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US 6,476,111 B1Granted
Extrudable highly filled thermoplastic sheet composition
AssigneeE. I. Du Pont de Nemours and Company
InventorsPaul Edward Beauchemin, Barry Jordan Heitner, Clyde Spencer Hutchins, Keith William Pollak, Jennifer Leigh Thompson
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Abstract
A highly filled, extruded solid surface sheet composite which has improved heat resistance, solvent resistance, and mar resistance by combination of glassy polymer and semi-crystalline polymer.
Claims14
An extrudable molding composition, comprising by weight based on components (a) to (d):
- (a) 20-65% glassy polymer;
- and
- (b) 5-35% semi-crystalline polymer;
- and
- (c) 0-10% compatibilizing agent for said glassy and said semi-crystalline polymer;
- and
- (d) 10-70% particulate mineral filler;.
- wherein the ratio of said glassy polymer to said semi-crystalline polymer is in a range from 4/1 to 3/2;
- said glassy polymer has a glass transition
- temperature of at least 25° C. and is an acrylic polymer;
- said semi-crystalline polymer has a melt
- temperature of at least 65° C. and is a polyester polymer.
9 more elements
An extrudable molding composition, comprising by weight based on components (a) to (d):
- (a) 20-65% glassy polymer;
- and
- (b) 5-35% semi-crystalline polymer;
- and
- (c) 0-10% compatibilizing agent for said glassy and said semi-crystalline polymer;
- and
- (d) 10-70% particulate mineral filler;
- wherein the ratio of said glassy polymer to said semi-crystalline polymer is in a range from 4/1 to 3/2;
- said glassy polymer has a glass transition temperature of at least 25° C. and is an acrylic polymer;
- said semi-crystalline polymer has a melt temperature of at least 65° C. and is a polyamide polymer.
7 more elements
Dependencies are inferred from the claim text.