Patents by Inventor Dietmar Nissen
Dietmar Nissen 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: 4996270Abstract: Vinyl ester resins possess unsaturated terminal groups and are based on polyphenols of the formulaC(ArOH).sub.m (R').sub.p --(CR.sub.2).sub.n --C(ArOH).sub.m (R").sub.p (I)or(ArOH)--CH.sub.2 --Ar--CH.sub.2 --[(ArOH)--CH.sub.2 --Ar--CH.sub.2 ].sub.n --(ArOH) (II)wherein R, R' and R" may be identical or different and are each H or CH.sub.3, Ar is phenylene which is unsubstituted or substituted by methyl or methoxy, n is 0, 1 or 2, m is 1 or 2 and p is 3-m.Type: GrantFiled: November 4, 1988Date of Patent: February 26, 1991Assignee: BASF AktiengesellschaftInventors: Bernhard Czauderna, Juergen Nieberle, Roland Peter, Dietmar Nissen
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Patent number: 4764397Abstract: Fiber-reinforced materials are produced by a process in which a heat-stable thermoplastic aromatic polyether A containing reactive groups, preferably nitrile groups and/or sulfur bridges and/or arylthio or alkylthio groups, if required together with a heat-stable thermoplastic polymer B which does not contain any reactive groups, is applied onto reinforcing fibers, the resulting semi-finished product is shaped, and the plastic matrix in the molding obtained is crosslinked so that there is virturally no increase in its glass transition temperature although the amount of soluble material is decreased to less than 60%, determined by extraction in boiling dichloromethane for one hour.Type: GrantFiled: December 30, 1985Date of Patent: August 16, 1988Assignee: BASF AktiengesellschaftInventors: Juergen Fischer, Hartmut Zeiner, Dietmar Nissen, Gerhard Heinz
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Patent number: 4649080Abstract: Fiber-reinforced materials are produced by a process in which a heat-stable thermoplastic aromatic polyether A which contains reactive groups, preferably nitrile groups and/or sulfur bridges and/or arylthio or alkylthio groups, if necessary together with a heat-stable thermoplastic polymer B which does not contain any reactive groups, is applied onto reinforcing fibers, the resulting semi-finished product is molded and, in the molding obtained, the plastic matrix is crosslinked so that the glass transition temperature increases and it becomes virtually insoluble.Type: GrantFiled: May 8, 1985Date of Patent: March 10, 1987Assignee: BASF AktiengesellschaftInventors: Juergen Fischer, Hartmut Zeiner, Dietmar Nissen, Gerhard Heinz, Peter Neumann
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Patent number: 4616070Abstract: Thermoplastic molding materials containing a mixture ofA. a heat-stable polymer, e.g. a polyether sulfone or polysulfone, which does not contain any reactive groups, andB. a heat-stable polymer which contains reactive groups, preferably nitrile or thioaryl groups and/or sulfur bridges,can be processed to moldings, which can be crosslinked, for example by being heated at above 200.degree. C., so that the plastic matrix becomes virtually insoluble.Type: GrantFiled: May 8, 1985Date of Patent: October 7, 1986Assignee: BASF AktiengesellschaftInventors: Hartmut Zeiner, Gerhard Heinz, Peter Neumann, Juergen Fischer, Dietmar Nissen
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Patent number: 4607069Abstract: A solvent-free curable composition has a long shelf life and consists ofA 100 parts by weight of an epoxy resin andB from 10 to 100 parts by weight of, as a curing agent for the epoxy resin, an aromatic diamine containing ##STR1## groups, with or without C from 0.01 to 5 parts by weight of an accelerator, the curing agent for the epoxy resin being finely dispersed in the latter and preferably having a particle size of less than 10 .mu.m. The preferred epoxy resin curing agent is 4,4'-diaminodiphenyl ketone. The curable composition is used in particular for the preparation of fiber-reinforced materials.Type: GrantFiled: July 3, 1985Date of Patent: August 19, 1986Assignee: BASF AktiengesellschaftInventors: Helmut Tesch, Manfred Heym, Walter Doerflinger, Herbert Stutz, Peter Neumann, Dietmar Nissen, Gerhard Schaefer
