Shell Oil Comapny

Kraton Polymers U.S. LLC

Milliken + Co

Kraton Polymers LLC

David Romme Hansen

David J St Clair

James R Erickson

Steven H Dillman

Robert Charles Bening

Michael A Masse

Lydia Ann Salazar

Paul A Mancinelli

Glenn R Himes

Donn Anthony Dubois

David Lee Shafer

Carl Lesley Willis

Dale Lee Handlin, Jr

Ronald J Hoxmeier

Nathan A Mehl

Jeffrey G Southwick

Steven S Chin

William H Korcz

Daniel M Connor

Ruidong Ding

Larry McArthur Kegley

Geoffrey Holden

Robert A Tait

George T Coker, Jr

Ralf Korpman

Daniel Connor

The present invention comprises a molding composition comprising at least about 70% wt. polypropylene or polypropylene random copolymer; up to about 30 wt. % of a block copolymer composition comprising at least one selectively hydrogenated block copolymer which substantially matches the index of refraction of the polypropylene or polypropylene random copolymer, and up to about 0.70% by wt. of a clarifying agent, wherein the weight % of the total blend is 100%. The present invention also may be a molded article produced from the molding composition. A molded article formed from such a composition at a thickness of 0.125 inches will have a haze of less than about 50% and an instrumented impact toughness of at least 100 inch-lbs at &#x2212;20&#xb0; C. to &#x2212;30&#xb0; C.

Hydrogenated styrenic block copolymers blends with polypropylene

The present invention relates to photocurable compositions for use in flexographic printing plates comprising selectively hydrogenated block copolymers of conjugated dienes and monoalkenyl arenes and flexographic printing plates made from the same. The block copolymers, either linear or radial, have terminal blocks of unsaturated conjugated diene. The block copolymer is further comprised of monoalkenyl arene blocks and hydrogenated conjugated diene blocks. The compositions exhibit exceptional improvement in degree of cure over comparative selectively hydrogenated block copolymers.

Photocurable compositions and flexographic printing plates comprising the same

The present invention relates to a photopolymerizable composition, which comprises: The invention also includes flexographic printing plates derived from said photopolymerizable compositions, and flexographic printing relief forms prepared from said plates.

Photopolymerizable compositions and flexographic plates prepared from controlled distribution block copolymers

Die cuttable label adhesive formulation

An adhesive formulation is provided comprising an elastomeric block copolymer having a midblock segment derived from polymerized diene monomer and at least two endblock segments derived from polymerized monovinyl substituted aromatic compound monomer, a midblock compatible tackifier, a midblock compatible oil, and endblock compatible resin and an antioxidant. The block copolymer can be either an unhydrogenated polymer having terminal endblocks with a molecular weight within the range of 13,000 to 30,000 or it can be a hydrogenated copolymer having terminal endblocks with a molecular weight of 11,000 to 20,000. The presence of roughly high molecular weight endblock segments results in an adhesive composition having superior (lower) stress relaxation and set.

Low stress relaxation adhesive having high molecular weight endblock copolymer

Formulation for strippable adhesive and coating films and high performance adhesive

It has been surprisingly found that certain properties including adhesion strength to smooth surfaces may be improved by making hot melt adhesives from blends comprising a poly-1-butene polymer, a tackifier resin, and from 3 wt. % to 25 wt. % of a liquid or semi-liquid, hydrogenated or partially hydrogenated low molecular weight conjugated diene polymer prepared by anionic polymerization. Any one of the following three polymers can be used in the adhesive formulation of this invention: 1) a hydrogenated styrene isoprene diblock copolymer having a number average molecular weight from 4000 to 30,000, preferably 6000 to 15,000, a polystyrene content of 5 to 15 percent by weight, preferably 8 to 12 percent by weight, which is at least 75 percent hydrogenated, preferably at least 85 percent hydrogenated; or 2) a hydrogenated polydiene polymer which may have one diene block of either isoprene or butadiene or maybe a diblock polymer wherein one block is of isoprene and the other block is of butadiene, and wherein the polymer may have a terminal hydroxy group, and wherein the polymer has a number average molecular weight of 500 to 20,000, preferably 1000 to 10,000, and is at least 75 percent hydrogenated, preferably at least 85 percent hydrogenated; or 3) a polyisoprene homopolymer having a number average molecular weight of 15,000 to 40,000, preferably 20,000 to 30,000 which is at least 75 percent hydrogenated, preferably at least 85 percent hydrogenated.

