Inorganic Nrm Additive Patents (Class 524/586)
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Patent number: 6106956Abstract: A polymer film comprising at least first and second contiguous and coextruded portions, wherein the first portion is extruded from a first polymer composition containing a filler material in an amount sufficient to increase the water vapor permeability of the first portion relative to the second portion, and the second portion is extruded from a second polymer composition such that a tensile strength of the second portion is greater than the tensile strength of the first portion. Such polymer films allow for highly vapor permeability, while providing portions with sufficient strength to allow for taping or attachment of fastening devices.Type: GrantFiled: January 26, 1998Date of Patent: August 22, 2000Assignee: Exxon Chemical Patents, Inc.Inventors: Hans E. Heyn, Kevin A. Brady
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Patent number: 6103807Abstract: An ethylene-polymer-based composition obtained by mixing, in the melt: 100 parts by weight of an ethylene polymer withfrom 0.0005 to 0.1 part by weight of a compound (a) with the ability to generate free radicals andfrom 0.0005 to 0.1 part by weight of coagent (b) chosen from among the C.sub.3 to C.sub.12 alkenes and the C.sub.5 to C.sub.16 alkadienes.This composition has clearly improved melt strength. It is very suitable for extrusion and rotational molding and in particular for the extrusion of tubes intended for conveying fluids under pressure. The invention also relates to a process for obtaining the composition and using it for the manufacture of shaped articles, and to shaped articles.Type: GrantFiled: March 19, 1998Date of Patent: August 15, 2000Assignee: Solvay Polyolefins Europe-Belgium (Societe Anonyme)Inventors: Stephen J. Carter, Laurent Cardon, Wim Coppens
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Patent number: 6077880Abstract: In accordance with the present invention there is provided a method for making a highly radiopaque polyolefin compound, wherein the radiopaque material in said compound is substantially uniformly dispersed and held within a polymer matrix. During the method one first heats an amount of polyolefin, preferably low density polyethylene, to at least its melting temperature. The amount of polyolefin is equal to at least 10% by weight of the compound. Then an amount of radiopaque metal powder is added to the polyolefin. The amount of radiopaque metal is equal to up to 90% by weight of the compound. The metal powder is preferably tantalum, tungsten, gold or platinum. Thereafter, an amount of a dispersing agent is added to the polyolefin to form a mixture. The amount of dispersing agent is equal to at least 0.2% by weight of the compound. The dispersing agent is preferably zinc stearate, aluminum stearate or calcium stearate. Lastly, the mixture is mixed and cooled below its melting temperature to form the compound.Type: GrantFiled: July 22, 1998Date of Patent: June 20, 2000Assignee: Cordis CorporationInventors: Miguel Castillo, Joquin Villalobos, Jeffrey Walker
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Patent number: 6022905Abstract: The invention provides a composition and method for obtaining both light and dark laser marks of varying shades and intensities on a single plastic article by selectively controlling laser parameters. The invention further provides compositions and methods for obtaining pre-selected one-color and multi-colored designs on plastic articles, by selectively controlling material formulations and laser parameter settings.Type: GrantFiled: May 28, 1999Date of Patent: February 8, 2000Assignee: M.A. HannaColorInventors: Ronald M. Harris, Ke Feng, Alan R. Burgess
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Patent number: 6022924Abstract: A color masterbatch resin composition for a packaging material for a photographic photosensitive material which does not adversely affect photographic properties of the photographic photosensitive material, comprising a light-shielding material in a concentration thrice as much as or more that of the packaging material for a photographic photosensitive material, and a thermoplastic resin of which 50 wt. % or more is the same type as a thermoplastic resin occupying 50 wt. % or more of the total thermoplastic resin composing the packaging material for a photographic photosensitive material, production thereof, a packaging material for a photographic photosensitive material formed of a color masterbatch resin composition, and production thereof.Type: GrantFiled: July 10, 1998Date of Patent: February 8, 2000Assignee: Fuji Photo Film Co., Ltd.Inventors: Mutsuo Akao, Koji Inoue
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Patent number: 6017972Abstract: The invention provides a composition and method for obtaining both light and dark laser marks of varying shades and intensities on a single plastic article by selectively controlling laser parameters. The invention further provides compositions and methods for obtaining pre-selected one-color and multi-colored designs on plastic articles, by selectively controlling material formulations and laser parameter settings.Type: GrantFiled: May 28, 1999Date of Patent: January 25, 2000Assignee: M.A. HannaColorInventors: Ronald M. Harris, Ke Feng, Alan R. Burgess
