Carbodiimide Containing (i.e., -n=c=n- Containing) Patents (Class 560/334)
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Patent number: 10494505Abstract: The object of the invention is a method for stabilizing polyester-resin-based bioplastics by means of specific carbodiimides.Type: GrantFiled: July 13, 2015Date of Patent: December 3, 2019Assignee: LANXESS Deutschland GmbHInventors: Wilhelm Laufer, Martina Schoenhaber
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Patent number: 9181386Abstract: A polishing pad having a polishing layer comprising a thermoset polyurethane foam, wherein the thermoset polyurethane foam contains, as raw material components, an isocyanate component, and active-hydrogen-containing compounds, and the active-hydrogen-containing compounds comprise one or more polyol compounds (each) having two or more functional groups, and a monool compound having one functional group.Type: GrantFiled: March 17, 2011Date of Patent: November 10, 2015Assignee: Toyo Tire & Rubber Co., Ltd.Inventors: Masato Doura, Nobuyoshi Ishizaka
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Patent number: 8969471Abstract: A process for the preparation of stable aqueous polycarbodiimide dispersions to be used as cross-linking agents, in which initially an isocyanate functional polycarbodiimide is prepared from a polyisocyanate and a mono- or polyisocyanate which contains a hydrophobic group. Thereafter the polycarbodiimide chain is capped and/or extended by reaction of the isocyanate functions or a part thereof with a hydrophilic amine- or hydroxy functional compound and of the remaining isocyanate functions with an amine- or hydroxy functional compound which contains hydrophobic groups, after which the obtained product is dispersed in water and the pH is adjusted to 9-14. The hydrophobic groups are hydrocarbons with 4-25 carbon atoms, fluorinated hydrocarbons, silicone functional hydrocarbons or polysilicones. Further, the invention relates to a coating mixture in which the polycarbodiimide dispersion is used as cross-linking agent and to the cured material obtained with the coating mixture.Type: GrantFiled: January 10, 2007Date of Patent: March 3, 2015Assignee: Stahl International B.V.Inventors: Laurentius Cornelis Josephus Hesselmans, Marthe Hesselmans, Andries Johannes Derksen
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Publication number: 20130274506Abstract: The present invention relates to novel biobased carbodiimides, a process for production thereof and use thereof. The biobased carbodiimides according to the invention comprise the reaction product of at least one carbodiimide and a carbon acid compound isolated or produced from renewable raw materials and having a functionality >1 and/or a hydroxy carboxylic ester having 2-24 carbon atoms.Type: ApplicationFiled: May 19, 2011Publication date: October 17, 2013Applicant: RHEIN CHEMIE RHEINAU GMBHInventors: Wilhelm Laufer, Armin Eckert, Franco Orsini, Robert Eiben
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Patent number: 8440779Abstract: The invention relates to a carbodiimide compound or mixture of carbodiimide compounds derived from a carbodiimidization reaction of at least one oligomer having at least one isocyanate group and comprising at least two repeating units deriving from one or more ethylenically unsaturated monomers.Type: GrantFiled: November 4, 2004Date of Patent: May 14, 2013Assignee: 3M Innovative Properties CompanyInventors: Frans A. Audenaert, Chetan P. Jariwala
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Patent number: 8389010Abstract: The present invention provides a stretchable collagen material, particularly collagen derived from fishes, having excellent stretching property and mechanical strength, which can be widely used as a cell carrier and medical material, and to a method for manufacturing the same. By thermally treating a gel comprising collagen fiber cross-linked by using cross-linking agent, the collagen enhanced in both stretching property and mechanical strength can be produced. The stretchable collagen material is extremely useful as a cell carrier material and medical material.Type: GrantFiled: August 26, 2008Date of Patent: March 5, 2013Assignee: Ihara & Company Ltd.Inventors: Shuji Yunoki, Nobuhiro Nagai