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Patent number: 4590242Abstract: Low-shrinkage nylon moldings are produced by activated alkaline lactam polymerization, preferably using the reactive injection molding technique, by a process wherein the polymerization is carried out in the presence of from 5 to 80% by weight of a polymer P which1. is completely soluble in the lactam,2. separates out in the course of polymerization at a conversion of from 1 to 50%,3. is composed of one or more blocks which are compatible with polylactam and one or more blocks which are incompatible therewith, and preferably4. possesses functional groups which are incorporated into the growing polylactam chain.Type: GrantFiled: July 14, 1983Date of Patent: May 20, 1986Assignee: BASF AktiengesellschaftInventors: Peter Horn, Hellmut Bunsch, Anton Hesse, Matthias Marx, Dietmar Nissen, Walter Heckmann
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Patent number: 4590104Abstract: Fiber-reinforced materials are produced by impregnating continuous filaments with a melt of a polyarylene sulfide ketone, preferably one having a reduced viscosity .eta..sub.red of from 0.1 to 0.5 [dl.g.sup.-1 ], shaping the resulting semi-finished product to give a finished article and heating the latter for not less than 15 minutes at above the crystallite melting point of the polyarylene sulfide ketone, the latter undergoing crosslinking and its glass transition temperature Tg increasing by not less than 5.degree. C.Type: GrantFiled: February 14, 1985Date of Patent: May 20, 1986Assignee: BASF AktiengesellschaftInventors: Hartmut Zeiner, Jurgen Fischer, Gerhard Heinz, Peter Neumann, Dietmar Nissen, Gerhard Schaefer
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Patent number: 4590219Abstract: The invention relates to a process for the preparation of elastomeric molded parts having urethane or urethane and urea linkages which comprises reacting(a) an organic polyisocyanate,(b) a polyhydroxyl compound selected from the group consisting of(i) polyester polyols with molecular weights of 1000 to 3000 and hydroxyl numbers of 170 to 35 produced by polycondensation of organic dicarboxylic acids and a polyol mixture of at least 3 polyols;(ii) polyether polyols having terminal ester groups, molecular weights of 1000 to 8000 and hydroxyl numbers of 170 to 15; and(iii) mixtures thereof;(c) a chain extenderwherein components (a) through (c) are processed according to reaction injection molding techniques in open or closed molds.The reaction is preferably carried out as a one-shot process and may also be carried out in the presence of blowing agents (d), auxiliaries (e), and additives (e).Type: GrantFiled: April 22, 1983Date of Patent: May 20, 1986Assignee: BASF AktiengesellschaftInventors: Dietmar Nissen, Matthias Marx, Hans U. Schmidt
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Patent number: 4469653Abstract: The invention relates to a process for the preparation of polyurethane or polyurethane-polyurea molded parts by reacting organic polyisocyanates, polyols and chain extenders in the presence of monocyclic amidines having the formula ##STR1## as catalyst or catalyst mixtures of monocyclic amidines having the formula (I) and (a) tertiary amines, (b) metal salts having the formula Me X.sub.n Y.sub.m (II), and/or (c) optionally-substituted aliphatic carboxylic acids. R.sup.1 and R.sup.2, Me, X, Y, n, and m are defined herein.Type: GrantFiled: June 28, 1982Date of Patent: September 4, 1984Assignee: BASF AktiengesellschaftInventors: Dietmar Nissen, Eckhard Hickmann
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Patent number: 4440705Abstract: A process for the preparation of optionally cellular and non-cellular polyurethane elastomers, preferably by reaction injection molding, organic polyisocyanates, polyether polyols based on polyoxyalkylene polyether polyols with terminal hydroxyethylene groups and an ethoxylation degree of 1 to 13, having a content of primary hydroxyl groups at the corresponding degree of ethoxylation as the value of curve A to 100 percent with curve A describing the dependency of the primary hydroxyl group content upon the degree of ethoxylation are reacted with chain extenders and/or cross-linking agents in the presence of catalysts as well as optionally blowing agents, auxiliaries and additives.Type: GrantFiled: July 1, 1982Date of Patent: April 3, 1984Assignee: BASF AktiengesellschaftInventors: Dietmar Nissen, Wolfgang Straehle, Matthias Marx
