Ingredient Is A Heterocyclic Compound Patents (Class 521/90)
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Patent number: 4393147Abstract: An improved expandable polymeric styrene particle is provided containing a blowing agent and a minor amount of ethylene-bis-stearamide and dibromoethyldibromocyclohexane. The improved particle results in a significantly reduced final mold cooling cycle in producing the finished molded article. Ethylene-bis-stearamide and dibromoethyldibromocyclohexane can be incorporated during impregnation with the blowing agent or by blending with the expandable particles after impregnation.Type: GrantFiled: November 22, 1982Date of Patent: July 12, 1983Assignee: Cosden Technology, Inc.Inventor: Richard A. Schwarz
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Patent number: 4393146Abstract: Fire retardant, expanded styrene polymer shaped objects are perpared by:(a) mixing styrene monomer or a mixture thereof with at least one comonomer, an expanding agent and a fire retardant, organic halogen compound in a aqueous dispersion;(b) adding to (a) either before or during polymerization from about 0.0001 to 0.1 percent by weight esters soluble in the organic phase of (a), these esters of aliphatic dicarboxylic acids and aliphatic epoxy alcohols having at least 11 carbon atoms;(c) polymerizing the aqueous dispersion of (a) and (b) using radical forming initiators at a temperature of about 80.degree. to 130.degree. C.;(d) separating bead polymers having diameters between about 0.4 and 3 mm;(e) pre-foaming the beads;(f) ageing the pre-foamed beads; and(g) final forming the aged and pre-foamed beads in a pressure resistant mold.Type: GrantFiled: May 20, 1982Date of Patent: July 12, 1983Assignee: Chemische Werke Huls AGInventors: Josef K. Rigler, Ekkehard Wienhofer, Horst Leithauser, Karl Trukenbrod
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Patent number: 4386129Abstract: This invention relates to porous films having pores with polygonal cross sections and average pore diameters of about 3 to about 100 microns and the method for preparing these films. More particularly this invention relates to a porous film having pores with polygonal cross sections and average pore diameters of about 3 to about 100 microns formed from a resinous polymer of propylene and the process for forming the film which comprises the steps of (a) forming a film containing beta-spherulites and (b) selectively extracting the beta-spherulites.Type: GrantFiled: March 31, 1981Date of Patent: May 31, 1983Assignee: Standard Oil Company (Indiana)Inventor: Philip Jacoby
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Patent number: 4384049Abstract: In the manufacture of bodies of foamed plastic material, a polymeric synthetic resin base material is mixed with a cross-linking agent, a foaming agent and at least one further additive. The resulting mixture is shaped without a decomposition of the cross-linking and foaming agent and is subsequently heated to effect cross-linking and foaming. In order to obtain bodies of foamed plastic materials which owing to their high flexibility and low flammability are particularly suitable as heat-insulating materials in buildings, the base material consists only of a chlorinated polyethylene resin or a mixture of such resins and heat-stabilizing agents known for use with halogen-containing polymers are incorporated in the mixture.Type: GrantFiled: April 13, 1981Date of Patent: May 17, 1983Assignee: Kunststoffwerk Karl EggerInventor: Karl Rametsteiner
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Patent number: 4377694Abstract: New hydroxyalkyl-1,2,4-triazolidine-3,5-diones corresponding to the general Formula I ##STR1## in which R.sup.1 represents a monofunctional to pentafunctional organic radical, optionally substituted and/or optionally interrupted by hetero atoms or hetero atom groups,R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same or different and represent hydrogen, an aliphatic C.sub.1 -C.sub.1 O-radical, a cycloaliphatic C.sub.4 -C.sub.8 radical or an araliphatic C.sub.7 -C.sub.17 -radical, said radicals are optionally substituted by halogen, an aromatic C.sub.6 -C.sub.16 -radical or an aromatic C.sub.6 -C.sub.16 -radical substituted by halogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, a and b are the same or different and represent a number of from 1 to 30, and n=a number of from 1 to 5.The new compounds are obtained by oxalkylation reaction using 1,2,4-triazolidine-3,5-diones of Formula I as starting materials in which a and b represent the number 0.Type: GrantFiled: June 29, 1981Date of Patent: March 22, 1983Assignee: Bayer AktiengesellschaftInventors: Henning Giesecke, Rudolf Merten, Ludwig Rottmaier