Polybutene/liquid polydiene hot melt adhesive

A pressure-sensitive tape is provided having a polyolefin backing, a primer comprising an elastomeric block copolymer which primer is applied from a non-aromatic hydrocarbon solvent, said tape further comprising an adhesive on the thus primed surface. Because the primer is laid down from a solution in a non-aromatic hydrocarbon solvent such as methyl cyclohexane the process utilizes an environmentally-friendly solvent.

Hydrogenated elastomer primed polyolefin film

This invention is a silicone oil gel composition which is comprised of a silicone block copolymer selected from the group consisting of polyethylene-polydimethylsiloxane block copolymers and polyethylene-polydimethylsiloxane-polydiphenylsiloxane block copolymers wherein the overall number average molecular weight ranges from 1000 to 21,000, preferably 1000 to 6000. The polyethylene blocks have a number average molecular weight of 400 to 3000, preferably 400 to 1500, the polydimethylsiloxane blocks have a number average molecular weight of 600 to 20,000, preferably 600 to 10,000, and the polydiphenylsiloxane blocks have a number average molecular weight of 200 to 2000, preferably 600 to 1200, wherein the block copolymer is dissolved in a silicone oil which is a polydimethylsiloxane polymer having a number average molecular weight of from 1000 to 1,000,000, preferably 4000 to 30,000.

Oil gel formulations containing polyethylene-polydimethylsiloxane block

A primer composition suitable for metallic substrates, which primer comprises a hydrogenated elastomeric block copolymer having resinous endblocks, the copolymer being functionalized by treatment with an unsaturated monomer such as maleic anhydride. The primer composition further comprises an endblock compatible resin such as an aromatic resin. Such compositions are especially useful for priming metal which is later to be fabricated into channels and frames. Thus, it is of particular utility in the construction of double glazed insulated windows.

Acid-grafted hydrogenated elastomer/endblock aromatic resin primer

A pressure sensitive adhesive composition for skin adhesion and bandage applications which comprises (a) 100 parts by weight of a styrene-isoprene-styrene triblock or multiarm copolymer which has a coupling efficiency of 20 to 50%, an overall absolute arm molecular weight of 33,000 to 100,000, a polystyrene content of 18 to 30%, and a polystyrene block weight average molecular weight of 11,000 to 20,000, and (b) from 100 to 400 parts by weight of a styrene-isoprene diblock copolymer which has an overall absolute molecular weight of 20,000 to 40,000, a polystyrene content of 10 to 25%, and a polystyrene block weight average molecular weight of 4000 to 7000.

Adhesive composition for skin adhesion and bandage applications

This invention is an EPDM roofing membrane adhesive system which comprises an outer protective layer of EPDM and an adhesive layer coated on the underside of said EPDM layer to adhere the membrane to a similarly coated EPDM membrane or to the primed surface of a roof. The adhesive layer comprises from 40 to 60 percent by weight of a hydrogenated styrene-diene-styrene block copolymer having a polystyrene content of from 20 to 40 percent by weight and an overall weight average molecular weight of from 50,000 to 150,000, from 15 to 35 percent by weight of a polyphenylene ether resin having an intrinsic viscosity of less than 0.35 deciliters per gram or of a high softening point endblock resin and from 15 to 35 percent by weight of a tackifying resin. Preferably, the molecular weight of the block copolymer is from 50,000 to 100,000 and the intrinsic viscosity of the polyphenylene ether is less than 0.2.

EPDM roofing membrane adhesive system based on hydrogenated

A laminating adhesive comprising an adhesive composition which comprises

Solvent-free laminating adhesive composition

A linear styrene-isoprene-styrene block copolymer composition comprised of linear polymeric blocks wherein the block copolymer composition has a coupling efficiency of from 20 to 40%, a polystyrene content of from 18 to 24%, a polystyrene block molecular weight of from 25,000 to 35,000, and an overall molecular weight of above 280,000 to 520,000. The invention also contemplates adhesive formulations comprising these block copolymer compositions and a tackifying resin.

Growing community of inventors

Houston, TX, United States of America

David Romme Hansen