Exxonmobil Chemical Patents Inc.

Zurn Pex, Inc.

Other

Exxonmobil Research and Engineering Company

David B Dunaway

Bruce Alan Harrington

Bryan Robert Chapman

Gary Lee Runyan

Robert G Russell

Rodney Mize

Patrick Brant

Andy Haishung Tsou

Gabor Kiss

Mun Fu Tse

Wen Li

Chon-Yie Lin

Bruce R Lundmark

Robert Patrick Reynolds, Jr

Robert P Reynolds

Donald Sheley Tracey

Steven A Best

Robert C Portnoy

Etienne R H Lernoux

Gerd Arthur Allermann

Giriprasath Gururajan

Bruce A Harrinton

Gerd Arthur Allenmann

Sheets made from metallocene-catalyzed polyethylene polymers, optionally, with other polymers, are disclosed.

Polyethylene sheets

A method for producing a high strength, flexible crosslinked polyethylene (PEX) material is provided wherein the base polymer is intermixed with a polymer modifier which affects the amorphous region of the polymer, leaving the crystalline portion of the base polymer virtually unaffected. Consequently, the amorphous region's density is lowered, resulting in a more flexible final product, while the crosslinked molecular structure and/or crystalline portion of the polymer, which controls the strength of the base polymer, remains strong. The polymer modifier can comprise a hydrocarbon fluid such as PAO, Group III basestocks, or a gas-to-liquid hydrocarbon. The plastic material has particular utility in the production of tubing, piping, and conduits for transporting gases, liquids, and the like, as well as wire and cable coatings such as jacketing and insulation.

Crosslinked polyethylene process

This invention relates to a film or sheet and a process to make a film or sheet having a thickness of 0.5 to 35 mils comprising a blend composition comprising: a) 4 to 50 wt % of one or more polypropylene-based TPO(s); and b) 30 to 80 wt % of one or more ethylene plastomer(s); and c) 0.5 to 35 wt % of one or more non-functionalized plasticizer(s) having a kinematic viscosity at 100&#xb0; C. of 4 to 300 cSt, a pour point of &#x2212;20&#xb0; C. or less, and a flash point of 200&#xb0; C. or more; and d) 0 to 69.5 wt % of one or more filler(s); and wherein the blend composition is calendered into a film or sheet.

Calendered films of plasticized blends of plastomer and impact copolymer

This invention relates to a polymer composition comprising: 70 wt % to 99.5 wt % of a nitrile-group containing elastomer, wherein the elastomer has: a Mooney Viscosity of 15 to 115 MU; and a nitrile monomer content of 0.5 wt % to 50 wt %; and 0.5 wt % to 30 wt % of a non-functionalized plasticizer (NFP), wherein the NFP has: a kinematic viscosity at 100&#xb0; C. of 4 to 1000 cSt, a flash point of &#x2267;200&#xb0; C., a viscosity index of &#x2267;120, and a specific gravity of &#x2266;0.865; and wherein the composition has: a 25% compression set at 70 hours and &#x2212;30&#xb0; C. that is at least 110% of the 25% compression set of same composition without the NFP tested at the same conditions, and a retained tensile strength, in MPa, after 168 hours at 175&#xb0; C., that is at least about 88% of the retained tensile strength of the same composition that has not been aged.

Modifiers for nitrile containing elastomers

A high strength, flexible crosslinked polyethylene (PEX) material is provided wherein the base polymer is intermixed with a polymer modifier which affects the amorphous region of the polymer, leaving the crystalline portion of the base polymer virtually unaffected. Consequently, the amorphous region's density is lowered, resulting in a more flexible final product, while the crosslinked molecular structure and/or crystalline portion of the polymer, which controls the strength of the base polymer, remains strong. The polymer modifier can comprise a hydrocarbon fluid such as PAO, Group III basestocks, or a gas-to-liquid hydrocarbon. A method for producing the plastic material is also provided. The plastic material has particular utility in the production of tubing, piping, and conduits for transporting gases, liquids, and the like, as well as wire and cable coatings such as jacketing and insulation.

