Abstract: A three component composition consisting of a polyol component (A) including at least two polyols, one with high, one with low molecular weight and water, a polyisocyanate component (B) including a methylene diphenyl diisocyanate (MDI) product with an average NCO functionality of at least 2.5, or a methylene diphenyl diisocyanate (MDI) product with an average NCO functionality of at least 2 and at least one further polyol with an amount of between 1% and 30% based on the weight of the polyisocyanate component (B), wherein the MDI product and the polyol have reacted at least partially, and a powder component (C) including at least one hydraulic binder, preferably cement and/or calcined paper sludge, preferably a calcium compound selected from calcium hydroxide and/or calcium oxide, and optionally one or more aggregates.

Abstract: It discloses a polyether polyols for preparing flexible polyurethane foam, and a preparation method and application thereof. The method comprises the following steps: (1) carrying out a reaction on phosphorus oxychloride, epichlorohydrin, a first acidic catalyst and an inert solvent in a first microchannel reactor to obtain a chloroalkoxy phosphorus compound; (2) carrying out a reaction on the chloroalkoxy phosphorus compound, glycidol, a second acidic catalyst and an inert solvent in a second microchannel reactor to obtain a hydroxy compound; (3) carrying out a ring-opening reaction on the hydroxy compound, epoxy vegetable oil, a basic catalyst and an inert solvent in a third microchannel reactor to obtain a vegetable oil polyol; and (4) carrying out an addition polymerization reaction on the vegetable oil polyol, propylene oxide and an inert solvent in a fourth microchannel reactor to obtain the polyether polyols for preparing flexible polyurethane foam.

Abstract: There is provided a polymerizable composition for an optical material including a polyether-modified compound having a polyether group represented by General Formula (4) below, and a polymerization reactive compound. (In General Formula (4), R25 represents a linear or branched alkylene group having 1 to 20 carbon atoms, R26 represents a hydrogen atom, a linear or branched alkyl group having 1 to 20 carbon atoms, a linear or branched alkenyl group having 2 to 20 carbon atoms, or a linear or branched alkynyl group having 2 to 20 carbon atoms, a plurality of present R25's may be the same or different, and k is an integer equal to or more than 1.

Abstract: Provided are: an isocyanate composition for producing a flexible foam that has good vibration absorption as a result of having a low rebound resilience rate and a low hysteresis loss rate even in a low-density area; a composition for forming a flexible foam in which the isocyanate composition is used; and a flexible foam production method in which the composition for forming a flexible foam is used. The composition for forming a flexible foam has a low hysteresis loss rate and high durability in, a high hardness range and in a low density range. The flexible foam production method uses this composition for forming a flexible foam. The flexible foam production method does not cause odor problems or the like, maintains the durability required of a flexible foam even when the density thereof is reduced, and achieves good riding comfort properties and high safety.

Abstract: The invention relates to a production process for di- and polyamines of the diphenylmethane series by the rearrangement of a condensation product of aniline and a methylene group-supplying agent preferably selected from the group consisting of aqueous formaldehyde solution, gaseous formaldehyde, para-formaldehyde, trioxane and mixtures thereof, wherein said condensation product is reacted in the presence of at least one silica-alumina catalyst, said catalyst having a surface area as determined by the BET method carried out according to ASTM D3663-03 (2015) of from 200 m2/g to 520 m2/g, preferably of from 350 m2/g to 495 m2/g, particularly preferably of from 400 m2/g to 490 m2/g, a molar ratio of silica/alumina on the catalyst surface of A, an overall (bulk) molar ratio of silica/alumina of C, and a quotient B=A/C; said catalyst being characterised in that “low” A values (i.e. equal to or lower than 8.0) are combined with “high” B values (i.e. of from 1.50 to 3.00), and “high” A values (i.e. larger than 8.

Abstract: An elastic floor covering (10) in the form of sheets, which can be rolled up, includes a soft core (18) of polyurethane and a layered compound structure (24) disposed on the core (18), and the back of the floor covering (10) is formed by a fiber mat, the fibers of which consist of glass, PET, PP, polyester or renewable raw materials, and which is sealed by a barrier layer on its side facing the core.

