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| Number | Title | Issue Date |
| 7307136 | Polyurethane elastomers A polyisocyanate-based elastomer having a ratio of the storage modulus (E′) at 20° C. and the storage modulus (E′) at 120° C. of between 0.75 and 1.5, a tan δ at 100° C. of less than 0.1 and a maximum value of the tan δ of more than 0.8, the tan δ being th... | 12/11/2007 |
| 7151121 | Polyurethane containing a polyol composition comprising a highly branched polysaccharide, mix and process for preparation thereof The invention relates to a polyurethane obtainable by reacting a polyisocyanate and a polyol composition comprising a highly branched polysaccharide of randomly bonded glucopyranose units or an alkoxylated derivative of the same. The polysaccharide has an average nu... | 12/19/2006 |
| 6884824 | Process for preparing an elastomer Process for preparing a polyurethane elastomer having an apparent overall density of more than 150 kg/m3 comprising reacting a polyisocyanate and an isocyanate-reactive composition, optionally in the presence of water, wherein the reaction is conducted at... | 04/26/2005 |
| 6846849 | Saccharide-based resin for the preparation of foam An embodiment of the present invention includes a foam prepared from a resin comprising: one or more saccharides; one or more isocyanates; one or more resin polyols; and water. The foam may be for example polyurethane foam or polycyanurate foam, either flexible or r... | 01/25/2005 |
| 6822042 | Saccharide-based resin for the preparation of composite products A novel resin for binding composite lignocellulosic, cellulosic and non-cellulosic products is disclosed. The resin is comprised of one or more isocyanates, one or more saccharides, one or more polyols, and water. Preferaby, the saccharide is a polysaccharide compri... | 11/23/2004 |
| 6710096 | Polyether polyol for foam applications Polyols initiated with a first initiator having a relatively high functionality averaging greater than eight and comprising a range of species of different functionality, and optionally a second initiator, having low functionality, i.e. a two to eight nominal functi... | 03/23/2004 |
| 6495652 | Prepolymers containing isocyanate groups and a method for the production thereof Prepolymers which contain isocyanate groups, have an NCO content of at least 30.0% by weight and can be prepared by reacting an isocyanate mixture consisting predominantly of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates and ha... | 12/17/2002 |
| 6495611 | Polyisocyanate polyaddition products The polyisocyanate polyaddition products comprise hydrophobic compounds plus at least one further compound selected from the group consisting of: (i) organic, cyclic compounds having a molecular weight of from 200 to 3000 g/mol, (ii) salts of metals of tr... | 12/17/2002 |
| 6420446 | Polyurethane prepared from sorbitol-branched polyesters Polyurethanes synthesized from sorbitol-branched polyester made by esterification of a diacid (or anhydride thereof diol, and sorbitol (or mixtures of same with other polyols).... | 07/16/2002 |
| 6228899 | Production of flexible polyurethane foams Flexible foams based on polyisocyanate polyaddition products are produced by reacting polyisocyanates with compounds which are reactive toward isocyanates in the presence of catalysts, blowing agents and, if desired, flame retardants, auxiliaries and/or a... | 05/08/2001 |
| 6114402 | Modified rigid, foamable urethane composition and method 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... | 09/05/2000 |
| 6034197 | Polyol blend, multi-component system for producing polyurethane foam, and foam produced thereby A polyol blend is disclosed for making polyurethane foams. The blend includes a first polyol having a functionality of about 2, a hydroxyl number ranging from about 20 to about 90, and an equivalent weight ranging from about 600 to about 2800; a second po... | 03/07/2000 |
| 6013691 | Expansible sealant compositions and blowing agents The present invention discloses a foam frothing alternative for blowing or frothing single component foams using gases which are incapable of being liquified within the limits of DOT aerosol cans, referred to herein as non-liquefiable gases. In this inven... | 01/11/2000 |
| 5895792 | Production of rigid polyurethane foams In a process for producing rigid polyurethane foams having improved heat distortion resistance and reduced thermal conductivity by reacting a) polyisocyanates with b) compounds containing hydrogen atoms reactive toward isocyanates, in the presence of c) water,... | 04/20/1999 |