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Patent number: 5962549Abstract: Composites suitable for use as prostheses for attachment to soft tissues, such as cartilage, tendons, skin, tympanic membrane and gingiva, as well as to cancellous or trabecular bone, are based on combination of a polyolefinic binder with certain bioactive glass materials. The composites bond actively with soft tissues and are readily formulated achieve mechanical properties comparable to those of the soft tissue of interest.Type: GrantFiled: December 9, 1997Date of Patent: October 5, 1999Assignees: University of London, University of Florida Research FoundationInventors: William Bonfield, Min Wang, Larry L. Hench
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Patent number: 5959015Abstract: A electrical conductivity modified thermoplastic olefin (TPO) polymer blend with improved electrostatic painting efficiency, the blend comprising a substantially uniform mixture of: I. polymeric material being the reaction product of: (a) polypropylene, (b) maleated polypropylene, (c) elastomer, and (d) amine-terminated polyether being a linear or branched polymer of oxypropyleneamine or oxyethyleneamine repeating units having 40-100 such units, and II. alkali metal salt, the alkali metal salt being included in the thermoplastic polymer blend in an amount which provides the blend with a conductivity of at least 10.sup.-12 S/cm at 25.degree. C.Type: GrantFiled: June 23, 1998Date of Patent: September 28, 1999Assignee: Ford Global Technologies, Inc.Inventors: Jeffrey Hampton Helms, Rose Ann Ryntz, Edmund Joseph Blais
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Patent number: 5936029Abstract: The present invention provides a method of anionic synthesis of stable macrocyclic polymers that are compounded to form vulcanizable elastomeric compounds exhibiting reduced hysteresis properties. Cyclic organometallic compounds containing divalent metal atoms of Groups IIA and IIB of the Periodic System are employed as initiators of anionic polymerization of conjugated diene, vinyl aromatic and/or triene monomers. Coupling of the living ends of the resulting macrocyclic polymers or copolymers with a coupling agent or a coupling agent that is also a functionalizing agent results in stable macrocyclic polymers with improved hysteresis properties.Type: GrantFiled: September 29, 1997Date of Patent: August 10, 1999Assignee: Bridgestone CorporationInventor: James E. Hall
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Patent number: 5902849Abstract: A filling compound for electrical and optical equipment in the form of cables, connectors, plugs etc. and to assemblies thus produced, is provided. Electrical and optical equipment in the form of cables, connectors, plugs etc. have to be protected against harmful influences penetrating from outside, particularly water, and also against mechanical damage during laying or as a result of exposure to heat. The filling compound is based on a stellate substance, i.e. a substance having a branched molecular structure in which, ideally, 3 or more branches, more particularly polymeric chains, radiate from a single branching point. The filling compound is flexible at very low temperatures but, on the other hand, does not run out, even at extremely high temperatures.Type: GrantFiled: November 12, 1996Date of Patent: May 11, 1999Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Reimar Heucher, Juergen Wichelhaus, Johannes Andres
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Patent number: 5861450Abstract: An additive to improve the hydrophobicity of a thermoplastic resin wherein the additive is at least 0.3 parts by weight of a thermoplastic silicone blend, said thermoplastic silicone blend having:(A) an organosilicone resin of the empirical formula(R.sub.3 Sio.sub.1/2)a (R.sub.2 SiO.sub.2/2)b (RSiO.sub.3/2)c( SiO.sub.4/2) dwherein: a and d are positive numerical values and b and c are zero or positive numerical values with the provisos that a+b+c+d=1, 0.ltoreq.(b+c).ltoreq.0.2 and the ratio of a:(b+c+d) is between about 0.3 and 1.0; and R is a monovalent radical independently selected from the group consisting of hydrogen, hydroxyl, alkyl, alkenyl, alkoxy, oximo, aryl, epoxide, carboxyl, ether, polyether, amide and alkyl amino radicals, which R groups may be the same or different, with the proviso that at least sixty mole percent of said R radicals are methyl; and(B) a predominantly linear silicone fluid having the empirical formula(R'.sub.3 SiO.sub.1/2)x (R'.sub.2 SiO.sub.2/2)y (R'SiO.sub.Type: GrantFiled: August 28, 1996Date of Patent: January 19, 1999Assignee: Dow Corning CorporationInventors: Wei Chen, Kevin Edward Lupton, David Joseph Romenesko, Randall Gene Schmidt, Hongxi Zhang
