Abstract: This invention is comprised of a thermoplastic polyurethane elastomer fiber obtained by melt spinning a polyurethane having a rebound of 60% or greater and a isocyanate-terminated polyether or polyester additive. The elastic fibers have low shrinkage, high heat resistance, low tensile set, and high elongation.

Abstract: Melt spun thermoplastic polyurethane polymers useful as textile fibers and having good tenacity and recovery and substantially no gelation are disclosed. The polymers are prepared by a three-step polymerization process including: preparation of “hard” segment oligomer, preparation of “soft” segment oligomer and final reaction of “hard” segment with “soft” segment in a twin-screw reaction extruder to obtain a final polyurethane product having relatively uniform distances between the “hard” segments. The “soft” segment oligomer comprises blocks of polymeric glycol (poly) urethanes end capped with isocyanate groups. The “hard” segment oligomer comprises blocks of low molecular weight C2-C6 glycol (poly) urethanes.

Abstract: The present invention provides a coating composition containing 1) a carbamate-functional resin having in its structure a hyperbranched or star polyol core, a first chain extension based on a polycarboxylic acid or anbydride, a second chain extension based on an epoxy containing compound, and having carbamate functional groups on the core, the second chain extension, or both; and 2) a second resin containing functional groups reactive with the carbamate groups on the carbamate-functional resin. In one embodiment, the coating compositions are used as a cloarcoat to be applied over a basecoat to form a composite coating. The compositions exhibit a combination of desirable properties, such as scratch and mar resistance, resistance to environmental etch, good intercoat adhesion, and high solids.

Abstract: Monofunctional polyfluorooxetane oligomers and polymers are prepared by the cationic polymerization of fluorooxetane monomers with a monoalcohol. The fluorooxetane oligomers or polymers can be copolymerized with generally cyclic ethers. Alternatively, the polyfluorooxetane oligomer or polymer having a single hydroxyl end group can be functionalized with a variety of compounds so as to yield a functional end group such as an acrylate, a methacrylate, an allylic, an amine, etc., with the functionalized oligomer or polymer being suitable for use in radiation curable or thermal curable coating compositions. These functionalized polymers can be copolymerized and cured to provide improvements in wetting and surface properties that have previously been provided by migratory chemicals such as waxes and oils.

Abstract: Low density microcellular polyurethane foams suitable for athletic shoe midsoles and other applications are prepared by diol chain extension of 12 to 16% free NCO isocyanate-terminated prepolymers prepared by reacting an excess of di- or polyisocyanate with one or more high molecular weight, high functionality polyoxypropylene diols preferably employing water as a reactive blowing agent. The microcellular elastomers exhibit increased hardness despite the higher molecular weight of the polyoxypropylene diol and further exhibit greater tear resistance, lower compression set, and markedly lower shrinkage.

Abstract: A golf ball comprising a center, a cover, and optionally, at least one intermediate layer disposed between the center and the cover, wherein at least one of the center, the cover, and the at least one intermediate layer is formed with a polyurethane composition comprising a reaction product of a prepolymer of at least one polyol and at least one polyisocyanate, and at least one curing agent. A polyurethane composition, suitable for forming golf equipment, said composition comprising a reaction product of a prepolymer of at least one polyol and at least one polyisocyanate, and at least one curing agent.

Abstract: Thermally reversible light scattering materials are provided in accordance with the invention including a low melting, polymeric material dispersed in a polymer matrix; a first polymer which upon heating from a temperature below its melting point to a temperature above its melting point changes from a light scattering solid to a liquid, the first polymer being dispersed in a matrix provided by a second polymer to form a light scattering polymer material when cold and a less or non-light scattering material when hot; and thermally reversible light scattering materials which go from light scattering at lower temperatures to less or non-light scattering at higher temperatures.

Abstract: Radiation-curable compositions are disclosed which, after cure, are substantially non-yellowing. The compositions are particularly tailored for coating and bundling of optical fibers. A first preferred composition is based on a polyether-type of oligomer diluted with reactive diluents. Isocyanurate structures are included in the composition to raise Tg. A second preferred composition is based on fatty oil comprising (meth)acrylate groups and bisphenol A derivatives comprising (meth)acrylate groups. Photoinitiators can be included to increase cure speed. The formulations do not include material amounts of ingredients which tend to cause yellowing or, in theory, extended conjugation in the cured compositions.

