Patents by Inventor Peter Vehlewald
Peter Vehlewald has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6210523Abstract: Compositions made up of an aromatic polyisocyanate and a polyester having an average molecular weight of from about 600 to about 5000, obtainable by self-condensation of ricinoleic acid, optionally with co-utilization of a C2-C20 starter polyol and optional additives. These compositions are useful as binders for the production of composite materials.Type: GrantFiled: February 10, 1995Date of Patent: April 3, 2001Assignee: Bayer AktiengesellschaftInventors: Manfred Schmidt, Peter Vehlewald, Peter Kasperek, Manfred Kapps, Klaus König
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Patent number: 6007649Abstract: A process is described for producing pressed materials, particularly wood particle boards, by the hot compaction of raw materials containing lignocellulose which are mixed and/or impregnated with polyisocyanates as binders, with the use of latent, thermally activatable catalysts, wherein ammonium salts from the reaction of amines with malonic acid are used as catalysts.Type: GrantFiled: July 22, 1998Date of Patent: December 28, 1999Assignee: Bayer AktiengesellschaftInventors: Peter Haas, Peter Vehlewald, Peter Kasperek
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Patent number: 5869546Abstract: Mixtures leading to hard polyurethane foamed materials, which mixtures are preferably present in a pressure vessel, containa) prepolymers containing isocyanate groups, obtainable by the reaction of polyisocyanates containing isocyanurate groups and optionally urethane groups with compounds having at least two hydrogen atoms which are reactive to isocyanates and having a molecular weight of 62 to 10,000, wherein the content of monomeric polyisocyanate in the prepolymer is less than 2 weight %,b) auxiliary process materials and additives known in the art, andc) foaming agents having a boiling point less than 0.degree. C./760 mm Hg.Type: GrantFiled: September 20, 1996Date of Patent: February 9, 1999Assignee: Bayer AktiengesellschaftInventors: Peter Gruss, Manfred Kapps, Peter Vehlewald, Rainer Rettig
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Patent number: 4965292Abstract: The present invention relates to a process for strengthening geological formations in underground mining or underground construction work by the introduction of reaction mixtures which react to form polyurethane plastics into the formations which are required to be strengthened, wherein the reaction mixtures are based on(a) a polyisocyanate component,(b) a polyol component and(c) at least one auxiliary agent or additive, characterized in that component (c) contains a cyclic polydimethylsiloxane in the molecular weight range of 222 to 740 and in a quantity of about 0.01 to 5.0% by weight, based on the total weight of components (a) and (b).Type: GrantFiled: November 17, 1989Date of Patent: October 23, 1990Assignees: Bayer Aktiengesellschaft, Bergwerksverband GmbHInventors: Hanns P. Muller, Manfred Kapps, Peter Vehlewald, Frank Meyer, Wolfgang Cornely, Hans E. Mehesch
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Patent number: 4904125Abstract: The present invention is directed to a process for the strengthening of geological formations in underground workings and mines by the introduction of reaction mixtures which react to form polyurethanes into the formations which are to be strengthened, the reaction mixtures being based on(a) a polyisocyanate component,(b) a polyol component and(c) an ester,the ester having a hydroxyl number of about 10 to 630 and an acid number of at most 10 and obtained from (i) an acid component having a carboxyl functionality of at least 1.5 and containing a polymerized fatty acid having at least 12 carbon atoms or mixtures thereof with unpolymerized saturated or unsaturated fatty acids having at least 12 carbon atoms and (ii) a polyol component containing at least one polyhydric alcohol, the ester being present in a positive amount of up to 5% by weight, based on the weight of component (b).Type: GrantFiled: May 8, 1989Date of Patent: February 27, 1990Assignees: Bayer Aktiengesellschaft, Bergwerksverband GmbHInventors: Manfred Schmidt, Manfred Kapps, Max Mann, Peter Vehlewald, Manfred Dietrich, Frank Meyer, Wolfgang Cornely, Hans E. Mehesch