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Patent number: 5728753Abstract: Composites suitable for use as prostheses for attachment to soft tissues, such as cartilage, tendons, skin, tympanic membrane and gingiva, as well as to cancellous or trabecular bone, are based on combination of a polyolefinic binder with certain bioactive glass materials. The composites bond actively with soft tissues and are readily formulated achieve mechanical properties comparable to those of the soft tissue of interest.Type: GrantFiled: November 9, 1995Date of Patent: March 17, 1998Assignees: University of London, University of FloridaInventors: William Bonfield, Min Wang, Larry L. Hench
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Patent number: 5661203Abstract: Organosiloxane compositions exhibiting excellent vibration damping properties comprise(A) from 70 to 99.9 weight percent of a liquid polyorganosiloxane,(B) from 0.1 to 10 weight percent of hollow particles of a thermoplastic organic resin, and(C) from 0 to 20 weight percent of a thickener.Type: GrantFiled: April 17, 1996Date of Patent: August 26, 1997Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Shoji Akamatsu, Yasue Kanzaki
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Patent number: 5516822Abstract: Stable aqueous coemulsions of oxidized polyethylene with amino functional silicone fluids which includes at least one constituent selected from the group consisting of; ethoxylated aliphatic amines, ethoxylated nonylphenols, ethoxylated primary alcohols, ethoxylated secondary alcohols or other nonionic emulsifiers are taught, as well as processes for making the same. The coemulsions may also comprise further constituents, including but not limited to fatty acids, ammonium hydroxide, salts and water. The coemulsions find use in conjunction with textile processing and paper processing.Type: GrantFiled: February 22, 1994Date of Patent: May 14, 1996Assignee: AlliedSignal Inc.Inventors: Robert M. Blanch, Mark J. Kaszubski
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Patent number: 5514743Abstract: Reinforced, flame-resistant thermoplastic composition consisting of: (A) a polymeric matrix consisting of an olefinic or styrene (co)polymer; (B) a quantity which is sufficient to give flame resistance properties, of an intumescent flame-retarding agent consisting of a mixture of (i) a compound containing nitrogen, insoluble in water, consisting of an oligomer or polymer of a derivative of 1,3,5-triazine and (ii) an ammonium phosphate, and (C) from 5 to 50% by weight with respect to the total composition of a phosphorite having a phosphorous content, expressed as BPL (Bone Phosphate of Lime) of more than 40% by weight.Type: GrantFiled: June 13, 1995Date of Patent: May 7, 1996Assignee: Enichem S.p.A.Inventors: Roberto Pernice, Michele Checchin, Alessandro Moro, Roberto Pippa
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Patent number: 5455288Abstract: A novel coating process for making dustless color concentrate in granular form, is provided. The granules are individual resin particles coated with pigment and binder.Type: GrantFiled: January 26, 1994Date of Patent: October 3, 1995Inventor: Donald G. Needham
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Patent number: 5455073Abstract: A method for the production of a photographic coating support material includes a vacuum drying of the synthetic resin and the master batches as well as a storing and transport these products in a closed system with cleaned and dried air.Type: GrantFiled: June 11, 1993Date of Patent: October 3, 1995Assignee: Felix Schoeller jr Papierfabriken GmbH & Co.KGInventors: Ralf-Burkhard Dethlefs, Bernd Scholz, Udo Uyting
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Patent number: 5403891Abstract: A composition useful in the fabrication of extruded articles contains a thermoplastic resin such as polyethylene and from 100-3,000 parts per million of a lubricant which is (i) an organosilicon resinous copolymer having a number average molecular weight of between 1,200-10,000 and R.sub.3 SiO.sub.1/2, R.sub.2 SiO.sub.2/2, RSiO.sub.3/2 and SiO.sub.4/2 units, wherein R is a C.sub.1 -C.sub.6 alkyl, aryl, alkenyl and/or trifluoropropyl radical(s); or (ii) the organosilicon resinous copolymer and a siloxane polymer R.sub.3 SiO(R.sub.2 SiO).sub.n SiR.sub.3 wherein R is as defined heretofore and n is 1-100,000; or (iii) the organosilicon resinous copolymer and an absorbing filler such as silica; or (iv) the organosilicon resinous copolymer, the siloxane polymer and an absorbing filler.Type: GrantFiled: April 8, 1994Date of Patent: April 4, 1995Assignee: Dow Corning CorporationInventor: David J. Romenesko