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Patent number: 4351911Abstract: A foamable thermoplastic injection moldable composition comprising in admixture (a) a polyester resin, (b) a filler selected from the group consisting of fibrous glass or a mineral or mixtures thereof in an amount of from about 5 to about 50 weight percent, and (c) a minor amount of foaming agent.Type: GrantFiled: August 1, 1980Date of Patent: September 28, 1982Assignee: General Electric CompanyInventor: Daniel W. Fox
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Patent number: 4343912Abstract: The present invention pertains to a method for reducing the processing temperature of a thermoplastic polymer comprising blending the thermoplastic polymer in powder form with an effective amount of a compound having a softening temperature of about 20.degree. to 200.degree. C. lower than the softening temperature of the thermoplastic polymer. The invention further pertains to novel chemical blowing agent concentrates.Type: GrantFiled: September 21, 1981Date of Patent: August 10, 1982Assignee: Mobay Chemical CorporationInventor: In C. Lim
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Patent number: 4338246Abstract: Thermoplastic polymethacrylate compositions comprising (a) thermoplastic polymethacrylate such as polymethyl methacrylate, a pentate salt of an amino-s-triazine, and optionally a polyol are flame retardant and intumescent and may be compounded to be self-extinguishing.Type: GrantFiled: August 21, 1981Date of Patent: July 6, 1982Assignee: Borg-Warner Chemicals, Inc.Inventor: Yuval Halpern
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Patent number: 4338245Abstract: Thermoplastic polyester compositions comprising a polyester such as polybutylene terephthalate, a pentate salt of an amino-s-triazine, and optionally a polyol are flame retardant and intumescent and may be compounded to be self-extinguishing.Type: GrantFiled: August 12, 1981Date of Patent: July 6, 1982Assignee: Borg-Warner Chemicals, Inc.Inventor: Yuval Halpern
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Patent number: 4336184Abstract: Thermoplastic polyphenylene ether compositions comprising a polyphenylene ether-styrenic resin blend, a pentate salt of an amino-s-triazine and optionally a polyol are flame retardant and intumescent and may be compounded to be self-extinguishing.Type: GrantFiled: August 12, 1981Date of Patent: June 22, 1982Assignee: Borg-Warner Chemicals, Inc.Inventor: Yuval Halpern
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Patent number: 4334030Abstract: Foamable blends are provided of high performance thermoplastic polymers such as polyphenylene oxides, polystyrenes, etc., and an effective amount of a first blowing agent which is an amide derivative of azodicarboxylic acid and a second blowing agent which is a dihydrooxadiazinone.Type: GrantFiled: November 23, 1979Date of Patent: June 8, 1982Assignee: General Electric CompanyInventor: John E. Kochanowski
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Patent number: 4330495Abstract: A novel method of making foamed, crosslinked low density polyethylene utilizing as dual crosslinking/blowing agents, organic peroxides of the formula: ##STR1## where each R is a t-alkyl group bonded through its tertiary carbon atom and having 4-8 carbon atoms; and R' is an alkyl group of 1-6 carbon atoms.Type: GrantFiled: February 23, 1981Date of Patent: May 18, 1982Assignee: U.S. Peroxygen CompanyInventors: Reidar Halle, Roger N. Lewis, John R. Muenchow
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Patent number: 4313873Abstract: The present invention pertains to a method for reducing the processing temperature of a thermoplastic polymer comprising blending the thermoplastic polymer in powder form with an effective amount of a compound having a softening temperature of about 20.degree. to 200.degree. C. lower than the softening temperature of the thermoplastic polymer. The invention further pertains to novel chemical blowing agent concentrates.Type: GrantFiled: June 18, 1979Date of Patent: February 2, 1982Assignee: Mobay Chemical CorporationInventor: In C. Lim
