Ingredient Contains An -o-o- Group Patents (Class 521/96)
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Patent number: 5631304Abstract: A method of manufacturing a rigid foamed product includes the steps of mixing a metal adhesive resin, a foaming agent, a foaming accelerator, a crosslinking agent, a monomer, and a fibrous material to formulate a foamable composition, arranging the foamable composition thus formulated in a cavity of a formed metal component, and heating the metal component with the foamable composition.Type: GrantFiled: October 26, 1995Date of Patent: May 20, 1997Inventor: Itsuro Hasegawa
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Patent number: 5482978Abstract: An expandable conductive-silicone rubber composition includes (A) an organopolysiloxane having at least two alkenyl groups, (B) conductive carbon black, (C) an organic peroxide of the formula: ##STR1## wherein R.sup.2 and R.sup.3 each are a monovalent C.sub.3 -C.sub.10 hydrocarbon group or a group of --SiR.sup.4.sub.3 wherein R.sup.4 is methyl, ethyl or phenyl, X is --(CH.sub.2).sub.n --, --CH.sub.2 --C(CH.sub.3).sub.2 --CH.sub.2 -- or --(C.sub.2 H.sub.4 O).sub.m --C.sub.2 H.sub.4 -- wherein n=2 to 8 and m=1 to 4, (D) an organohydrogenpolysiloxane, (E) a platinum catalyst, and (F) a blowing agent. It is fully stable during shelf storage, has a long pot life, and is rapidly expandable and curable through hot air vulcanization into conductive silicone rubber foam having high conductivity and improved fatigue endurance of sponge cells when the foam is used as a sponge roll.Type: GrantFiled: April 27, 1995Date of Patent: January 9, 1996Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Masaharu Takahashi, Tomiyoshi Tsuchida
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Patent number: 5356941Abstract: A game ball core comprising a thermoplastic resin or blend of resins, a chemical blowing agent, a nucleating agent, peroxide crosslinking agent and other minor additives is disclosed. The molded cellular core is sufficiently durable to withstand a synthetic cover molding process at elevated temperatures.Type: GrantFiled: February 28, 1992Date of Patent: October 18, 1994Assignee: Lisco, Inc.Inventors: Michael J. Sullivan, Terence Melvin
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Patent number: 5266603Abstract: A process for the production of particulate expandable styrene polymers which have a very low benzene concentration is described using perketal and/or monoperoxycarbonate polymerization initiators. The styrene polymers produced according to the invention can be foamed to give foamed particles and molded, if desired.Type: GrantFiled: March 11, 1993Date of Patent: November 30, 1993Assignee: Huels Aktiengesellschaft - PB 15Inventor: Peter Holzmeier
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Patent number: 5266602Abstract: An expandable styrene polymer comprisinga) a styrene polymer,b) from 1 to 10% by weight, based on a), of a saturated C.sub.3 - to C.sub.6 -hydrocarbon as blowing agent, and, if desired,c) conventional assistants in effective amounts, has a benzene content of less than 1 ppm and a styrene content of less than 2000 ppm.Type: GrantFiled: November 20, 1991Date of Patent: November 30, 1993Assignee: BASF AktiengesellschaftInventors: Manfred Walter, Wolfram Husemann, Dieter Naegele
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Patent number: 5258414Abstract: The improved adhesion is provided by incorporating into an adhesive and/or sealant plastic material an effective amount of cyclodextrin or a complex of cyclodextrin and blowing agent. Where the complex of cyclodextrin and blowing agent is employed, an expandable mixture is formed.Type: GrantFiled: September 28, 1992Date of Patent: November 2, 1993Assignee: American Maize Technology, Inc.Inventor: Finn Bergishagen
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Patent number: 5246975Abstract: Blowing agent compositions for use in the production of peroxide cross-linked polyethylene foams. The improved properties and a process for the production of such foams are described.Type: GrantFiled: August 20, 1992Date of Patent: September 21, 1993Assignee: Schering Industrial Products LimitedInventors: Peter Krutki, Andrew M. Connell
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Patent number: 5240765Abstract: A silicone rubber composition comprising an organopolysiloxane and a curing agent is improved by adding a foaming agent in an amount of 0.1 to 10 parts by weight per 100 parts by weight of the organopolysiloxane. The composition is heat curable into silicone rubber films or coatings which are substantially unfoamed and tack-free on a surface.Type: GrantFiled: July 10, 1992Date of Patent: August 31, 1993Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Masaharu Takahashi, Kazuma Momii
