Abstract: Tie-layer adhesive compositions which are blends of modified and unmodified polyolefins and containing a saturated bicyclic modifier compound and multi-layer barrier films having improved clarity produced therewith are provided.
Abstract: A process for the copolymerization of ethylene and ?-olefins which utilizes a mixed modifier comprised of a conjugated diene and alkoxysilane is disclosed.
Abstract: Filled propylene polymer compositions having significantly improved melt strength are provided. The compositions are blends of propylene polymer, mineral filler with an ethylene polymer component consisting of an ethylene plastomer and a silane-containing ethylene polymer.
Type:
Grant
Filed:
November 30, 2005
Date of Patent:
May 20, 2008
Assignee:
Equistar Chemicals, LP
Inventors:
Jeffrey J. Strebel, Sameer D. Mehta, Jeffrey A. Jones
Abstract: Cellulosic-reinforced composites having increased resistance to water absorption are provided. The improved composites are obtained using a mixture of high density polyethylene and silane copolymer with the cellulosic filler.
Type:
Grant
Filed:
December 20, 2005
Date of Patent:
March 25, 2008
Assignee:
Equistar Chemicals, LP
Inventors:
Sameer D. Mehta, Manivakkam J. Shankernarayan
Abstract: High density polyethylene having reduced melt elasticity and a reduced level of highly short-chain branched polymer molecules and wire and cable insulation compositions based thereon having improved strippability and oxidative stability are provided.
Abstract: A process for improving the melt characteristics of polyethylene resins is provided. The process involves contacting a polyethylene resin powder with a low level of free radical initiator at a temperature below the melting point of the resin.
Abstract: Flame retardant crosslinkable polyolefin compositions useful for the production of films, sheets and membranes are provided. The compositions are comprised of ethylene-silane copolymer, plastomer, flame retardant filler and, optionally, silanol condensation catalyst.
Abstract: An improved two-step polymerization process wherein ethylene homopolymer is produced in a first reactor and ethylene copolymer having narrowed short-chain branching distribution is prepared in a second reactor. Narrowed short-chain branching distribution of the copolymer is achieved by including specific silane modifiers in the second reactor.
Abstract: Adhesive compositions useful for adhering barrier resins are provided. The adhesives are a blend of ethylene-a-olefin copolymer base resin having hard and soft phases which form a network structure and a functionally modified ethylene-?-olefin copolymer.
Abstract: Functionalized propylene polymer compositions useful as coupling/compatibilizing agents are provided. The compositions are a mixture of two different functionalized propylene polymers. Polypropylene composites containing fillers and/or non-compatible resins and formulated using the mixed functionalized coupling/compatibilizing agents are also provided.
Abstract: Moisture curable flame retardant insulation compositions for wire and cable having improved adhesion are provided. The compositions are comprised of an ethylene-silane copolymer, high density polyethylene resin, halogenated flame retardant, silanol condensation catalyst and stabilizer combination consisting of a zinc mercaptobenzimidazole and aromatic secondary amine.
Type:
Grant
Filed:
September 2, 2003
Date of Patent:
February 14, 2006
Assignee:
Equistar Chemicals, LP
Inventors:
Lester Y. Lee, Jeffrey S. Borke, Steven W. Horwatt
Abstract: Crosslinkable, flame retardant insulation compositions having improved resistance to scorch are provided. The compositions are comprised of a base resin, hydrated inorganic filler, coupling agent and stabilizer and formulated with a peroxide/scorch retardant combination, specifically, a combination of ?,??-bis(t-butylperoxy)diisopropyl benzene and 2,4-diphenyl-4-methyl-1-pentene.
Abstract: Moisture curable flame retardant wire and cable formulations having improved abrasion resistance are provided. The compositions are comprised of a high density silane-containing polyethylene base resin which can be a blend of a bimodal HDPE and ethylene-silane copolymer or silane-grafted bimodal HDPE in combination with a flame retardant and silanol condensation catalyst.
Abstract: An expandable shoe for inline skates having front and rear shoe portions with wheel receiving channels and upwardly extending blocking means is provided. A flexible bridge connecting said front and rear shoe portions pulls the shoe portions toward each other when the skate wheels are inserted so that the blocking means engage the front and rear wheels with sufficient force to secure the shoe for walking or storage.
Type:
Grant
Filed:
August 21, 2003
Date of Patent:
July 12, 2005
Inventors:
Richard Anthony Riley, Frank A. Leyshon
Abstract: A process for producing acid functionalized polyolefins by hydrolyzing maleic anhydride grafts using a dispersion technique is provided. Acid functionalized polyolefin powders produced by the process as well as adhesive blends formulated therewith are also disclosed.
Type:
Grant
Filed:
December 17, 2002
Date of Patent:
July 5, 2005
Assignee:
Equistar Chemicals LP
Inventors:
Daniel R. Ward, Douglas C. McFaddin, Bradley P. Etherton
Abstract: Ethylene polymer composites and concentrates utilized for their preparation are provided. The composites of the invention have increased melt strength compared to the base resin and other improved physical characteristics. The composites contain an organically modified clay and may also contain a compatibilizng agent, depending on the base resin used.
Type:
Grant
Filed:
December 20, 2001
Date of Patent:
January 18, 2005
Assignee:
Equistar Chemicals, LP
Inventors:
Sameer D. Mehta, Harilaos Mavridis, Venki Chandrashekar, Edward S. Vargas
Abstract: Adhesives useful for adhering fluoropolymers are provided. The adhesives are a blend of linear low density polyethylene, ethylene polymer plastomer, polyolefin elastomer and modified polyolefin having acid or acid derivative functionality. Composite fluoropolymer/adhesive structures are also provided.
Abstract: Adhesive compositions which exhibit significantly improved adhesion to metals and polyolefins are provided. The compositions are blends of one or more polyolefin base resins and graft-modified polyolefin to which a low level of adhesion promoter is added.
Abstract: A process for preparing premixed supported boraaryl catalysts having improved shelf life is provided. The process comprises supporting an organometallic compound comprising a group 3-10 transition metal or lanthanide metal and at least one boraaryl ligand an inorganic support which has been chemically and thermally dehydroxylated to remove all hydroxyl from the surface of the support; contacting with an organoaluminum compound utilizing an incipient wetness procedure wherein 90 to 150 percent of the catalyst pore volume is filled with a hydrocarbon solution containing the organoaluminum and provide a molar ratio of aluminum to transition/lanthanide metal of 0.5:1 to 50:1; and recovering the premixed catalyst powder.