The Dow Chemical Company

Dow Global Technolgoies LLC

Dow Global Technology Inc.

Dow Deutschland Inc.

Jerry L Hahnfeld

Stephen F Hahn

Gary D Parsons

Mary Ann Jones

Chau Van Vo

William C Pike

Alan E Platt

David A Habermann

Rajen M Patel

Duane B Priddy, Sr

Lu H Tung

Frank Steven Bates

Thomas H Newman

Glenn H Fredrickson

Daniel D Imeokparia

Andrew N Paquet

Calvin P Esneault

Robert J Donald

Donald E Kirkpatrick

Avani Maulik Patel

James E Pate, Iii

John W Lyons

Charles A Berglund

Felix Achille

Cora M Leibig

Jason Q Niu

James H Sedon

Laura M Phipps

Chin Chu

George A Mackey

Timothy G Bee

Craig H Silvis

Compositions comprising hydrogenated block copolymers can be successfully used in a variety of applications including films, profiles, sheets, pultruded articles, fibers, coated articles, injection molded articles and blow or rotational molded articles.

Compositions comprising hydrogenated block copolymers and end-use applications thereof

The present invention relates to hydrogenated block copolymers of vinyl aromatic polymer blocks and conjugated diene polymer blocks having specific total Mn and specific block Mn's such that advantageous properties are attained. The present invention also relates to hydrogenated pentablock copolymers thereof and specifically hydrogenated pentablock copolymers useful in thin walled injection molding applications.

Hydrogenated block copolymer compositions

The present invention is directed to a process for producing a hydrogenated polymer or copolymer by hydrogenating prior to polymer isolation or finishing.

Process for preparing hydrogenated aromatic polymers

The present invention is directed to a hydrogenated block copolymer of a vinyl aromatic and butadiene which is useful in the preparation of optical media discs having very low birefringence.

Hydrogenated block copolymers and optical media discs produced therefrom

The present invention is directed to a composition comprising a hydrogenated block copolymer of a vinyl aromatic and conjugated diene polymer, having a lamellar morphology and high aromatic hydrogenation level.

The present invention is directed to a hydrogenated copolymer of a vinyl aromatic and isoprene monomer which produces optical media discs having extremely low birefringence.

The present invention is directed to a hydrogenated copolymer of a vinyl aromatic and conjugated diene monomer which produces optical media discs having extremely low birefringence.

This invention provides a thermoplastic polymer foam having a density of up to 800 kg/m,. The foam is made from a hydrogenated vinyl aromatic polymer that contains pendant cycloaliphatic groups. This polymer is conveniently made by hydrogenating a poly(vinyl aromatic) polymer such as polystyrene or a polystyrene-butadiene block copolymer. A suitable blowing agent is a mixture comprising (a) one or more fluorine-containing carbon compounds and (b) carbon dioxide, nitrogen, an alcohol having from 1 to 4 carbon atoms, a linear or cyclic hydrocarbon having from 1 to 6 carbon atoms, a ketone, an alkyl ether, an alkyl halide, water or a mixture thereof.

Hydrogenated vinyl aromatic polymer foams

A process for producing a branched polymer from a vinyl aromatic monomer comprising:

Preparation of branched polymers from vinyl aromatic monomer

Disclosed is an extruded, linear, bimodal monovinyl aromatic polymer foam having a weight average molecular weight of from about 100,000 to about 200,000, greater than 5 percent by weight of its polymer chains having a weight average molecular weight of 500,000 to 1,000,000, and less than 5 percent by weight of its polymer chains having a weight average molecular weight of greater than 1,000,000. Use of the polymer enables process pressure drop to be significantly reduced and allows the formation of a foam of lower density and larger cross-section. Further disclosed is a process for making the extruded foam.

Extruded foams having a monovinyl aromatic polymer with a broad

An improved process for forming hydroperoxide derivatives of rubbery polymers. The hydroperoxide derivatives being particularly well suited for use as intermediates in forming graft rubbery polymers. The process involves dissolving a rubbery polymer in a monomer mixture and adding to the rubbery polymer/monomer mixture a photosensitizing agent. The rubbery polymer-monomer mixture is then oxygenated and exposed to light under conditions wherein triplet oxygen is converted to singlet oxygen. The improvement comprises adding to the rubbery polymer/monomer mixture a solvent capable of solubilizing the photosensitizing agent in the rubbery polymer/monomer mixutre. The solubilizer increases the yield of hydroperoxide derivatives of rubbery polymers formed by a factor of 3.

Method for the preparation of hydroperoxide derivatives of rubbery

A rubber-modified polymeric composition is disclosed. The rubber-modifying component comprises a grafted rubbery polymer, said grafted rubbery polymer being formed by a process, the steps of the process involving the formation of a hydroperoxidized rubbery polymer intermediate.

Rubber modified styrenic polymer compositions formed from hydroperoxide

A polymer resin comprising a blend of an olefin polymer, such as polyethylene, a monovinylidene aromatic polymer, such as polystyrene, and a grafted, block copolymer compatibilizing agent. The compatibilizing agent comprises an .alpha.-olefin copolymer substrate grafted with amounts of monovinylidene aromatic polymer. Preferably, the .alpha.-olefin copolymer substrate is a terpolymer of ethylene, propylene and a non-conjugated diolefin. This thermoplastic material has very desirable property combinations, combining the desirable properties from the olefinic and monovinylidene aromatic polymers. The blend can be shaped into final products by thermoforming techniques yet possesses many desirable polyolefin properties such as environmental stress crack resistance.

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Midland, MI, United States of America

Jerry L Hahnfeld