Crosslinked polyethylene articles and processes to produce same

A process for fluid phase in-line blending of polymers. The process includes providing two or more reactor trains configured in parallel and a separator for product blending and product-feed separation; contacting in at least one of the parallel reactor trains olefin monomers having three or more carbon atoms, catalyst systems, optional comonomers, optional scavengers, and optional inert diluents or inert solvents, at a temperature above the solid-fluid phase transition temperature of the polymerization system and a pressure no lower than 10 MPa below the cloud point pressure of the polymerization system and less than 1500 MPa; forming a reactor effluent including a homogeneous fluid phase polymer-monomer mixture in each parallel reactor train; combining the reactor effluent from each parallel reactor; passing the combined reactor effluent through the separator; maintaining the temperature and pressure within the separator above the solid-fluid phase transition point but below the cloud point pressure and temperature to form a fluid-fluid two-phase system including a polymer-rich blend phase and a monomer-rich phase; and separating the monomer-rich phase from the polymer-rich blend phase. The separated monomer-rich phase is recycled to the polymerization reactor bank. The polymer-rich blend phase is conveyed to a downstream finishing stage for further monomer stripping, drying and/or pelletizing to form a polymer product blend.

Process for fluid phase in-line blending of polymers

Provided are elastomeric compositions, such as a tire innerliner, comprising at least one isobutylene based elastomer and at least one hydrocarbon fluid additive ('HFA'). The compositions have improved cold temperature properties and are particularly useful as tire innerliners for an aircraft tire. The use of a HFA in the elastomeric composition may allow for the use of reduced amounts of secondary elastomers, such as natural rubber, while allowing for an improved balance in the composition's brittleness and permeability properties. Examples of useful HFAs include polyalphaolefins, high purity hydrocarbon fluids, and water white group III mineral oils.

Tire innerliners having improved cold temperature properties

In one embodiment, the present invention is directed to an article, such as a blow-molded bottle, formed from a polymer blend composition. In one aspect, the article is formed by blow-molding techniques. In one aspect, the article is a blow-molded container having a Bruceton Mean Drop Height of 3.8 feet or above. In another aspect, the article is a blow-molded container having a volume of 60 fluid ounces or greater. In general, the polymer blend composition comprises polypropylene and an impact modifier of metallocene-produced very low density polyethylene or linear low density polyethylene. In one embodiment, the polypropylene polymer comprises a random copolymer. In one embodiment the metallocene-catalyzed linear very low density polyethylene polymer has one or more of the following: (a) a density of less than 0.916 g/cm, (b) a composition distribution breadth index of 50 to 85% by weight, (c) a molecular weight distribution Mw/Mn of 2.0 to 3.0, (d) a molecular weight distribution Mz/Mw of less than 2.0, and (e) two peaks in a TREF measurement. In one embodiment, the polymer blend composition comprises 5% to 85% of the impact modifier and 95% to 15% of the polypropylene polymer, based on the total combined weight of the polypropylene polymer and the impact modifier. In another embodiment, the polymer blend composition comprises 5% to 35% of the impact modifier and 95% to 65% of the polypropylene polymer, based on the total combined weight of the polypropylene polymer and the impact modifier.

Metallocene-produced very low density polyethylenes or linear low density polyethylenes as impact modifiers

Apparatus for testing the collapsibility of a plastic container, the container having a bottom, a peripheral side wall and an upper opening, the side wall formed with at least one peripheral fold line which, upon compression, facilitates telescoping of one portion of the container side wall into another portion of the container side wall, the apparatus comprising a base supporting a platform sized to receive a bottom portion of a container; a tool platen supported above the platform for reciprocating movement toward and away from the platform, the platen mounting a tool sized and shaped to engage the upper opening of the container; and a force gauge operatively attached to the platform for measuring force required to move the container from an upright, extended condition to a collapsed condition.

Collapsible container test fixture

Growing community of inventors

Houston, TX, United States of America

David B Dunaway