Patents by Inventor Otto Ganster
Otto Ganster 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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Publication number: 20090227724Abstract: Preparations of surface-deactivated solid isocyanates which are dispersed in finely particulate manner, with aqueous isocyanate-reactive polymer dispersions that include a) dispersed polymers having isocyanate-reactive groups, b) dispersed surface-deactivated oligomeric solid polyisocyanates, and c) at least one catalyst, where the catalyst or the totality of catalysts accelerates the reaction of the monomeric polyisocyanates which form by the thermal cleavage of the oligomeric polyisocyanates more strongly than the thermal cleavage itself. The preparations are prepared by mixing aqueous dispersions of at least one isocyanate-reactive polymer with at least one dispersed surface-deactivated oligomeric solid polyisocyanate and at least one catalyst. The preparations can be used in binders, films and powders for bonded joints, or coatings and to make a latently cross-linking adhesive layer. Substrates can be coated with layers obtainable with the above-described preparations.Type: ApplicationFiled: March 2, 2009Publication date: September 10, 2009Inventors: Otto Ganster, Jorg Buchner, Heinz-Werner Lucas, Wolfgang Henning
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Patent number: 7498380Abstract: Preparations of surface-deactivated solid isocyanates which are dispersed in finely particulate manner, with aqueous isocyanate-reactive polymer dispersions that include a) dispersed polymers having isocyanate-reactive groups, b) dispersed surface-deactivated oligomeric solid polyisocyanates, and c) at least one catalyst, where the catalyst or the totality of catalysts accelerates the reaction of the monomeric polyisocyanates which form by the thermal cleavage of the oligomeric polyisocyanates more strongly than the thermal cleavage itself. The preparations are prepared by mixing aqueous dispersions of at least one isocyanate-reactive polymer with at least one dispersed surface-deactivated oligomreric solid polyisocyanate and at least one catalyst. The preparations can be used in binders, films and powders for bonded joints, or coatings and to make a latently cross-linking adhesive layer. Substrates can be coated with layers obtainable with the above-described preparations.Type: GrantFiled: May 25, 2005Date of Patent: March 3, 2009Assignee: Bayer MaterialScience AGInventors: Otto Ganster, Jörg Büchner, Heinz-Werner Lucas, Wolfgang Henning
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Publication number: 20050267255Abstract: Preparations of surface-deactivated solid isocyanates which are dispersed in finely particulate manner, with aqueous isocyanate-reactive polymer dispersions that include a) dispersed polymers having isocyanate-reactive groups, b) dispersed surface-deactivated oligomeric solid polyisocyanates, and c) at least one catalyst, where the catalyst or the totality of catalysts accelerates the reaction of the monomeric polyisocyanates which form by the thermal cleavage of the oligomeric polyisocyanates more strongly than the thermal cleavage itself. The preparations are prepared by mixing aqueous dispersions of at least one isocyanate-reactive polymer with at least one dispersed surface-deactivated oligomreric solid polyisocyanate and at least one catalyst. The preparations can be used in binders, films and powders for bonded joints, or coatings and to make a latently cross-linking adhesive layer. Substrates can be coated with layers obtainable with the above-described preparations.Type: ApplicationFiled: May 25, 2005Publication date: December 1, 2005Inventors: Otto Ganster, Jorg Buchner, Heinz-Werner Lucas, Wolfgang Henning
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Publication number: 20030119976Abstract: The present invention relates to surface-deactivated solid isocyanates obtained by surface reaction of finely dispersed solid isocyanates with mono- or polyamines that have anionic groups or groups capable of anion formation and have primary and/or secondary amino groups.Type: ApplicationFiled: August 12, 2002Publication date: June 26, 2003Inventors: Otto Ganster, Gerhard Klein, Jorg Buchner, Heinz-Werner Lucas, Anja Matussek
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Patent number: 6506280Abstract: The present invention relates to an aqueous dispersion containing an isocyanate-reactive polymer and a polyisocyanate, wherein the polyisocyanate has a melting or softening point of >30° C. and is in the form of a finely divided powder having a mean particle diameter of less than 100 &mgr;m. The present invention also relates to an adhesive composition containing this dispersion and to a process for bonding substrates with this composition.Type: GrantFiled: March 9, 2001Date of Patent: January 14, 2003Assignee: Bayer AktiengesellschaftInventors: Otto Ganster, Ralf Werner, Jörg Büchner, Wolfgang Henning
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Publication number: 20010034404Abstract: The present invention relates to an aqueous dispersion containing an isocyanate-reactive polymer and a polyisocyanate, wherein the polyisocyanate has a melting or softening point of >30° C. and is in the form of a finely divided powder having a mean particle diameter of less than 100 &mgr;m.Type: ApplicationFiled: March 9, 2001Publication date: October 25, 2001Inventors: Otto Ganster, Ralf Werner, Jorg Buchner, Wolfgang Henning