Abstract: A process for producing poromeric synthetic leather comprises I. producing an essentially nonporous impregnate by impregnating a textile sheet material with an aqueous polyurethane dispersion and drying, and II. producing a poromeric synthetic leather from the impregnate by subjecting the impregnate to the action of an aqueous solution of a Brønsted base.

Abstract: A method of preparing a carbamate functional polymer or oligomer is provided. The method comprises: (a) preparing a reaction mixture comprising a lower alkyl carbamate, a hydroxyl functional polymer or oligomer, and an alcohol different from and having a higher boiling point than an alcohol from which the lower alkyl carbamate is derived; and (b) heating the reaction mixture to form a carbamate functional polymer or oligomer. Also provided is a method of preparing a carbamate functional acrylic polymer by preparing a similar reaction mixture using acrylic monomers containing hydroxyl groups or groups that can be converted to hydroxyl groups and heating the reaction mixture in the presence of a free radical initiator and an esterification catalyst.

Abstract: The present invention relates to functionalizable and crosslinkable polyurethanes formed of a polyurethane intermediate including one or more ester groups which react with an amine equivalent to form an amide unit. The polyurethane intermediate comprises the reaction product of alkyl ester of dihydroxypolyacid or dimethylolalkanoic acid, a polyoxyalkylene diol and an organic diisocyanate. The polyurethane is reacted with a solution of an amine equivalent and a solvent or an amine. An article of manufacture can be formed from the polyurethane.

Abstract: A thermoplastic molding composition comprising a thermoplastic polyurethane and an olefinic copolymer is disclosed. The polyurethane component contains ether structural units and units derived from an aliphatic isocyanate. The molecular structure of the copolymer contains units derived from monomers containing olefinic unsaturation. The composition is characterized in the compatibility of its resinous components and in the improved mechanical properties.

Abstract: The present invention relates to a mixture of ethylenically unsaturated polyurethanes containingI) 5 to 95% by weight, based on the weight of components I) and II), of ethylenically unsaturated polyurethanes which are substantially free from isocyanate groups and have a) a content of .beta.,.gamma.-ethylenically unsaturated ether groups (calculated as C.dbd.C, MW 24) incorporated through allophanate groups of 0.5 to 10% by weight, b) an allophanate group content (calculated as N.sub.2 C.sub.2 HO.sub.3, MW 101) of 1 to 20% by weight and c) a total content of ethylenically unsaturated groups of (calculated as C.dbd.

Abstract: Disclosed are bio-active coating compositions for polymeric substrates. In particular, a bio-active coating is described which is the reaction product formed by providing a polymer backbone with at least one free isocyanate group, wherein the isocyanate group is pendant from the polymer backbone. There is further provided a hydrophilic, amine-terminated spacer which has at least one amine group at its first and second ends. One of the amine groups of the spacer is reacted with one or more of the isocyanate groups on the polymer backbone in the presence of an optional catalyst agent. A bio-active agent is then covalently bonded onto an unreacted end of the spacer in the presence of a catalyst. Also disclosed are coating compositions for a substrate and methods of preparing same.

Abstract: Clearcoat compositions using a phenolic ester compound are described. The phenolic ester compound is selected from the group consisting of a phenolic ester alcohol, a phenolic urethane, a phenolic blocked isocyanate, and mixtures thereof.

Abstract: The present invention is directed to a polymeric vehicle, the formulated coating composition and a coating binder made from the polymeric vehicle and a method for making the polymeric vehicle where the polymeric vehicle includes a phenol blocked isocyanate having reactive aliphatic hydroxyl groups. The phenol blocked isocyanate may be made from a phenolic ester alcohol having at least one aliphatic hydroxyl group and one phenolic hydroxyl group.

Abstract: Reactive hotmelt adhesives based on liquid polyether polyols and/or polyester polyols and aromatic diols with at least one diisocyanate have a very low melt viscosity and high early strength. They are particularly suitable for the bonding of substrates of poor thermal conductivity, such as foams and nonwoven materials, and heat-sensitive substrates.

Abstract: An electrodepositable composition that has: (A) an active hydrogen-containing cationic resin, electrodepositable on a cathode, having: (1) a polyepoxide; (2) an oxygen-substituted diamine compound having the following formula: ##STR1## where n is an integer from 2 to 4; and where R.sup.1 or R.sup.2 are the same or different and either one or both contain at least one oxygen and are alkyl, cycloalkyl, substituted alkyl, or substituted cycloalkyl having from 1 to 6 carbon atoms, or R.sup.1 and R.sup.2 are alkanol groups having from 2 to 6 carbon atoms, or R.sup.1, R.sup.2, and the N atom form a cyclic group which is substituted or unsubstituted such as morpholine and 1-(3-aminopropyl) imidazole; and (B) at least partially blocked isocyanate or polyisocyanate curing agent. The diamine compound of Formula I can be used alone or in conjunction with one or more secondary amines, nonhydroxy group containing amines and/or amines with ring structures.

