Dow Global Technolgoies LLC

The Dow Chemical Company

Other

Robert Thomas Johnston

Ashish Batra

Wenbin Liang

Jose Manu Rego

Kim Louis Walton

Brian W Walther

Thoi H Ho

Susan Grace James

Pradeep Jain

Morgan Mark Hughes

Jeffrey C Munro

Raymond Lynn Laakso, Jr

Xiaosong Wu

Alec Y Wang

Debra J Mangold

Jimmy D Allen

Dana R Breed

Evelyn J Morrison

Evelyn J Slone

Xiaosong (Sharon) Wu

The present disclosure provides an oil-extended olefin block copolymer composition. The oil-extended olefin block copolymer composition includes an olefin block copolymer, an oil, and a surface-active agent and may optionally include an olefin-based polymer. The oil-extended olefin block copolymer composition advantageously exhibits reduced, or no, oil-bleed.

Bleed resistant, oil-extended olefin block copolymer composition with surface-active agent

Bleed-resistant, oil-extended olefin block copolymer composition with surface-active agent

Disclosed are oil-extended olefin block copolymer compositions with low, or no, tack. A unique comonomer content in the soft segment of the OBC in conjunction with the presence of a polyolefin provides the present oil-extended OBC composition with softness, low (or no) tack, and low (or no) oil-bleed.

Olefin block copolymer composition with low tack

Disclosed are oil-extended olefin block copolymer compositions with microcrystalline wax. The microcrystalline wax reduces oil-bleed while maintaining composition softness.

Bleed resistant, oil-extended olefin block copolymer composition with microcrystalline wax

Disclosed are oil-extended olefin block copolymer compositions with precipitated silica. The precipitated silica reduces oil-bleed while maintaining composition softness.

Bleed resistant, oil-extended olefin block copolymer composition with precipitated silica

Embodiments of the invention provide block composites and their use in thermoplastic vulcanizate compounds.

Block composites in thermoplastic vulcanizate applications

Block compositions in thermoplastic vulcanizate applications

Highly oil-filled ethylene/alpha-olefin/diene (EAODM) polymers in a free flowing powder or pellet form, processes for preparing these polymers, and the use of these polymers to prepare thermoplastic vulcanizates (TPV) are provided. Thermoplastic vulcanizate premixes can be prepared with the EAODM polymers and thermoplastic polymers, the premixes being easily converted into TPVs.

Thermoplastic vulcanizates and process to prepare them

At least partially vulcanized elastomers are described, these elastomers obtained by at least partially crosslinking (1) an elastomeric polymer containing reactive substituents with (2) a crosslinking agent (a) containing two or more reactive substituents differing from those contained in the elastomeric polymer, and (b) having a number average molecular weight less than about 2000, each of the reactive substituents selected (i) such that those of the elastomer will react with those of the crosslinking agent to at least partially crosslink the elastomer, and (ii) from the group consisting of carboxylic acid, carboxylic anhydride, carboxylic acid salt, carbonyl halide, hydroxy, epoxy, and isocyanate.

Crosslinked elastomers processes for their manufacture and articles made from these elastomers

The subject invention pertains to heteromorphic polymer compositions characterized as comprising: (a) a homogeneous linear or substantially linear ethylene/&agr;-olefin interpolymer backbone; and (b) a branch appending from the backbone, which branch comprises an ethylene homopolymer or ethylene/&agr;-olefin interpolymer having a density which is at least 0.004 g/cm,greater than that of the backbone. At least one of the backbone polymer or the branch polymer may be optionally functionalized to promote adhesion to polar surfaces. The heteromorphic polymer compositions of the invention exhibit enhanced upper service temperature. Also disclosed is a process for preparing the heteromorphic polymer compositions of the invention.

Heteromorphic polymer compositions

A novel process is disclosed for stabilizing polyethylene resins having pendant vinyl and/or vinylidene groups against changes in viscosity under melt process conditions. The process comprises adding a viscosity-stabilizing amount of transition metal or transition metal salt to the polyethylene resin prior to or during melt processing operations. The resulting polymer composition are melt-stabilized, crosslink-resistant, substantially gel-free polymer compositions having many uses. The novel compositions are prepared free of metal deactivators.

Stabilized polyethylene resins and method of stabilization

A film prepared from a compatibilized resin blend comprising an olefin polymer, a polymer of a vinyl aromatic monomer and a compatibilizing amount of a graft copolymer of a vinyl aromatic monomer and an EPDM rubber exhibits improved properties making it highly desirable in such end uses as grocery and trash bags.

Growing community of inventors

Lake Jackson, TX, United States of America

Robert Thomas Johnston