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Patent number: 5238966Abstract: A rigid PVC foam material is made from a compound containing ingredients, such as polyvinyl chloride or vinyl chloroacetate copolymer, which is mixed with 5-50 parts by weight of ethylene vinyl acetate copolymer or ionized polyethylene resin or chloro sulfo polyethylene resin, 5-50 parts by weight of acrylobutadiene rubber or acrylic butadiene-styrene rubber or isoprene or natural rubber, 1-5 parts by weight of a stabilizer, 1-30 parts by weight of a chemical foaming agent, 0.2-5 parts by weight of a bridging agent, and 1-5 parts by weight of an extrusion-aiding agent. The mixture is extruded by a rolling machine at a temperature in a range of 100-150 degrees in Celsius and is subsequently transferred to a molding tool in which it is heated under a pressure and a temperature in a range of 120-170 degrees in Celsius for 10-60 minutes so as to bring about a foaming and bridging reaction.Type: GrantFiled: October 5, 1992Date of Patent: August 24, 1993Assignee: Ah Shun Enterprise Co., Ltd.Inventor: Jer-Wen Ou
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Patent number: 5212208Abstract: A foamable composition for in situ expansion for example in a car pillar includes a base polymer derived of ethylene and an olefinically unsaturated acrylic ester with an M1 of from 0.1 to 6 and containing from 10 to 40% of ester derived units. The composition is foamed and cross-linked to adhere to the car pillar interior and provide closed cell foam acting as a moisture-sound barrier.Type: GrantFiled: August 17, 1992Date of Patent: May 18, 1993Assignee: Exxon Chemical Patents Inc.Inventor: Jan R. Soderberg
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Patent number: 5208266Abstract: A lightly crosslinked polymer foam and a process for its production, wherein the crosslinking occurs in the extruder, which comprises melt processing an olefinic polymer, with a volatile blowing agent, a free-radical generating peroxide as a crosslinking agent, and an antioxidant as a countervailing agent.Type: GrantFiled: April 28, 1992Date of Patent: May 4, 1993Inventor: Toshimichi Yamazaki
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Patent number: 5168104Abstract: A method to prepare uniform populations of macroscopic beads containing pores of at least 0.1 microns diameter is described. The beads consist essentially of a copolymer of a monoethylenically unsaturated monomer and a crosslinking polyethylenically unsaturated monomer, said resulting copolymer optionally being derivatized with functional groups, linking moieties, and/or affinity ligands. The macroporous beads are obtained by utilizing, as porogen in the polymerization reaction, porous inorganic particles which have been preabsorbed with a blowing agent. The blowing agent is not activated until after the polymerization takes place; when the blowing agent is activated, the organic polymer which isolates the inorganic porogen particles from each other in the bead is destroyed. Upon subsequent dissolution of the inorganic porogen, a network of pores throughout the organic copolymer-formed particle is formed. The resulting beads are useful in a variety of chromatographic, analytical and biomedical techniques.Type: GrantFiled: September 13, 1991Date of Patent: December 1, 1992Assignee: Chembiomed, Ltd.Inventors: Nai-Hong Li, M. Abdul Mazid
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Patent number: 5162280Abstract: A storage stable aqueous dispersion useful in the curing of unsaturated polyester resins and the suspension polymerization of vinyl monomers containing an aromatic diacyl peroxide, an alkylene glycol and dispersion-stabilizing amounts of magnesium aluminum silicate and a cellulose ether compound is disclosed. Also disclosed are the curing of polyester resins and the suspension polymerization of vinyl monomers using the dispersion.Type: GrantFiled: October 11, 1991Date of Patent: November 10, 1992Assignee: Witco CorporationInventor: Lawrence A. Bock
