N=c=x Reactant Having At Least Two C-nh-c(=x)- Groups, E.g., Prepolymers, Etc. Patents (Class 521/159)
-
Patent number: 6245825Abstract: Process for preparing a flexible foam by reacting a polyisocyanate having a high 4,4′-MDI content and a polyol having a high EO content in the presence of a foaming agent.Type: GrantFiled: July 2, 1996Date of Patent: June 12, 2001Assignee: Imperial Chemical Industries PLCInventor: Geert Bleys
-
Patent number: 6242555Abstract: A process for the production of micro-cellular or non-cellular, light-stable elastomeric, flexible or semi-flexible polyurethane moldings which are especially suited for window encapsulation applications from a reaction mixture by the reaction injection molding process, wherein: A) an isocyanate component containing an isophorone diisocyanate (IPDI) trimer/monomer mixture having an NCO content of from 24.Type: GrantFiled: May 13, 1998Date of Patent: June 5, 2001Assignee: RecticelInventors: Eddie Du Prez, Pierre Coppens
-
Patent number: 6239188Abstract: Urethane molded products for polishing pad comprise two types of cells having different sizes in a urethane molded products formed by mixing and curing an isocyanate-terminated urethane prepolymer and an active hydrogen-containing compound. The molded products may be made by procedure comprising mixing expanded microballoons having a size of 10 to 50 &mgr;m and expanded microballoons having a size of 80 to 100 &mgr;m with the prepolymer and active hydrogen-containing compound and curing the mixture.Type: GrantFiled: August 5, 1999Date of Patent: May 29, 2001Assignee: Fuji Spinning Co., Ltd.Inventors: Katushi Kihara, Yoshimi Mochizuki
-
Patent number: 6235799Abstract: The invention provides a process for preparing flexible to semi-rigid polyurethane moulded items with compacted edge zones with given hardness and a much more flexible cellular core, so-called integral foams, in which physical blowing agents from the set comprising C6 hydrocarbons are used.Type: GrantFiled: November 17, 1999Date of Patent: May 22, 2001Assignee: Bayer AktiengesellschaftInventors: Norbert Eisen, Geza Avar, Peter Haas
-
Patent number: 6225367Abstract: The present invention relates to polymers comprising one or more perfluoroalkylpolyether units and one or more different charged units, to a process for producing such polymers in non-porous or particularly in porous form and to mouldings composed thereof. The novel polymers have an improved wettability and cell growth ability and are thus useful, for example, for the manufacture of biomedical devices, in particular opthalmic devices.Type: GrantFiled: September 16, 1999Date of Patent: May 1, 2001Assignee: Novartis AGInventors: Hassan Chaouk, Timothy Charles Hughes, John Stuart Wilkie, Gordon Francis Meijs
-
Patent number: 6211258Abstract: The use of a tin salt together with a salt of a protic acid having at least 2 acidic hydrogen atoms and a pKa in water of 2-10 in preparing water-blown polyurethane foams.Type: GrantFiled: February 25, 2000Date of Patent: April 3, 2001Assignee: Imperial Chemical Industries PLCInventor: Berend Eling
-
Patent number: 6187832Abstract: Process for preparing a flexible polyurethane foam by reacting a polyisocyanate and two different polyols under foam forming conditions so as to prepare a rigid foam, by crushing the rigid foam so obtained and by subjecting the flexible foam so obtained to a heat treatment. Flexible foams are obtained which do not show a major glass transition temperature between −100° C. and +25° C.Type: GrantFiled: December 21, 1999Date of Patent: February 13, 2001Assignee: Imperial Chemical Industries PLCInventor: Jan Willem Leenslag
-
Patent number: 6184331Abstract: A conductive quasi-solution useful for making a homogeneously conductive single-phase polyurethane, comprising a transition metal salt, a carrier solution, and a dispersing agent, wherein said conductive quasi-solution has a transition metal salt concentration between 10 and 30% by weight, and methods of making thermoset and thermoplastic polyurethane polymers therewith.Type: GrantFiled: December 9, 1999Date of Patent: February 6, 2001Assignee: Mearthane Products CorporationInventors: Albert C. Chiang, John A. Roderick
-
