Composition of epoxy polymer, thermoplastic polymer, rubber particles and curing agent
AssigneePPG Industries Ohio, Inc.
InventorsUmesh C. Desai, Anthony C. Palermo
Life of this patent
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Abstract
The present invention provides curable coating compositions including: (a) about 55 to about 99 weight percent of an epoxy-functional polymer containing at least two epoxide groups per molecule; (b) about 1 to about 45 weight percent of a thermoplastic polymer effective to reduce shrinkage of the curable composition upon curing and which is substantially insoluble in the epoxy-functional polymer; (c) about 1 to about 70 weight percent of ground vulcanized rubber particles having an average particle size ranging from about 1 to about 300 microns; (d) a curing agent adapted to cure the epoxy-functional polymer; and, optionally, vinyl chloride polymer.
Claims13
A curable coating composition comprising:
- (a) at least one epoxy-functional polymer containing at least two epoxide groups per molecule present in an amount ranging from about 55 to about 99 weight percent of total resin solids of the coating composition;
- (b) at least one thermoplastic polymer which is substantially insoluble in the epoxy-functional polymer present in an amount ranging from about 1 to about 45 weight percent of total resin solids of the coating composition;
- (c) ground vulcanized rubber particles having an average particle size ranging from about 1 to about 300 microns present in an amount ranging from about 1 to about 70 weight percent of total resin solids of the coating composition;
- and
- (d) a curing agent adapted to cure the epoxy-functional polymer.
Dependencies are inferred from the claim text.