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Patent number: 4288560Abstract: A process for foaming thermoplastic materials by adding to the plastics material 0.05 to 5 percent by weight of a dioxazolone of the formula I ##STR1## in which n is 1, 2 or 3, and when n is 1R is C.sub.1 -C.sub.12 -alkyl, C.sub.2 -C.sub.12 -alkenyl, C.sub.7 -C.sub.9 -aralkyl, C.sub.3 -C.sub.6 -cycloalkyl, C.sub.6 -C.sub.10 -aryl, or phenyl substituted by C.sub.1 -C.sub.9 -alkyl, halogen, C.sub.1 -C.sub.9 -alkoxy or nitro, or it is a heterocyclic radical, or when n is 2R is C.sub.1 -C.sub.8 -alkylene, ethenylene, m- or p-phenylene, m- or p-halophenylene, biphenylene, oxy-bis-(p-phenylene), 2,5-thienylene, 2,5-furylene, 2,6-pyridylene or naphthylene, or when n is 3R is phenenyl,and subsequently heating the mixture.Type: GrantFiled: August 25, 1980Date of Patent: September 8, 1981Assignee: Ciba-Geigy CorporationInventors: Rudolf Kirchmayr, Werner Fussenegger, Hugo Illy
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Patent number: 4288561Abstract: A foamable thermoplastic injection moldable composition comprising in admixture (a) a polyester resin, (b) a filler selected from the group consisting of fibrous glass or a mineral or mixtures thereof in an amount of from about 5 to about 50 weight percent and (c) a minor amount of a foaming agent. The compositions can also include flame retardant additives.Type: GrantFiled: February 22, 1978Date of Patent: September 8, 1981Assignee: General Electric CompanyInventors: Donald I. Craft, Morton Kramer
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Patent number: 4280005Abstract: A foamable flame-retardant thermoplastic injection moldable composition comprising in admixture (a) a polyester resin, (b) a filler selected from the group consisting of fibrous glass or a mineral or mixtures thereof in an amount of from about 5 to about 50 weight percent, (c) a flame-retardant additive and (d) a minor amount of a foaming agent.Type: GrantFiled: September 24, 1979Date of Patent: July 21, 1981Assignee: General Electric CompanyInventor: Daniel W. Fox
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Patent number: 4278769Abstract: A blowing agent concentrate comprising a chemical blowing agent and a thermoplastic composition vehicle therefore, said thermoplastic composition being a saturated polyester and/or copolyester having a crystalline melting point between 100.degree. C. and 220.degree. C. and a reduced viscosity of 0.4 dl/g to 1.6 dl/g; the use of such blowing agent concentrate in the formation of foamed articles of high molecular weight polyalkyleneterephthalate which articles can be filled and/or reinforced and/or flame proofed and can contain other additives. Particularly contemplated is the use of such blowing agent concentrate in the formation of glass fiber reinforced structural foam moldings of polyalkyleneterephthalates especially polytetramethylene terephthalates.Type: GrantFiled: February 21, 1979Date of Patent: July 14, 1981Assignee: Dynamit Nobel AGInventors: Peter Gebauer, Karl G. Sturm
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Patent number: 4276247Abstract: Novel processes and compositions are provided for the preparation of foamed, crosslinked polyethylene utilizing cyclic peroxyketal crosslinking/blowing agents. The novel compositions include esters of thiodipropionic acid as activators.Type: GrantFiled: February 19, 1980Date of Patent: June 30, 1981Assignee: Argus Chemical CorporationInventors: John R. Muenchow, Ronald L. Pastorino, Reidar Halle, Roger N. Lewis
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Patent number: 4272583Abstract: Particulate expandable styrene polymers which contain an organic bromine compound as the flameproofing agent and an organic compound possessing a labile C--C, O--O or N.dbd.N bond as the synergistic agent for flameproofing. The flameproofing agent is applied to the surface of the particles while the synergistic agent is homogeneously incorporated into the particles.The polymers can be converted to self-extinguishing foams.Type: GrantFiled: July 21, 1980Date of Patent: June 9, 1981Assignee: BASF AktiengesellschaftInventors: Klaus Hahn, Herbert Naarmann, Klaus Penzien, Heinz Weber