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Patent number: 6191216Abstract: The invention relates to improved hydrophilic, polyurethane gel substances and foams, the use of polyurethane gel substances for pressure-distributing, in particular self-adhesive polyurethane-(foam) gels, and the use of said polyurethane gel substances for moulded structures and adhesive coatings.Type: GrantFiled: November 3, 1998Date of Patent: February 20, 2001Assignee: Bayer A.G.Inventors: Otto Ganster, Jörg Büchner, Jochen Werner Kenndoff, Günther Sachau
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Patent number: 6087439Abstract: The invention relates to aqueous crosslinking polymer dispersions which are characterized in that they consist ofA) 98 to 80 wt. % of a 40 to 60% aqueous alkaline polymer dispersion based on 2-chlorobuta-1,3-diene, with a pH of .gtoreq.9.5 and a chloride content, arising from the elimination of chlorine atoms from the polymer, of .gtoreq.300 ppm, andB) 2 to 20 wt. % of polyisocyanates obtained by the cyclotrimerization of aliphatic and/or cycloaliphatic diisocyanates, containing NCO groups bonded predominantly or exclusively as secondary groups,and to their use for the preparation of water-based adhesives.Type: GrantFiled: January 29, 1998Date of Patent: July 11, 2000Assignee: Bayer AGInventors: Otto Ganster, Jorg Buchner, Heinz-Werner Lucas
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Patent number: 6034169Abstract: The present invention is directed to a novel adhesive which is a mixture ofA) at least one aqueous dispersion of a polymer which has a softening point below 70.degree. C., said dispersion containing 5 to 70% by weight solids and having a film-forming temperature below 70.degree. C., andB) at least one aqueous dispersion of a polymer based on olefinically unsaturated monomers having a softening point is above 70.degree. C., said dispersion containing 5 to 70% by weight solids,wherein the weight ratio of dispersion A) to dispersion B) is from 97:3 to 60:40, based on the solids content of said dispersions.Type: GrantFiled: September 2, 1992Date of Patent: March 7, 2000Assignee: Bayer AktiengesellschaftInventors: Reiner Witkowski, Otto Ganster, Heinrich Konigshofen, Ralph Ostarek
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Patent number: 5998538Abstract: The present invention relates to solvent-free two-component polyurethane adhesive systems with high initial strengths and low levels of migration derived from a select reactants comprising a hydroxyl polyester and an isocyanate containing prepolymer.Type: GrantFiled: September 16, 1993Date of Patent: December 7, 1999Assignee: Bayer AktiengesellschaftInventors: Walter Meckel, Eduard Hansel, Klaus Konig, Otto Ganster, Jorg Buchner
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Patent number: 5407517Abstract: The invention relates to a process for bonding surfaces with isocyanate-containing prepolymers having an isocyanate group content of less than 1.8% by weight, based on the prepolymer, and an average molecular weight MW.sub.n of at least 4,500 in which (a) the prepolymers are prepared by the reaction of (i) polyester diols prepared from dodecanedioic acid and even-numbered alkane diols containing at least 6 carbon atoms and (ii) diisocyanates; (b) the prepolymer is applied as a hotmelt adhesive at a temperature of 80 to 160.degree. C. by spin-spraying onto at least one surface to be bonded; and (c) the treated surface is brought into intimate contact with a second surface to be bonded.Type: GrantFiled: March 15, 1991Date of Patent: April 18, 1995Assignee: Bayer AktiengesellschaftInventors: Eduard Hansel, Walter Meckel, Klaus Konig, Otto Ganster, Horst Stepanski
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Patent number: 5384385Abstract: Disclosed herein are two-component polyurethane reactive compositions containing polyisocyanates and components carrying active hydrogen which are stabilized against separation with a compound in solution containing a NH group or NH.sub.2 group and a C--N multiple bond or N--N multiple bond.Type: GrantFiled: November 13, 1992Date of Patent: January 24, 1995Assignee: Bayer AktiengesellschaftInventors: Rainer Trinks, Otto Ganster, Heinrich Konigshofen
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Patent number: 5349040Abstract: Disclosed herein is a two-component polyurethane adhesive containing an isocyanate component a), an active hydrogen containing component which is stable against demixing b), optionally a catalyst for the reaction of a) with b) and optionally an auxiliary agent and an additive, characterized in that an active hydrogen containing component which is stable against demixing b) contains at least one hydroxyl group-containing low molecular weight chain lengthening agent having at least one C-C double bond or C-C triple bond and having a molecular weight of at least 86 and a functionality of at least 2 and containing no carboxyl groups.Type: GrantFiled: October 11, 1991Date of Patent: September 20, 1994Assignee: Bayer AktiengesellschaftInventors: Rainer Trinks, Heinrich Konigshofen, Otto Ganster, Horst Stepanski, Jose Colinas-Martinez