Abstract: A polyester-polycarbonate composition comprising (A) at least one polyester prepared by the reaction of at least one alkenediol with at least one dicarboxylic acid or dialkyl ester thereof in the presence of a metallic catalyst, (B) at least one polycarbonate, (C) at least one silyl phosphate, the silyl phosphate being present in an amount effective to inhibit ester-carbonate interchange in the composition, optionally, (D) an organic or inorganic colorant, particularly, acid sensitive organic or inorganic colorants, (E) an impact modifier, and (F) a stabilizer. A method for stabilizing polyester-polycarbonate compositions against ester-carbonate interchange is also provided.

Abstract: A power coating and a substrate coated with the coating are provided, wherein the coating contains a mixture ofA) a pulverulent polyisocyanate component which is a solid at temperatures of less than 50.degree. C. and a liquid at temperatures above 160.degree. C., of the formula I ##STR1## where R, R.sup.1 and n are as described herein, and B) a pulverulent, organic polyhydroxy component which is a solid at temperatures of less than 50.degree. C. and a liquid at temperatures above 160.degree. C. and having a ratio of secondary to primary OH groups of at least 3.1,wherein components A and B are present in a ratio of equivalents of NCO:OH groups of from 0.5:1 to 1.3:1,and wherein component B is selected from the group consisting of bisphenol A-containing epoxy resin, oligoamides containing secondary hydroxyl groups, and mixtures thereof.

Abstract: A system for protecting surfaces and facilitating the removal of unwanted substances therefrom is disclosed, the system including a polymeric coating having a low volatile organics content (VOC) which is safe for the environment, and a cleaner for application to the coating to remove material from the coating, such as graffiti. The coating may be either a water-based epoxy comprising a bisphenol A resin and polyamide resin, or an aliphatic urethane comprising a polymer having reactive sites which react with a isocyanate and an aliphatic isocyanate. The cleaner is suitable for removing all manner of epoxy and urethane based spray paints, indelible inks, industrial chemicals, and the like. The cleaner comprises N-methyl pyrrolidone in a concentration of fifty percent by weight or greater and a surfactant.

Abstract: A waterproof and, at the same time, breathable and antistatic film produced without a support by extrusion, the film having a DIN friction coefficient of less than 0.8 and consisting of thermoplastic polyurethane elastomer resins with a melt flow rate, as measured at 190.degree. C. under a load of 10 kg, of at most 70, the soft segment of the elastomer resins consisting of polyethylene oxide and/or containing ethylene oxide reaction products and the relative percentage by weight of the soft segment in the polyurethane resin being between 35% by weight and 60% by weight, based on the total weight of the polyurethane used.

Abstract: Disclosed are bio-active coating compositions for polymeric substrates. In particular, a bio-active coating is described which is the reaction product formed by providing a polymer backbone with at least one free isocyanate group, wherein the isocyanate group is pendant from the polymer backbone. There is further provided a hydrophilic, amine-terminated spacer which has at least one amine group at its first and second ends. One of the amine groups of the spacer is reacted with one or more of the isocyanate groups on the polymer backbone in the presence of an optional catalyst agent. A bio-active agent is then covalently bonded onto an unreacted end of the spacer in the presence of a catalyst. Also disclosed are coating compositions for a substrate and methods of preparing same.

Abstract: A polyisocyanate prepolymer composition which comprises the reaction product of a) diphenylmethane diisocyanate composition and b) an active hydrogen containing compound having a number average molecular weight of at least about 2000 wherein the reaction is carried out in the presence of a diluent capable of maintaining the average viscosity of the resulting prepolymer below about 500 cps at 25.degree. C. The prepolymer may be reacted with a resin composition to prepare soft elastomers.

Abstract: Cured, thermoset plastic articles derived from scrap polyurethanes are disclosed. The polyurethane is converted to a liquified mixture containing digested polyurethane and cyclic, unsaturated anhydride. A Lewis acid then catalyzes insertion of the cyclic, unsaturated anhydride into the polyether backbone of the polyurethane to give a liquid, unsaturated resin. The unsaturated resin can cured with a vinyl monomer in the presence of a free-radical initiator to give a cured, thermoset plastic.