| 5874485 | Flexible foams and flexible molded foams based on allophanate-modified diphenylmethane diisocyanates and processes for the production of these foams This invention relates to flexible foams and flexible molded foams prepared from an isocyanate component comprising an allophanate-modified diphenylmethane diisocyanate. The present invention also relates to processes for the production of these flexible ... | 02/23/1999 |
| 5874484 | Use of polyol mixtures in rigid and semi-rigid polyurethane foams The present invention relates to a mixture of polyols for use in the preparation of polyurethane foam comprising: (i) 80-99% by weight of at least one polyether polyol and/or at least one polyester polyol; and (ii) 1-20% by weight of at least one polyolefin po... | 02/23/1999 |
| 5834529 | Pressurized, blowing agent-containing isocyanate semiprepolymer mixtures based on lignin-polyether polyols and their use for producing polyurethane foams Pressurized, blowing agent-containing isocyanate semiprepolymer mixtures advantageously having an isocyanate content of from 5 to 25% and based on organic polyisocyanates and alkoxylated lignin having a hydroxyl number of from 30 to 80, preferably in admi... | 11/10/1998 |
| 5693686 | Foam-forming mixtures with decreased decomposition of hydrohalocarbon blowing agents A polyisocyanate having an acid value of at least 0.01% HCl is used to produce polyisocyanate, polyisocyanurate and polyurethane urea foams with an HCFC blowing agent. The use of such a polyisocyanate is advantageous because the polyisocyanate does not ca... | 12/02/1997 |
| 5690855 | Polyol blend, cellular polyurethane foam product made therefrom, and halogenated hydrocarbon-free process therefor A polyol blend is disclosed for making cellular polyurethane foam products in the absence of halogenated hydrocarbon blowing agents. The products have good insulating performance, good compressive strength, and excellent dimensional stability. The blend c... | 11/25/1997 |
| 5652279 | Polyether polyols suitable for flexible polyurethane foam prepared by co-initiation of aqueous solutions of solid polyhydroxyl initiators Polyoxyalkylene polyether polyols suitable for preparation of flexible polyurethane foams are prepared by oxyalkylating an aqueous solution of one or more polyhydric, hydroxyl-functional solid initiators under conditions where both water as well as initia... | 07/29/1997 |
| 5596059 | Polyether polyols suitable for mflexible polyurethane foam prepared by co-initiation of aqueous solutions of solid polyhydroxyl initiators Polyoxyalkylene polyether polyols suitable for preparation of flexible polyurethane foams are prepared by oxyalkylating an aqueous solution of one or more polyhydric, hydroxyl-functional solid initiators under conditions where both water as well as initia... | 01/21/1997 |
| 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 |
| 5407596 | Polyols for the production of foams with HCFC blowing agents Sucrose-based polyether polyols which do not promote degradation of HCFC blowing agents are produced by blocking at least 10% of the polyol's hydroxyl groups with a compound represented by the formula CH3 COCH2 COOR in which R repres... | 04/18/1995 |
| 5401785 | Foamed polyurethane-forming composition, foamed polyurethane and process making the same Foamed polyurethanes substantially free from non-uniform density distribution are obtained by dispersing an inert gas with mechanical stirring into a foamed polyurethane-forming composition containing substantially no blowing agent and comprising (1) an o... | 03/28/1995 |
| 5373030 | Polyurethane foams having improved retention of insulative properties and methods for the preparation thereof Polyurethane foams can be prepared which have improved retention of insulative properties. The foams are prepared from formulations including a glycerine initiated ethoxylated polyol prepared from a formulation including from about two to about three mole... | 12/13/1994 |
| 5360900 | Aromatic polyester polyol Two methods for preparing polyester-polyether polyols from polyalkylene terephthalates are disclosed. The first method comprises reacting the polyalkylene terephthalate with a solution of low molecular weight polyols and ethoxylated methyl glucoside at a ... | 11/01/1994 |
| 5274007 | Rigid foams using CHCLF2 as a blowing agent A method for preparation of rigid foam disclosed The method comprises mixing at least two components to form a reaction mixture. The reaction mixture comprises isocyanate, up to about 20% by weight CHClF2, up to about 2% by weight of water, and... | 12/28/1993 |