Abstract: A chemical mechanical polishing pad for polishing a semiconductor substrate is provided containing a polishing layer that comprises a polyurethane reaction product of a reaction mixture comprising a curative and a polyisocyanate prepolymer having an unreacted isocyanate (NCO) concentration of from 8.3 to 9.8 wt. % and formed from a polyol blend of polypropylene glycol (PPG) and polytetramethylene ether glycol (PTMEG) and containing a hydrophilic portion of polyethylene glycol or ethylene oxide repeat units, a toluene diisocyanate, and one or more isocyanate extenders, wherein the polyurethane reaction product exhibits a wet Shore D hardness of from 10 to 20% less than the Shore D hardness of the dry polyurethane reaction product.

Abstract: The invention relates to the preparation of isocyanates by phosgenation of amines in the gas phase, with these isocyanates having a comparatively low proportion of color-imparting compounds.

Abstract: The invention relates to running bases with improved speed and gliding characteristics when they run over water, snow or ice surfaces or artificial materials that mimic these surfaces. In particular the invention relates to a method comprising sequentially treating at least a portion of the running base with one or more abrasive materials having a progressively smaller particle size.

Abstract: The invention relates to hydrophilic, aliphatic polyurethane foams, which are accessible by reacting hydrophilic polyisocyanates in the presence of water. Due to the absorption properties thereof, the polyurethane foams are in particular suited for producing wound dressings, cosmetic articles or incontinence products.

Abstract: The invention relates to a process for producing polyurethanes by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms which are reactive toward isocyanate groups, wherein the compounds b) having at least two hydrogen atoms which are reactive toward isocyanate groups comprise at least one polyether alcohol b1) which has been prepared by reaction of an aromatic amine b1a) with propylene oxide using an amine b1b) which is different from b1a) as catalyst.

Abstract: Polyester polyols containing adducts formed from Diels-Alder and Ene reactions are disclosed. Processes for making the polyester polyols and uses of the polyester polyols as polyurethane coatings, adhesives, sealants, elastomers, and foams are also disclosed. In some embodiments, the polyester polyols contain biorenewable adducts based on maleic anhydride and farnesene and have particular application in making rigid and flexible polyurethane or polyisocyanurate foams.

Abstract: The present invention relates to predominantly open-cell, cold-deformable, rigid polyurethane foams which possess a uniform cell structure with similar cell sizes and similar physical properties, more particularly a similar open-cell content. These foams are suitable for producing automotive interior trim, more particularly roof linings and pillar trim.

Abstract: A catalyst system which is suitable for catalyzing the production of polyurethane systems is provided. The catalyst system contains a metal salt of a carboxylic acid to whose carbonyl carbon a hydrogen atom or a hydrocarbon radical is bound, with the proviso that the carboxylic acid does not have exclusively a single ethyl or n-propyl branch in the 2 position.

Abstract: Polyurethane foams which are highly flame resistant are described, as well as the production of such polyurethane foams by the reaction between a natural polyol, such as sucrose or a blend of mono- or disaccharides in place of the standard hydrocarbon-based polyol component, a polyisocyanate and water in the presence of a suitable polyurethane forming catalyst and a non-halogenated flame retardant, and optionally one or more components such as surfactants and/or emulsifiers. The resultant polyurethane foam has a bio-based solid content ranging from about 17% to 30%, may be formulated in a variety of foam densities for a variety of applications, and exhibits a high degree of fire and burn resistance, as exhibited by the flame spread index, flash over resistance determination, and the smoke spread values.

Abstract: A process for producing porous aerogels or xerogels includes a reaction of at least one polyfunctional isocyanate with an amine component. The amine component includes at least one polyfunctional substituted aromatic amine. The reaction is in the presence of a solvent and a catalyst. Aerogels and xerogels that can be obtained in this way can be used as insulation material and in vacuum insulation panels.

Abstract: A method of making a hydroxyl terminated precursor for polyurethane is disclosed. The method comprises heating a vegetable oil-polyol mixture of modified vegetable oil containing about two or more hydroxyl groups per molecule and a polyether polyol having about two or more hydroxyl groups per molecule at a temperature of at least about 25 degrees Celsius and at a pressure of about 1 atmosphere. The mixture has a hydroxyl equivalent ratio of about 1:1 vegetable oil to polyol. The method further comprises mixing for at least about 10 minutes an isocyanate containing about two or more isocyanato groups per molecule at least about 25 degrees Celsius to the vegetable oil-polyol mixture at a molar equivalent ratio of at least 2:1 vegetable oil-polyol mixture to isocyanate to react the isocyanate with the mixture to form the hydroxyl terminated precursor.

