Exxonmobil Chemical Patents Inc.

Celanese International Corporation

Peite Bao

Yi Ping Ni

Eric Paul Jourdain

Toshiaki Yamaguchi

Li Liang

Weiqian Zhang

Wanli Wang

Michael W Bednarik

Ying Ying Sun

The present disclosure relates to TPV compositions suitable for foaming, as well as foamed TPV compositions, methods of making the foregoing, and applications of various foamed TPV compositions, including in glass run channels. The TPV compositions comprise an at least partially vulcanized rubber component dispersed within a thermoplastic component comprising a first thermoplastic resin. According to some aspects, the TPV composition may be combined with a high melt-strength thermoplastic resin, and in particular a high melt-strength polypropylene-based thermoplastic resin, to make a foamable TPV composition. The foamable TPV composition (with or without high melt-strength thermoplastic resin) is then coextruded or otherwise combined with foaming agent (preferably comprising thermo-expandable microspheres) to form the foamed composition. Foamed compositions according to various aspects are suitable for use in glass run channels for automobiles, and in particular in the base and/or sidewall portions of such glass run channels.

Low density foamed thermoplastic vulcanizate compositions

A process of heat shrinking an article is provided. The process includes shaping a thermoplastic vulcanizate (TPV) into an article, the TPV having: a partially vulcanized rubber dispersed in a continuous thermoplastic phase, wherein more than 5 wt % of the rubber is extractable in boiling xylene, and wherein the thermoplastic phase comprises a thermoplastic resin having a Tm&#x3e;110&#xb0; C. and a propylene-based elastomer (PBE) having a Tm&#x3c;110&#xb0; C.; and heating the article to a temperature between about 100&#xb0; C. and 250&#xb0; C. to shrink the article.

Shrinkable thermoplastic vulcanizate and method and article

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Houston, TX, United States of America

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