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Patent number: 8299201Abstract: A one-component polyurethane composition includes at least one polyurethane prepolymer having terminal isocyanate groups which is prepared from at least one polyisocyanate and at least one polyol, and to at least one catalyst system which is obtainable from at least one bismuth compound and at least one aromatic nitrogen compound. The polyurethane composition may be used as an adhesive, sealant, coating or lining. Finally, catalysts for polyurethane compositions are disclosed which represent coordination compounds between bismuth and at least one aromatic nitrogen compound.Type: GrantFiled: October 1, 2003Date of Patent: October 30, 2012Assignee: Sika Technology AGInventors: Urs Burckhardt, Andreas Diener
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Publication number: 20120100290Abstract: The present invention relates to novel bonding agents based on carbodiimides, to aqueous resorcinol-formaldehyde-latex dispersion comprising bonding agent, to adhesion-improved fibres, to processes for production thereof, and to use thereof for improving adhesion in tyres.Type: ApplicationFiled: August 23, 2011Publication date: April 26, 2012Applicant: RHEIN CHEMIE RHEINAU GMBHInventors: Wilhelm Laufer, Anke Blaul, Armin Eckert, Andrea Fruth, Ana Maria Cano Sierra
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Publication number: 20120065424Abstract: A low-catalyst-content isocyanate mixture containing at least one of a carbodiimide group and a uretonimine groups, obtained by: reacting at least one monomeric diisocyanate (A) in the presence of phosphorus-containing catalyst (B), to obtain a reaction mixture comprising carbodiimide, where the reaction does not take place to complete conversion of the diisocyanate (A) and 1-80% by weight of the diisocyanate (A) employed remains in the reaction mixture as excess diisocyanate; and subsequently simultaneously removing, by distillation, a fraction of the excess of diisocyanate and the catalyst (B), to obtain the isocyanate mixture and a distillate, where the isocyanate mixture has a monomeric diisocyanate (A) content of 0.5%-20% by weight, based on the monomeric diisocyanate (A) employed, and a catalyst (B) content of 0% to 20% by weight, based on the catalyst (B) employed. In addition, a process for preparing a low-catalyst-content isocyanate mixture.Type: ApplicationFiled: April 21, 2010Publication date: March 15, 2012Applicant: EVONIK DEGUSSA GmbHInventors: Emmanouil Spyrou, Evelyn Albrecht, Annegret Lilienthal, Iris Brueckner, Andrea Voecker
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Patent number: 8134014Abstract: The invention relates to the use of specific pyridines as catalysts for the dimerization of isocyanates (uretdione formation) and a process for preparing polyisocyanates having a high content of uretdione groups.Type: GrantFiled: December 2, 2008Date of Patent: March 13, 2012Assignee: Bayer MaterialScience AGInventors: Frank Richter, Andreas Hecking, Reinhard Halpaap
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Patent number: 8105629Abstract: The present invention relates to a process of producing a collagen gel comprising collagen fibers cross-linked with each other by a cross-linking agent on the way of fibrosis of collagen, and a collagen gel comprising the cross-linked collagen fibers obtained by the process. The collagen gel comprising cross-linked collagen fibers of the present invention has high strength and thermal stability and can be widely used as cell carriers and medical materials.Type: GrantFiled: February 24, 2005Date of Patent: January 31, 2012Assignee: Ihara & Company Ltd.Inventors: Shunji Yunoki, Nobuhiro Nagai