Patent number: 6184262Abstract: Polyether and polyester poloyols and polyurethane foams are stabilized by including therein stabilizers selected from (1) diphenylaminomethylbenzotriazole substituted by alkyl or phenylalkyl groups or (2) synergistic compositions consisting of (a) benzotriazole or alkylbenzotriazole and (b) secondary aromatic amine substituted by alkyl or phenylalkyl groups wherein the benzotriazole and amine is present in critical ratios. Furthermore, a method is disclosed for preparation of polyurethane foams from polyols and polyisocyanate that have reduced discoloration due to scorch by adding diphenylamino methylbenzotriazole or compositions of benzotriazole and secondary aromatic amine as scorch inhibitors to the polyol, foaming the polyol and curing.Type: GrantFiled: September 22, 1997Date of Patent: February 6, 2001Assignee: R. T. Vanderbilt Company, Inc.Inventors: Richard A. Suhoza, Thomas J. Karol, James J. Talbot
-
Patent number: 6156864Abstract: Propylene oxide is added to an active hydrogen compound in the presence of an alkali metal hydroxide catalyst in an amount of from 0.05 to 0.5 mole per mole of the active hydrogen compound at a reaction temperature of from 60 to 98.degree. C. at a reaction pressure less than or equal to 4 kg/cm.sup.2 to prepare a polyoxyalkylene polyol which has a hydroxyl value of from 10 to 35 mg KOH/g, a monool content less than or equal to 15 mol %, a Head-to-Tail bond selectivity greater than or equal to 96 percent, and low viscosity. A polymer polyol is prepared by polymerizing an ethylenically unsaturated monomer in the polyoxyalkylene polyol. A flexible polyurethane foam is prepared by reacting the polyoxyalkylene polyol or the polymer polyol with an organic polyisocyanate compound in the presence of a foaming agent, a catalyst, a surfactant, a crosslinking agent and other additives.Type: GrantFiled: October 30, 1997Date of Patent: December 5, 2000Assignee: Mitsui Chemicals, Inc.Inventors: Kazuhiko Ohkubo, Tomoki Tsutsui, Yoshitsugu Sakaki, Tamotsu Kunihiro, Ariko Nishikawa, Tsukuru Izukawa
-
Patent number: 6147134Abstract: Process for preparing a rigid and a flexible polyurethane foam by reacting a polyisocyanate and two different polyols under foam forming conditions, the polyisocyanate being reacted with said polyols in the absence of compounds comprising primary, secondary or tertiary amines. Flexible foams are obtained which do not show a major glass transition temperature between -100.degree. C. and +25.degree. C.Type: GrantFiled: November 4, 1997Date of Patent: November 14, 2000Assignee: Imperial Chemical Industries PLCInventor: Berend Eling
-
Patent number: 6136870Abstract: Modified or filled rebond polyurethane foam structures having desired plushness and compression without adversely affected tensile strength at a given density as compared to unfilled rebond polyurethane foams are formed from an admixture of shredded or chopped polyurethane foam particles and a finely divided inorganic mineral filler, such as barium sulfate or calcium carbonate or mixtures of these and like mineral fillers, that is further mixed with a substantially non-foam forming liquid prepolymer binder that is free of surfactants in foam-stabilizing amounts. A portion of the polyurethane foam particles, from about 10 to about 60 parts by weight based upon 100 parts by weight, is replaced with filler. For each 100 parts by weight of the combined foam particles and filler, about 10 to about 30 parts by weight of prepolymer is added. After the wetted admixture is compressed to the required density, the prepolymer binder is cured with heat and/or steam.Type: GrantFiled: February 2, 1999Date of Patent: October 24, 2000Assignee: Foamex L.P.Inventors: Rocco P. Triolo, Richard A. Rossow, David J. Kelly
-
Patent number: 6133481Abstract: Improved low density polyurethane foams are prepared from an isocyanate-terminated prepolymer having an NCO content of more than about 31 to about 33.5% by weight comprising:(a) a polyphenylene polymethylene polyisocyanate comprising(i) about 30 to about 100% by weight of diphenylmethane diisocyanate and(ii) the remainder selected from the group consisting essentially of higher homologues of polyphenylene polymethylene polyisocyanate, isocyanate-containing ester groups, urea groups, biuret groups, aliphatic groups, carbodiimide groups, isocyanurate groups, uretdione groups and urethane groups; and(b) a polyoxyalkylene polyol having an oxyethylene content of about 30 to about 90%, a molecular weight of about 1000 to about 12000 and a functionality of about 2 to about 8.Type: GrantFiled: February 10, 1998Date of Patent: October 17, 2000Inventors: Sachchida Nand Singh, Michael John Cartmell, James Holloway
-