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Patent number: 4266040Abstract: A reaction product of (1) resin containing a plurality of electron deficient ethylenically unsaturated groups and (2) a polyazlactone. The product may be formed without the liberation of a gas and cured at a higher temperature with the liberation of a gas to thereby form foamed product.Type: GrantFiled: June 27, 1980Date of Patent: May 5, 1981Assignee: DeSoto, Inc.Inventor: Shiow-Ching Lin
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Patent number: 4264469Abstract: Thermoplastic resin foams such as polyethylene foams having excellent appearance can be produced with high foaming stability by using a blowing agent composition comprising (a) azodicarbonamide, (b) dinitrosopentamethylenetetramine, and (c) a phenolic or propionate compound such as 1,3,5-tris(3,5-di-t-butyl-4-hydroxybenzyl)-s-triazine-2-4-6-(1H, 3H, 5H)trion.Type: GrantFiled: July 23, 1979Date of Patent: April 28, 1981Assignee: Hitachi Chemical Company, Ltd.Inventors: Yutaka Yamaguchi, Atsuo Sasama
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Patent number: 4258138Abstract: Method of foaming thermoplastic polymeric materials using as blowing agents polycyclic fused ring heterocycles containing the tetrazole moiety.Type: GrantFiled: October 15, 1979Date of Patent: March 24, 1981Assignee: The Dow Chemical CompanyInventor: Thomas C. Britton
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Patent number: 4247412Abstract: A blowing composition comprising azodicarbonamide, a zinc peroxide and a decomposition inhibitor for azodicarbonamide.Type: GrantFiled: April 17, 1979Date of Patent: January 27, 1981Assignee: Otsuka Kagaku Yakuhin Kabushiki KaishaInventors: Shigeaki Ohno, Nobuyuki Aburatani, Nobuyuki Ueda
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Patent number: 4246359Abstract: Fire retarded compositions comprise elastomers derived from conjugated, hydrocarbon dienes in combination with a synergistic, three-component flame retardant system comprising (1) a chlorine- and/or bromine-containing fire-retardant additive, (2) alumina trihydrate and (3) an iron oxide.Type: GrantFiled: July 5, 1979Date of Patent: January 20, 1981Assignee: Uniroyal, Inc.Inventor: William P. Whelan
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Patent number: 4220730Abstract: A crosslinked, soft, flexible, closed-cell foam of chlorinated high density polyethylene and a process for the preparation thereof, comprising admixing a high density chlorinated polyethylene with a thermally decomposable chemical foaming agent at a temperature below the decomposition temperature of said foaming agent, molding the chlorinated high density polyethylene into desired form at a temperature below the decomposition temperature of the foaming agent, subjecting the molded chlorinated high density polyethylene to irradiation cross-linking at a temperature below the decomposition temperature of said foaming agent and contacting, in a substantially oxygen-free environment, the crosslinked chlorinated high density polyethylene with a heat transfer medium maintained at a temperature of from about 150.degree. C. to about 350.degree. C. for a period sufficient to form the desired product.Type: GrantFiled: October 16, 1978Date of Patent: September 2, 1980Assignee: The Dow Chemical CompanyInventor: Brenton S. Coyne
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Patent number: 4218511Abstract: Particulate self-extinguishing thermoplastic molding compositions based on styrene polymers containing volatile blowing agents are surface-coated with an organic bromine compound and, to stabilize the bromine compound against photodegradation, a N-hydroxyphenylbenzotriazole or a hydroxybenzophenone. The molding compositions may be used for the manufacture of foams by expanding the blowing agents at elevated temperatures.Type: GrantFiled: December 1, 1978Date of Patent: August 19, 1980Assignee: BASF AktiengesellschaftInventors: Klaus Hahn, Manfred Walter, Karl Stange, Heinz Weber