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Patent number: 8063144Abstract: The present invention relates to polyacrylate-modified polyisocyanates which are i) prepared from aromatic, araliphatic, cycloaliphatic and/or aliphatic polyisocyanates having an NCO content of 5% to 25% by weight, an NCO functionality ?2 and a viscosity measured as solvent free resin of 150 to 200,000 mPa·s at 23° C., and ii) contain at least one structural unit of the formula (I) R is hydrogen or a methyl group, R1 is an optionally heteroatom-containing hydrocarbon radical and R2 is a hydrocarbon radical having at least one isocyanate group and optionally urethane, allophanate, biuret, uretdione, isocyanurate and/or iminooxadiazinedione groups and n is a number ?1; and to processes for preparing these polyisocyanates and to binder compositions containing these polyisocyanates, which may be hydrophilically modified and a compound having NCO-reactive groups.Type: GrantFiled: November 25, 2009Date of Patent: November 22, 2011Assignee: Bayer MaterialScience AGInventors: Christian Wamprecht, Martin Melchiors, Jörg Schmitz
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Publication number: 20110275802Abstract: The present invention relates to a process for modifying diisocyanates for preparing polyisocyanates, where the diisocyanate is reacted using a catalyst, wherein the diisocyanate used is obtained by quenching a gaseous reaction mixture in the phosgenation of diamines in the gas phase, wherein the gaseous reaction mixture comprises at least a diisocyanate, phosgene and hydrogen chloride, wherein a quenching liquid is sprayed into the gas mixture which flows continuously from a reaction zone into a downstream quenching zone, and wherein the quenching liquid is sprayed in by at least two spray nozzles which are arranged at the inlet of the quenching zone at equal intervals along the circumference of the quenching zone.Type: ApplicationFiled: November 26, 2009Publication date: November 10, 2011Applicant: BAYER MATERIALSCIENCE AGInventors: Frank Richter, Reinhard Halpaap
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Patent number: 8022200Abstract: The invention relates to a process for the preparation of liquid, storage-stable isocyanate mixtures which are characterized by a low color number and which contain carbodiimide (CD) and/or uretonimine (UI) groups. This invention also relates to the isocyanate mixtures obtained by this process, to their use for the preparation of blends with further isocyanates, and to the preparation of prepolymers containing isocyanate groups and of polyurethane plastics, preferably polyurethane foams from these isocyanate mixtures.Type: GrantFiled: July 1, 2005Date of Patent: September 20, 2011Assignee: Bayer MaterialScience AGInventors: Stefan Wershofen, Manfred Schmidt, Hans-Georg Pirkl, Nobuhiro Kamiyama, Shinichi Murakami, Tetsuo Harada
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Patent number: 7901695Abstract: A controlled continuous release composition, articles comprising the continuous release composition, methods of using the composition, and methods of preparing the composition are disclosed. The composition comprises an elastomeric matrix which is a reaction product of a carboxyl-terminated polymer with a polycarbodiimide and at least one active agent which is released from the matrix into the environment substantially continuously over an extended period of time.Type: GrantFiled: March 12, 2004Date of Patent: March 8, 2011Assignee: Cray Valley USA, LLCInventors: Herbert Chao, Nan Tian
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Patent number: 7825276Abstract: The invention relates to a process for the preparation of liquid, storage-stable isocyanate mixtures of low color number containing carbodiimide (CD) and/or uretonimine (UI) groups, the isocyanate mixtures obtainable by this process and the use thereof for the preparation of blends with further isocyanates and for the preparation of prepolymers containing isocyanate groups and of polyurethane plastics, preferably polyurethane foams.Type: GrantFiled: January 3, 2007Date of Patent: November 2, 2010Assignee: Bayer MaterialScience AGInventors: Stefan Wershofen, Marcus Steinwegs
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Patent number: 7790907Abstract: A method produces a uretonimine-modified isocyanate composition having increased low-temperature tolerance. The method comprises providing a first polyisocyanate composition having two or more isocyanate groups and comprising 4,4?-diphenylmethane diisocyanate (MDI) and reacting the first polyisocyanate composition at a temperature of from about 90° C. to about 115° C. and in the presence of a catalyst such that the isocyanate groups form carbodiimides for forming uretonimine and uretonimine oligomers. The reaction of the first polyisocyanate composition is quenched with a quenching agent to produce an intermediate composition having an intermediate isocyanate value of from about 21.0 to about 26.0. The intermediate composition is blended with a second isocyanate composition to form a stable uretonimine-modified isocyanate composition.Type: GrantFiled: July 21, 2006Date of Patent: September 7, 2010Assignee: BASF CorporationInventors: Thomas Savino, Nikolay Lebedinski
