Patents by Inventor Hans Joachim Kreuder
Hans Joachim Kreuder 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: 5852101Abstract: The present invention relates to a powder coating composition for the production of non-yellowing flexible coatings which is solid below 30.degree. C. and liquid above 120.degree. C. and contains a mixture ofA) a polyisocyanate component whichi) has a content of blocked isocyanate groups (expressed as NCO, molecular weight=42) of 3.0 to 14.0% by weight,ii) has a functionality, based on the blocked isocyanate groups, of 1.9 to 2.3 andiii) and contains at least one .epsilon.Type: GrantFiled: October 27, 1997Date of Patent: December 22, 1998Assignee: Bayer AktiengesellschaftInventors: Reinhard Halpaap, Christian Wamprecht, Hans-Joachim Kreuder, Wolfgang Schultz, Manfred Bock, Rainer Rettig
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Patent number: 5728789Abstract: The present invention relates to powder coating compositions wherein the binder contains copolymers which are solid below 30.degree. C., prepared from olefinically unsaturated compounds and have a weight-average molecular weight (M.sub.w) of 1500 to 75,000, a content of free hydroxyl groups of 0.2 to 6.0% by weight and a content of intramolecular carboxylic acid anhydride groups (calculated as C.sub.4 H.sub.2 O.sub.3) of 1 to 30% by weight.Type: GrantFiled: May 13, 1997Date of Patent: March 17, 1998Assignee: Bayer AktiengesellschaftInventors: Christian Wamprecht, Hans-Joachim Kreuder, Armin Zenner, Henning Klussmann
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Patent number: 5292807Abstract: The present invention relates to compositions which are storage stable at room temperature and containA) at least one compound having at least two cyclic isourea groups per molecule andB) at least one compound having at least two carboxyl groups per molecule,in an amount sufficient to provide a molar ratio of isourea groups to carboxyl groups of 0.5:1 to 1.5:1.Type: GrantFiled: January 27, 1993Date of Patent: March 8, 1994Assignee: Bayer AktiengesellschaftInventors: Walter Schafer, Hanns P. Muller, Hans-Joachim Kreuder, Manfred Bock, Knud Reuter
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Patent number: 5280072Abstract: The present invention relates to coating compositions in pulverulent form which are solid below 30.degree. C. and liquid above 150.degree. C. and containA) 10 to 99 parts by weight of a copolymer component containing at least one copolymer which is prepared from olefinically unsaturated compounds, has a weight average molecular weight of 1500 to 75,000 and contains in chemically bound form(i) 1 to 30% by weight of cyclic carboxylic acid anhydride groups (calculated as C.sub.4 H.sub.2 O.sub.3) and(ii) 0.3 to 10% by weight of epoxide groups (calculated as C.sub.2 H.sub.3 O), andB) 1 to 90 parts by weight of a polyol component containing at least one organic polyol having at least two hydroxyl groups per molecule,provided that for every anhydride group of component A) there are 0.1 to 10 hydroxyl groups of component B).Type: GrantFiled: May 5, 1992Date of Patent: January 18, 1994Assignee: Bayer AktiengesellschaftInventors: Christian Wamprecht, Hans-Joachim Kreuder, Josef Pedain
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Patent number: 5219939Abstract: The present invention relates to powder coating compositions which are solid below 3O.degree. C. and contain a mixture ofA) a copolymer component which is solid below 3O.degree. C. and contains at least one copolymer containing both cyclic carboxylic anhydride groups and hydroxyl groups,B) a polyepoxide component which contains at least one polyepoxide containing at least two epoxide groups per molecule.Type: GrantFiled: August 21, 1991Date of Patent: June 15, 1993Assignee: Bayer AktiengesellschaftInventors: Christian Wamprecht, Hans-Joachim Kreuder
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Patent number: 5208291Abstract: The present invention relates to a process for the production of powder coating compositions having a glass transition temperature of 20.degree. to 80.degree. C. bya) homogeneously dissolving in an inert solvent or solvent mixture having a boiling point or range between 50.degree. and 150.degree. C.A) a polyol component having a hydroxyl value of 30 to 155 and a glass transition temperature of 30.degree. to 120.degree. C. and containing at least one hydroxy-functional copolymer of olefinically unsaturated monomers,B) a polyisocyanate component containing blocked isocyanate groups, having a glass transition temperature of -45.degree. to +45.degree. C. and containing at least one ketoxime-blocked polyisocyanate andC) a catalyst component containing at least one catalyst for the reaction between blocked isocyanate groups and hydroxyl groups components,wherein components A) and B) are present in an amount which is sufficient to provide an equivalent ratio of blocked isocyanate groups to hydroxyl groups of 0.Type: GrantFiled: September 8, 1992Date of Patent: May 4, 1993Assignee: Bayer AktiengesellschaftInventors: Christian Wamprecht, Reinhard Halpaap, Hans-Joachim Kreuder, Manfred Bock, Jurgen Meixner, Rainer Rettig, Wolfgang Schultz
