The Goodyear & Tire Rubber Company

Paul L Heater

William C Tung

Nelson C Bletso

A blend of about an equivalent of a carboxyl terminated polyester having a carboxyl end group equivalent weight of 900 to 1200 with 0.8 to 1.2 equivalents of an epoxy curing agent having an equivalent weight of about 70 to 1000, 0 to 50% by weight of a copolyester melt adhesive and sufficient powdered metal to make 20 to 70% but preferably about 30 to 50% metal by weight based on recipe without the copolyester melt adhesive.

Crosslinkable polyester body solder of powdered metal

A body solder composed of a blend of 20 to 70 percent by weight of powdered aluminum in a thermoplastic polyester having a melting point of 200.degree. to 220.degree. C. The preferred solders have powdered aluminum with a particle size of from 0.2 to 150 microns and the polyester contains dimerates.

Body solder of powdered aluminum and a polyester

A copolyester resin having modified carboxyl terminated ends is disclosed, as well as the method for making and using that compound with epoxide curing compounds in powder coating resins for substrates. The polymerization of the copolyester resin contains a reactor compounding stage which permits the reaction of the carboxyl termini with a curing reaction catalyst prior to any compounding or mixing of the modified copolyester resin with the epoxide curing compounds. The modification to these end groups of the copolyester resin creates activated termini which, although stable of themselves, react more rapidly, when the modified copolyester resin is compounded with the epoxide curing compounds and subsequently heated on the substrate, than with the conventional introduction of the epoxide catalyst during final compounding. Alteration of the curing parameters of the modified copolyester resin with the epoxide curing compounds imparts greater impact strength and better leveling properties at temperatures between 300.degree. F. and 450.degree. F.

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Massillon, OH, United States of America

Paul L Heater