Abstract: Thermoplastic molding materials containA) from 10 to 99.5% by weight of a thermoplastic polymer selected from the group consisting of the polyoxymethylenes, polyolefins, polyesters, polycarbonates, polystyrene, ABS, ASA, SAN, polyamides or poly(meth)acrylates or mixtures thereof,B) from 0.5 to 80% by weight of a thermoplastic polyurethane having a melting point of <200.degree. C.,C) from 0 to 50% by weight of a fibrous or particulate filler or a mixture thereof andD) from 0 to 30% by weight of conventional additives and processing assistants,the percentages by weight of the components A) to D) summing to 100%.

Abstract: The invention relates to a coating composition intended to be applied to a surface of a high-molecular-weight elastic body. The coating composition includes 100 parts by weight of a mixture of a polyisocyanate and a compound containing therein at least two active hydrogen atoms which are capable of reacting with the polyisocyanate to prepare a polyurethane, and 0.5-100 parts by weight of a diorganopolysiloxane having an average degree of polymerization from 6,000 to 10,000. The coating composition provides a coating film which is superior in durability. Furthermore, this coating film does not generate an uncomfortable noise even when a glass plate wet with water slides on the coating film.

Abstract: The present invention relates to waterproof but breathable flat materials prepared from the melt from polymer resin mixtures consisting of at least two different melt processable polyurethanes, wherein the different thermoplastic polyurethanes have soft segments with different chemical constitutions, wherein the thermoplastic polyurethane which forms the matrix is a polyurethane with a ether based soft segment, wherein the ether segment has a carbon/oxygen atomic ratio of at least two and at most three and is present at a rate of 70-95 wt. % with reference to the total weight of thermoplastic polyurethanes used for melt processing to produce a flat material, and wherein the flat materials according to the invention have a higher permeability to water vapour, determined according to DIN 53 122, and a lower water absorption, determined according to DIN 53 495, method C, than flat materials made from one of the polyurethanes used for the polymer resin mixture.

Abstract: Polyurethane polymers having pendant carbamate groups are disclosed. The polymers are prepared by:(a) reacting a mixture comprising a polyol having at least one pendant carbamate group and a polyisocyanate to form a polyurethane having pendant carbamate groups, and(b) optionally, capping the polyurethane from (b) with an active hydrogen-containing capping agent.

Abstract: An electrodepositable composition that has: (A) an active hydrogen-containing cationic resin, electrodepositable on a cathode, having: (1) a polyepoxide; (2) an oxygen-substituted diamine compound having the following formula: ##STR1## where n is an integer from 2 to 4; and where R.sup.1 or R.sup.2 are the same or different and either one or both contain at least one oxygen and are alkyl, cycloalkyl, substituted alkyl, or substituted cycloalkyl having from 1 to 6 carbon atoms, or R.sup.1 and R.sup.2 are alkanol groups having from 2 to 6 carbon atoms, or R.sup.1, R.sup.2, and the N atom form a cyclic group which is substituted or unsubstituted such as morpholine and 1-(3-aminopropyl) imidazole; and (B) at least partially blocked isocyanate or polyisocyanate curing agent. The diamine compound of Formula I can be used alone or in conjunction with one or more secondary amines, nonhydroxy group containing amines and/or amines with ring structures.

Abstract: A TDI residue generated from the phosgenation of toluene diamine having an ortho-isomer content of less than 0.5% is used to produce a urethane-filled hydroxyl compound. The TDI residues useful in this invention must contain at least 10% monomeric TDI and have a total NCO content of at least 20%. These TDI residues are reacted with a monofunctional alcohol in an amount such that the equivalent ratio of isocyanate groups to hydroxyl groups is from about 0.9:1 to about 1:0.9. The resultant composition may then be dissolved in a polyhydroxyl compound to produce a urethane-filled polyhydroxyl compound. This urethane-filled polyhydroxyl compound may then be reacted with a polyisocyanate to produce a polyurethane.

Abstract: Urethane-filled, polyether polyols are prepared by reacting (1) a hexamethylene diisocyanate residue from the phosgenation of hexamethylene diamine with contains less than 10% by weight monomeric hexamethylene diisocyanate and has a total isocyanate group content of at least 25% with (2) an alcohol containing at least four ether linkages in amounts such that the equivalent ratio of isocyanate groups in (1) to hydroxyl groups in (2) is from about 0.9:1.0 to about 1.0:0.9 and subsequently dissolving this reaction product in a polyether polyol.