Patent number: 6130268Abstract: A two component polyurethane adhesive and a method of bonding construction materials to various construction substrates. The adhesive being the reaction product of two separate components that are mixed together immediately prior to application upon dispensing onto a substrate. The first part of the adhesive, referred to as the "A-side," may be either an NCO terminated prepolymer or a polymeric MDI (methylene diphenyl diisocyanate). The second part of the adhesive, referred to as the "B-side," is a blend of rigid, elastomeric, and flexible polyols and extenders. The adhesive formed by mixing the A-side and B-side components, is a frothing foam that has a consistency such that it does not run or drip when applied to the substrate, that expands upon application to the substrate surface to fill voids or imperfections, that collapses when the material to be bonded is placed in contact with the adhesive, and that has a rapid cure time.Type: GrantFiled: June 4, 1999Date of Patent: October 10, 2000Assignee: Polyfoam Products, Inc.Inventor: Pat L. Murray
-
Patent number: 6114402Abstract: A polyurethane composition to provide a rigid polyurethane foam suitable for use as a core material in a composite laminate and which polyurethane composition includes an additive compound or oligomer-prepolymer having hydroxy groups for reaction with the diisocyanate of the polyurethane or which has been prereacted with a diisocyanate and which contains after the polyurethane reaction ethylenically unsaturated groups, like allyl or acrylic groups, to react with an unsaturated polyester resin. The invention includes the organic additive oligomer-prepolymer and the hybrid polyester-rigid polyurethane laminates.Type: GrantFiled: October 3, 1997Date of Patent: September 5, 2000Assignee: Hehr International Inc.Inventor: Stuart B. Smith
-
Patent number: 6111051Abstract: A conductive quasi-solution useful for making a homogeneously conductive single-phase polyurethane, comprising a transition metal salt, a carrier solution, and a dispersing agent, wherein said conductive quasi-solution has a transition metal salt concentration between 10 and 30% by weight, and methods of making thermoset and thermoplastic polyurethane polymers therewith.Type: GrantFiled: August 7, 1998Date of Patent: August 29, 2000Assignee: Mearthane Products CorporationInventors: Albert C. Chiang, John A. Roderick
-
Patent number: 6100359Abstract: The present invention relates to an ablative fire resistant hydrophilic polyurea foam made from low molecular weight polyols capped with an isocyanate, with the polyol mixture including a fire retardant polyol that preferably includes carborane disilanol, with the fire retardant polyol containing the carborane disilanol imparting superior fire retardancy characteristics. The present invention also relates to a prepolymer for forming the polyurea foam and the present invention especially relates to the use of a carborane disilanol fire retardant polyol. The present invention also relates to a method for forming the polyurea foam and the prepolymer.Type: GrantFiled: December 3, 1998Date of Patent: August 8, 2000Inventor: Sina Ghatan
-
Patent number: 6100310Abstract: Microcellular elastomers and a process for making them are disclosed. The process comprises reacting a resin component ("B" side) with an isocyanate-terminated prepolymer ("A" side). Pre-reacting the right proportion of chain extender into an "A" side that also includes a high-primary, low-unsaturation polyol is the key to making low-density (less than 0.5 g/cm.sup.3) microcellular elastomers while avoiding problems with poor processing or inferior physical properties. The process is easy to practice, and provides lighter, high-quality polyurethane products, including protective sports equipment, arm rests or steering wheels for the auto industry, and midsoles or shoe soles for footwear.Type: GrantFiled: September 25, 1998Date of Patent: August 8, 2000Assignee: Bayer Antwerp N.V.Inventor: David J. Ho
-
Patent number: 6100311Abstract: The use of a tin salt together with a salt of a protic acid having at least 2 acidic hydrogen atoms and a pK.sub.a in water of 2-10 in preparing water-blown polyurethane foams.Type: GrantFiled: November 4, 1997Date of Patent: August 8, 2000Assignee: Imperial Chemical Industries PLCInventor: Berend Eling
-
Patent number: 6096401Abstract: The present invention is a polyurethane carpet backing prepared from a polyurethane-forming composition wherein fly ash is included as a filler material. High loadings of fly ash can be obtained without detriment to the process for preparing a polyurethane carpet backing, or adverse effect to the physical properties of the carpet backing.Type: GrantFiled: August 28, 1996Date of Patent: August 1, 2000Assignee: The Dow Chemical CompanyInventor: Randall C. Jenkines
-