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Patent number: 5134170Abstract: An acrylic rubber composition is proposed which is improved in respect of the extrusion-moldability as well as the surface slipperiness of the vulcanized article obtained therefrom. The composition comprises (a) an acrylic rubbery cooplymer which is a copolymer of a (meth)acrylic ester and a coolymerizable organosilicon compound having a silicon-bonded vinyl group in a molecule, (b) a reinforcing filler, (c) a powder of spherical particles having a specified average particle diameter and (d) an organic peroxide as a vulcanizing agent. The composition can be compounded further with a blowing agent to give a foamable rubber composition capable of being vulcanized into a spongy rubber body exhibiting excellent feeling on touch and slipperiness in contact with human skin to be useful, for example, as a material of cosmetic puffs.Type: GrantFiled: November 15, 1991Date of Patent: July 28, 1992Assignees: Nissin Chemical Industry Co. Ltd., Shin-Etsu Chemical Co., Ltd.Inventors: Hiroyuki Ohata, Harukazu Okuda, Satoshi Terasaki, Masaharu Takahashi
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Patent number: 5120385Abstract: A process for preparing a silicone sponge roll, which comprises uniformly mixing a foamable silicone composition comprising (A) a vinyl-free organopolysiloxane R.sub.a SiO.sub.(4-a)/2 wherein R is a monovalent hydrocarbon or hydroxyl group and a is 1.95 to 2.05, (B) a finely divided silica filler, (C) an azodicarbonamide foaming agent, and (D) a diacyl peroxide, thereafter extruding the composition through an extruder, and thereafter foaming and vulcanizing the composition. The silicon sponge roll produced is suitable to form a fixing roll for use in electrographic copying machines.Type: GrantFiled: April 26, 1991Date of Patent: June 9, 1992Assignee: Shin Etsu Chemical Company, Ltd.Inventors: Masaharu Takahashi, Jun Hatakeyama, Ken-ich Takita
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Patent number: 5112875Abstract: A polystyrene polymer as well as an expandable polystyrene formulation comprises a polystyrene polymer having a particular molecular weight distribution. The polymer itself exhibits a polydispersity of from about 1 to less than 2.0, a weight average molecular weight of greater than about 200,000 to about 300,000, and an M.sub.z :M.sub.n of from about 2 to less than about 3.0. Furthermore, the polystyrene polymer is branched to from 0 to less than 5 weight percent.The expandable polystyrene formulation comprises a polystyrene polymer exhibiting a polydispersity of from about 1.0 to less than 2.5, a weight average molecular weight of from greater than about 180,000 to about 300,000, an M.sub.z :M.sub.n of from about 2 to about 4.5. The polystyrene polymer is present in an amount of from about 94.5 weight percent to about 98 weight percent, based on the total weight of the formulation, and the polystyrene polymer is branched to from 0 to less than 5 weight percent.Type: GrantFiled: November 26, 1990Date of Patent: May 12, 1992Assignee: BASF CorporationInventors: Eugene K. Zimmermann, Bernhard Wagner, William E. Volz, William H. Harclerode, John V. Wiman, John C. Voss
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Patent number: 5100924Abstract: A composition comprising:(i) a blend of a homopolymer of ethylene or a copolymer of ethylene and one or more comonomers; an organopolysiloxane; optionally, a monomeric diene; and, optionally, an organic peroxide, said blend having a gel content of at least about 10 percent by weight; and(ii) a blowing agent.Type: GrantFiled: August 28, 1991Date of Patent: March 31, 1992Assignee: Nippon Unicar Company LimitedInventors: Akitak A. Senuma, Kiroku Tsukada, Nobuaki Hirose, Isao Noda
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Patent number: 5076967Abstract: Disclosed is a semiconductive rubber foam having a volume resistivity that can be controlled to a practical level and retaining an initial softness (hardness) even after the lapse of time. This semiconductor rubber foam is composed of a molded article obtained by curing and foaming a rubber composition comprising (A) 100 parts by weight of a chlorinated ethylene/.alpha.-olefin copolymer rubber and (B) 10 to 50 parts by weight of carbon black. The volume resistivity of this semiconductive rubber foam has is in the range of from 10.sup.5 to 10.sup.11 .OMEGA.-cm.Type: GrantFiled: March 12, 1991Date of Patent: December 31, 1991Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Tetsuo Tojo, Yoshiharu Kikuchi, Keiji Okada
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Patent number: 5063251Abstract: The blowing agent is a complex of cyclodextrin and guest blowing agent. Suitable guest blowing agents include water, propylene glycol and cyclohexylalamine. The blowing agent is used in structural foam and adhesives.Type: GrantFiled: May 4, 1990Date of Patent: November 5, 1991Assignee: American Maize-Products CompanyInventor: Finn Bergishagen
