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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...
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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...
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6884824 |
Process for preparing an elastomer
Process for preparing a polyurethane elastomer having an apparent overall density of more than 150 kg/m 3 comprising reacting a polyisocyanate and an isocyanate-reactive composition, optionally in...
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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...
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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...
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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...
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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...
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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).
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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...
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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...
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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...
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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,...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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5274007 |
Rigid foams using CHCLF.sub.2 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...
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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.
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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...
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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...
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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...
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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...
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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...
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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 C 3 or higher alkylene oxide, and polyurethane foams prepared...
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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.
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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##...
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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...
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5001167 |
Solvent resistant polyetherpolyurethane products
A polyurethane polymer is prepared from a reaction mixture comprising (a) a polyisocyanate component; and (b) an active hydrogen component containing (i) at least about 50 weight percent...
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4943597 |
Polyether polyol formulations for hard CFC replacement by water blowing in rigid polyurethane foams
Rigid closed-cell polyisocyanate-based foams are prepared by the reaction of polyisocyanate with a polyol composition having an average hydroxyl number of about 100 to about 500 and comprising at...
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4929646 |
Polyurethane foam prepared using high functionality cell openers
Flexible polyurethane foams are prepared using certain high molecular weight, high functionality poly(oxyethylene) compounds as cell openers and softeners. These high functionality polyether...
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4927861 |
Rigid polyurethane preparation process
The present invention relates to the obtention of a rigid polyurethane compound, cellular or micro-cellular, reinforced or not, having a density ranging from 0.20 to 1.30 g/cm 3 ; the formation of...
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4902816 |
Polyols from phthalic compounds
Polyols containing polyether and polyester moieties, based on phthalic acid are described. A phthalic acid derivative is reacted with a polyether polyol to give the novel polyols which are useful...
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4877879 |
Preparation of polyether compositions
In an improved process for the preparation of polyether compositions, amine-initiated, alkaline catalyzed polyethers are neutralized with a substantial excess of formic acid that neutralizes the...
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4863976 |
Polyurethane foam prepared using high functionalilty cell openers
Flexible polyurethane foams are prepared using certain high molecular weight, high functionality poly(oxyethylene) compounds as cell openers and softeners. These high functionality polyether...
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4782099 |
Process for the production of elastic, open-celled flexible polyurethane foams having increased compression hardness
Flexible polyurethane foams having increased compression hardness are produced by reacting an organic polyisocyanate with a mixture of polyols in the presence of a blowing agent and optionally...
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4752626 |
Method of making low compression set urethane foams
This invention generally relates to a high resilience urethane foam (HR foam) having low compression set at a wide range of isocyanate index for use in small void filling in integrated foam parts....
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4743629 |
Crosslinked polyetherurethane membranes useful in blood electrolyte sensors
Partition membranes which are permeable to blood electrolytes fabricated from crosslinked polyetherurethane compositions having from 20 to 50% hard segments. The membranes absorb from 50 to 120% of...
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4722946 |
Energy-attenuating polyurethanes
A non-liquid, energy-absorbing polyurethane is derived from the process which comprises reacting a mixture of linear and branched polyols, a polyisocyanate and, optionally, a blowing agent, under...
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4699932 |
Halogenated-hydrocarbon blown, open-cell, polyurethane foam and a composition and method for the fabrication thereof
The present invention relates generally to open-cell polyurethane foams and, more specifically, to such foams which are halogenated-hydrocarbon blown and are essentially urea-free, together with a...
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4680214 |
Reinforced foam composites
There is disclosed a polyurethane foam of the rigid type having three different types of polyol components capable of having suspended therein fillers and reinforcing fibers. The foam is made into...
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4661532 |
Coal tar containing foaming urethane composition and a method for repairing defects in structural components
Hydrophobic polyurethane compositions can be used to repair or fill-in surface defects in structural components. The hydrophobic composition can be packaged in two parts, a hydrophobic polyol part...
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4642320 |
Reaction injection molded polyureas employing high molecular weight amine-terminated polyethers
Reaction injection molded polyurethanes prepared from a composition comprising (A) a relatively high molecular weight polyol, (B) a chain extender and (C) an aliphatic polyisocyanate or...
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