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Patent number: 5068305Abstract: The present invention relates to powder coating compositions which can be cured in the presence of heat and/or high energy radiation and contain polyurethanes which melt at temperatures of 50.degree. to 180.degree. C., have 3 to 10% by weight of olefinic double bonds in the form of (meth)acryloyl groups (calculated as .dbd.C.dbd.C.dbd., molecular weight=24) and are based on the reaction product ofA) 40 to 80 parts by weight of one or more organic polyisocyanates withB) 15 to 50 parts of weight of one or more monohydric alcohols containing (meth)acryloyl groups andC) 2 to 20 parts by weight one or more compounds which are free from (meth)acryloyl groups and contain isocyanate reactive groups.Type: GrantFiled: July 20, 1990Date of Patent: November 26, 1991Assignee: Bayer AktiengesellschaftInventors: Jurgen Meixner, Josef Pedain, Peter Hohlein, Hans-Joachim Kreuder
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Patent number: 4943623Abstract: Polyesters useful as a binder or a component of a binder for powder lacquers and which contain hydroxyls, carboxyls or both and which have an acid value of up to 50, a hydroxyl value of up to 200 and a sum of hydroxyl value and acid value of from 20 to 200 is produced by reacting:(a) an acid component selected from the group consisting of (a1) at least one poly-functional organic carboxylic acid, (a2) at least one ester-forming derivative of a poly-functional organic carboxylic acid, (a3) at least one organic hydroxycarboxylic acid, (a4) at least one lactone of an organic hydroxycarboxylic acid, and mixtures thereof, with the proviso that at least 50 mol-% of component (a) consists of aromatic species of components (a1), (a2), (a3), (a4), or mixtures thereof,with(b) a polyol component which is at least one polyhydric alcohol having a molecular weight in the range from 62 to 250,while maintaining an equivalent ratio of carboxyl groups to hydroxyl groups of form 0.65:1 to 1.Type: GrantFiled: November 21, 1988Date of Patent: July 24, 1990Assignee: Bayer AktiengesellschaftInventors: Wolfgang Ebert, Rolf-Volker Meyer, Hans-Joachim Kreuder
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Patent number: 4900800Abstract: The present invention relates to a powder lacquer containing a mixture of(A) a polyisocyanate component in power form which is solid below about 40.degree. C. and liquid above about 150.degree. C. and(B) a organic polyhydroxyl component in powder form which is solid below about 40.degree. C. and liquid above about 150.degree. C.,components (A) and (B) being present in quantities corresponding to an equivalent ratio of isocyanate groups to hydroxyl groups of about 0.6:1 to 1.2:1, characterized in that component (A) is based on a polyisocyanate or polyisocyanate mixture which(a) does not contain any blocking agents for isocyanate groups,(b) has a content of free isocyanate groups (expressed as NCO) attached to tertiary, aliphatic or cycloaliphatic carbon atoms of about 8 to 24% by weight and an average NCO functionality of at least 2.1,(c) has a urethane group content (expressed as --NH--CO--O--) of about 3 to 30% by weight and(d) has an isocyanurate group content (expressed as C.sub.3 N.sub.3 O.sub.Type: GrantFiled: July 15, 1987Date of Patent: February 13, 1990Assignee: Bayer AktiengesellschaftInventors: Reinhard Halpaap, Josef Pedain, Hans-Joachim Kreuder, Gerhard Klein, Walter Schafer, Dieter Arlt
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Patent number: 4851531Abstract: The present invention is directed to isocyanato isocyanurates prepared from diisocyanates which contain a sterically unhindered isocyanate group bound to a primary aliphatic carbon atom and a sterically hindered isocyanate group which is bound to a tertiary carbon atom forming part of a cycloaliphatic ring system, said diisocyanate having an NCO content of about 20 to 50% by weight. The present invention is further directed to a process for preparing these isocyanato isocyanurates by catalytic trimerization and the use of the isocyanato isocyanurates in a process for the production of polyisocyanate polyaddition products, preferably two-component polyurethane stoving lacquers.Type: GrantFiled: July 16, 1987Date of Patent: July 25, 1989Assignee: Bayer AktiengesellschaftInventors: Reinhard Halpaap, Gerhard Klein, Roland Richter, Hanns P. Muller, Josef Pedain, Hans-Joachim Kreuder