Abstract: To form multi-layer paint films which have a good finished appearance on objects which are to be painted, using an aqueous base coat composition. An aqueous base coat composition which contains aqueous polyurethane resin and rheology control agent, the electrical conductivity measured in an aqueous solution of 3% by weight concentration of which is 700-900 mS/cm, is painted and then the paint film is formed, a transparent top coat is painted on the base coat paint film obtained in this way, and the base coat and the top coat are baked at the same time.

Abstract: A biocompatible, hydrophilic, segmented block polyurethane copolymer which comprises 5 to 45 wt % of a hard segment and 95 to 55 wt % of a soft segment selected from a hydrophilic, hydrophobic and amphipathic oligomer is disclosed. The copolymer is capable of forming a non-porous, semi-permeable film of a tensile strength greater than 300 and up to 10,000 psi, and has an ultimate elongation greater than 300% and up to 1,500% and a water absorption such that the sum of the volume fraction of absorbed water and the hydrophilic volume fraction of the soft segment exceeds about 100% and is up to about 2,000% of the dry polymer volume. The film is permeable to cell nutrients and waste molecules of up to about 6,000 to 600,000 molecular weight and is substantially impermeable to cells and particulate matter. A non-porous, semi-permeable, biocompatible film is formed from the block copolymer of the invention in the form of a flexible sheet or a hollow fiber.

Abstract: Urethane-filled compositions are produced by reacting a dicyclohexylmethane diisocyanate residue or a dicyclohexylmethane diisocyanate residue containing mixture with a monofunctional alcohol containing at least one ether group in an amount such that the equivalent ratio isocyanate groups to hydroxyl groups is from about 0.9:1 to about 1:0.9. The diisocyanate residue or residue-containing mixture must contain at least 20% by weight monomeric diisocyanate and have a total NCO content of at least 10%. The diisocyanate residue is produced by phosgenating dicyclohexylmethane diamine in which less than 20% polymeric diamine is present. The urethane filled compositions produced in this manner may then be dissolved in either a polyol or a polyisocyanate and subsequently used to produce polyurethanes in known manner.

Abstract: TDI residue-based urethane-filled isocyanate compositions are produced by reacting a TDI residue satisfying specified criteria with a monofunctional alcohol in amounts such that the equivalent ratio of isocyanate groups to hydroxyl groups is from about 0.9:1 to about 1:0.9. This reaction product is then dissolved in a diisocyanate or polyisocyanate. These TDI residue-based urethane-filled isocyanate compositions are particularly useful in the production of polyurethanes.

Abstract: A room temperature curing polyurethane composition comprises a polyisocyanate compound or polyurethane prepolymer (A), an oxazolidine compound (B) having at least one oxazolidine ring, a compound (C) for accelerating the opening of the oxazolidine ring, and optionally a modified carbodiimide (D). The inventive polyurethane composition excels in storage stability and freedom of foaming when curing.

Abstract: A bio-active coating composition is described which is the reaction product of two different reactions. The first reaction includes reacting a bio-compatible polymer backbone having .alpha.,.beta.-unsaturated carbonyl functionality with a hydrophilic spacer having at least one reactive functional group at its first and second ends. In this reaction, one of the reactive functional groups of the spacer reacts with a .beta.-carbon of the carbonyl functionality to bond the spacer to the polymer backbone. The second reaction includes reacting a bio-active agent with a remaining unreacted reactive functional group of the spacer in the presence of an optional catalyst to covalently bind the bio-active agent to the spacer.

Abstract: The invention relates to a process for adjusting the viscosity of highly concentrated elastane solutions by reaction of the solution with secondary aromatic amines in order to produce spinning solutions for the dry or wet spinning of elastane fibres.

Abstract: The present invention provides a cationic electrodepositable coating composition comprising:?I! a polyurethane-modified epoxy resin-amine adduct obtained by a reaction of:(A) a polyurethane compound having one terminal isocyanate group in the molecule, obtained by a reaction of (a) a polyhydroxy compound having a number-average molecular weight of 50-8,000, (b) a polyisocyanate compound, and (c) a compound having one active hydrogen atom in the molecule,(B) a bisphenol type epoxy resin having at least two epoxy groups in the molecule, and(C) an active-hydrogen-containing amine compound, and ?II! a nonionic film-forming resin.