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Patent number: 5063095Abstract: An expandable, powder coating composition is disclosed which comprises (a) a thermoplastic resin containing a copolymer of ethylene with vinyl acetate, (b) a cross-linking agent containing an organic peroxide, (c) a blowing agent, and (d) an organic plasticizer. Powder coating of a surface of a tube or box to be used in air conditioners with the coating composition can give a heat-insulating, foamed sheath or lining over the surface.Type: GrantFiled: September 5, 1990Date of Patent: November 5, 1991Assignees: Somar Corporation, Nippondenso Co., Ltd.Inventors: Katsuji Kitagawa, Kazutomo Moriguchi, Tetsuo Miyake, Katusya Sano, Kiyoshi Kittaka, Tetsuya Sakakibara
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Patent number: 5061736Abstract: The foamable silicone rubber composition is capable of giving a cured silicone rubber body having a cellular structure and suitable for use as a very reliable fire-resistant joint-sealing member in buildings. In addition to the rather conventional constituents essential in a foamable silicone rubber composition of prior art including (a) a diorganopolysiloxane, (b) a finely divided reinforcing silica filer, (f) a curing agent and (g) a blowing agent, the foamed silicone rubber body obtained by curing the inventive composition is imparted with very reliable fire resistance by virtue of the synergistic effect of the characteristic ingredients including (c) a ferrite powder, (d) a finely divided inorganic material or, in particular, mica flakes, and (e) a platinum compound, in combination, each in a specified amount.Type: GrantFiled: May 6, 1991Date of Patent: October 29, 1991Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Masaharu Takahashi, Jun Hatakeyama
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Patent number: 5057479Abstract: A storage stable aqueous dispersion useful in the curing of unsaturated polyester resins and the suspension polymerization of vinyl monomers containing an aromatic diacyl peroxide, an alkylene glycol and dispersion-stabilizing amounts of magnesium aluminum silicate and a cellulose ether compound is disclosed. Also disclosed are the curing of polyester resins and the suspension polymerization of vinyl monomers using the dispersion.Type: GrantFiled: February 1, 1991Date of Patent: October 15, 1991Assignee: Witco CorporationInventor: Lawrence A. Bock
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Patent number: 5041466Abstract: An efficient method for the preparation of a foamed and cured silicone rubber body having a uniform fine-cellular structure, in which a foamable silicone rubber composition is prepared by uniformly compounding a diorganopolysiloxane, finely divided silica filler, titanium dioxide powder, blowing agent and curing agent, each in a specified weight proportion, and irradiating the thus prepared composition with microwaves having a frequency of 900 to 5000 MHz which, by virtue of the titanium dioxide powder having a high dielectric constant, are efficiently absorbed and converted to heat, whereby the composition is evenly heated throughout the body to cause uniform foaming and curing.Type: GrantFiled: September 17, 1990Date of Patent: August 20, 1991Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Masaharu Takahashi, Jun Hatakeyama
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Patent number: 4983642Abstract: The invention provides a foamable silicon rubber composition capable of giving a foamed and cured silicone rubber body which exhibits, different from conventional foamed silicone rubbers, a retarded and controlled rate of elastic recoverty from a compressed state when the compressive force is released so as to be useful for certain applications. This unique characteristic of the foamed silicon rubber can be obtained by formulating the composition, besides conventional ingredients, a low molecular-weight organopolysiloxane represented by the general formula HO--(--SiR.sup.1.sub.2 --O--).sub.m --(--SiMe.sub.2 --O--).sub.n --H, in which Me is a methyl group, R.sup.1 is an unsubstituted or substituted monovalent hydrocarbon group, at least one of the groups denoted by R.sup.1 in each of the units of the formula --SiR.sup.1.sub.Type: GrantFiled: June 6, 1990Date of Patent: January 8, 1991Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Akio Nakano, Hirosi Takei
