Shell Oil Comapny

The Goodyear & Tire Rubber Company

Joseph P Schirmer

William C Tung

Douglas D Callander

William George Perkins

Patrick J Pesata, Jr

Brian W Pengilly

Terence E Winters

Roy M Broughton, Jr

Nathan Lyle Pazzo

A polyester resin is disclosed containing graphite in sufficient quantities to reduce its infrared heat up time in the reheat-blow process. The amount of graphite added is from 0.1 to 15 ppm and the average particle size is from 0.1 to 20 microns. The polyester is useful to make bottle preforms for beverage containers. Methods of making the polyester resin are also disclosed using a masterbatch or liquid slurry addition technique.

Fast heatup polyesters using graphite as an additive

Polyester blends of polyethylene terephthalate and polyethylene isophthalate coated with an alkylene carbonate such as ethylene carbonate or propylene carbonate crystallize more quickly and at lower temperature than uncoated pellets, reducing the tendency of the pellets to stick together during the crystallization process prior to solid-state polymerization.

Process for crystallizing blends of polyethylene terephthalate and

A process for reducing the glycol ether content in polyesters involves adding a glycol to a polyester oligomer solution prior to polymerization, distilling the oligomer solution to remove vapor containing the glycol as well as the glycol ether, and polymerizing the solution to produce a polyester containing a reduced glycol ether content.

Reduction of glycol ethers in polyesters

Growing community of inventors

Akron, OH, United States of America

Joseph P Schirmer