Abstract: A hydrophilic tetramethylxylylenecarbodiimide represented by the following formula (1): ##STR1## wherein n is an average polymerization degree and is an integer of 1 to 30; R.sub.1 is a residue of an organic compound having a hydrophilic segment and at least one functional group reactive with an isocyanate group; and X is a group formed by the reaction of the functional group with the isocyanate group. The carbodiimide is free from the problems of the prior art, has good storage stability and accordingly is usable as an easy-to-handle crosslinking agent for hydrophilic resin.

Abstract: Coating compositions are disclosed which use a polyoxetane polymer having CH.sub.2 --O---CH.sub.2 --R.sub.f side chains where R.sub.f is a highly fluorinated alkyl or polyether. The coating compositions use polyisocyanates to create isocyanate terminated polymers from the poly(oxetanes) and from various polyols from alkylene oxides or polyester polyols. These can be reacted together to form block copolymer structures or can be linked together when the coating is crosslinked. A preferred method is to use blocked isocyanate groups. Another preferred embodiment is to use the composition as a abrasion resistant coating for glass run channels.

Abstract: A self-emulsifiable polyisocyanate mixture which is of a non-yellowing type, is not deteriorated in weather resistance, has a high hardness and is quick-drying and which is obtained from a specific, NCO-terminated modified HDI and has introduced thereinto a specific, NCO-terminated modified IPDI or a specific, NCO-terminated modified TDI, and an aqueous coating or adhesive composition comprising the above self-emulsifiable polyisocyanate mixture.

Abstract: A self-emulsifiable polyisocyanate mixture having a hexamethylene diisocyanate monomer content of not more than 1.0% by weight and an average NCO functionality of 2.0 to 3.7 obtained by subjecting hexamethylene diisocyanate to urethanation with a branched dihydric alcohol having overall 4 to 35 carbon atoms, of which 2 to 33 carbon atoms are a total number of the carbon atoms possessed by one or more branches, a hydrophilic surfactant having one or more active hydrogen atoms capable of reacting with NCO group and 3 to 90 alkylene oxide units, an aliphatic compound having one or more active hydrogen atoms capable of reacting with NCO group and 8 or more carbon atoms and an unbranched glycol having 1 to 10 carbon atoms; uretdione-forming reaction; and isocyanurate-forming reaction.

Abstract: An optical sensor is provided for measuring dissolved gases such as O.sub.2 or CO.sub.2 in a fluid sample. The sensor is formulated so as to contain a gas permeable membrane of a cured perfluorinated urethane polymer and, incorporated therein, a gas-sensitive indicator component. Methods for making and using the membrane and sensor are provided as well.

Abstract: A dispersion or solution of a free radical polymer, polycondensate or polyadduct, which consist of from 0.001 to 20% by weight of aldehyde groups --CHO or keto groups --CO--, contains, as a crosslinking agent, a compound having at least two H.sub.2 N--O---groups or oxime ether groups derived therefrom.

Abstract: Polyisocyanate compositions are provided which comprise the reaction product of a diphenylmethane diisocyanate composition comprising 25 to 70% by weight of 2,4'-diphenylmethane diisocyanate and an isocyanate-reactive polyoxyethylene polyoxypropylene polyahl having an ethylene oxide content of at least 30% by weight, a number average hydroxyl equivalent weight of 700-2000 and an average nominal hydroxyl functionality of 2-6, the reaction product having a free NCO content of 2-31% by weight.

Abstract: A process for preparation of a polyurethane-polycarbodiimide foam which comprises reacting a polyol component containing a benzylic ether type phenol resin having hydroxymethyl groups with an organic polyisocyanate component in the presence of an organotin catalyst for urethane formation and a carbodiimidating catalyt. According to this process, it is unnecessary to use fluorine-containing halogenated hydrocarbons as a blowing agent, and blowing on the spot is possible using a spray blowing machine or the like.

Abstract: The invention relates to a process for adjusting the viscosity of highly concentrated elastane solutions by reaction of the solution with secondary aromatic amines in order to produce spinning solutions for the dry or wet spinning of elastane fibers.

Abstract: The present invention relates to novel polymeric compositions of matter and their use. Said polymeric compositions of matter are surface active endgroup-containing polymers that comprise a linear base polymer having covalently bonded surface active endgroups of a nature and present in an amount such that said polymers have a surface or interfacial tension that differs by at least 1 dyne/cm from the surface or interfacial tension of an otherwise identical polymer that does not contain said covalently bonded surface active endgroups. The novel linear polymers according to the present invention are particularly suitable for use in the manufacture of medical devices, and especially of medical devices intended to be used in contact with bodily fluids such as blood. Examples of such medical devices include catheters and artificial hearts.