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Patent number: 7745659Abstract: The invention relates to a process for the production of liquid, storage-stable isocyanate mixtures with a low color index having carbodiimide-(CD) and/or uretone imine (UI) groups, the isocyanate mixtures that can be obtained by this process and their use for the production of blends with other isocyanates or for the production of isocyanate group-containing pre-polymers and also of polyurethane plastics, preferably polyurethane foamed plastics.Type: GrantFiled: December 8, 2005Date of Patent: June 29, 2010Assignee: Bayer MaterialScience AGInventors: Stefan Wershofen, Manfred Schmidt, Hans-Georg Pirkl, Torsten Hagen
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Patent number: 7714148Abstract: The invention relates to a process for the preparation of liquid, storage-stable isocyanate mixtures of low color number and which contain carbodiimide (CD) and/or uretonimine (UI) groups, the isocyanate mixtures obtainable by this process, and to a process for the preparation of blends of these isocyanates with additional isocyanate components and to a process for the preparation of prepolymers containing isocyanate groups and of polyurethane plastics, preferably polyurethane foams.Type: GrantFiled: January 3, 2007Date of Patent: May 11, 2010Assignee: Bayer MaterialScience AGInventors: Stefan Wershofen, Marcus Steinwegs
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Patent number: 7662989Abstract: The invention relates to a process for the preparation of liquid, storage-stable isocyanate mixtures of low color number containing carbodiimide (CD) and/or uretonimine (UI) groups, the isocyanate mixtures obtainable by this process, the preparation of blends with further isocyanates and the process of the preparation of prepolymers containing isocyanate groups and/or polyurethane plastics, preferably polyurethane foams, from these isocyanate mixtures.Type: GrantFiled: January 3, 2007Date of Patent: February 16, 2010Assignee: Bayer Materialscience AGInventors: Stefan Wershofen, Marcus Steinwegs
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Publication number: 20070167633Abstract: The invention relates to a process for the preparation of liquid, storage-stable isocyanate mixtures of low color number and which contain carbodiimide (CD) and/or uretonimine (UI) groups, the isocyanate mixtures obtainable by this process, and to a process for the preparation of blends of these isocyanates with additional isocyanate components and to a process for the preparation of prepolymers containing isocyanate groups and of polyurethane plastics, preferably polyurethane foams.Type: ApplicationFiled: January 10, 2007Publication date: July 19, 2007Inventors: Stefan Wershofen, Marcus Steinwegs, Manfred Schmidt
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Patent number: 7176330Abstract: A novel fluorescent group-containing carbodiimide compound having at least one group selected from a carboxyl group, a sulfo group, a phosphono group and a phospho group which have substitution of an alkali metal, an alkaline earth metal or a basic group containing a nitrogen or phosphorus atom, which is prepared by using a novel fluorescent group-containing carbodiimide compound precursor having a halogen atom or a sulfonic acid group; and a method for detecting a nucleic acid by hybridization utilizing a nucleic acid labeled with a labeling substance, which utilizes the fluorescent group-containing carbodiimide compound as the labeling substance.Type: GrantFiled: September 2, 2003Date of Patent: February 13, 2007Assignee: Nisshingo Industries, Inc.Inventors: Naoki Kimura, Namiko Shiohata, Yoko Yoshikawa
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Polyurethane elastomers having improved physical properties and a process for the production thereof
