups from the reaction of 1,2-epoxy groups on said epoxy resin with carboxyl groups on the preformed addition polymer, and is substantially free of unreacted 1,2-epoxy groups. The ionic polymer component is then dispersed in water with the addition of ammonia or an organic amine neutralizing agent in an amount sufficient to render the composition stably dispersible in water; and an addition polymer different from the addition polymer containing carboxyl groups is incorporated into the aqueous dispersion of said ionic polymer component.
443447
Gowling Lafleur Henderson Llp
Valspar Corporation (the)
LandOfFree
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