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| Number | Title | Issue Date |
| 5489620 | Process for making flexible foams A method for the preparation of flexible polyurethane foams by reacting a prepolymer having an NCO value of 5-10% by weight which is the reaction product obtained by reacting an excessive amount of a polyisocyanate containing at least 85% by weight of 4,4... | 02/06/1996 |
| 5488074 | Polyetheresterols, their preparation, and their use in polyurethanes The invention relates to polyetheresterols obtained by condensation of a polyfunctional carboxylic acid with an alcohol component, wherein the alcohol component comprises a mixture of alkanediols and etherdiols of the formula ##STR1## where m=1 ... | 01/30/1996 |
| 5488073 | Azeotropic compositions of 1,1,1,4,4,4-hexafluorobutane and N-pentane and the use thereof in the production of foams An azeotropic composition made up of from about 73 to about 87% by weight of 1,1,1,4,4,4-hexafluorobutane and from about 13 to about 27% by weight of n-pentane is used as a blowing agent in a process for the production of polyurethane foams.... | 01/30/1996 |
| 5488072 | Rigid closed cell polyisocyanate based foams for use as positive flotation materials in watercraft There is now provided a rigid closed cell polyisocyanate based foam for use as a positive flotation material for watercraft which meets the U.S. Coast Guard immersion test (CGD 75-168, 33 C.F.R. .sctn.183.114). As a blowing agent for this foam, a mixture ... | 01/30/1996 |
| 5488071 | Polyoxyalkylene polyether monool polyurethane foam additive There is now provided a polyol composition containing a polyol having polyester linkages, an aliphatic or cycloaliphatic C4 -C7 hydrocarbon blowing agent, and a polyoxyalkylene polyether monool initiated with a C8 -C2... | 01/30/1996 |
| 5484817 | Polyoxyalkylene polyether monool polyurethane foam additive There is now provided a polyol composition containing a polyol having polyester linkages, an aliphatic or cycloaliphatic C4 -C7 hydrocarbon blowing agent, and a polyoxyalkylene polyether monool initiated with a C8 -C2... | 01/16/1996 |
| 5484820 | Polyurethane foam for packaging applications Disclosed is a water-blown methylene diphenylisocyanate-based polyurethane foam for use in packaging of shock or vibration sensitive goods, and a process for its manufacture from a particular polyol composition. The polyurethane foam exhibits a broad shoc... | 01/16/1996 |
| 5478494 | Polyol composition having good flow and formic acid blown rigid polyurethane foams made thereby having good dimensional stability A polyol composition is provided which when reacted with an organic isocyanate, has good flow characteristics and makes a rigid polyurethane foam having good dimensional stability at low densities. The polyol compostion has a polyol component which must h... | 12/26/1995 |
| 5472989 | Aezotropic compositions of 1,1,1,4,4,4-hexafluorobutane and n-pentane and the use thereof in the production of foams An azeotropic composition made up of from about 73 to about 87% by weight of 1,1,1,4,4,4-hexafluorobutane and from about 13 to about 27% by weight of n-pentane is used as a blowing agent in a process for the production of polyurethane foams.... | 12/05/1995 |
| 5470891 | Dimensionally stable closed cell rigid polyisocyanate based foam prepared from a froth foaming mixture There is now provided a closed cell rigid polyisocyanate based foam blowing with a C1 -C4 hydrofluorocarbon and water as blowing agents, which possesses a uniform density gradient varying by not more than 10 percent. There is also no... | 11/28/1995 |
| 5468420 | Polyol compositions and rigid polyisocyanate based foams containing 2-chloropropane and aliphatic hydrocarbon blowing agents There is provided a polyol composition which comprises a a) compound having at least two isocyanate reactive hydrogens, at least one of which is a polyoxyalkylene polyether polyol, b) 2-chloropropane, and, c) a C4 -C6 aliphatic hydrocarbon. Th... | 11/21/1995 |
| 5464561 | Methods and compositions for preparing rigid foams with non-chlorofluorocarbon blowing agents Disclosed are methods and compositions for preparing rigid foams by contacting a polyisocyanate with a polyol mixture comprising (a) from about 40-95% by weight of a polyester or polyether polyol; (b) a catalytic amount of a catalyst system comprising a primary cat... | 11/07/1995 |
| 5464879 | 1,1,1,2-tetrafluoroethane as a blowing agent in integral skin polyurethane shoe soles It has been found that 1,1,1,2-tetrafluoroethane (HFC-134a) may be used alone or in combination with water as blowing agents in flexible integral skin foams. Foams prepared using HFC-134a alone or in combination with water exhibit physical characteristics... | 11/07/1995 |
