Dow Global Technolgoies LLC

The Dow Chemical Company

Brian G Landes

Francis J Timmers

Timothy Todd Wenzel

Daniel J Arriola

David H Bank

Paul C Vosejpka

Brian A Jazdzewski

Nicole L Wagner

Guenter A Jueptner

Mark F Sonnenschein

Craig J Carriere

Stephen J Nolan

Robert P Brentin

Brian A Jazdazewski

Meta-block copolymers and a process for preparing a product mixture comprising meta-block copolymers by contacting a metathesis catalyst under metathesis conditions with a composition comprising two or more ethylenically unsaturated polymers, said unsaturation defining one or more polymer segments in each ethylenically unsaturated polymer, at least one polymer segment in at least one ethylenically unsaturated polymer being chemically distinguishable from at least one polymer segment in at least one other ethylenically unsaturated polymer, characterized in that each meta-block copolymer in the product mixture comprises a random distribution of said chemically distinguishable polymer blocks.

Production of meta-block copolymers by polymer segment interchange

Two or more chemically distinguishable ethylenically unsaturated polymers, at least one having from 0.001 to 50 mole percent unsaturation and at least one other having an expected Tg or measured Tm value greater than 100&#xb0; C. are cross-metathesized to form thermoplastic elastomers having improved performance properties.

Production of metathesis products by high melting polymer segment interchange

A cross-metathesized product mixture is prepared by contacting a metathesis catalyst under metathesis conditions with a composition comprising two or more chemically distinguishable ethylenically unsaturated polymers, at least one of said ethylenically unsaturated polymers (first polymer) having from 0.001 to 50 mole percent unsaturation and at least one other of said ethylenically unsaturated polymers (second polymer) being an amorphous polymer having a Tg less than 0&#xb0; C. and having from 0.001 to 5 mole percent unsaturation.

Production of metathesis products by amorphous polymer segment interchange

Fibers of syndiotactic vinylaromatic polymers are prepared in an improved process comprising:

Process for the preparation of fibers of syndiotactic vinylaromatic

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Midland, MI, United States of America

Brian G Landes