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Patent number: 5385972Abstract: A filler-containing resin composition containingcomponent A, which is an ethylene copolymer having (a) a melt flow rate (MFR) of 0.01 to 20 g/10 min.; (b) a density D of not more than 0.935 g/cm.sup.3 ; (c) a single peak of elution volume corresponding to a temperature within a range from 30 to 100.degree. C. with the elution curve satisfying a relationship in which the ratio H/W is not less than 1 when H represents the height of the peak and W represents the width of the elution curve at 1/2 H; and (d) an elution volume Y wherein (1) Y.ltoreq.-4500D+4105 when the density D of the component A is less than 0.91 g/cm.sup.3, but Y.ltoreq.100; or (2) Y.ltoreq.10 when the density D of the component A is not less than 0.91 g/cm.sup.3 ; andcomponent B, which is a particulate inorganic filler having an average particle size of not more than 10 .mu.m, and a bulk density of 0.1 to 0.7 g/cm.sup.Type: GrantFiled: December 14, 1993Date of Patent: January 31, 1995Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Koji Yamamoto, Hajime Ikeno, Keiko Shichijo
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3,9-carbohydrate substituted 2,4,8,10-tetraoxa-3,9-diphosphaspiro(5.5)undecane phosphite stabilizers
Patent number: 5310891Abstract: Carbohydrate substituted phosphites of Formula I ##STR1## where A is a carbohydrate residue are effective stabilizers for polymers processed at elevated temperatures and subject to thermal or oxidative degradation.Type: GrantFiled: July 22, 1992Date of Patent: May 10, 1994Assignee: Ciba-Geigy CorporationInventors: Joseph E. Babiarz, Stephen D. Pastor -
Thin self-supporting inorganic green compacts and process for the preparation of such green compacts
Patent number: 5268415Abstract: Thin self-supporting green compact, less than 25.mu. thick, containing an inorganic substance and as a binder a polymer with a weight average molecular weight of more than 400,000, which polymer in a suitable solvent can form a thermoreversible gel above room temperature, the volume fraction of the inorganic substance being more than 45% relative to the total amount of binder plus inorganic substance and a process to prepare such green compacts.Type: GrantFiled: March 19, 1991Date of Patent: December 7, 1993Assignee: Stamicarbon B.V.Inventors: Jan K. Pieterse, Cornelis W. M. Bastiaansen, Frans Heffels, Willibrordus M. G. F. Pontenagel -
Patent number: 5236647Abstract: The present invention relates to compositions comprising conductive particles and one or more polymers, particularly acid copolymer resins or derived ionomers, which can be extruded or heat formed into films or articles. More specifically, the method of the present invention is directed to a novel, non-uniform heating process, wherein the edge portions of a material is heated about 3-50 degrees Celsius hotter than the center or middle portions of the article or film during fabrication to thereby provide improved and substantially uniform electrostatic dissipative ("ESD") properties.Type: GrantFiled: May 11, 1992Date of Patent: August 17, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventor: George D. Lynch
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Patent number: 5227427Abstract: A polyarylene sulfide resin composition which yields a molded article having excellent surface appearance and excellent toughness and impact resistance comprises a blend of a polyarylene sulfide resin and a polyolefin resin with a compound having a carbon-carbon double bond and an epoxy group in its molecule. Optionally a radical initiator and a filler can be added to the composition.Type: GrantFiled: April 29, 1992Date of Patent: July 13, 1993Assignee: Polyplastics Co., Ltd.Inventors: Hagime Serizawa, Masaru Kubota, Hiroyuki Sano
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Patent number: 5223566Abstract: A thermoplastic resin composition for extrusion molding superior in the balance of mechanical properties and moldability is obtained by using a partially crosslinked product obtained by dynamically heat-treating:(A) 100-1 wt % of an .alpha.-olefin (co)polymer of C.sub.2 to C.sub.8 ;(B) 0-99 wt % of a rubbery substance;0.01-7 parts by weight, based on 100 parts by weight of the components (A)+(B), of at least one crosslinking agent selected from:(C) a dihydroaromatic series compound or a polymer thereof,(D) an ether series compound,(E) a tetrahydroaromatic series compound, and(F) a cyclopentane series compound; and(G) 0.01-7 parts by weight of a polyfunctional monomer based on 100 parts by weight of the components (A)+(B).Type: GrantFiled: May 30, 1991Date of Patent: June 29, 1993Assignee: Nippon Petrochemicals Company, LimitedInventors: Fuyuki Aida, Tsutomu Miyamoto
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Patent number: 5221781Abstract: A thermoplastic resin composition well-balanced in rigidity, resistance to impact and to heat, dimensional stability, flame retardance and moldability, prepared by incorporating an inorganic filler and/or a flame retardant into a thermoplastic resin composition containing a partially crosslinked product obtained by dynamically heat-treating a thermoplastic resin and/or a rubbery substance in the presence of at least one crosslinking agent selected from a dihydroaromatic series compound or a polymer thereof, an ether series compound, a tetrahydroaromatic series compound, and a cyclopentane series compound, and also in the presence of a polyfunctional monomer.Type: GrantFiled: July 2, 1991Date of Patent: June 22, 1993Assignee: Nippon Petrochemicals Company, LimitedInventors: Fuyuki Aida, Tsutomu Miyamoto, Masaaki Miyazaki