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Patent number: 4209473Abstract: A crosslinked, soft, flexible, closed-cell foam of suspension chlorinated high density polyethylene and a process for the preparation thereof, comprising admixing a high density suspension chlorinated polyethylene with a thermally decomposable chemical foaming agent at a temperature below the decomposition temperature of said foaming agent, molding the chlorinated high density polyethylene into desired form at a temperature below the decomposition temperature of the foaming agent, subjecting the molded chlorinated high density polyethylene to irradiation crosslinking at a temperature below the decomposition temperature of said foaming agent and contacting, in a substantially oxygen-free environment, the crosslinked chlorinated high density polyethylene with a heat transfer medium maintained at a temperature of from about 150.degree. C. to about 350.degree. C. for a period sufficient to form the desired product.Type: GrantFiled: January 4, 1979Date of Patent: June 24, 1980Assignee: The Dow Chemical CompanyInventor: Brenton S. Coyne
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Patent number: 4208486Abstract: Organic amides, solutions of polymers thereof, which polymers are subject to hydrolysis and degradation in the presence of amines, and polymers isolated therefrom are stabilized by the presence of aromatic sulfonic acid esters of aliphatic, arylaliphatic and alicyclic alcohols and polyols.Type: GrantFiled: December 8, 1978Date of Patent: June 17, 1980Assignee: Exxon Research & Engineering Co.Inventor: Tad L. Patton
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Patent number: 4201705Abstract: Polyolefin compositions comprising a polyolefin and a flame retarding amount of the pentate salt of an amino-s-triazine are intumescent and self-extinguishing and non-dripping.Type: GrantFiled: August 28, 1978Date of Patent: May 6, 1980Assignee: Borg-Warner CorporationInventors: Yuval Halpern, Clifton T. Fleenor
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Patent number: 4192922Abstract: The invention provides finely grained, expandable particles of a styrene homopolymer or copolymer which contain an expanding agent and a flameproofing organic halogen compound as well as, in addition a 2,4-diamino-1,3,5-triazine derivative.Type: GrantFiled: February 21, 1979Date of Patent: March 11, 1980Assignee: Hoechst AktiengesellschaftInventors: Johann Mixich, Horst Jastrow
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Patent number: 4181983Abstract: A porous, hydrophilic, assimilable prosthesis is formed by the removal of solvent, without substantial dimensional change, from a solution of (a), an assimilable polymer composed primarily of polymerized units of an alpha or beta hydroxy carboxylic acid, preferably but not necessarily those having 1 to 4 carbon atoms, and (b), a small amount of a physiologically acceptable wetting agent that is sufficient to impart hydrophilicity to the prosthesis. The preferred assimilable polymer is a polylactic acid. The preferred process for making the prosthesis involves the lyophilization of a solution of polylactic acid having a molecular weight of at least 100,000, weight average, at a concentration of at least 31/2% by weight of the solution of the polylactic acid. A variety of physiologically acceptable wetting agents is useful, a preferred class being the alkali metal soaps of fatty acids or of alkyl aryl sulfonic acids.Type: GrantFiled: August 29, 1977Date of Patent: January 8, 1980Inventor: R. K. Kulkarni
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Patent number: 4174420Abstract: Flame resistance of upholstered furniture is significantly improved by interposing between the cover fabric and the padding or applying to the top side of the cover fabric a layer of neoprene foam capable of forming when exposed to a burning cigarette or under the conditions of a standard flame spread test, a thermally insulating char which does not smolder, and which maintains its structural integrity. The neoprene foam must be so formulated that it also is capable of evolving at combustion temperature sufficient amount of water to efficiently cool the affected area. Normally, the latex from which the foam is prepared is formulated with a char promoter and a hydrated inorganic compound. Upholstered furniture of this invention passes a burning cigarette test and performs extremely well in the flame spread test.Type: GrantFiled: April 29, 1975Date of Patent: November 13, 1979Assignee: E. I. Du Pont de Nemours and CompanyInventors: Colin Anolick, Vivian M. Robinson, Charles W. Stewart, Sr.