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Patent number: 4748242Abstract: The present invention is directed to a process for the production of polyisocyanates containing isocyanurate groups by trimerizing a mixture of aliphatic-cycloaliphatic diisocyanates having a sterically unhindered isocyanate group bound to a primary aliphatic carbon atom and a sterically hindered isocyanate group bound to a tertiary carbon atom which forms a part of a cycloaliphatic ring system and 1,6-diisocyanatohexane. The present invention is also directed to the polyisocyanates containing isocyanurate groups produced according to this process and to their use, optionally in blocked form, as an isocyanate component in the production of polyisocyanate polyaddition products, preferably polyurethane lacquers.Type: GrantFiled: November 12, 1986Date of Patent: May 31, 1988Assignee: Bayer AktiengesellschaftInventors: Reinhard Halpaap, Josef Pedain, Hans-Joachim Kreuder, Gerhard Klein, Dieter Arlt
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Patent number: 4698426Abstract: Cyclic amidines which are modified by the incorporation of additional polar groups, may be used as catalysts for hardening heat-curable resin compositions comprising polyepoxides and optionally carboxyl group-containing polymers. Such amidine catalysts yield a high reactivity, an excellent storage stability and result in elastic coatings which show a high gloss and a good resistance to solvents.Type: GrantFiled: February 7, 1985Date of Patent: October 6, 1987Assignee: Bayer AktiengesellschaftInventors: Rolf-Volker Meyer, Hans-Joachim Kreuder, Erwin Hohl
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Patent number: 4510288Abstract: Cyclic amidines which are modified by the incorporation of additional polar groups, may be used as catalysts for hardening heat-curable resin compositions comprising polyepoxides and optionally carboxyl group-containing polymers. Such amidine catalysts yield a high reactivity, an excellent storage stability and result in elastic coatings which show a high gloss and a good resistance to solvents.Type: GrantFiled: March 16, 1983Date of Patent: April 9, 1985Assignee: Bayer AktiengesellschaftInventors: Rolf-Volker Meyer, Hans-Joachim Kreuder, Erwin Hohl
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Patent number: 4424313Abstract: The reaction of polymers containing carboxyl groups with organic nitrogen bases which have certain structural features leads to highly reactive products which are eminently suitable as binder components for powder lacquers which may be hardened with polyepoxides.Type: GrantFiled: January 12, 1983Date of Patent: January 3, 1984Assignee: Bayer AktiengesellschaftInventors: Rolf-Volker Meyer, Hans-Joachim Kreuder, Peter Ho/ hlein
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Patent number: 4112012Abstract: Object of the invention are pulverulent coating compositions which are obtained if the coating compositions contain as crosslinking agents polyglycidyl esters of polycarboxylic acids and as binders polyesters from polyalcohols and predominantly aromatic polycarboxylic acids which contain free carboxyl groups.Type: GrantFiled: May 27, 1977Date of Patent: September 5, 1978Assignee: Bayer AktiengesellschaftInventors: Eckhard de Cleur, Rolf Dhein, Hans Rudolph, Hans Joachim Kreuder
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Patent number: 4022724Abstract: Alkyd resin lacquers which contain cellulose nitric acid esters can be prevented from "lifting" and yellowing by the addition of bis-[hydroxyphenyl]-alkanes which are substituted in the nucleus.Type: GrantFiled: July 18, 1975Date of Patent: May 10, 1977Assignee: Bayer AktiengesellschaftInventors: Hans Joachim Kreuder, Bernd Peltzer, Johannes Beckers, Wolfgang Kremer, Theo Kempermann
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Patent number: 3966836Abstract: The invention relates to a pulverulent coating material prepared from a polyester which contains free carboxyl groups of succinic acid and cross-linking agents which react with carboxyl groups at elevated temperatures.Type: GrantFiled: May 28, 1974Date of Patent: June 29, 1976Assignee: Bayer AktiengesellschaftInventors: Eckhard DE Cleur, Rolf Dhein, Hans Rudolph, Hans Joachim Kreuder
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Patent number: 3932358Abstract: The invention relates to a pulverulent coating material prepared from a polyester which contains free carboxyl groups of succinic acid and cross-linking agents which react with carboxyl groups at elevated temperatures.Type: GrantFiled: November 4, 1974Date of Patent: January 13, 1976Assignee: Bayer AktiengesellschaftInventors: Eckhard de Cleur, Rolf Dhein, Hans Rudolph, Hans Joachim Kreuder