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Patent number: 5221782Abstract: A composition for injection molding well-balanced in rigidity, impact resistance, appearance of molded products and moldability is obtained by using as an essential component a partially crosslinked product being prepared by dynamically heat-treating:(A) 40-100% by weight of an .alpha.-olefin (co)polymer resin having 2 to 8 carbon atoms;(B) 0-60% by weight of rubbery substance; 0.01-0.07 parts by weight, based on 100 parts by weight of said components (A)+(B), of at least one crosslinking agent selected from:(C) a dihydroaromatic compound or a polymer thereof,(D) an ether family compound,(E) a tetrahydroaromatic compound, and(F) a cyclopentane family compound; and(G) 0.01-7 parts by weight of a polyfuncational monomer based on 100 parts by weight of said components (A)+(B).Type: GrantFiled: July 2, 1991Date of Patent: June 22, 1993Assignee: Nippon Petrochemicals Company, LimitedInventors: Fuyuki Aida, Tsutomu Miyamoto, Masaaki Miyazaki
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Patent number: 5214091Abstract: Disclosed in this invention is a thermoplastic resin composition comprising a thermoplastic resin, a conductive inorganic filler and/or a non-conductive inorganic filler, and an adduct of an ethylene oxide with a saponified product of a copolymer of ethylene and a vinyl ester of a saturated carboxylic acid. The adduct of an alkylene oxide with a saponified product of a copolymer of ethylene and a vinyl ester of a carboxylic acid is an additive having excellent compatibility with the thermoplastic resin and useful for improving dispersibility of the inorganic filler.Type: GrantFiled: March 4, 1992Date of Patent: May 25, 1993Assignee: Sumitomo Chemical Company, LimitedInventors: Hisao Tanaka, Sumio Hara
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Patent number: 5149732Abstract: Rubber compositions are disclosed for integral attachment of polymeric and metallic materials. Improved bondability is attributed to the use of a selected base rubber blended with a selected class of inorganic or organic fillers, silane compounds and vulcanizing agents such that the finished composition is provided with a specified range of Mooney viscosities. Also disclosed is a method of hose-metal fitting connection by the application of the composition. Gas- and oil-impermeability characteristics are greatly enhanced.Type: GrantFiled: March 6, 1990Date of Patent: September 22, 1992Assignee: The Yokohama Rubber Co., Ltd.Inventors: Shigeru Igarashi, Osamu Ozawa, Tetsu Kitami
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Patent number: 5124383Abstract: A resin composition for cleaning the inside of molding machines, capable of easily achieving color exchange and the resin exchange of thermoplastic resins in various molding machines, in a small quantity, by a simple operation and in a short time is provided, which resin composition is a cleaning resin composition having 1-10 wt. % of a polyethylene wax, 1-20 wt. % of a neutral salt of an alkylbenzenesulfonic acid and 1-20 wt. % of an inorganic filler, blended with a high density polyethylene resin having a melt index of 1.0 or less and a Q value expressing a molecular weight distribution, of 10 or less.Type: GrantFiled: May 30, 1991Date of Patent: June 23, 1992Assignee: ChissoInventors: Kenjiro Obama, Hiroshi Takasu, Susumu Arase, Hiroyuki Fujii
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Patent number: 5096941Abstract: A polymeric composition which degrades in the presence of oxygen either photochemically or thermo-oxidatively comprising a blend of polyethylene, e.g. low density polyethylene and cerium (III) stearate.This composition is especially useful in degradable food wrap and packaging and as an agricultural mulch film.Type: GrantFiled: August 23, 1990Date of Patent: March 17, 1992Assignee: The Dow Chemical CompanyInventor: Robert M. Harnden
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Patent number: 5087653Abstract: A resin composition for cleaning the inside of molding machines, capable of easily achieving the color exchange and resin exchange of thermoplastic resins in various molding machines, in a small quantity, by a simple operation and in a short time is provided, which resin composition is a cleaning resin composition having (a) 1-10 wt. % of a polystyrene resin, 1-20 wt. % of a neutral salt of an alkylbenzenesulfonic acid, 1-30 wt. % of an inorganic filler and 0.5-10 wt. % of a water-repellent compound blended with a high density polyethylene resin having a melt index of 1.0 or less and a Q value expressing a molecular weight distribution, of 10 or less.Type: GrantFiled: May 10, 1990Date of Patent: February 11, 1992Assignee: Chisso CorporationInventors: Kenjiro Obama, Hiroshi Takasu, Susumu Arase, Hiroyuki Fujii