| 5260344 | Open cell rigid isocyanurate foams and method for producing the same and vacuum heat insulating layer by use of the same Rigid isocyanurate foams having a substantially open cell structure are prepared by foaming a mixture of an organic polyisocyanate and a polyol having a NCO/OH equivalent ratio of 3.5 to 13.... | 11/09/1993 |
| 5227409 | Removable polyurethane adhesive A polyurethane adhesive is prepared from a reaction mixture containing small amounts of chain extender material and a high equivalent weight of a polyol and a monoalcohol. An article adhered to a substrate using this adhesive is firmly affixed to the subs... | 07/13/1993 |
| 5225101 | Polyol compositions for producing rigid polyurethane foams A polyol composition for producing rigid polyurethane foams which comprises: (a) a first polyol having the general formula of ##STR1## wherein R independently represents an ethylene group or a propylene group, m and n are integers of not less than 1... | 07/06/1993 |
| 5216040 | Rigid polyurethane foam and process for producing the same A rigid polyurethane foam obtained by foaming a special polyol component and an isocyanate component in the presence of a blowing agent comprising water and at least one member selected from the group consisting of 1,1-dichloro-2,2,2-trifluoroethane and 2... | 06/01/1993 |
| 5194175 | Rigid foams, methods for preparation thereof and compositions useful in methods and preparations thereof A method for preparation of rigid foam disclosed. The method comprises mixing at least two components to form a reaction mixture. The reaction mixture comprises isocyanate, up to about 20% by weight CHClF2, up to about 2% by weight of water, an... | 03/16/1993 |
| 5183830 | Method for the preparation of highly elastic forms of reduced compression hardness having polyurethane groups A method for the preparation of highly elastic foams of reduced compression hardness and having urethane groups is disclosed, in which the reaction of the polyurethane-forming materials is carried in the presence of 0.01 to 5% by weight, based on the poly... | 02/02/1993 |
| 5177119 | Polyurethane foams blown only with water A novel polyurethane resin foam composition is provided which is only water-blown and requires no chlorofluorocarbon or other auxiliary blowing agents, yet suffers little or no degradation in physical properties even at reduced isocyanate indexes. The for... | 01/05/1993 |
| 5137934 | Alkylene oxide adducts and polyurethane foams prepared therefrom This invention relates to alkylene oxide adducts prepared by alkoxylating an initiator, containing polymerized ethylene oxide, with a C3 or higher alkylene oxide, and polyurethane foams prepared therefrom. The invention offers the advantage of ... | 08/11/1992 |
| 5135961 | Stabilized flame retardant polyol composition Polyol compositions comprising a polyol and a halogenated flame retardant are stabilized for storage and handling by the addition of a stabilizing amount of an amine.... | 08/04/1992 |
| 5130344 | Use of polysiloxane polyoxyalkylene block copolymers for the preparation of rigid polyurethane foams A process of preparing rigid polyurethane foams is disclosed, wherein polysiloxane polyoxyalkylene block copolymers which have at least one aminofunctional group of the general formula, ##STR1## which is linked to a silicon atom, are used in an amoun... | 07/14/1992 |
| 5091438 | Method of producing rigid urethane foam A method of producing a rigid urethane foam, which comprises reacting a blend polyol consisting of a polyol having a hydroxyl value of 300 to 450 mg KOH/g as prepared by using an acyclic sugar alcohol of 5 to 6 carbon atoms as an initiator and one or more... | 02/25/1992 |
| 5034425 | Rigid polyurethane foam, process for producing the same, and heat insulators and refrigerators using such polyurethane foam A rigid polyurethane foam produced by reacting a special polyol component with an isocyanate component in the presence of a blowing agent containing water in an amount of 2 to 3.5% by weight per 100% by weight of the polyol component is excellent in fluid... | 07/23/1991 |
| 5032623 | Rigid foams using CHClF2 as a blowing agent A method for preparation of rigid foam disclosed. The method comprises mixing at least two components to form a reaction mixture. The reaction mixture comprises isocyanate, up to about 20% by weight CHClF2, up to about 2% by weight of water, an... | 07/16/1991 |