Abstract: A polyurethane foam having excellent shape-following properties, which exhibits favorable comfort when worn on the human body, both during movement and at rest. The polyurethane foam contains a toluene diisocyanate and a polyether polyol as the main components, has a glass transition temperature, defined as the temperature corresponding with the peak value of the loss tangent, of not less than 0° C. and not more than 40° C., and in the temperature range from not less than 0° C. to not more than 40° C., the loss tangent in the frequency range from not less than 0.1 Hz to not more than 100 Hz is 0.4 or greater, and the average value of the loss tangent in the frequency range from not less than 0.1 Hz to not more than 1 Hz is not greater than the average value of the loss tangent in the frequency range from not less than 10 Hz to not more than 100 Hz.

Abstract: A flexible polyurethane foam comprises the reaction product of an isocyanate component and an isocyanate-reactive component in the presence of a blowing agent. The isocyanate component comprises a polymeric diphenylmethane diisocyanate component and a monomeric diphenylmethane diisocyanate component. The monomeric diphenylmethane diisocyanate component comprises 2,4?-diphenylmethane diisocyanate and 4,4?-diphenylmethane diisocyanate. The flexible polyurethane foam is substantially free of supplemental flame retardant additives and exhibits flame retardance under flammability tests according to California Technical Bulletin 117 regulations.

Abstract: A polyurethane foam is obtainable from the reaction of a mixture comprising A) an isocyanate-reactive compound; B) a blowing agent selected from the group comprising linear, branched or cyclic C1-C6 hydrocarbons, linear, branched or cyclic C1-C6 (hydro)fluorocarbons, N2, O2, argon and/or CO2, wherein said blowing agent B) is in the supercritical or near-critical state; and C) a polyisocyanate. The isocyanate-reactive compound A) comprises a hydrophobic portion and a hydrophilic portion and has an average hydroxyl functionality of more than 1. The hydrophobic portion comprises a saturated or unsaturated hydrocarbonaceous chain having 6 or more carbon atoms and the hydrophilic portion comprises alkylene oxide units and/or ester units. Component A) is very preferably a sorbutan ester of the formula (II): where w+x+y+z=20.

Abstract: The biocompatible, biodegradable materials in the solid and/or liquid form are based on segmented linear polyurethanes and/or segmented crosslinked polyurethanes based on A) one or more biocompatible polyols susceptible to hydrolytic and/or enzymatic degradation having a molecular weight of 100 to 20,000 dalton and a number of active hydroxyl groups per molecule (functionality) of at least two or higher; B) one or more diisocyanates and/or triisocyanates; and C) one or more low molecular weight chain extenders having a molecular weight of 18 to 1000 dalton and the functionality of at least two or higher.

Abstract: The present invention relates to a reaction mixture in emulsion form, suitable for conversion into polyurethanes, comprising a first phase and a second phase in the emulsion and further comprising the following components: A) polyols; B) blowing agent; C) surfactants; and D) isocyanates, wherein the isocyanate-reactive compounds A) are present in the first phase of the emulsion and the blowing agent B) is present in the second phase. The blowing agent B) is present in the near-critical or supercritical state and the isocyanate D) is present in the second phase in a proportion of ?10% by weight of the total amount of isocyanate D) in the composition. The invention further relates to a method of producing polyurethane foams by providing such a reaction mixture, wherein a polymerization takes place at the freshly formed interface between the polyol phase and the blowing agent phase, to the use of such a reaction mixture for producing polyurethane foams and also to the polyurethane foams obtained.

Abstract: The invention relates to a process for preparing polyether alcohols by reacting a) aromatic amines with b) alkylene oxides in the presence of c) a catalyst, wherein the alkylene oxide b) comprises at least 90% by weight, based on the weight of the component b), of propylene oxide and an amine is used as catalyst c).