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Patent number: 5071887Abstract: A polyurethane elastomer produced by reaction of a polyisocyanate with an amine-type polyol and another type polyol, the polyisocyanate being an isocyanurate-modified hexamethyelene diisocyanate; and the equivalent ratio of active hydrogen to isocyanate group to be reacted being in a range of from 0.8 to 1.6; and the ratio of the amine-type polyol to the another type polyol being in a range of from 10/90 to 100/0 by weight.Type: GrantFiled: February 15, 1990Date of Patent: December 10, 1991Assignee: Nippon Polyurethane Industry Co., Ltd.Inventors: Shigeru Nakagawa, Kiyofumi Murayama, Yukio Ohbuchi, Yamagata Tomoyuki
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Patent number: 5070129Abstract: An improved polyolefin composition, film product, and a method of preparation are provided. Fluoropolymers, preferably fluoroelastomers, and metal stearates, are added to polyolefins. The composition has and exhibits improved impact strength and better processability.Type: GrantFiled: February 6, 1990Date of Patent: December 3, 1991Assignee: Phillips Petroleum CompanyInventor: Fay W. Bailey
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Patent number: 5063110Abstract: A process for (co)polymerizing alpha-olefins in the gas phase in a fluidized bed or mechanically stirred bed reactor using a Ziegler-Natta type catalyst or a heat activated chromium oxide/refractory oxide catalyst wherein the (co)polymerization is carried out in the presence of 0.005 to 0.2 weight %, based on the weight of the (co)polymer bed, of an inert pulverulent inorganic substance (e.g. silica) having a mean particle diameter between 0.5 and 20 microns. The process is capable of being operated at temperatures closer to the softening point of the produced polyolefin than in the absence of the pulverulent solid.Type: GrantFiled: July 2, 1990Date of Patent: November 5, 1991Assignee: BP Chemicals LimitedInventors: Jean-Claude A. Bailly, Joelle Collomb
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Patent number: 5049595Abstract: A plastic concentrate containing a pigment and/or filler for the production of a polyolefin coating compound for photographic support materials produced by means of a double screw extruder with degassing.Type: GrantFiled: December 11, 1989Date of Patent: September 17, 1991Assignee: Felix Schoeller jr. GmbH & Co. KGInventors: Ralf-Burkhard Dethlefs, Bernd Scholz, Wolfram Wysk
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Patent number: 5030677Abstract: Disclosed is a composition for injection moulding which is composed of a sinterable powder comprising at least one metal or alloy and a binder. The binder contains from 10 to 80% by weight of a low-density polyethylene from 10 to 80% by weight of a paraffin wax and from 5 to 35% by weight of a boric acid ester. The ratio of the sinterable powder to the binder in the composition is from 30 to 70% by volume of the former and from 70 to 30% by volume of the latter. The binder can be removed from the green body to be prepared by injection-moulding the composition unexpectedly rapidly without interfering with the properties of the final product sintered.Type: GrantFiled: October 18, 1989Date of Patent: July 9, 1991Assignee: Sumitomo Metal Mining Company LimitedInventors: Masakazu Achikita, Akihito Ohtsuka
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Patent number: 5028650Abstract: Boron nitride green sheets are made of boron nitride powder in an organic binder which leaves no undesirable residue upon pyrolysis in the absence of oxygen. These boron nitride green sheets can be placed on each side of the ceramic green sheet to form a composite for hot pressing ceramic green sheets containing ceramic powder to produce dense ceramic sheets suitable for electronic substrates.Type: GrantFiled: March 22, 1990Date of Patent: July 2, 1991Assignee: W. R. Grace & Co.-Conn.Inventors: Jack H. Enloe, John W. Lau, Christian B. Lundsager
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Patent number: 5017627Abstract: A composite of a homo- or co-polyolefin having an average molecular weight greater than 100,000 with from 30 to 50% by volume of a particulate inorganic solid for use in endoprosthesis.Type: GrantFiled: May 2, 1988Date of Patent: May 21, 1991Assignee: National Research Development CorporationInventors: William Bonfield, Jeremy A. Bowman, Marc D. Grynpas
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Patent number: 5013773Abstract: A thermoplastic resin composition which comprises 30 to 99 wt % of a thermoplastic resin and 1 to 70 wt % of granulated fiber formed by granulating inorganic fibers having an average fiber diameter of 0.1 to 1.0 .mu.m, an aspect ratio of 50 to 300, and an oil absorption of 400 ml/100 g and above, said granulated fiber having an average diameter of 0.5 to 5 mm and a bulk density of 0.15 to 0.4.A process for producing a thermoplastic resin composition which comprises mixing in a mixer 30 to 99 wt % of a thermoplastic resin and 1 to 70 wt % of granulated fiber formed by granulating inorganic fibers having an average fiber diameter of 0.1 to 1.0 .mu.m, an aspect ratio of 50 to 300, and an oil absorption of 400 ml/100 g and above, said granulated fiber having an average diameter of 0.5 to 5 mm and a bulk density of 0.15 to 0.4.Type: GrantFiled: December 7, 1988Date of Patent: May 7, 1991Assignee: Idemitsu Petrochemical Company LimitedInventors: Manabu Nomura, Kaoru Wada