Patent number: 7045650Abstract: A polyol composition having a number average molecular weight of from about 1,000 to about 3,000 Daltons is made up of (1) at least 60% by weight of a low monol polyoxypropylene polyol having a number average molecular weight of from about 2,000 to 12,000 Da and a degree of unsaturation less than or equal to 0.02 meq/g and (2) no more than 40% by weight of a polyol having a number average molecular weight of from about 400 to about 1,000 Da and a polydispersity index greater than 1.1. This polyol composition is reacted with a diisocyanate, a polyisocyanate, an isocyanate-terminated prepolymer or an isocyanate-terminated quasi-prepolymer to produce polyurethane elastomers having good physical and mechanical properties. Any of the known processes for producing polyurethane elastomers, including one-shot processes, may be used to produce elastomers in accordance with the present invention.Type: GrantFiled: September 2, 2004Date of Patent: May 16, 2006Assignee: Bayer Materialscience LLCInventors: Bruce D. Lawrey, Kurt C. Frisch, Nigel Barksby -
Patent number: 6576788Abstract: In a process for preparing mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced content of chlorinated by-products and a reduced iodine color number by two-stage reaction of the corresponding mixtures of diphenylmethanediamines and polyphenylpolymethylenepolyamines with phosgene in the presence of at least one inert organic solvent at elevated temperature, separation of the excess phosgene and solvent after the phosgenation is complete and thermal treatment of the reaction product, the mass ratios of phosgene to hydrogen chloride in the residence time apparatus of the second stage of the phosgenation are at the same time 10-30:1 in the liquid phase and 1-10:1 in the gas phase.Type: GrantFiled: October 13, 2000Date of Patent: June 10, 2003Assignee: BASF AktiengesellschaftInventors: Ulrich Penzel, Volker Scharr, Dieter Starosta, Hilmar Boesel, Eckhard Ströfer, Joachim Pfeffinger, Frank Poplow, Jürgen Dosch, Hans Volkmar Schwarz, Fritz Näumann, Peter van den Abeel, Jan Jacobs, Filip Nevejans, Willy van Pee
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Patent number: 6489503Abstract: The present invention provides a liquid methylene bis(phenylisocyanate) composition including a high concentration of methylene bis(phenylisocyanate) which has an improved storage stability. The invention further provides a method of making the liquid methylene bis(phenylisocyanate) compositions of the present invention.Type: GrantFiled: November 9, 1999Date of Patent: December 3, 2002Assignee: BASF CorporationInventors: Thirumurti Narayan, Anthony Lunato, Jon S. Speier, David D. Peters, Cynthia Loop, Filip Nevejans
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Patent number: 6262139Abstract: The invention provides a liquid polyisocyanate prepolymer composition which is a result of combining about 50.0 to 90.0 percent by weight of an isocyanate blend (a.) having 55.0 to 75.0 weight percent 4,4′-MDI, 17.0 to 27.0 weight percent 2,4′-MDI, 1.0 to 10.0 weight percent 3-ring MDI oligomer, and 1.0 to 15.0 weight percent n-ring MDI oligomer (n greater than 3); about 5.0 to 30.0 weight percent of a polyhydroxy containing polyol (b.) having a molecular weight of from 700 to about 6,000; and about 15.0 to 75.0 weight percent of a toluene diisocyanate (c.). The resulting isocyanate prepolymer composition has a free NCO content of from about 30.0 to 45.0 weight percent and particularly desirable flow characteristics. The invention further provides a method of making an isocyanate prepolymer composition, a process of making a polyurethane foam utilizing the isocyanate prepolymer composition of the invention, and polyurethane foams produced by the disclosed process.Type: GrantFiled: March 16, 1998Date of Patent: July 17, 2001Assignee: BASF CorporationInventors: Thirumurti Narayan, David J. Lovell, Alejandro Shimazaki