Patent number: 6096238Abstract: The present invention relates to a process for the preparation of CFC-free, flexible polyurethane (molded) foams by reactingA) liquid polyisocyanate mixtures containing bonded urethane groups having a content of NCO groups of from 22 to 30% by weight which are themselves prepared by reacting a mixture of diphenylmethane diisocyanates and polyphenyl-polymethylene polyisocyanates having a content of diphenylmethane diisocyanate isomers of from 55 to 99% by weight, based on the total weight, with at least one trifunctional polyoxypropylene-polyol having a hydroxyl number of from 20 to 60, withB) relatively high-molecular-weight polyhydroxyl compounds and, if desired,C) low-molecular-weight chain extenders and/or crosslinking agents,in the presence ofD) blowing agents,E) catalysts and, if desired,F) auxiliaries and/or additives,and to the polyisocyanate mixtures (A) modified by means of urethane groups which can be used according to the invention.Type: GrantFiled: October 6, 1997Date of Patent: August 1, 2000Assignee: BASF AktiengesellschaftInventors: Heinz-Dieter Lutter, Ruth Zschiesche, Jurgen Mertes, Bernd Bruchmann, Klaus Pittrich, Peter Brandt
-
Patent number: 6090864Abstract: The present invention relates to prepolymers, comprising(a) a polymethylene polyphenylene polyisocyanate; and(b) a polyether polyol having an average hydroxyl equivalent weight of at least about 700;wherein the resulting prepolymer has an average viscosity of between about 400 to about 2000 centipoise at 25.degree. C. The prepolymer is useful, for example, for the production of polyurethane foams and, more particularly, to medium density flexible foams having superior flow characteristic and fast demold times.Type: GrantFiled: April 25, 1997Date of Patent: July 18, 2000Assignee: BASF CorporationInventors: Thirumurti Narayan, Gary E. Brant, Edward W. Cole, III
-
Patent number: 6077456Abstract: This invention is a liquid polyisocyanate prepolymer comprising the reaction product of an organic polyisocyanate blend and a polyoxyalkylene polyol, where polyisocyanate blend isA) a diphenylmethane diisocyanate comprising from 50 weight percent to 95 weight percent 4,4'-diphenylmethane diisocyanate, from 5 weight percent to 50 weight percent 2,4'-diphenylmethane diisocyanate, and less than 10 weight percent 2,2'-diphenylmethane diisocyanate, said weight percentages based on the total weight of the ingredients in A);B) a polymethylene polyphenyl polyisocyanate comprising from 30 weight percent to 70 weight percent diphenylmethane diisocyanate, the remainder comprising polymethylene polyphenyl polyisocyanates having functionalities greater than two, said weight percentages based on the total weight of the ingredients in B);C) and optionally a uretonimine-carbodiimide modified diisocyanate comprising from 10 weight percent to 35 weight percent uretonimine-carbodiimide species, the remainder comprising essentiaType: GrantFiled: June 20, 1994Date of Patent: June 20, 2000Assignee: BASF CorporationInventor: Thirumurti Narayan
-
Patent number: 6069184Abstract: A method for the production of polyurethane elastomers by reacting an isocyanate epolymer having an isocyanate content of from 5 to 10% by weight which is the reaction product of an excessive amount of a polyisocyanate containing at least 85% by weight of 4,4'-diphenylmethane diisocyanate or a variant thereof and a polyether polyol having an average nominal hydroxyl functionality of from 2 to 4, an average hydroxyl equivalent weight of from 500 to 3000, and an oxyethylene content of from 50 to 85% by weight, with an aqueous latex to form a foam, and compressing said foam.Type: GrantFiled: March 10, 1998Date of Patent: May 30, 2000Assignee: Imperial Chemical Industries PLCInventors: Gerhard Jozef Bleys, Alan James Hamilton, Edward Francis Cassidy
-
Patent number: 6054499Abstract: A prepolymer composition for producing polyurethane insulating foams from pressure tanks which consists of a prepolymer component with at least one PU prepolymer with a content of NCO groups of 4 to 20 wt % and usual additives, as well as a propellant component, with a content of 0.01 to 2 wt %, based on the prepolymer component, of polybutadiene.Type: GrantFiled: October 16, 1995Date of Patent: April 25, 2000Assignee: Rathor AGInventors: Mathias Pauls, Rene Schumacher
-