| 5464560 | Foam-forming mixtures with decreased decomposition of hydrohalocarbon blowing agents An organic acid having at least two carboxylic acid groups, no tertiary amino groups and a pKa of up to 3.1 is added to an HCFC blowing agent or to a composition, preferably an isocyanate-reactive composition, in which an HCFC blowing agent is ... | 11/07/1995 |
| 5464880 | Process for the CFC-free production of cellular polyurethane molded parts A process for the CFC-free production of cellular polyurethane molded parts/articles with solid surfaces by reacting a reaction mixture of per se known starting materials in sealed molds, to yield polyurethane foams. Carbamates obtainable from aliphatic a... | 11/07/1995 |
| 5461084 | Rigid foams with improved insulation and physical properties Rigid polyurethane foams are produced by reacting an organic polyisocyanate with an amine-based polyether polyol in the presence of a catalyst, a hydrogen-containing fluorocarbon and a minor amount of water. These foams are characterized by K-factors whic... | 10/24/1995 |
| 5459170 | Polyurethane foams A method for the preparation of flexible polyurethane foams by reacting a polyisocyanate containing at least 85% by weight of 4,4'-diphenylmethane diisocyanate or a liquid variant thereof with a polyol composition comprising at least one poly(oxyethylene-... | 10/17/1995 |
| 5459221 | Polyisocyanate compositions for the preparation of flexible polyturethane foams The invention provides a liquid polyisocyanate prepolymer composition which is a result of combining about 50 to 90 percent by weight of an isocyanate blend (a.) having 55 to 75 weight percent 4,4'-MDI, 17 to 27 weight percent 2,4'-MDI, 1 to 10 weight per... | 10/17/1995 |
| 5459172 | Process for manufacturing polyurethane foams The present invention is directed to flexible polyurethane foams useful as seat cushioning material for vehicles, aircraft, furniture and the like. The polyurethane foams are characterized by improved wet compression set properties, improved firmness, res... | 10/17/1995 |
| 5457137 | Water blown, energy absorbing foams A novel isocyanate reactive mixture is described which allows for the preparation of energy absorbing foams which meet Chrysler specification DC-640. The reactive mixture contains a) a filled polyol, b) a propylene oxide adduct of a mono-, di-, or trialka... | 10/10/1995 |
| 5457138 | Method for producing open cell rigid polyurethane foam A method of producing an open cell rigid polyurethane foam which comprises reacting a polymethylene polyphenylisocyanate prepolymer with a polyol at an NCO/OH equivalent ratio of 1.3 to 3.0 by use of a blowing agent substantially comprising water in the p... | 10/10/1995 |
| 5455283 | Dimensionally stable closed cell rigid polyisocyanate based foam prepared from a froth foaming mixture There is now provided a closed cell rigid polyisocyanate based foam blowing with a C1 -C4 hydrofluorocarbon and water as blowing agents, which possesses a uniform density gradient varying by not more than 10 percent. There is also no... | 10/03/1995 |
| 5451614 | Dimensionally stable closed cell rigid polyisocyanate based foam prepared from a froth foaming mixture There is now provided a closed cell rigid polyisocyanate based foam blowing with a C1 -C4 hydrofluorocarbon and water as blowing agents, which possesses a uniform density gradient varying by not more than 10 percent. There is also no... | 09/19/1995 |
| 5451615 | Process for preparing polyurethane foam in the presence of a hydrocarbon blowing agent Disclosed is a process for preparing a rigid, hydrocarbon blown, polyurethane foam by reacting a polyisocyanate with a polyol composition comprising a fatty oil. The fatty oil has a fatty acid content, especially a hydroxyl-substituted fatty acid, which e... | 09/19/1995 |
| 5449700 | Water blown, energy absorbing foams The present invention is directed to an isocyanate reactive mixture of specified amounts of a) a polyether polyol having a hydroxyl functionality of from 4 to 8 and having a hydroxyl number of from about 300 to about 450, b) a polyether polyol having a hy... | 09/12/1995 |
| 5447964 | Dimensionally stable closed cell rigid polyisocyanate based foam prepared from a froth foaming mixture There is now provided a closed cell rigid polyisocyanate based foam blowing with a C1 -C4 hydrofluorocarbon and water as blowing agents, which possesses a uniform density gradient varying by not more than 10 percent. There is also no... | 09/05/1995 |
