Preparing A Cellular Product By Decomposition Of A Solid Polymer; Or Process Of Forming A Composition Containing A Solid Polymer Which Decomposes So As To Subsequently Form A Cellular Polymer, Or Composition Therefrom Patents (Class 521/77)
-
Patent number: 4363883Abstract: High density structural ("blocking") materials composed of a polyimide filled with glass microballoons. Structural components such as panels which have integral edgings and/or other parts made of the high density materials.Type: GrantFiled: September 12, 1980Date of Patent: December 14, 1982Assignee: International Harvester CompanyInventors: John Gagliani, Raymond Lee
-
Patent number: 4355120Abstract: Copolyimide foams derived from a diester of 3,3',4,4'-benzophenonetetracarboxylic acid, an aromatic diamine, and a heterocyclic diamine. A molar concentration of the heterocyclic diamine approaching but not exceeding 0.42 is employed. This results in a flexible foam with a homogeneous cellular structure and a reduced compression set loss.Type: GrantFiled: December 7, 1981Date of Patent: October 19, 1982Assignee: International Harvester Co.Inventors: John Gagliani, Raymond Lee, Usman A. K. Sorathia
-
Patent number: 4346182Abstract: Terpolyimides prepared from tetracarboxylic acid esters and combinations of heterocyclic, aromatic, and aliphatic diamines and artifacts composed of those terpolymers. Precursors, and methods of converting them to the corresponding terpolymers.Type: GrantFiled: April 14, 1981Date of Patent: August 24, 1982Assignee: International Harvester CompanyInventors: John Gagliani, Raymond Lee
-
Patent number: 4319000Abstract: Closed cell polyimide foams. Methods of making such foams from precursors derived from a benzophenonetetracarboxylic acid diester and a mixture of diamines in which the precursor is molded to shape and cured, hydrated, and heated until a porous, closed cell structure develops.Type: GrantFiled: March 30, 1981Date of Patent: March 9, 1982Assignee: International Harvester CompanyInventors: John Gagliani, John V. Long
-
Patent number: 4315077Abstract: Terpolyimides prepared from tetracarboxylic acid esters and combinations of heterocyclic, aromatic, and aliphatic diamines and artifacts composed of those terpolymers. Precursors, and methods of converting them to the corresponding terpolymers.Type: GrantFiled: May 27, 1981Date of Patent: February 9, 1982Assignee: International Harvester CompanyInventors: John Gagliani, Raymond Lee
-
Patent number: 4315080Abstract: Terpolyimides prepared from tetracarboxylic acid esters and combinations of heterocyclic, aromatic, and aliphatic diamines and artifacts composed of those terpolymers. Precursors, and methods of converting them to the corresponding terpolymers.Type: GrantFiled: May 27, 1981Date of Patent: February 9, 1982Assignee: International Harvester CompanyInventors: John Gagliani, Raymond Lee
-
Patent number: 4315076Abstract: Terpolyimides prepared from tetracarboxylic acid esters and combinations of heterocyclic, aromatic, and aliphatic diamines and artifacts composed of those terpolymers. Precursors, and methods of converting them to the corresponding terpolymers.Type: GrantFiled: April 14, 1981Date of Patent: February 9, 1982Assignee: International Harvester CompanyInventors: John Gagliani, Raymond Lee
-
Patent number: 4314035Abstract: Foamable copolymers and copolymer mixtures comprising 35% to 98% by weight ethylene, 1% to 30% by weight vinyl alcohol, 1% to 30% by weight acrylic acid esters of secondary or tertiary alcohols, and 0 to 5% by weight vinyl ester are disclosed. All percentages are based upon the total weight of the copolymer or mixture. Methods of foaming such materials, foamed materials made therefrom, and methods of preparation thereof are also disclosed.Type: GrantFiled: August 20, 1980Date of Patent: February 2, 1982Assignee: Ruhrchemie AktiengesellschaftInventors: John-Victor Hobes, Wolfgang Payer
-
Patent number: 4296208Abstract: Methods of preparing polyimides and polyimide precursors from liquid resins containing tetracarboxylic acid esters and primary diamines which involve spray drying the resin.Type: GrantFiled: September 12, 1980Date of Patent: October 20, 1981Assignee: International Harvester CompanyInventors: John Gagliani, Usman A. K. Sorathia
-
Patent number: 4273886Abstract: Polyimide foams derived from mixtures of aromatic diamines and partial esters of a benzophenonetetracarboxylic acid. The precursors are converted into polyimide foams by the application of heat; and the foams are then compressed, yielding dense, rigid, and structurally strong, intumescent materials.Type: GrantFiled: February 15, 1980Date of Patent: June 16, 1981Assignee: International Harvester CompanyInventor: John Gagliani
-
Patent number: 4246358Abstract: Fire-resistant organic materials including foams, are made by heating at temperatures sufficient to cause polymerization and elimination of nitrogen and sulfur precursor aromatic polymers having sulfonamide linkages and aromatic compounds capable of forming said polymers, e.g. sulfamyl-type aminoaromatic compounds such as sulfanilamide, sulfaguanadine and the like. Preferred compounds are those providing para linkages in the sulfonamide polymer chain, those which are substantially free of oxidizing substituents, for example nitro groups, and those which are not fused-ring aromatic. Preferred foams are the high expansion foams, i.e. those having expansion ratios of at least about 3:1, more preferably at least about 8:1. The precursors of these fire-resistant organic materials can be incorporated into polymers such as polyvinylidene chloride, polyisocyanates, aminoplasts, and the like either physically by mixing or by chemical reaction to give improved fire-resistance.Type: GrantFiled: December 17, 1979Date of Patent: January 20, 1981Assignee: Monsanto Research CorporationInventor: James A. Ellard