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Patent number: 4959397Abstract: Soft and low-density foam materials, obtained by means of an extrusion expansion (with physical blowing agents) of particular copolymers of ethylene with vinylacetate (and/or with alkyl esters of acrylic or methacrylic acid), are found to be very suitable for the manufacture of expanded articles with little shrinkage after expansion, free from creases on the surface or cracks on the cell walls, and having excellent characteristics, higher compressive strength and so on.Type: GrantFiled: April 13, 1989Date of Patent: September 25, 1990Assignee: Montedipe S.p.A.Inventors: Corrado Brichta, Annibale Vezzoli, Angelo Borghi
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Patent number: 4952609Abstract: Acryl rubber foaming compositions comprising (A) an acrylic polymer prepared by copolymerizing an acrylate or methacrylate with a monomer having at least two aliphatic unsaturated bonds per molecule, (B) a pyrolytic organic foaming agent, and (C) an organic peroxide can be molded, cured and foamed into acryl rubber foams having improved heat insulation, heat resistance, weatherability, crack resistance, and oil resistance without a need for sulfur vulcanizer.Type: GrantFiled: February 7, 1990Date of Patent: August 28, 1990Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Motoo Fukushima, Masaharu Takahashi, Kunio Itoh
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Patent number: 4952620Abstract: Sterically hindered cyclic amines which are substituted by a photoactivatable acyl group at the basic nitrogen atom can be deacylated by irradiation with UV light. This is advantageous if the basicity of the amines proves troublesome during application. Examples of such photoactivatable acyl groups are phenylglyoxyl, phenylacetyl or naphthylacetyl groups.Type: GrantFiled: August 12, 1988Date of Patent: August 28, 1990Assignee: Ciba-Geigy CorporationInventors: Godwin Berner, Mario Slongo
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Patent number: 4946871Abstract: Soft and low-density foam materials, obtained by means of an extrusion expansion (with physical blowing agents) of particular copolymers of ethylene with vinylacetate (and/or with alkyl esters of acrylic or methacrylic acid), are found to be very suitable for the manufacture of expanded articles with little shrinkage after expansion, free from creases on the surface or cracks on the cell walls, and having excellent characteristics, higher compressive strength and so on.Type: GrantFiled: December 19, 1989Date of Patent: August 7, 1990Assignee: Montedipe S.p.A.Inventors: Corrado Brichta, Annibale Vezzoli, Angelo Borghi
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Patent number: 4940735Abstract: The present invention deals with a novel blowing agent masterbatch for the preparation of polystyrene foams, comprising:(a) 30 to 80 weight percent of a plasticizer-containing polystyrene having a Vicat softening temperature between 30.degree. and 50.degree. C.;(b) 20 to 70 weight percent of blowing agent based on solid organic acids and alkali metal (bi) carbonates; and optionally(c) 10 to 20 weight percent of cell regulators.Type: GrantFiled: March 23, 1989Date of Patent: July 10, 1990Assignee: BASF AktiengesellschaftInventor: Gerhard Kress
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Patent number: 4940732Abstract: A storage stable aqueous dispersion useful in the curing and foaming of unsaturated polyester resins comprising an aromatic diacyl peroxide, an alkali metal carbonate or bicarbonate, dispersion-stabilizing amount of magnesium aluminum silicate and an alkali metal carboxymethyl cellulose, glycerol and water. As an optional component this composition can also contain an anionic dispersing agent. Also disclosed is the preparation of foamed polyester resins using the dispersion.Type: GrantFiled: November 30, 1989Date of Patent: July 10, 1990Assignee: Witco CorporationInventors: Ronald L. Pastorino, Lawrence A. Bock
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Patent number: 4931485Abstract: Disclosed herein is a foamable organopolysiloxane composition which comprises an organopolysiloxane base polymer containing a vinyl group-containing organopolysiloxane, organohydroxypolysiloxane, and organohydrogenpolysiloxane, and a specific siloxane copolymer containing an alkenyloxysilyl group. The composition readily foams and cures at room temperature to give a silicone rubber foam of high strength, which is useful as a filler and sealant for buildings.Type: GrantFiled: September 9, 1988Date of Patent: June 5, 1990Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yoshio Inoue, Atsushi Yaginuma
