Celanese Gmbh

Melvin L Druin

Shau-Zou Lu

John S Gall

Kenneth Oringer

Nucleating agents have been discovered which enable molded articles to be prepared with smooth glossy surfaces from blends of polyethylene terephthalate and polybutylene terephthalate in the 'wet state', i.e., without the resin having been subjected to a predrying stage. The present invention is directed to polyalkylene terephthalate resin compositions. Specifically, it is directed to undried blends of polyethylene terephthalate and polybutylene terephthalate resins with nucleating agents which enable these resin blends to be molded into articles with smooth glossy surfaces. In a preferred embodiment fillers and/or reinforcing materials are added without subjecting the resin to a predrying treatment which has been heretofore necessary in the prior art.

Polyester blends

Nucleating agents have been discovered which enable molded articles to be prepared with smooth glossy surfaces from blends of polyethylene terephthalate and polybutylene terephthalate in the 'wet state', i.e., without the resin having been subjected to a predrying stage. The present invention is directed to polyalkylene terephthalate resin compositions. Specifically, it is directed to undried blends of polyethylene terephthalate and polybutylene terephthalate resins with nucleating agents which enable these resin blends to be molded into articles with smooth glossy surfaces. In a preferred embodiment, fillers and/or reinforcing materials are added without subjecting the resin to a predrying treatment which has been heretofore necessary in the prior art.

An improved thermoplastic nylon molding resin comprising intimately mixed nylon molding resin and glass reinforcing agents in the presence of polyethylene terephthalate resin.

Glass fiber-reinforced polyethylene terephthalate/polyamide blends

A process for the purification of crude 3,3'-diaminobenzidine comprising contacting it with sulfuric acid. The 3,3'-diaminobenzidine can be produced by the reaction of NH.sub.3 and 3,3'-dichlorobenzidine in the presence of various catalysts.

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West Orange, NJ, United States of America

Melvin L Druin