Abstract: Embodiments of the invention provide for low density flexible polyurethane foams are reaction products of reaction systems including at least one polyol and at least one isocyanate including at least 50% by weight of an MDI based isocyanate. The flexible polyurethane foam has a density of less than about 33 kg/m3 as determined according to ASTM D 3574-01, a tear strength of more than about 160 N/m as determined according to NBR 8515:2003 and a resiliency of at least 45% as measured according to ASTM D-3574-H.

Abstract: Disclosed is a polyurethane resin which is obtained by a reaction between a polyisocyanate component, which contains 1,4-bis(isocyanatomethyl)cyclohexane including not less than 80% by mole of trans isomers, and an active hydrogen compound component.

Abstract: Embodiments of the invention provide for polyurethane flexible foams that do not require a post production crushing step. These “self crushing” flexible foams neither collapse, skin peel, nor form voids upon demolding, and yet maintain excellent physical properties such as uniform cell sizes, high quality surface appearance, compression set, resistance to fatigue, etc.

Abstract: Disclosed is a thermoplastic resin foam which is obtained by subjecting a thermoplastic resin composition containing a thermoplastic elastomer and an active-energy-ray-curable resin to foam molding to give a foamed structure, and irradiating the foamed structure with an active energy ray to allow the active-energy-ray-curable resin to form a cross-linked structure in the foamed structure. Also disclosed is a thermoplastic resin foam which is obtained by subjecting a thermoplastic resin composition containing a thermoplastic elastomer, an active-energy-ray-curable resin, and a thermal cross-linking agent to foam molding to give a foamed structure, irradiating the foamed structure with an active energy ray to allow the active-energy-ray-curable resin to form a cross-linked structure in the foamed structure, and heating the resulting foamed structure bearing the cross-linked structure to thereby allow the thermal cross-linking agent to form another cross-linked structure in the foamed structure.

Abstract: The invention relates to a method for producing hydrophilic, aliphatic polyurethane foams. The invention further relates to special compositions for producing polyurethane foams either using the method according to the invention or using the polyurethane foams obtained from the compositions according to the invention, and to the use of the polyurethane foams as a wound dressing, cosmetic item, or incontinence product.

Abstract: The present invention relates to an improved composition comprising a blend of diisocyanates of Formula (II) derived from their corresponding dianiino alkyl esters obtained from soy protein source, wherein R is an alkyl and n is 1-4, and methods of making and using such compositions as construction material resin binders, in particular, wood resin binders and/or adhesives.

Abstract: Embodiments of the present invention relate to polyurethane foams having high air flow while maintaining viscoelastic properties. In one embodiment, a reaction system for preparation of a viscoelastic polyurethane foam is provided. The reaction system comprises (a) a polyisocyanate component and (b) an isocyanate reactive component. The isocyanate reactive component comprises (i) from 35 to 74% by weight of the isocyanate reactive component of one or more propylene oxide rich (PO-rich) polyols having a combined number average equivalent weight from 200 to 500, (ii) from 24 to 50% by weight of the isocyanate reactive component of one or more ethylene oxide rich (EO-rich) polyols having a combined number average equivalent weight from 200 to 2,800, and (iii)from 2 to 10% by weight of the isocyanate reactive component of one or more butylene oxide rich (BO-rich) polyethers having a number average equivalent weight of 2,000 or more.

Abstract: The invention relates to a process for preparing polyether alcohols, which comprises the steps a) reaction of an unsaturated natural oil or fat with a mixture of carbon monoxide and hydrogen, b) reaction of the mixture from step a) with hydrogen, c) reaction of the product from step b) with an alkylene oxide in the presence of a catalyst.

Abstract: The invention relates to hydrophilic, aliphatic polyurethane foams, which are accessible by reacting hydrophilic polyisocyanates in the presence of water. Due to the absorption properties thereof, the polyurethane foams are in particular suited for producing wound dressings, cosmetic articles or incontinence products.

Abstract: A method of producing a hydrophilic polyurethane foam structure containing a silver salt, chosen from the group of silver sulphate, silver citrate, silver acetate, silver carbonate, silver lactate and silver phosphate, or a mixture of these salts includes the steps of (a) providing a water phase containing a surfactant, and at least one silver salt, wherein the at least one silver salt is dispersed in the water phase; (b) providing a isocyanate-terminated polyether having functionality of more than (2); (c) mixing the water phase and the isocyanate-terminated polyether, immediately transferring the resulting mixture to a mould whereby a foam structure is obtained; and (d) drying the foam structure until it has a moisture content of at most 10% (wt). The hydrophilic polyurethane foam structure produced by the method and a wound dressing containing the foam structure are also described.