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Patent number: 4916165Abstract: A heat-foamable crosslinked propylene resin composition in the form of a melt-shaped sheet structure comprising[1] 100 parts by weight of a crosslinked propylene resin composition obtained by mixing at least four components composed of (A) a propylene resin, (B) an olefin resin other than the resin (A), (C) a radical initiator and (D) a crosslinking agent, and[2] 0.5 to 5 parts by weight of a blowing agent; wherein(a) the propylene resin (A) is in an amount of 60 to 95 parts by weight per 100 parts by weight of the resins (A) and (B) combined, and has a melt flow rate (MFR) of 0.1 to 50 g/10 min.Type: GrantFiled: May 1, 1989Date of Patent: April 10, 1990Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Takashi Hashimoto, Zenichi Sasaki
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Patent number: 4892854Abstract: A storage stable aqueous dispersion useful in the curing and foaming of unsaturated polyester resins comprising an aromatic diacyl peroxide, an alkali metal carbonate or bicarbonate, dispersion-stabilizing amount of magnesium aluminum silicate and an alkali metal carboxymethyl cellulose, glycerol and water. As an optional component this composition can also contain an anionic dispersing agent. Also disclosed is the preparation of foamed polyester resins using the dispersion.Type: GrantFiled: January 5, 1989Date of Patent: January 9, 1990Assignee: Witco CorporationInventors: Ronald L. Pastorino, Lawrence A. Bock
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Patent number: 4870114Abstract: A heat-foamable crosslinked propylene resin composition in the form of a melt-shaped sheet structure comprising[1] 100 parts by weight of a crosslinked propylene resin composition obtained by mixing at least four components composed of (A) a propylene resin, (B) an olefin resin other than the resin (A), (C) a radical initiator and (D) a crosslinking agent, and[2] 0.5 to 5 parts by weight of a blowing agent; wherein(a) the propylene resin (A) is in an amount of 60 to 95 parts by weight per 100 parts by weight of the resins (A) and (B) combined, and has a melt flow rate (MFR) of 0.1 to 50 g/10 min.Type: GrantFiled: January 23, 1986Date of Patent: September 26, 1989Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Takashi Hashimoto, Zenichi Sasaki
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Patent number: 4867923Abstract: Process of producing a foamed product by forming a shaped article from a composition comprising a thermoplastic olefin polymer, a hydrolyzable, unsaturated silane, a gas generating compound and an organic peroxide in an amount of about 0.5 to about 2 percent by weight, and thereafter subjecting the shaped article to elevated temperatures to activate the gas generating compound and organic peroxide.Type: GrantFiled: December 21, 1984Date of Patent: September 19, 1989Assignee: Union Carbide CorporationInventors: Barry Topcik, Austin E. Barnabeo
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Patent number: 4847150Abstract: A foam of a polyolefin/polystyrene resin mixture obtained by mixing a polyolefin resin and a polystyrene resin in the presence of a hydrogenated styrene/butadiene block copolyer, and subjecting the resultant mixed resinous composition to extrusion foaming, wherein;(1) said hydrogenated styrene/butadiene block copolymer comprises, as components before hydrogenation, 10 to 38% by weight of styrene and butadiene with a content of 1,2-bond type butadiene of 20 to 50% by weight based on butadiene, and;(2) said foam comprises a thin surface skin portion showing a value of 0.65 or more of the surface structural index S represented by the following formula:S=t/T.gtoreq.0.65wherein t and T each represent a total light-transmission evaluated according to the method of ASTM D1003 with respect to a surface skin layer and an inner layer of the foam,is found to have the cushioning properties (or the foam properties) that enables elastic cushioning of a large load.Type: GrantFiled: January 29, 1988Date of Patent: July 11, 1989Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventor: Noboru Takeda