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Patent number: 4792262Abstract: The present invention is directed to a process for strengthening geological formations in underground mining or other operations introducing into the formation which is to be strengthened mixtures of a polyisocyanate component (a) and a polyol component (b) which react together to form polyurethanes, characterized in that the polyol component (b) is based on mixtures of (i) organic polyhydroxyl compounds having hydroxyl numbers of about 100 to 600 and (ii) dihydric alcohols having a molecular weight of 62 to about 150, component (ii) being present in an amount of about 0.01 to 20% by weight, based on the total quantity of component (b).Type: GrantFiled: August 20, 1986Date of Patent: December 20, 1988Assignee: Bayer AktiengesellschaftInventors: Manfred Kapps, Max Mann, Peter Vehlewald, Frank Meyer, Hans-Ernst Mehesch, Wolfgang Cornely, Birgit Riecks
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Patent number: 4668734Abstract: The present invention is directed to a stable dispersion of a polyurea and/or a polyhydrazodicarbonamide in a relatively high molecular weight hydroxyl-group containing material, which dispersion has a solids content of from 5 to 50 percent by weight and which is obtained by reacting(a) an organic di- and/or polyisocyanate with(b) an amine-functional material comprising an addition product of(1) acrylonitrile and(2) a member selected from the group consisting of(i) hydrazine,(ii) aliphatic di- or polyamines containing at least two primary amino groups,(iii) cycloaliphatic di- or polyamines containing at least two primary amino groups,(iv) araliphatic di- or polyamines containing at least two primary amino groups, and(v) mixtures thereof,the ratio of (1) to (2) being at least one mol of (1) per mol of (2) and at most one mol of (1) for each nitrogen atom contained in (2) per mol of (2),the reaction of component (a) and component (b) being conducted at a temperature of from 30.degree. to 170.degree. C.Type: GrantFiled: December 20, 1985Date of Patent: May 26, 1987Assignee: Bayer AktiengesellschaftInventors: Manfred Dietrich, Klaus K/o/ nig, Hans Hettel, Peter Seifert, Peter Vehlewald
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Patent number: 4282329Abstract: The instant invention is directed to a process for the production of non-disintegrating suspensions of inorganic fillers in polyhydroxyl compounds of the type used for the production of polyurethanes, comprising reacting a suspension of an inorganic filler in a polyhydroxyl compound with from 0.1 to 2%, by weight, of a polyisocyanate, based on the weight of the suspension, at a temperature of from 30.degree. to 200.degree. C. The invention is also directed to the use of the suspension as the polyol component in the production of cellular polyurethane plastics.Type: GrantFiled: July 21, 1980Date of Patent: August 4, 1981Assignee: Bayer AktiengesellschaftInventors: Wulf von Bonin, Peter Vehlewald, Hans-Walter Illger
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Patent number: 4272619Abstract: The present invention relates to a process for the production of modified polyether polyols by the radical polymerization of a mixture of acrylonitrile, styrene, a salt of an .alpha.,.beta.-unsaturated monocarboxylic or polycarboxylic acid containing a primary, secondary or tertiary monoamine or polyamine and optionally copolymerizable compounds with a polyether polyol.Type: GrantFiled: April 14, 1980Date of Patent: June 9, 1981Assignee: Bayer AktiengesellschaftInventors: Gerhard Balle, Hansjurgen Rabe, Peter Vehlewald
