Rohm and Haas Company

Constance A Lane

R Peter Grant

John P Leslie

Dennis Paul Lorah

Travis E Stevens

Thomas Glenn Madle

Albert Benner Brown

William H Harrop

Paul H Gehlhaus

Joseph C Koziar

Ted Tysak

Disclosed herein are core-shell polymers having an alkali-insoluble, emulsion polymer core and an alkali-soluble, emulsion polymer shell attached or associated with said core so that upon dissolving said shell with alkali, a portion of said shell remains attached or associated with said core. Also disclosed are compositions wherein said shell polymer has been neutralized and substantially, but not totally, dissolved so as to form a blend of neutralized core-shell polymer and an aqueous solution of neutralized shell polymer.

Polymers comprising alkali-insoluble core/alkali-soluble shell and

Composition and method for improving the thermoplastic processing characteristics of poly(ethylene terephthalate) (PET) in amorphous form are disclosed, as well as PET with improved melt strength.

Melt strength improvement of PET

Composition and method for improving the thermoplastic processing characteristics of poly(ethylene terephthalate) (PET) in amphorous form are disclosed, as well as PET with improved melt strength.

Compositions comprising linear saturated aromatic polyesters with a minor amount of a moisture scavenger polymer containing cyclic acetal or cyclic ketal units, process for preventing hydrolytic degradation of such polyesters comprising introducing such moisture scavenger polymers, and process of using certain polymers containing cyclic acetal or cyclic units as moisture scavengers for linear saturated aromatic polyesters.

Process for preventing hydrolytic degradation of linear saturated

A multiple stage polymer having a rubbery first stage and an epoxy functional hard final stage, a method for improving the notched Izod impact strength and melt strength of poly(alkylene terephthalates), compositions comprising poly(alkylene terephthalates) and the multiple stage polymer, and articles molded therefrom are disclosed.

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Philadelphia, PA, United States of America

Constance A Lane