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Patent number: 6120699Abstract: The present invention provides a liquid methylene bis(phenylisocyanate) composition including a high concentration of methylene bis(phenylisocyanate) which has an improved storage stability. The invention further provides a method of making the liquid methylene bis(phenylisocyanate) compositions of the present invention.Type: GrantFiled: September 21, 1998Date of Patent: September 19, 2000Assignee: BASF CorporationInventors: Thirumurti Narayan, Anthony Lunato, Jon S. Speier, David D. Peters, Cynthia Loop, Filip Nevejans
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Patent number: 5610408Abstract: A process for preparing a liquid MDI, which comprises adding, to MDI, a phospholine catalyst and a phosphorous acid ester of a specified formula and conducting a carbodiimidization reaction.Type: GrantFiled: August 28, 1995Date of Patent: March 11, 1997Assignee: Sumitoma Bayer Urethane Co., Ltd.Inventors: Toshiaki Imokawa, Yoshiharu Kato
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Patent number: 5539010Abstract: Disclosed as a particular isocyanate prepolymer composition particularly suitable for use in polyurethane compositions having particular applicability for producing microcellular molded polyurethane articles particularly suitable for use as sealing devices. In particular, the isocyanate prepolymer composition is the result of reacting an isocyanate blend (a) having(i) 0 to 10 pbw 2,4'-diphenylmethane diisocyanate;(ii) 40 to 90 pbw 4,4'-diphenylmethane diisocyanate;(iii) 1 to 10 pbw 3-ring oligomers of polymethylenepolyphenyl polyisocyanate;(iv) 1 to 20 pbw of n-ring oligomers ofpolymethylene polyphenyl polyisocyanate (n being greater than 3); and(v) 1 to 10 pbw of a mixture of uretonimine with from 5 to 50 parts by weight of a propoxylated propylene glycol (b) having a number average molecular weight of between 2000 and 6000, and a hydroxyl number of between 10 to 75. The resulting isocyanate prepolymer (I) has a free NCO of from 20 to 30 and a viscosity of from 50 to 500 cPs.Type: GrantFiled: October 30, 1995Date of Patent: July 23, 1996Assignee: BASF CorporationInventors: Thirumurti Narayan, Steven Hicks
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Patent number: 5510053Abstract: Disclosed as a particular isocyanate prepolymer composition particularly suitable for use in polyurethane compositions having particular applicability for producing microcellular molded polyurethane articles particularly suitable for use as sealing devices. In particular, the isocyanate prepolymer composition is the result of reacting an isocyanate blend (a) having(i) 0 to 10 pbw 2,4'-diphenylmethane diisocyanate;(ii) 40 to 90 pbw 4,4'-diphenylmethane diisocyanate;(iii) 1 to 10 pbw 3-ring oligomers of polymethylene polyphenyl polyisocyanate;(iv) 1 to 20 pbw of n-ring oligomers of polymethylene polyphenyl polyisocyanate (n being greater than 3); and(v) 1 to 10 pbw of a mixture of uretonimine with from 5 to 50 parts by weight of a propoxylated propylene glycol (b) having a number average molecular weight of between 2000 and 6000, and a hydroxyl number of between 10 to 75. The resulting isocyanate prepolymer (I) has a free NCO of from 20 to 30 and a viscosity of from 50 to 500 cPs.Type: GrantFiled: December 29, 1994Date of Patent: April 23, 1996Assignee: BASF CorporationInventors: Thirumurti Narayan, Steven Hicks
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Patent number: 5508372Abstract: The present invention relates to a process for the production of storage stable prepolymers containing free isocyanate groups by reactinga) an organic polyisocyanate component having (cyclo)aliphatically bound isocyanate groups and a maximum functionality of 4.5 withb) one or more hydroxy-functional polyacrylate resins having a content of alcoholic hydroxy groups of 0.05 to 7% by weight at an equivalent ratio of isocyanate groups of component a) to hydroxyl groups of component b) of 3:1 to 40:1, wherein components a) and b) are selected to provide a value B of at most 4 when calculated in accordance with the formula: ##EQU1## wherein F.sub.1 and F.sub.2 represent the NCO and OH functionalities of components a) and b), F.sub.1 representing the component with the lower functionality when the components differ in functionality andval.sub.A /val.sub.I represents the OH/NCO equivalent ratio of components a) and b).Type: GrantFiled: April 19, 1993Date of Patent: April 16, 1996Assignee: Bayer AktiengesellschaftInventors: Martin Brahm, Lutz Schmalstieg, Werner Kubitza, Wieland Hovestadt, Josef Pedain