Patent number: 6051622Abstract: Molded polyurethane seating foams exhibiting low resonant frequencies and low ball rebound are produced by reacting an isocyanate-terminated prepolymer prepared from a polyol component comprising in major part one or more low intrinsic unsaturation substantially polyoxypropylene polyols and/or polymer polyols with a blowing/chain extending stream comprising water and optionally amines and alkanolamines.Type: GrantFiled: September 17, 1998Date of Patent: April 18, 2000Assignee: Arco Chemical Technology, L.P.Inventors: Mark R. Kinkelaar, Andrew M. Thompson, Daniel P. Krisher
-
Patent number: 6046249Abstract: A method for preparing a polyurethane flexible or rigid foam by reacting an organic polyisocyanate with a polyol in the presence of urethane catalyst, water as a blowing agent, optionally a silicone surfactant, and a cell opener characterized in that the cell opener comprises the reaction product of a C1-C20 hydrocarbyl group-containing organic acid anhydride and a substituted phenol which may be alkoxylated or an alkoxylated primary alcohol, optionally reacted in the presence of a tertiary amine urethane catalyst.Type: GrantFiled: June 23, 1999Date of Patent: April 4, 2000Assignee: Air Products and Chemicals, Inc.Inventors: James Douglas Tobias, Julia Renae Bennett, Gary Dale Andrew, John Elton Dewhurst, Robert G. Petrella
-
Patent number: 6037382Abstract: Process for making flexible polyurethane foams using MDI and TDI and a polyol composition comprising dispersed particulate material.Type: GrantFiled: March 17, 1998Date of Patent: March 14, 2000Assignee: Imperial Chemical Industries PLCInventor: Eric Huygens
-
Patent number: 6034149Abstract: Hydrophilic flexible polyurethane foam which foam is in a compressed state above its glass transition temperature and at ambient pressure in the absence of force suitable to create the compressed state.Type: GrantFiled: July 9, 1998Date of Patent: March 7, 2000Assignee: Imperial Chemical Industries PLCInventors: Gerhard Jozef Bleys, Dirk Gerber, Henk Grymonprez
-
Patent number: 6031010Abstract: The present invention relates to a process for preparing a flexible polyurethane foam from the reaction of a polyisocyanate composition prepared from the reaction of an excess of organic polyisocyanate and a polyether polyol having a high ethylene oxide content and an isocyanate reactive composition comprising a chain extending agent and a combination of a polyether polyol having a high ethylene oxide content and a random copolymer having a high ethylene oxide content, and the product prepared therefrom.Type: GrantFiled: August 11, 1997Date of Patent: February 29, 2000Assignee: Imperial Chemical Industries PLCInventor: Nai Wen Lin
-
Patent number: 6022903Abstract: Microcellular polyurethane elastomers having sharply reduced or virtually no urea linkages may be prepared without resort to organic physical blowing agents by frothing a frothable mixture containing isocyanate reactive polyols and chain extenders, and a frothable isocyanate component. The isocyanate component is derived by reacting a stoichiometric excess of a di- or polyisocyanate with a polyol component containing an ultra-low unsaturation polyol. The froth-produced elastomers surprisingly exhibit greatly improved tear strengths, compression set, and other physical properties as compared to all water-blown microcellular elastomers of the same density.Type: GrantFiled: July 9, 1998Date of Patent: February 8, 2000Assignee: Arco Chemical Technology L.P.Inventors: Usama E. Younes, Gary L. Allen, Nigel Barksby
-
Patent number: 6020390Abstract: Process for preparing a flexible polyurethane foam by reacting a polyisocyanate and two different polyols under foam forming conditions so as to prepare a rigid foam, by crushing the rigid foam so obtained and by subjecting the flexible foam so obtained to a heat treatment. Flexible foams are obtained which do not show a major glass transition temperature between -100.degree. C. and +25.degree. C.Type: GrantFiled: November 4, 1997Date of Patent: February 1, 2000Assignee: Imperial Chemical Industries PLCInventor: Jan Willem Leenslag
-
Patent number: 6020391Abstract: Process for preparing a flexible polyurethane foam by reacting a polyisocyanate and two different polyols under foam forming conditions so as to prepare a rigid foam and by crushing the rigid foam so obtained in a direction perpendicular to the direction of rise of the foam. Flexible foams are obtained which do not show a major glass transition temperature between -100.degree. C. and +25.degree. C. and which have an anisotropy of 1.80 to 4.00.Type: GrantFiled: November 4, 1997Date of Patent: February 1, 2000Assignee: Imperial Chemical Industries PLCInventor: Jan Willem Leenslag
-