| 5444099 | Tertiary aminoalcohol ane process for producing the same, and, polyurethane and process for producing the same A tertiary aminoalcohol having a tert-amino group(s) in the main chain and hydroxyl groups at the terminals. The use of this compound for purposes different from that of ordinary amines and amine derivatives is expected. A process for producing the tertiary am... | 08/22/1995 |
| 5441993 | Polyurethane foams Process for preparing a flexible foam from a polyisocyanate, water as blowing agent and an isocyanate-reactive composition comprising a polyol with a low ethylene-oxide (EO) content, a polyol with a high EO content and an amine chain extender/cross-linker... | 08/15/1995 |
| 5439948 | Process for cellular polymeric products The invention provides a process for the preparation of a cellular polymeric product which comprises reaction of a polyisocyanate composition with an isocyanate-reactive composition having a functionality of at least 2, in the presence of a blowing agent ... | 08/08/1995 |
| 5436277 | Polyisocyanate compositions for the preparation of flexible polyurethane foams The invention provides a liquid polyisocyanate prepolymer composition which is a result of combining about 50 to 90 percent by weight of an isocyanate blend (a.) having 55 to 75 weight percent 4,4'-MDI, 17 to 27 weight percent 2,4'-MDI, 1 to 10 weight per... | 07/25/1995 |
| 5430071 | Dimensionally stable closed cell rigid polyisocyanate based foam prepared from a froth foaming mixture There is now provided a closed cell rigid polyisocyanate based foam blowing with a C1 -C4 hydrofluorocarbon and water as blowing agents, which possesses a uniform density gradient varying by not more than 10 percent. There is also no... | 07/04/1995 |
| 5428077 | Process for producing isocyanate-based foams Isocyanate-based foams are produced by the reaction of polyisocyanates with compounds with molecular weights of from 400 to 10,000 and having at least two hydrogen atoms active towards isocyanates in the presence of hydrocarbons which are vaporizable unde... | 06/27/1995 |
| 5424338 | Rigid hydrophilic polyurethane foams The invention relates to rigid, open-celled hydrophilic polyurethane foams obtained by reacting in the presence of water as a blowing agent and a polyisocyanate with a polyhydric polyamine initiated polyether polyol. The polyether polyol is initiated with... | 06/13/1995 |
| 5422380 | Sound absorbing and decoupling syntactic foam There is disclosed a sound-absorbing syntactic foam comprising expanded polystyrene microspheres, dispersed randomly in a polyurethane matrix.... | 06/06/1995 |
| 5420167 | Flame resistant rigid polyurethane foams containing phosphorus and a halogen There is now provided a closed cell rigid polyurethane foam having improved flame resistance by empolying a combination of an organo-phosphorus compound having at least two isocyanate reactive hydrogens with a secondary or tertiary mono-halogenated alipha... | 05/30/1995 |
| 5420170 | Preparation of flexible, soft polyurethane foams having viscoelastic, structure-borne soundproofing properties, and polyoxyalkylene-polyol mixtures which can be used for this purpose The present invention relates to a process for the preparation of flexible, soft polyurethane foams having viscoelastic, structure-borne soundproofing properties in a temperature range of from -20° C. to +80° C. by reacting a) a polyoxyalkylene-polyol m... | 05/30/1995 |
| 5418259 | Process for preparing polyurethane elastomer from a soft-segment isocyanate-terminated prepolymer This invention relates to a process of preparing polyurethane polymers by reaction of an isocyanate composition having an isocyanate equivalent weight of from 180 to 300 and comprising in from at least 50 weight percent a prepolymer, with an active hydrog... | 05/23/1995 |
| 5418261 | Polyurethane foams A method for the preparation of shape memory polyurethane foams by reacting a polyisocyanate component and a polyol composition in the presence of a foaming agent comprising water wherein the polyisocyanate component contains at least 85% by weight of 4,4... | 05/23/1995 |
| 5418260 | Process for the production of polyurethane articles from uretonimine based compositions and ethylene oxide rich polyether polyols This invention relates to a polyurethane RIM composition, a method of spray molding a polyurethane composition and molded articles of a polyurethane RIM composition.... | 05/23/1995 |
| 5418258 | Process for the production of substantially closed-cell rigid foams containing urethane, urea and biuret groups showing excellent adhesion to solid surfaces and their use Substantially closed-cell rigid foams containing urethane, urea and biuret groups are produced by reacting an NCO terminated prepolymer with a compound having at least two isocyanate-reactive hydrogen atoms and a molecular weight of from about 400 to abou... | 05/23/1995 |