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Patent number: 5236960Abstract: The invention relates to water blown integral skin polyurethane foams made with a particular isocyanate quasi-prepolymer and resin side ingredients to yield a foam having good overall mechanical properties. The isocyanate quasi-prepolymer component of the present invention comprises from 0.5 weight percent to 30.0 weight percent or less uretonimine-carbodiimide-modified diphenylmethane diisocyanate, from 50 weight percent to 80 weight percent 4,4'-diphenylmethane diisocyanate and reacted with from 15 weight percent to 40 weight percent of a polyether polyol containing predominately secondary hydroxyl groups and having an average molecular weight from about 2,000 to 10,000, an average functionality from 1.5 to about 3.2, and a hydroxyl number from about 20 to 60, and optionally with a low molecular weight diol in an amount of from 1.0 weight percent to 10 weight percent, the weight percentages based on the weight of the quasi-prepolymer reactants.Type: GrantFiled: January 19, 1993Date of Patent: August 17, 1993Assignee: BASF CorporationInventors: Richard P. Harrison, Michael Scarpati, Thirumurti Narayan, Blair J. Zagata
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Patent number: 5233010Abstract: A process for preparing an isocyanate having at least two --N.dbd.C.dbd.O groups is provided which comprises preparing a substituted aromatic amine having at least two --NH.sub.2 groups, recovering the substituted aromatic amine having at least two --NH.sub.2 groups, and preparing an isocyanate from the substituted aromatic amine having at least two --NH.sub.2 groups by (1) contacting the substituted aromatic amine with CO.sub.2 under conditions sufficient to produce the corresponding ammonium carbamate salt, and reacting the ammonium carbamate salt with an electrophilic or oxophilic dehydrating agent under conditions sufficient to produce the corresponding isocyanate, or (2) contacting the substituted aromatic amine with CO.sub.Type: GrantFiled: October 15, 1992Date of Patent: August 3, 1993Assignee: Monsanto CompanyInventors: William D. McGhee, Michael K. Stern, Thomas E. Waldman
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Patent number: 5202358Abstract: The present invention relates to liquid storable organic isocyanates containing carbodiimide and/or uretone imine groups prepared by(a) partially carbodiimidizing isocyanate groups of an organic isocyanate with catalysts of the phospholine type, and(b) terminating the carbodiimidization reaction by the addition of a silylated acid corresponding to the formulaX--[Si(CH.sub.3).sub.3 ].sub.nin whichX represents the neutral acid residue obtained by removal of the acidic hydrogen atoms from an n-basic acid having a pK.sub.a value of at most 3, other than a hydrohalic acid, andn is an integer of 1 to 3.The invention further relates to the use of the liquid polyisocyanate mixtures according to the invention for the preparation of polyurethane plastics, preferably polyurethane foams, having improved burning behavior.Type: GrantFiled: May 18, 1992Date of Patent: April 13, 1993Assignee: Bayer AktiengesellschaftInventors: Hans-Joachim Scholl, Rainer Welte
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Patent number: 5126479Abstract: The present invention relates to a process for the production of organic compounds containing (i) carbodiimide and/or uretone imine groups and (ii) blocked isocyanate groups, wherein about 10 to 90% of the isocyanate groups of an organic polyisocyanate are blocked by reaction with a monofunctional blocking agent for isocyanate groups, and subsequently about 65 to 100% of the free isocyanate groups still remaining are converted into carbodiimide groups with elimination of the carbodiimide. The present invention also relates to the organic compounds obtainable by this process and to their use for the production of plastics by reaction with compounds containing isocyanate-reactive groups by the isocyanate polyaddition process.Type: GrantFiled: May 15, 1989Date of Patent: June 30, 1992Assignee: Bayer AktiengesellschaftInventors: Willi Dunwald, Reinhard Halpaap, Josef Pedain