3m Innovative Properties Company

Dyneon Gmbh

Karl-Dieter Weilandt

Klaus Hintzer

Harald Kaspar

Erik Peters

Lisa P Chen

Maria P Dillon

Bernhard Hirsch

Jost Krichel

James Stephen Mrozinski

Stephen E Amos

Jonathan F Hester

Peter J Scott

Susan S Woods

Kirsten J Fronek

Claude Lavall&eacute;e

Randall P Swenson

Microporous material having a spherulitic matrix made from ethylene chlorotrifluoroethylene copolymer has a plurality of pores having an average pore size greater than about 0.01 micrometer. The material is made by thermally induced phase separation (TIPS) process that includes melt mixing ethylene chlorotrifluoroethylene copolymer, diluent and nucleating agent to provide a melt mixed composition; shaping the melt mixed composition; cooling the shaped melt mixed composition to induce phase separation of the ethylene chlorotrifluoroethylene copolymer to provide a phase separated material; and stretching the phase separated material to provide the microporous material. The microporous material may be incorporated into articles and the articles may include one, two or more layers of microporous material.

Microporous material from ethylene-chlorotrifluoroethylene copolymer and method for making same

The present invention provides a method of making a fluoropolymer comprising repeating units derived from one or more gaseous fluorinated monomers. The method comprises an aqueous emulsion polymerization of gaseous fluorinated monomers in the presence of an ether selected from the group consisting of dimethyl ether (DME), methyl tertiary butyl ether (MTBE) and mixtures thereof.

Aqueous emulsion polymerization in the presence of ethers as chain transfer agents to produce fluoropolymers

The present invention relates to a method of foaming a polymer comprising the steps of providing a composition comprising said polymer and a zeolite in an amount of 0.3% or more based on the weight of said polymer and extruding said composition. The invention further relates to foamed articles and to the use of zeolites as foaming agents in the foaming of polymers.

Method of foaming a polymer composition using zeolite and foamed articles so made

A polymer processing aid composition, a melt processable polymer composition that uses the polymer processing aid, and a method of improving the melt processability of a thermoplastic polymer are provided. The polymer processing aid composition comprises a fluoropolymer that comprises interpolymerized units derived from a perfluorovinyl ether, preferably one having the formula CF &boxH;CF&mdash;(OCF CF(CF )) OR where a has a value of 0 to 3 and R is a perfluoroaliphatic (preferably perfluoroalkyl or perfluoroalkoxy) having from 1 to 8 (preferably 1 to 3) carbon atoms.

Polymer processing additive containing a perfluorovinylether-modified flouropolymer and a melt processable thermoplastic polymer composition employing the same

A polymer processing aid composition, a melt processable polymer composition that uses the polymer processing aid, and a method of improving the melt processability of a thermoplastic polymer are provided. The polymer processing aid composition comprises a multimodal fluoropolymer that preferably comprises interpolymerized units derived from an ethylenically unsaturated fluoromonomer tetrafluoroethylene and at least one ethylenically copolymerizable alpha-olefin monomer.

Polymer processing additive containing a multimodal fluoropolymer and melt processable thermoplastic polymer composition employing the same

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Minneapolis, MN, United States of America

Karl-Dieter Weilandt