Abstract: A crosslinkable foamable composition with low content of monomeric isocyanates comprising a) 10 to 90 wt % of a prepolymer of polyester diols reacted with an excess of diisocyanates and subsequent removal of the excess monomeric diisocyanate, b) 90 to 10 wt % of a component based on polyether polyols which possesses at least one Si(OR)3 group or at least one NCO group, c) 0.1 to 30 wt % additives, d) and at least one blowing agent, wherein the polyester diols and the polyether diols have a molecular mass (MN) below 5000 g/mol and the mixture of a and b comprises a content of monomeric diisocyanates below 2 wt %.

Abstract: A monolith separation medium comprising a skeletal phase and continuous pores forming a three-dimensional network structure, which has a functional group enabling the introduction of a new functional group on the surface of the skeletal phase. The skeletal phase has an average diameter of a submicron to micrometer size and is in a co-continuous structure of the non-particle-aggregation type. It is composed of an addition polymer of 1,3-bis(N,N?-diglycidylaminomethyl)cyclohexane as an epoxy compound with a bifunctional or higher amine compound, is rich in organic matters and is free from any aromatic-origin carbon atom. Thus, it is an organic polymer monolith separation medium of the non-particle-aggregation type.

Abstract: The invention relates to a process for the preparation of a polyurethane polymer, comprising the step of reaction of A) polyester polyols with secondary hydroxyl end groups, which are obtainable from the reaction of a polyester comprising carboxyl end groups with an epoxide of the general formula (1): wherein R1 represents an alkyl radical or an aryl radical and wherein the polyester comprising carboxyl end groups has an acid number of from ?25 mg of KOH/g to ?400 mg of KOH/g and a hydroxyl number of ?5 mg of KOH/g, with B) polyisocyanates which are chosen from the group comprising toluoylene-diisocyanate, diphenylmethane-diisocyanate, polymeric diphenylmethane-diisocyanate, xylylene-diisocyanate, naphthylene-diisocyanate, hexamethylene-diisocyanate, diisocyanatodicyclohexylmethane and/or isophorone-diisocyanate. The invention furthermore relates to polyurethane polymers prepared by such a process.

Abstract: The present invention provides a polyurethane foam for an automobile steering wheel. More particularly, the present invention relates to polyurethane foam formed by using a predetermined amount of a polyol having various functional groups and OH values and a predetermined amount of isocyanate having a certain function, along with water as a foaming agent, thereby preventing the environmental problems caused by use of the conventional fluorine-based or pentane-based foaming agent and also improving durability such as water resistance.

Abstract: The present invention provides compounds produced by the reaction of glycidyl ethers and glycidyl esters with ether compounds including N,N,N?-trimethyl-bis-(aminoethyl) ether. N,N,N?-trimethyl-bis-(aminoethyl) ether and its derivatives can be used as polyurethane catalysts.

Abstract: Process for preparing a composition by reacting a polyisocyanate, a monoalkoxy polyoxyalkylene monoamine and water. The composition and its use in making cellular products are claimed as well.

Abstract: The invention relates to the use of 2,5-diisocyanato-1,4:3,6-dianhydro-2,5-dideoxy-D-manitol (I), 2,5-diisocyanato-1,4:3,6-dianhydro-2,5-dideoxy-D-glucitol (II), and/or 2,5-diisocyanato-1,4:3,6-dianhydro-2,5-dideoxy-L-iditol (III).

Abstract: A method for producing polyisocyanurate insulation foams, the method comprising contacting an A-side stream of reactants that includes an isocyanate with a B-side stream of reactants that include a polyol and a blowing agent, where the blowing agent includes isopentane and n-pentane in a substantial absence of cyclopentane.

Abstract: The invention relates to the use of polyurethane casting compounds for producing light-resistant compact or expanded polyurethane or polyurethane urea bodies that are characterized by exceptionally good mechanical and visual properties and particularly have a very high heat shape retention.