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Patent number: 4174432Abstract: Shaped flame retardant rigid thermoplastic foams are provided having high impact strength and superior smoke density and superior radiant panel test values. Blends of dichloroethylene bisphenol polycarbonate and a high performance thermoplastic polymer, such as isopropylidene bisphenol polycarbonate are injection foam molded under melt conditions to a variety of shaped structures.Type: GrantFiled: February 8, 1979Date of Patent: November 13, 1979Assignee: General Electric CompanyInventor: George E. Niznik
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Patent number: 4170697Abstract: Silicon halides will react chemically with polyols to produce polyol silicate resinous products which will react chemically with polyisocyanates to produce polyisocyanate silicate solid or cellular solid products.Type: GrantFiled: June 23, 1978Date of Patent: October 9, 1979Inventor: David H. Blount
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Patent number: 4158724Abstract: Tris-tetrazoles of formula I, ##STR1## wherein A is alkylene and R is hydrogen, alkyl or phenyl, are suitable blowing agents for thermoplastic resins, especially for polycarbonates and aromatic polyethers. The foaming process can be carried out at a temperature range of 230.degree. to 300.degree. C., the resulting foamed articles have a fine and homogeneous cellular structure.The tris-tetrazoles I can be synthesized from the corresponding tris-nitriles or tris-imidchlorides by reaction with an alkali azide.Type: GrantFiled: September 11, 1978Date of Patent: June 19, 1979Assignee: Ciba-Geigy CorporationInventors: Hugo Illy, Werner Fussenegger
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Patent number: 4158086Abstract: A flameproof thermoplastic molding material based on a styrene polymer and containing from 0.05 to 5 percent by weight of an organic bromine compound as the flameproofing agent, with or without a blowing agent, wherein the bromine compound contains a heterocyclic ring, comprising the group ##STR1## IN ITS MOLECULE, AND IS HEAT-STABLE UP TO AT LEAST 150.degree. C. The preferred bromine compound has the formula ##STR2## The molding materials may be used for the manufacture of self-extinguishing moldings, eg. foam moldings.Type: GrantFiled: July 28, 1978Date of Patent: June 12, 1979Assignee: BASF AktiengesellschaftInventors: Helmut Hagen, Herbert Naarmann, Klaus Penzien
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Patent number: 4146598Abstract: A crosslinked, soft, flexible, closed-cell foam of chlorinated high density polyethylene and a process for the preparation thereof, comprising admixing a high density chlorinated polyethylene with a thermally decomposable chemical foaming agent at a temperature below the decomposition temperature of said foaming agent, molding the chlorinated high density polyethylene into desired form at a temperature below the decomposition temperature of the foaming agent, subjecting the molded chlorinated high density polyethylene to irradiation crosslinking at a temperature below the decomposition temperature of said foaming agent and contacting, in a substantially oxygen-free environment, the crosslinked chlorinated high density polyethylene with a heat transfer medium maintained at a temperature of from about 150.degree. C. to about 350.degree. C. for a period sufficient to form the desired product.Type: GrantFiled: August 9, 1976Date of Patent: March 27, 1979Assignee: The Dow Chemical CompanyInventor: Brenton S. Coyne
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Patent number: 4129531Abstract: A method is provided for crosslinking polymers at temperatures above 170.degree. C using azo-esters having the formula ##STR1## wherein R.sup.3 is --OOC--R, alkyl, cycloalkyl or aralkyl.Type: GrantFiled: December 14, 1977Date of Patent: December 12, 1978Assignee: Pennwalt CorporationInventors: Kurt Rauer, Harald Hofmann, Heidelinde Schiller, Chester S. Sheppard