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Patent number: 4250077Abstract: The instant invention is directed to a suspension which is stable in storage comprising:(1) 0.5 to 80%, by weight, based on the total suspension, of an inorganic filler in(2) 20 to 99.5%, by weight, based on the total suspension, of polyhydroxyl compounds containing aliphatic or cycloaliphatic combined hydroxyl groups,wherein said polyhydroxyl compounds (2) contain from 0.05 to 10% by weight based on (1)+(2) of a graft polymer and stabilizer which was produced by the free radical polymerization of(a) from 1 to 35%, by weight, based on the graft polymer, of an olefinically unsaturated carboxylic acid and(b) from 0 to 60%, by weight, based on the graft polymer, of other olefinically unsaturated monomers, in the presence of(c) from 5 to 99%, by weight, based on the graft polymer, of polyhydroxyl compounds,wherein the carboxyl groups of the graft polymer are completely or partially neutralized by organic or inorganic bases.Type: GrantFiled: September 27, 1979Date of Patent: February 10, 1981Assignee: Bayer AktiengesellschaftInventors: Wulf von Bonin, Peter Vehlewald
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Patent number: 4240950Abstract: The instant invention is directed to a process for the production of non-disintegrating suspensions of inorganic fillers in polyhydroxyl compounds of the type used for the production of polyurethanes, comprising reacting a suspension of an inorganic filler in a polyhydroxyl compound with from 0.1 to 2%, by weight, of a polyisocyanate, based on the weight of the suspension, at a temperature of from 30.degree. to 200.degree. C. The invention is also directed to the use of the suspension as the polyol component in the production of cellular polyurethane plastics.Type: GrantFiled: July 30, 1979Date of Patent: December 23, 1980Assignee: Bayer AktiengesellschaftInventors: Wulf von Bonin, Peter Vehlewald, Hans-Walter Illger
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Patent number: 4224417Abstract: The invention relates to new polyamines, preferably containing polyether segments, a process for their preparation and their use as starting components for the production of polyurethane resins. The process involves producing ketimines, aldimines or enamines containing hydroxyl groups by reacting a hydroxyl amine with an aldehyde or ketone and removing the water by product. The ketimine, aldimine, or enamine is then reacted with an NCO prepolymer wherein the hydroxyl group of the material reacts with the isocyanate group without disturbing the blocked amine. This polyaddition product is then hydrolyzed to unblock the high molecular weight polyamine.Type: GrantFiled: January 2, 1979Date of Patent: September 23, 1980Assignee: Bayer AktiengesellschaftInventors: Manfred Hajek, Kuno Wagner, Friedrich Moller, Peter Vehlewald
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Patent number: 4198333Abstract: The instant invention is directed to a suspension which is stable in storage comprising:(1) 0.5 to 80%, by weight, based on the total suspension, of an inorganic filler in(2) 20 to 99.5%, by weight, based on the total suspension, of polyhydroxyl compounds containing aliphatic or cycloaliphatic combined hydroxyl groups,wherein said polyhydroxyl compounds (2) contain from 0.05 to 10% by weight based on (1)+(2) of a graft polymer and stabilizer which was produced by the free radical polymerization of(a) from 1 to 35%, by weight, based on the graft polymer, of an olefinically unsaturated carboxylic acid and(b) from 0 to 60%, by weight, based on the graft polymer, of other olefinically unsaturated monomers, in the presence of(c) from 5 to 99%, by weight, based on the graft polymer, of polyhydroxyl compounds,wherein the carboxyl groups of the graft polymer are completely or partially neutralized by organic or inorganic bases.Type: GrantFiled: August 24, 1978Date of Patent: April 15, 1980Assignee: Bayer AktiengesellschaftInventors: Wulf von Bonin, Peter Vehlewald
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Patent number: 4028434Abstract: The instant invention relates to graft polymers of vinyl phosphonic acid esters, optionally together with nitrogen-containing polymerizable vinyl compounds, on polyalkylene glycols and to a process for their production. The polymers so produced necessarily contain phosphorus and, optionally, nitrogen in the molecule. The polymers are rendered flameproof by the phosphorus and, in addition, self-extinguishing by the nitrogen.Type: GrantFiled: August 14, 1975Date of Patent: June 7, 1977Assignee: Bayer AktiengesellschaftInventors: Wolfgang Konter, Josef Witte, Peter Vehlewald, Hans-Dieter Block