Patent number: 6013692Abstract: Cellular Polyurethane elastomer which is produced by reacting:(a) an isocyanate component which includes methylenebis(phenyl isocyanate) (MDI) and/or tolylene diisocyante (TDI), in monomeric form or as liquefied prepolymer with(b) compounds which at least two isocyanate-reactive hydrogen atoms and(c) 4,4'-methylenebis(3-chloro-2,6-dialylaniline) or a mixture of 4,4'-methylenebis-(3-chloro-2,6-dialyaniline) with one or more aromatic, aliphatic or cycloaliphatic diamines as chain extending agent, if desired with further polyol, and(d) a blowing agent in the presence of the usual catalysts and, if desired, other additives.Type: GrantFiled: December 17, 1998Date of Patent: January 11, 2000Assignee: Lonza AGInventors: Ulrich Daum, Arno Feeken, Wolfgang Jarre, Andreas Schmidt, Reinhard Sklenarz
-
Patent number: 6013690Abstract: The present invention relates to polyurethane foams employing an imidazole compound having enhanced substrate adhesion characteristics at relatively low mold temperatures. Additionally, the present invention relates to resin compositions employed in the polyurethane foams and methods of producing polyurethane foams employing the resins.Type: GrantFiled: October 23, 1997Date of Patent: January 11, 2000Assignee: BASF CorporationInventors: Robert S. Coleman, Allan H. Syrop
-
Patent number: 5968993Abstract: A method for the preparation of microcellular elastomeric polyurethane foams from a reaction mixture comprising a polyisocyanate component containing at least 85% by weight of 4,4'-diphenylmethane diisocyanate or a variant thereof, a polyol composition comprising at least one polyoxyalkylene polyol having an average nominal hydroxyl functionality of from 2 to 6, an average hydroxyl equivalent weight of at least 1300 and an average oxyethylene content of between 50 and 85% by weight, water, a chain extender having an average hydroxyl equivalent weight of from 15 to 250 and optionally a crosslinking agent, the hardblock-content being more than 45% by weight.Type: GrantFiled: June 10, 1997Date of Patent: October 19, 1999Assignee: Imperial Chemical Industries PLCInventor: Gerard Jozef Bleys
-
Patent number: 5968995Abstract: A polyisocyanate prepolymer composition is comprised of the reaction product of (a) a polyisocyanate having an average functionality of at least 2 and containing at least about 20 percent by weight of a diisocyanate monomer, (b) a monohydric alcohol and (c) a polyol having an average hydroxyl functionality of at least about 1.8 to at most about 3.2, wherein the prepolymer composition has (i) an amount of isocyanate groups by weight sufficient to react with water in the absence of a supplemental blowing agent to make a foam, (ii) at most about 10.0 percent by weight of the diisocyanate monomer and (iii) an amount of the polyisocyanate that is capped by the monohydric alcohol sufficient to prevent gelling of the prepolymer composition. The prepolymer composition may be formed by contacting (i) an organic polyisocyanate having an average isocyanate functionality of at least about 2.Type: GrantFiled: July 21, 1998Date of Patent: October 19, 1999Assignee: The Dow Chemical CompanyInventors: Sidky D. Rizk, Jerry Lynn Spradling, Brad A. Pearson
-
Patent number: 5962541Abstract: NCO-terminated prepolymers are made by reacting a polymeric diphenylmethane diisocyanate (PMDI) and a polyol having a functionality of from about 1.8 to about 4.0 and a molecular weight of from about 400 to about 2,000. The PMDI and polyol are reacted in amounts such that the equivalent ratio of isocyanate groups to hydroxyl groups is from about 15:1 to about 160:1. These prepolymers are useful in the production of polyurethane foams, particularly laminated foams.Type: GrantFiled: June 10, 1998Date of Patent: October 5, 1999Assignee: Bayer CorporationInventors: Brian H. Peterson, Frank C. Rossitto, William J. Nicola, Jr., Clarence D. Blue
-
Patent number: 5958991Abstract: A novel methodology and apparatus have been discovered which is of value in the production of polyurethane foam. This invention relates to a one-pass, on-demand process and apparatus for producing a controlled, homogeneous blend of the polyol-blowing agent mixture used in the manufacture of polyurethane foam using either a low-boiling point or high-boiling point blowing agent. A method is provided to control the amount of each material in the mixture, ensure homogeneous blending of the two materials after mixing, a pressure control means to maintain blowing agents in their liquid state (where necessary), and a monitoring means which allows rapid verification of the operating status of the entire system.Type: GrantFiled: August 2, 1996Date of Patent: September 28, 1999Inventor: Henry Walker Bartlett, Jr.