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Patent number: 4748190Abstract: The invention is a process for making a high surface area, self-supporting catalyst suitable for use as an acid catalyst comprising:(a) at least partially polymerizing a perfluorinated monomer containing ion exchange groups convertible to an acid or salt form in a medium containing a gas-forming ingredient(s) which is present during polymerization and serves a polymerization enhancement purpose during polymerization; wherein the said gas-forming ingredient(s) is a material that will convert into a gaseous state and expand when heated; and(b) heating the polymer to a temperature sufficient to soften the polymer and sufficient to convert at least a portion of the gas-forming ingredient(s) into a gaseous state while the polymer is still in contact with at least a portion of the gas-forming ingredient(s), thereby converting the gas-forming ingredient(s) into a gas which expands the polymer and causes the formation of open and closed pores within the polymer.Type: GrantFiled: December 24, 1985Date of Patent: May 31, 1988Assignee: The Dow Chemical CompanyInventor: William P. Carl
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Patent number: 4734440Abstract: A foamable composition comprising a polymer selected from the group consisting of a hydrolyzable ethylene/silane copolymer and a hydrolyzable ethylene/ethyl acrylate/silane terpolymer and the following components in about the following amounts per 100 parts by weight of polymer:______________________________________ Component Parts by Weight ______________________________________ azodicarbonamide 1 to 25 p,p'oxybis-benzene 0.5 to 3.5 sulfonyl hydrazide silanol condensation catalyst 0.02 to 0.Type: GrantFiled: December 18, 1986Date of Patent: March 29, 1988Assignee: Union Carbide CorporationInventor: Barry Topcik
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Patent number: 4711909Abstract: A storage stable aqueous dispersion useful in the curing and foaming of unsaturated polyester resins containing an aromatic diacyl peroxide, an alkali metal carbonate or bicarbonate and dispersion-stabilizing amounts of magnesium aluminum silicate and an alkali metal carboxymethyl cellulose. Also disclosed is the preparation of foamed polyester resins using the dispersion.Type: GrantFiled: April 3, 1987Date of Patent: December 8, 1987Assignee: Witco CorporationInventors: Ronald L. Pastorino, Lawrence A. Bock
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Patent number: 4701472Abstract: A crosslinked polyvinyl chloride resin composition comprising:A: a polyvinyl chloride resin,B: at least one copolymer selected from the group consisting of ethylene/acrylic acid copolymers, ethylene/alkyl acrylate copolymers and ethylene/alkyl methacrylate copolymers, andC: a polyolefin resin and having a high expansion ratio, and a foam sheet prepared from the composition.Type: GrantFiled: February 24, 1987Date of Patent: October 20, 1987Assignee: Toray Industries, Inc.Inventors: Mamoru Koebisu, Takeshi Nishioka, Nario Kamijyukkoku, Hirosi Kawano
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Patent number: 4692427Abstract: A storage stable aqueous dispersion useful in the curing and foaming of unsaturated polyester resins containing an aromatic diacyl peroxide, an alkali metal carbonate or bicarbonate and dispersion-stabilizing amounts of magnesium aluminum silicate and an alkali metal carboxymethyl cellulose. Also disclosed is the preparation of foamed polyester resins using the dispersion.Type: GrantFiled: November 25, 1986Date of Patent: September 8, 1987Assignee: Witco CorporationInventors: Ronald L. Pastorino, Lawrence A. Bock
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Patent number: 4683248Abstract: Optionally nucleo-substituted styrene polymers are crosslinked at temperatures above 110.degree. C. with combinations of crosslinkage promoters containing at least two polymerizable C--C double or C--C triple bonds in the molecule, and organic peroxides (with the exception of hydroperoxides, peracids, and ketone peroxides) having a 10 hour halflife temperature below 106.degree. C.Type: GrantFiled: October 2, 1985Date of Patent: July 28, 1987Assignee: Luperox GmbHInventors: Kurt Rauer, Angelika Orner
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Patent number: 4680317Abstract: An expandable molding composition for the production of a cross-linked foam material, and a process for the manufacture of the foam from a mixture of polyolefin and a selected, partially crystalline ethylene-propylene terpolymer, a blowing agent, and optionally a crosslinking agent are disclosed.Type: GrantFiled: April 29, 1985Date of Patent: July 14, 1987Assignee: Dynamit Nobel AktiengesellschaftInventors: Werner Kuhnel, Paul Spielau