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Patent number: 4383050Abstract: Low temperature flexible polyurethane elastomers are prepared by reacting organic polyisocyanates with polyester polyols which have glass transition temperatures of -10.degree. to -80.degree. C. and incorporating therein alkoxylated esters of fatty acids and/or alkoxylated terpene alcohols.Type: GrantFiled: November 6, 1981Date of Patent: May 10, 1983Assignee: BASF AktiengesellschaftInventors: Dietmar Nissen, Hans U. Schmidt, Wolfgang Straehle, Uwe Schuett, Matthias Marx
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Patent number: 4305861Abstract: Polymer polyol dispersions are prepared by reacting polyepoxides with epoxide resin hardeners in the presence of polyester and polyoxyalkylene polyether polyols.Type: GrantFiled: October 20, 1980Date of Patent: December 15, 1981Assignee: BASF AktiengesellschaftInventors: Matthias Marx, Dietmar Nissen, Robert Gehm
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Patent number: 4304708Abstract: This invention relates to a process for the manufacture of stable polyol-filler dispersions. The polyol-filler dispersions are prepared by the crushing of fillers in situ in polyols employing high localized energies.Type: GrantFiled: January 27, 1981Date of Patent: December 8, 1981Assignee: BASF AktiengesellschaftInventors: Matthias Marx, Dietmar Nissen
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Patent number: 4293657Abstract: Stable melamine-polyoxyalkylene polyether polyol dispersions are prepared by the in situ reduction of melamine particles wherein 90 percent of the melamine particles have a particle size of less than 10 microns. Stabilizers for the melamine-polyol dispersion are selected from the group consisting of(a) silicic acids and silicates,(b) salts of perfluorinated alkyl carboxylic acids having 4 to 20 carbon atoms, salts of alkyl sulfonic acids and perfluorinated alkylsulfonic acids having 4 to 20 carbon atoms and polyperfluoroether polyols having molecular weights of 300 to 6000, and(c) salts of fatty alcohol sulfates having 6 to 30 carbon atoms.These dispersions are useful for the preparation of polyurethane foams.Type: GrantFiled: July 7, 1980Date of Patent: October 6, 1981Assignee: BASF AktiengesellschaftInventors: Dietmar Nissen, Matthias Marx, Wolfgang Jarre, Ernst Schoen, Walter Decker
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Patent number: 4251411Abstract: A process for the manufacture of partially dehydrated organic polymer polyol dispersions from the reaction of polyhydroxyl compounds and aqueous polymer dispersions wherein the problem of excessive viscosity is overcome by mixing the reactants with a recycled partially dehydrated polyol polymer dispersion, removing water from the reaction mixture, removing a portion of the partially dehydrated polyol polymer dispersion, and recycling the remainder.Type: GrantFiled: September 11, 1978Date of Patent: February 17, 1981Assignee: BASF AktiengesellschaftInventors: Gerhard Heinz, Hermann Dikow, Wolfgang Jarre, Dietmar Nissen, Klaus Matthias, Hanshelmut Kaeppel
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Patent number: 4243755Abstract: The invention relates to a process for the manufacture of reinforced polyurethane foams based on the reaction of organic polyisocyanates and polyols in the presence of filler dispersions. These dispersions are prepared by in situ crushing of the filler in the polyisocyanate or polyol to a particle size of less than 7 microns.Type: GrantFiled: November 13, 1979Date of Patent: January 6, 1981Assignee: BASF AktiengesellschaftInventors: Matthias Marx, Dietmar Nissen, Wolfgang Jarre
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Patent number: RE32628Abstract: A solvent-free curable composition has a long shelf life and consists ofA 100 parts by weight of an epoxy resin andB from 10 to 100 parts by weight of .[.,.]. .Iadd.4,4-bis-(para-aminobenzoyl)-piperazine .Iaddend.as a curing agent for the epoxy resin, .[.an aromatic diamine containing ##STR1## groups,.]. with or without C from 0.01 to 5 parts by weight of an accelerator, the curing agent for the epoxy resin being finely dispersed in the latter and preferably having a particle size of less than 10 .mu.m. .[.The preferred epoxy resin curing agent is 4,4'-diaminodiphenyl ketone..]. The curable composition is used in particular for the preparation of fiber-reinforced materials.Type: GrantFiled: November 24, 1986Date of Patent: March 22, 1988Assignee: BASF AktiengesellschaftInventors: Helmut Tesch, Manfred Heym, Walter Doerflinger, Herbert Stutz, Peter Neumann, Dietmar Nissen, Gerhard Schaefer