-
Patent number: 4246357Abstract: A foamable copolymer comprising 40 to 98 percent by weight units of ethylene, 1 to 30 weight percent units of vinyl alcohol, 1 to 30 weight percent units of acrylic acid ester of a secondary or tertiary alcohol, and up to 2 percent by weight of vinyl acetate units is described together with a process for the manufacture thereof. The same is useful in the formation of a foamed mass which is relatively highly cross-linked. The copolymer can be foamed to form a foam by heating the same at 250.degree. to 350.degree. C. for 5 to 60 minutes in the absence of oxygen.Type: GrantFiled: July 9, 1979Date of Patent: January 20, 1981Assignee: Ruhrchemie AktiengesellschaftInventors: John V. Hobes, Wolfgang Payer
-
Patent number: 4241193Abstract: Polyimide foams derived from mixtures of aromatic diamines and partial esters of a benzophenonetetracarboxylic acid. The precursors are converted into polyimide foams by the application of heat; and the foams are then compressed, yielding dense, rigid, and structurally strong, intumescent materials.Type: GrantFiled: August 21, 1978Date of Patent: December 23, 1980Assignee: International Harvester CompanyInventor: John Gagliani
-
Patent number: 4241114Abstract: Polyimide foams derived from mixtures of aromatic diamines and partial esters of a benzophenonetetracarboxylic acid. The precursors are converted into polyimide foams by the application of heat; and the foams are then compressed, yielding dense, rigid, and structurally strong, intumescent materials.Type: GrantFiled: February 15, 1980Date of Patent: December 23, 1980Assignee: International Harvester CompanyInventor: John Gagliani
-
Patent number: 4238572Abstract: The invention relates to a foamable polymeric polyblend of a matrix copolymer of alkenyl aromatic/alkenyl nitrile monomers having dispersed therein (1) a grafted diene rubber being grafted with said monomers and (2) an alkyl half ester of a styrene/maleic anhydride copolymer. The composition is foamed by the thermal decomposition of said half ester. The foamed polyblend has great utility as a structural foam with said composition providing fast molding cycles and fine cell structure. A method for foaming said polyblend is disclosed.Type: GrantFiled: November 16, 1979Date of Patent: December 9, 1980Assignee: Monsanto CompanyInventor: Richard L. Hoffman
-
Patent number: 4230820Abstract: Organopolysiloxane foams are prepared by heating a mixture containing (A) a diorganopolysiloxane, (B) silicon dioxide having a surface area of at least 50 m.sup.2 /g, (C) a peroxide compound, (D) at least one organosilicon compound containing at least 2 weight percent of Si-bonded hydroxyl groups and (E) at least one organopolysiloxane having Si-bonded hydrogen, to a temperature between 280.degree. and 320.degree. C. at a pressure which does not exceed the pressure of the surrounding atmosphere.Type: GrantFiled: March 2, 1979Date of Patent: October 28, 1980Assignee: Wacker-Chemie GmbHInventors: Adolph Maschberger, Peter August
-
Patent number: 4226949Abstract: Aromatic polyamide foams having a density of 0.025 to 0.7 g./cm..sup.3 are prepared by heating N-alkyl aromatic polyamides having at least one .beta. hydrogen atom on the alkyl groups, a plasticizer and an aromatic sulfonic acid catalyst at 250.degree. to 340.degree. C. for a length of time sufficient to remove substantially all of the N-alkyl groups.Type: GrantFiled: August 1, 1979Date of Patent: October 7, 1980Assignee: E. I. Du Pont de Nemours and CompanyInventor: Wesley Memeger, Jr.
-
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
-
Patent number: 4197370Abstract: Novel foamable compositions are disclosed which may comprise a polyphenylene oxide resin with or without an alkenyl aromatic resin; and a foaming agent which is a thermally unstable copolymer.Type: GrantFiled: December 27, 1976Date of Patent: April 8, 1980Assignee: General Electric CompanyInventors: Daniel W. Fox, John C. Goossens
-
Patent number: 4179298Abstract: Flame retardant intumescent polyamides comprising repeating structural units of the formulas ##STR1## wherein X is independently chloro or bromo, and n and n' are each independently a positive integer are disclosed.Type: GrantFiled: January 18, 1978Date of Patent: December 18, 1979Assignee: The Dow Chemical CompanyInventors: Linnea E. Nelson, Charles E. Reineke
-
Patent number: 4128513Abstract: A black sorbent thermoset foam which has been prepared by the pyrolysis of a composition comprising at least one aromatic nitrogen-containing compound having the general formula:X -- Ar -- Yin which Ar represents an aromatic nucleus on which X and Y are substituents directly attached to the nucleus, X represents a substituent having a negative Hammett sigma constant and attached to the aromatic nucleus by a nitrogen, oxygen or sulphur atom, and Y represents a substituent having a positive Hammett sigma constant and attached to the aromatic nucleus by a nitrogen atom, the substituents X and/or Y optionally forming part of a ring fused onto the aromatic nucleus, in an effective sorbtive substance for polar molecules and materials.Type: GrantFiled: May 13, 1974Date of Patent: December 5, 1978Assignee: Minnesota Mining and Manufacturing CompanyInventors: Louis A. Errede, Robert A. Sinclair