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Patent number: 4127718Abstract: Tris-tetrazoles of formula I, ##STR1## wherein A is alkylene and R is hydrogen, alkyl or phenyl, are suitable blowing agents for thermoplastic resins, especially for polycarbonates and aromatic polyethers. The foaming process can be carried out at a temperature range of 230 to 300.degree. C, the resulting foamed articles have a fine and homogenous cellular structure.The tris-tetrazoles I can be sythesized from the corresponding tris-nitriles or tris-imidchlorides by reaction with an alkali azide.Type: GrantFiled: October 5, 1977Date of Patent: November 28, 1978Assignee: Ciba-Geigy CorporationInventors: Hugo Illy, Werner Fussenegger
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Patent number: 4124557Abstract: Flame-retardant and low-smoke plasticized polyphosphazenes are disclosed. The plasticizers are substituted cyclotriphosphazenes and cyclotetraphosphazenes.Type: GrantFiled: March 23, 1978Date of Patent: November 7, 1978Assignee: Armstrong Cork CompanyInventors: Ronald L. Dieck, Edwin J. Quinn
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Patent number: 4111860Abstract: A process for the manufacture of a multicellular stretched sheet which comprises melt compounding a thermoplastic matrix polymer and an additive comprising a polymeric or non-polymeric organic compound or a metal salt of an organic acid, forming the blend into a shaped article and stretching the article at a temperature within the normal orientation temperature of the matrix polymer and below the glass-transition temperature of the polymeric additive or below the melting or softening point of the non-polymeric additive.Type: GrantFiled: October 29, 1974Date of Patent: September 5, 1978Assignee: Bakelite Xylonite LimitedInventor: James Jack
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Patent number: 4104195Abstract: Blowing agents comprising urea dicarboxylic acid anhydride do not give rise to discoloring decomposition residues nor form acid or alkaline by-products. These blowing agents may be used for expanding thermoplastic resins.Type: GrantFiled: September 25, 1975Date of Patent: August 1, 1978Assignee: Bayer AktiengesellschaftInventors: Kurt Ley, Hermann Hagemann, Helmut Hurnik
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Patent number: 4102808Abstract: A cellular elastomeric product is prepared by the curing of a froth prepared by whipping air into an aqueous dispersion of colloidal elastomer, said aqueous dispersion containing a latex frothing agent consisting of an aqueous solution containing about 70% water and about 25% magnesium di(lauryl sulfate), about 2.5% polyalkoxyglycerol having about eight alkoxy groups per hydroxyl and about 2.5% of a quaternary, dihydroimidazole derivative, there being a fatty acid carbon chain attached as the only carbon-carbon linkage for the carbon between the two nitrogens of the imidazole ring, the quaternary nitrogen partaking of the nature of a quaternary sodium glycinate having at such quaternary nitrogen both an alkhydroxy group and said dihydroimidazole ring.Type: GrantFiled: June 1, 1977Date of Patent: July 25, 1978Assignee: Arco Polymers, Inc.Inventor: Daniel Charles Straka
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Patent number: 4101464Abstract: Cellular polymeric solids are made by mixing an acidulous or acidic polymerizable medium that is polymerizable and/or cross-linkable by a free radical mechanism (e.g. an unsaturated polyester) with an effective amount of two or more acid sensitive mono- or poly-azo compounds containing the group: ##STR1## wherein Y is an acid sensitive group (e.g.Type: GrantFiled: September 16, 1976Date of Patent: July 18, 1978Assignee: Pennwalt CorporationInventors: Ernest Rudolph Kamens, Donald Milton Kressin, Harold Carl Lange, Ronald Edward MacLeay