-
Patent number: 5951796Abstract: A two component polyurethane adhesive and a method of bonding construction materials to various construction substrates. The adhesive being the reaction product of two separate components that are mixed together immediately prior to application upon dispensing onto a substrate. The first part of the adhesive, referred to as the "A-side" is a polyisocyanate prepolymer, preferably a polymeric MDI (methylene diphenyl diisocyanate) based prepolymer. The second part of the adhesive, referred to as the "B-side" is a blend of elastomeric and flexible polyglycols. The adhesive formed by mixing the A-side and B-side components, is a frothing foam that has a consistency such that it does not run or drip when applied to the substrate, that expands upon application to the substrate surface to fill voids or imperfections, that collapses when the material to be bonded is placed in contact with the adhesive, and that has a rapid cure time.Type: GrantFiled: June 23, 1997Date of Patent: September 14, 1999Assignee: Polyfoam Products, Inc.Inventor: Pat L. Murray
-
Patent number: 5925781Abstract: This invention relates to novel liquid, homogeneous toluene diisocyanate/polyether/polymethylene poly(phenylisocyanate) prepolymers having an NCO content of from about 2 to 16%, a viscosity or about 10,000 mPa.s or less at room temperature, and which contains about 1.0% or less of free monomeric TDI. This invention also relates to a process for the preparation of these liquid, homogeneous toluene diisocyanate/polyether/-polymethylene poly(phenylisocyanate) prepolymers.Type: GrantFiled: November 3, 1997Date of Patent: July 20, 1999Assignee: Bayer CorporationInventors: Richard S. Pantone, Peter H. Markusch
-
Patent number: 5919988Abstract: Double metal cyanide-catalyzed polyols are made by an improved process in which a starter is continuously added during polymerization of the epoxide. The process includes a continuously added starter (S.sub.c), and optionally, an initially charged starter (S.sub.i). The continuously added starter comprises at least about 2 equivalent percent of the total starter used. The process enables the use of water and low molecular weight polyol starters in DMC-catalyzed polyol synthesis. In addition, the process gives polyether polyols having reduced levels of high molecular weight polyol tail, which can adversely affect polyurethane foam processing.Type: GrantFiled: February 9, 1998Date of Patent: July 6, 1999Assignee: Arco Chemical Technology, L.P.Inventors: Jose F. Pazos, Veril C. Jividen
-
Patent number: 5916994Abstract: Propylene oxide is added to an active hydrogen compound in the presence of an alkali metal hydroxide catalyst in an amount of from 0.05 to 0.5 mole per mole of the active hydrogen compound at a reaction temperature of from 60 to 98.degree. C. at a reaction pressure less than or equal to 4 kg/cm.sup.2 to prepare a polyoxyalkylene polyol which has a hydroxyl value of from 10 to 35 mg KOH/g, a monool content less than or equal to 15 mol %, a Head-to-Tail bond selectivity greater than or equal to 96 percent, and low viscosity. A polymer polyol is prepared by polymerizing an ethylenically unsaturated monomer in the polyoxyalkylene polyol. A flexible polyurethane foam is prepared by reacting the polyoxyalkylene polyol or the polymer polyol with an organic polyisocyanate compound in the presence of a foaming agent, a catalyst, a surfactant, a crosslinking agent and other additives.Type: GrantFiled: October 30, 1997Date of Patent: June 29, 1999Assignee: Mitsui Chemicals, Inc.Inventors: Tsukuru Izukawa, Tamotsu Kunihiro, Ariko Nishikawa
-
Patent number: 5900441Abstract: Process for preparing a flexible foam by reacting a polyisocyanate composition having an NCO value of 11-24% by weight with an isocyanate-reactive compound having a number average molecular weight of 1000-12000 using water as blowing agent.Type: GrantFiled: October 29, 1996Date of Patent: May 4, 1999Assignee: Imperial Chemical Industries PLCInventors: Mireille Berthine Albert De Witte, Eric Huygens, Luc Van Essche, Leo Franciscus Verstrepen
-