Abstract: The invention relates to a process for producing shaped articles, where a foam layer which includes a polyurethane foam obtained by foaming a composition including an aqueous, anionically hydrophilicized polyurethane dispersion (I), and drying, is thermoformed where the thermoforming takes place at a temperature of from ?100° C. to ?200° C. and under a pressure of from ?50 bar to ?150 bar, and where additionally during the thermoforming the foam is compressed to ?25% to ?100% of its original volume. The foam can be stabilized using ethylene oxide/propylene oxide block copolymers. The invention further relates to shape articles obtainable in this way, and to the use thereof, preferably as wound dressings.

Abstract: A bone defect filler for implantation in a bone defect of a patient includes a particulate polymer distributed within a polymeric binder. The particulate polymer includes a plurality of particles, which may have substantially the same material composition as the polymeric binder. The particles of the particulate polymer may be formed in a variety of shapes and/or sizes to provide the bone defect filler with improved pore interconnectivity, material expansion and contamination characteristics, while maintaining sufficient mechanical strength and handling characteristics for bone repair applications. The bone defect filler also provides the flexibility to be molded or shaped in situ to fill the bone defect.

Abstract: Polyurethane-based pressure-sensitive adhesive wherein the polyurethane comprises the chemical reaction product of at least the following starting materials: a) polyisocyanates comprising at least one aliphatic or alicyclic diisocyanate and at least one aliphatic or alicyclic polyisocyanate having an isocyanate functionality of three or more than three, the amount-of-substance fraction of the aliphatic or alicyclic polyisocyanates having an isocyanate functionality of three or more than three as a proportion of the polyisocyanates being at least 18 per cent, and b) at least one pressure-sensitively adhesive, hydroxyl-functionalized polyurethane prepolymer.

Abstract: Polyurethane composition based on a certain polyether and polyester prepolymer reaction mixture, wherein the composition is utilized in manufacturing chemical mechanical polishing/planarizing (CMP) pads. The CMP pads have low rebound and can dissipate irregular energy as well as stabilize polishing to yield improved uniformity and less dishing of the substrate.

Abstract: Modified open-cell aminoplastic foams with a density in the range from 5 to 1,000 kg/m3 and with an average pore diameter in the range from 1 ?m to 1 mm, comprising an amount in the range from 1 to 2,500% by weight, based on the weight of the un-modified open-cell foam, of at least one water-insoluble polymer (b), selected from polystyrene, styrene copolymers, polybutadiene, butadiene copolymers, polyvinylesters, polyvinylethers, copolymers from (meth)acrylic acid with at least one (meth)acrylate, and polyurethanes with the proviso that styrene-acrylonitrile-C1-C10-alkyl (meth)acrylate terpolymers, styrene-butadiene-n-butyl acrylate terpolymers, and styrene-maleic anhydride copolymers are excluded

Abstract: There are provided aromatic polyester polyol compositions comprising: (i) at least one aromatic acid component; (ii) at least one hydroxylated component; (iii) at least one functionalized natural oil component; and (iv) optionally at least one catalyst component for use in preparing foams. The aromatic polyester polyol compositions can be formed by esterification and/or transesterification. The present technology also provides a polyol blend for use in preparing foams wherein the polyol blend comprises (a) an aromatic polyester polyol formed by an interesterification reaction between (i) a phthalic acid based material; (ii) a hydroxylated material; and (iii) a hydrophobic material, wherein the hydrophobic material is present in an amount of from about 1% to about 50% by weight of the aromatic polyester polyol; and (b) a natural oil based polyol, wherein the hydrophobic material in the aromatic polyester polyol compatibilizes the natural oil based polyol to form a phase stable polyol blend.

Abstract: 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.

Abstract: A method of making an isocyanato terminated precursor for polyurethane is disclosed. The method comprises heating an isocyanate containing about two or more isocyanato groups per molecule at a temperature of up to 80 degrees Celsius and at a pressure of about 1 atmosphere. The method further comprises mixing a modified vegetable oil comprising about two or more hydroxyl groups per molecule with the isocyanate at a molar equivalent ratio of at least 2:1 isocyanate to vegetable oil for a predetermined time period to form the isocyanato terminated precursor.