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Patent number: 5254199Abstract: Disclosed herein is an adhesive and a process for bonding with the adhesive containing an isocyanate prepolymer a), an isocyanate reactive component b) and a catalyst for the reaction of a) and b), characterized in that the catalyst comprises a compound corresponding to the following formula ##STR1## wherein R.sup.1 and R.sup.2 may be identical of different and denote an alkyl group having 1 to 4 carbon atoms,R.sup.3 denotes a CHO group or H or alkyl group having 1 to 4 carbon atoms, optionally substituted with a CHO group,n stands for an integer from 2 to 4,o stands for 1 or 2,p stands for 0 or 1 ando+p=2.Type: GrantFiled: March 11, 1992Date of Patent: October 19, 1993Assignee: Bayer AktiengesellschaftInventors: Horst Stepanski, Jose Colinas-Martinez, Rainer Trinks, Bernhard Jansen, Hanns-Peter Muller, Otto Ganster
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Patent number: 5215618Abstract: Disclosed herein is a process for bonding substrates comprising applying a hot-melt adhesive to the surface of at least one of the substrates and contacting the surface of said substrate with the surface of the other substrate, said adhesive containing an ester group-containing polyisocyanate which is a solid below 30.degree. C. and liquid above 100.degree. C., corresponding to formula (I)A(OCO-B-NCO).sub.n (I)in whichn stands for a whole number or a fraction (statistical average) of from 2 to 6,A stands for an n-valent organic group such as is obtained by removal of hydroxyl groups from an n-valent polyhydroxyl compound in the molecular weight (Mn) range of from 800 to 6000 containing ester and/or carbonate groups andB stands for an aliphatic, cycloaliphatic or aromatic hydrocarbon group having up to 18 carbon atoms.Type: GrantFiled: August 8, 1991Date of Patent: June 1, 1993Assignee: Bayer AktiengesellschaftInventors: Lutz Schmalstieg, Eduard Haensel, Klaus Nachtkamp, Heinrich Konigshofen, Otto Ganster
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Patent number: 5204409Abstract: The invention relates to crosslinking isocyanates for polymeric adhesives containing a mixture of triisocyanatotriphenyl methane and trimerization products of 2,4-tolylene diisocyanate containing at least 50% triisocyanatomonoisocyanurate and less than 1% free tolylene diisocyanate.Type: GrantFiled: February 7, 1992Date of Patent: April 20, 1993Assignee: Bayer AktiengesellschaftInventors: Gunter Arend, Otto Ganster, Rudolf Hombach, Horst Muller-Albrecht, Knut Panskus
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Patent number: 5173559Abstract: The present invention relates to reactive systems comprising(a) a storable mixture of (i) a polyisocyanate component comprising at least one organic polyisocyanate, and (ii) an epoxide component stabilized by heating in the presence of an alkylating agent, wherein said heating is optionally carried out in the further presence of part of the polyisocyanate component (i),(b) an isocyanate-reactive component containing at least two isocyanate-reactive groups in a quantity such that 0.1 to 0.9 isocyanate-reactive groups are present for every isocyanate group in component (a), wherein at least 10% by weight of component (b) comprises compounds having a molecular weight greater than about 2000,(c) optionally, tertiary amines in a quantity such that the total storable mixture contains at least 0.005 mole of tertiary amine nitrogen atoms for each 100 g of the total amount of the storable mixture, and, optionally,(d) other auxiliaries and additives.Type: GrantFiled: October 20, 1989Date of Patent: December 22, 1992Assignee: Bayer AktiengesellschaftInventors: Hanns-Peter Muller, Otto Ganster, Bruno Luckas
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Patent number: 5162457Abstract: This invention relates to crystalline, isocyanate group-containign hot melt adhesives based onfrom 70-95% by weight of a prepolymer A based on polyester diols having a molecular weight of from 1500 to 10,000 and melting points of from 50.degree. to 90.degree. C. and diisocyanates in a ratio of isocyanate groups of the diisocyanate to the hydroxyl groups of the polyester diol of from 3:1 to 1.2:1 andfrom 5-30% by weight of a component B having a molecular weight of from 1000 to 10,000 based on polyesters having melting points of from 60.degree. to 150.degree. C., in which component B contains at most 0.5 Zerewitinow active groups per molecule.Type: GrantFiled: October 31, 1991Date of Patent: November 10, 1992Assignee: Bayer AktiengesellschaftInventors: Eduard Hansel, Walter Meckel, Klaus Konig, Otto Ganster, Horst Stepanski
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Patent number: 5143995Abstract: Disclosed herein is a transparent adhesive containing isocyanate groups based on at least one polyol and at least one polyisocyanate, characterized in that the adhesive contains urea groups.Type: GrantFiled: June 27, 1991Date of Patent: September 1, 1992Assignee: Bayer AktiengesellschaftInventors: Walter Meckel, Eduard Hansel, Otto Ganster, Gunter Arend, Jorg Buchner
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Patent number: 5039293Abstract: The present invention relates to a process and a device for the production of a composite part by the sequential introduction of several fillings (consisting of at least one free-flowing reaction mixture, of which at least one forms a foamed material) into the hollow space of the mold of a closed form tool. A mixing device is attached to form tool. The mixer comprises injector nozzles for the reaction components pointing into a mixing chamber and an ejector piston for the cleaning of the mixer chamber. The ejector piston may be slid forward right up to the outlet orifice of the mixing chamber.Type: GrantFiled: June 6, 1988Date of Patent: August 13, 1991Assignee: Bayer AktiengesellschaftInventors: Ulrich Knipp, Otto Ganster, Bernhard Rentz