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Patent number: 4680318Abstract: A foaming resin composition comprising an unsaturated random copolymer consisting of propylene, ethylene, and a branched 1,4-diene represented by the following formula: ##STR1## wherein R.sup.1 represents an alkyl group having not more than 8 carbon atoms; and R.sup.2 and R.sup.3 each represents a hydrogen atom or an alkyl group having not more than 8 carbon atoms, provided that R.sup.2 and R.sup.3 do not simultaneously represent a hydrogen atom, and a chemical foaming agent. The composition is prevented from increasing in temperature due to shearing during molding into a foamable sheet and, therefore, provides a uniform foamed product.Type: GrantFiled: November 7, 1986Date of Patent: July 14, 1987Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Masaki Fujii, Shiroh Gotoh, Hideaki Nakagawa, Ryoichi Ito
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Patent number: 4659746Abstract: Olefin polymer foams having improved cell structures and relatively smooth outer surfaces produced by foaming a composition containing a thermoplastic olefin polymer, p,p'-oxybis-benzene sulfonyl hydrazide, a monomeric acrylate ester of a polyhydric compound and an organic peroxide. These foams can be formed into shaped articles of desired configuration by conventional thermoforming molding techniques.Type: GrantFiled: December 12, 1985Date of Patent: April 21, 1987Assignee: Union Carbide CorporationInventor: Barry Topcik
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Patent number: 4657938Abstract: A sprayable and foamable insulating composition comprising: (A) at least one low molecular weight polymer selected from the group consisting of ethylene/alphaolefin copolymer, ethylene/alphaolefin/nonconjugated polyene terpolymer, polyacrylate, polymethacrylate, polyisoprene, polyacrylonitrile, polymethacrylonitrile and polybutadiene; (B) an effective amount of curative; and (C) an effective amount of a blowing agent having an activation temperature which is less than or about equal to the curing temperature of component (B), said composition having a Brookfield viscosity of about 100,000 centipoise or less at shear rates of 5 sec.sup.-1 or greater. A process for providing a layer of insulating foam employing such composition is also disclosed.Type: GrantFiled: August 26, 1985Date of Patent: April 14, 1987Assignee: Uniroyal Chemical Company, Inc.Inventors: Luke E. Fithian, Frank C. Cesare
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Patent number: 4652588Abstract: A polymer foam made from a blend of a low density ethylenic polymer and styrenic polymer utilizing a volatile blowing agent and a free radical generating compound as a crosslinking agent. The free radical generating compound provides light crosslinking and increases the foamability of the polymer blend.Type: GrantFiled: May 2, 1986Date of Patent: March 24, 1987Assignee: The Dow Chemical CompanyInventor: Chung P. Park
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Patent number: 4636528Abstract: Low density foams are prepared from an admixture which comprises an unsaturated polyester resin, a free radical initiator which initiator is activated at temperatures from about 100.degree. to about 400.degree. F., and a compound selected from a t-alkylhydrazinium salt or a carbonylhydrazine. The low density foams have uniform cell structure without cracks or voids and the process is efficient.Type: GrantFiled: May 21, 1986Date of Patent: January 13, 1987Assignee: Pennwalt CorporationInventors: Ernest R. Kamens, John P. Cassoni
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Patent number: 4617324Abstract: Novel processes and compositions are provided for the preparation of foamed, cross-linked polyethylene utilizing di(alkylperoxy)acetylene cross-linking/blowing agents. The novel compositions include esters of thiodipropionic acid as activators.Type: GrantFiled: October 22, 1985Date of Patent: October 14, 1986Assignee: U.S. Peroxygen CompanyInventors: John R. Muenchow, Lawrence A. Bock, Roger N. Lewis
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Patent number: 4614753Abstract: A method for producing foam polyolefin products which are light-stable and weather-resistant are obtained by the combined use of the following stabilizers:(a) phenolic antioxidants,(b) substituted benzophenones and/or substituted benzotriazoles, and(c) sterically hindered amines.Type: GrantFiled: February 14, 1986Date of Patent: September 30, 1986Assignee: Dynamit Nobel AGInventors: Werner Kuhnel, Paul Spielau