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Patent number: 5013778Abstract: A composition comprises a carboxylic acid compound which contains at least three carbon atoms together with an organic sulphur-containing acid or salt of such an cid. The carboxylic acid may be an aliphatic diacid such as succinic acid. The sulphur-containing acid may be a sulphonic or sulphuric acid derivative such as the sodium salt of an alkyl sulphonic acid or of sulpho-succinic acid. The composition may be incorporated into an olefin polymer. The composition may be obtained by conventional powder blending or, for a polymer composition, melt blending techniques. Preferred polymer compositions have an increased clarity and a reduced level of haze compared to the polymer alone or the polymer containing only the carboxylic acid.Type: GrantFiled: March 23, 1989Date of Patent: May 7, 1991Assignee: Imperial Chemical Industries PLCInventor: Colin Bath
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Patent number: 4985480Abstract: An inorganic filler-containing polyolefin composition which comprises100 parts by weight of a polyolefin,1-100 parts by weight of an inorganic filler.0.01-1.0 part by weight of a phenolic antioxidant represented by the general formula (I) shown below, andat least one compound selected from the group consisting of the compounds represented by the general formulas (II) to (IV) shown below, and optionally 0.01-1.0 part by weight of a sulfur antioxidant and/or 0.01-2.0 parts by weight of a light stabilizer. ##STR1## wherein R.sub.1 represents an alkyl group of 1-3 carbon atoms,R.sub.2 --CO--NH--(CH.sub.2).sub.n --HN--CO--R.sub.2 (II)wherein R.sub.2 represents an alkyl group or an alkenyl group of 5-21 carbon atoms, and n is an integer of 1 to 6.R.sub.3 --COHN.sub.2 (III)wherein R.sub.3 represents an alkyl group or an alkenyl group of 5-21 carbon atoms. ##STR2## wherein R.sub.Type: GrantFiled: May 8, 1989Date of Patent: January 15, 1991Assignee: Sumitomo Chemical Company, Ltd.Inventors: Yoshiharu Fukui, Kazuhisa Kuroda
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Patent number: 4980390Abstract: A method of mixing filled thermoplastic resins containing particles of resin and filler. The method comprises preheating to about 150 degrees to 250 degrees F., at least the resin particles, and thereafter mixing until plasticized. The filler may also be preheated between 150 degrees and 350 degrees F. This method reduces the mixing time and improves the characteristics of the product.Type: GrantFiled: October 23, 1989Date of Patent: December 25, 1990Assignee: Ralph B. AndyInventors: Norman Shorr, Clarence Wright
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Patent number: 4968726Abstract: A composition of enhanced radio frequency sensitivity and a method for providing enhanced radio frequency sensitivity to a composition in which a substance suitable for enhancement of radio frequency sensitivity is admixed with a radio frequency sensitizing amount of an inorganic radio frequency sensitizer treated essentially to remove absorbed water and/or other volatiles with the radio frequency sensitizer chosen from among zinc oxide (American Process), bentonite clay, and crystalline or amorphous alkali or alkaline earth metal aluminosilicate. A process for molding using these compositions and the molded product. The composition, method for enhancing radio frequency sensitivity, process for molding and molded product with a polymeric substance, particularly ultra high molecular weight polyethylene, as the substance suitable for enhancement of radio frequency sensitivity.Type: GrantFiled: September 1, 1988Date of Patent: November 6, 1990Assignee: Phillips Petroleum CompanyInventor: Agmund K. Thorsrud
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Patent number: 4959396Abstract: The composition comprises polyolefins, fillers and a plasticizer. It contains 0.2 to 20 wt. % etoxysiloxane, 5 to 60 wt. % polyolefin, 10 to 60 wt. % white black filler, and 10 to 75 wt. % polyethyleneglycol, petroleum oil or dioctylphtalate. The polyolefin can be high-density polyethylene with a melt index at a standard charging up to 6, superhigh-molecular polyethylene, polypropylene, or a mixture of polypropylene and polyethylene, or of high-density polyethylene and super-high-molecular polyethylene at as ratio of 0 to 100 wt. parts high-density polyethylene for every 100 wt. parts super-high-molecular polyethylene. The composition is prepared by treating the filler with etoxysiloxane at room temperature, then adding the polyolefin and the plasticizer to form a mixture, and then homogenizing the mixture in a cold state or with heating. With this composition are prepared microporous separators having an average pore size of below 0.05.mu., and having high physicomechanical properties.Type: GrantFiled: January 23, 1990Date of Patent: September 25, 1990Assignee: Centralen Institute Po Chimitcheska PromishlenostInventors: Lyuben K. Yankov, Stefka K. Filipova, Ivo Y. Zlatanov, Evgeni B. Budevski