Patent number: 5898057Abstract: A conductive quasi-solution useful for making a homogeneously conductive single-phase polyurethane, comprising a transition metal salt, a carrier solution, and a dispersing agent, wherein said conductive quasi-solution has a transition metal salt concentration between 10 and 30% by weight, and methods of making thermoset and thermoplastic polyurethane polymers therewith.Type: GrantFiled: May 27, 1997Date of Patent: April 27, 1999Assignee: Mearthane Products Corp.Inventors: Albert C. Chiang, John A. Roderick
-
Patent number: 5889068Abstract: This invention relates to molded articles comprising micro cellular polyurethane foams, preferably integral skin foams. These exhibit improved properties and are particularly suitable for soling systems in footwear. The present invention also relates to a process for the production of these molded articles. These molded articles comprise the reaction product of (A) an isocyanate comprising a stable, liquid MDI based prepolymer containing an allophanate-modified MDI, with (B) an isocyanate reactive component, in the presence of (C) at least one blowing agent.Type: GrantFiled: July 24, 1997Date of Patent: March 30, 1999Assignee: Bayer CorporationInventors: Edmund J. Madaj, William E. Slack
-
Patent number: 5880167Abstract: The invention relates to polyurethane compositions with a low content of monomeric diisocyanates. Trifunctional isocyanates optionally reduced in their functionality to 3.0.+-.0.7 with a monofunctional terminator are preferably used for this purpose. In this way, the compositions contain considerably smaller quantities of readily volatile isocyanates. The compositions are suitable for use as reactive hotmelt adhesives, lamination adhesives, adhesive/sealing compounds, primers and for the production of foam plastics from non-reusable pressurized containers (aerosol cans). The low content of volatile monomeric diisocyanates enables the need for safety measures in the workplace to be significantly reduced, in addition to which the disposal of residues remaining in the containers is made considerably easier.Type: GrantFiled: March 27, 1997Date of Patent: March 9, 1999Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Michael Krebs, Gerd Bolte, Christa Dernst-Mentges, Guenter Henke, Wolfgang Klauck, Hermann Kluth, Manfred Schumann
-
Patent number: 5880165Abstract: Modified or filled rebond polyurethane foam structures having desired plushness and compression without adversely affected tensile strength at a given density as compared to unfilled rebond polyurethane foams are formed from an admixture of shredded or chopped polyurethane foam particles and a finely divided inorganic mineral filler, such as barium sulfate or calcium carbonate or mixtures of these and like mineral fillers, that is further mixed with a substantially non-foam forming liquid prepolymer binder. A portion of the polyurethane foam particles, from about 10 to about 60 parts by weight based upon 100 parts by weight, is replaced with filler. For each 100 parts by weight of the combined foam particles and filler, about 10 to about 30 parts by weight of prepolymer is added. After the wetted admixture is compressed to the required density, the prepolymer binder is cured with heat and/or steam.Type: GrantFiled: May 1, 1997Date of Patent: March 9, 1999Assignee: Foamex L.P.Inventors: Rocco P. Triolo, Richard A. Rossow, David J. Kelly
-
Patent number: 5877227Abstract: The present invention is directed to a low density flexible polyurethane foam and the process of making the same from a polyisocyanate composition and an isocyanate reactive composition wherein the polyisocyanate composition comprises a semi-prepolymer which is the reaction product of an excess of a base isocyanate formulation with a polyoxyethylene polyol, said base isocyanate formulation comprising a mixture of diphenylmethane diisocyanate and polyphenylpolymethylene polyisocyanate, said diphenylmethane diisocyanate comprising, inter alia, 2, 4'-MDI in prescribed amounts, whereby the functionality of the base isocyanate formulation ranges from 2.07 to 2.12 and said isocyanate reactive composition comprises water, a second polyoxyethylene polyol, a cross-linker and catalyst.Type: GrantFiled: August 11, 1997Date of Patent: March 2, 1999Assignee: Imperial Chemical Industries PLCInventor: Vabilisetti S. Murty
-
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