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Patent number: 4956172Abstract: A novel crystalline aluminum ammonium phosphate, characterized by predominantly equiaxed crystals, is provided of the formula: Al.sub.2 (NH.sub.4)OH(PO.sub.4).sub.2.2H.sub.2 O. The phosphate is useful as a dentifrice polishing agent and filler for plastics. The novel product can be prepared by reacting aluminum trihydroxide with diammonium orthophosphate or monobasic ammonium phosphate. By heating at elevated temperature, the product can be converted to the tridymite form of aluminum phosphate.Type: GrantFiled: August 24, 1989Date of Patent: September 11, 1990Assignee: Aluminum Company of AmericaInventor: Chanakya Misra
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Patent number: 4952617Abstract: A pigment dispersion of enhanced viscosity and heat stability characteristics for use in coating systems is provided. The pigment dispersions generally comprise a pigment carrier, a pigment of the type having a hydrophilic surface, and a surfactant functional as a dispersant in a relatively non polar matrix and which is present on the surface of the pigment in an effective amount. Pigment carriers include water-based carriers and organic solvent-based carriers. Finished coatings having improved viscosity and heat stability are also provided. The finished coatings comprise a coating base and the surfactant treated pigments. Such pigments include iron oxide pigments yellow iron oxide pigment, black iron oxide pigment, divalent ferrite pigments, zinc ferrite pigment, and magnesium ferrite pigment. Such surfactants include trimethylol propane, and trimethylol ethane.Type: GrantFiled: January 17, 1989Date of Patent: August 28, 1990Assignee: Columbian Chemicals CompanyInventors: Jorge A. Ayala, George A. Joyce
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Patent number: 4952625Abstract: A process for producing a thermoplastic ultrahigh-molecular-weight polyethylene composition having excellent moldability, which comprises mixing at room temperature to 100.degree. C. an ultrahigh-molecular-weight polyethylene having an average molecular weight of at least 2,000,000 with an amount, effective for acting as a solvent to said polyethylene and improving the flowability of the polyethylene, of a flowability improver selected from the group consisting of (a) styrene, (b) alpha-methylstyrene, (c) chlorinated styrene and (d) a mixture of (a) and (b), wherein the amount of the flowability improver is 3 to 30 parts by weight for styrene and 3 to 30 parts by weight for alpha-methylstyrene and styrene, per 100 parts by weight of the ultrahigh-molecular-weight polyethylene, and optionally admixing at least one member of the group consisting of a pigment, carbon black, a stabilizer, a lubricant and an inorganic filler.Type: GrantFiled: July 10, 1989Date of Patent: August 28, 1990Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Tomoo Shiohara, Hiroshi Abe
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Patent number: 4946641Abstract: A metallic, gold colored composition comprising an olefin polymer, a mica-based gold pigment, a mica-based bronze pigment, carbon black, and optionally, a yellow pigment is provided. Additionally, a process to produce a glossy, metallic, gold colored polyolefin product in a grit blasted mold is provided.Type: GrantFiled: December 9, 1988Date of Patent: August 7, 1990Assignee: Phillips Petroleum CompanyInventor: Majorie B. Skinner
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Patent number: 4925889Abstract: A composition stabilized against oxidative degradation comprising: a polyolefin, carbon black homogeneously incorporated in said polyolefin, a stabilizing amount of a N-phenyl-N'-(p-toluenesulfonyl)-p-phenylenediamine first stabilizer component incorporated into said polyolefin and a second stabilizer component of at least one amine antioxidant selected from the group consisting of a para-substituted aralkyl-substituted diphenylamine; a para-phenylenediamine and a polymerized dihydroquinoline incorporated into said polyolefin.Type: GrantFiled: October 26, 1988Date of Patent: May 15, 1990Assignee: Uniroyal Chemical Company, Inc.Inventors: Janet D. Capolupo, Thomas M. Chucta
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Patent number: 4920171Abstract: The invention is directed to a coating composition for application to a flushable cellulosic based waterleaf sheet to impart transitory water repellency to at least one surface of the sheet. The composition comprises between 20% by weight to about 70% by weight of relatively large particle size delaminated clay in combination with a polyethylene based polymer that has been produced by the drying of a colloidal polyethylene in water composition with the said clay.Type: GrantFiled: February 24, 1987Date of Patent: April 24, 1990Assignee: Monadnock Paper Mills, Inc.Inventors: Alexander E. Hutton, Jr., Richard E. Burke, Stanley P. Wheeler, Jr.