Abstract: The present invention relates to a process for the preparation of plastics containing thermoplastic polyurethanes and optionally other components comprising (a) melting and homogenizing a thermoplastic polyurethane in an extruder, and (b) adding an isocyanate to said extruder containing the melted and homogenized thermoplastic polyurethane.

Abstract: A blend of isocyanate-terminated polyurethane prepolymers comprising: (a) a first prepolymer which comprises the reaction product of an at least essentially semicrystalline hydroxy-functional material and a polyisocyanate; (b) a second prepolymer which comprises the reaction product of a poly(tetramethylene glycol) ether and a polyisocyanate; and (c) a third prepolymer which comprises the reaction product of an essentially amorphous hydroxy-functional material and a polyisocyanate. The blend may also include a fourth prepolymer which comprises the reaction product of a slightly branched hydroxy-functional material and a polyisocyanate.

Abstract: Adhesive formulations are blends of aqueous polymer dispersions and a hydrophobic plasticizer. The blended dispersed polymers include at least one hard sulfonated polyester urethane, at least one soft non-sulfonated polyester urethane, and at least one polar non-polyurethane water-based polymer or copolymer. A high molecular weight elastomeric non-sulfonated polyurethane polymer and a crosslinker are optional further components in the blend. The formulations are useful as non-heat activating, one-component adhesives which generate excellent green strength, water and heat resistant bonds.

Abstract: Thermoplastic urethane elastomeric alloys are obtained by melt compounding at least one first component that is a polyurethane elastomer having at least one plasticizer reacted therein, this first component being formed by heating a reaction mixture comprising at least one isocyanate having a functionality of less than about 2.2, at least one long chain polyol, at least one chain extender and at least one plasticizer in specified amounts at a temperature of at least about 330.degree. F. (165.6.degree. C.), with at least one second component that is another thermoplastic elastomer not within the definition of the first component.

Abstract: A method for preparing a polyamide-imide-modified polyurethane varnish composition for coating a conductive wire to form a varnished wire. The method comprises the steps of: (a) preparing a first intermediate reaction product, which is an isocyanate compound, (b) preparing a second intermediate reaction product, which is a hydroxy compound, and (c) mixing the first and second intermediate reaction products with a diluent to form the polyamide-imide-modified polyurethane varnish composition. The first intermediate reaction comprises the steps of: (I) preparing a first reaction mixture containing a phenol or a derivative of phenol, a diisocyanate, and a dihydroxy compound in a first organic solvent, and reacting the first reaction mixture at room temperature; (ii) adding a diacid compound or trimellitic anhydride or mixture thereof to the first reaction mixture, and reacting at 100.degree..about.140.degree. C.

Abstract: This invention is a quaternary ammonium/isocyanate compound having the formulaOCN--Z--Q.sup.+ A.sup.-,whereinZ is a divalent organic moiety;Q is a quaternary ammonium moiety; andA is a monovalent anionic counterion. Use of this quaternary ammonium/isocyanate compound or its amine/isocyanate compound enables one to convert any hydroxy containing binder into a self-wetting binder.

Abstract: Distortion control additives are disclosed which comprise a polyisocyanate, a polyol or polyol blend having a hydroxyl functionality of 2 to 3 hydroxyl groups per molecule and an average molecular weight of at least about 500 grams per gram mole, a diol chain extender having from about 2 to 35 carbon atoms per molecule and an acrylate or methacrylate having an acrylate functionality of from 1 to 5 acrylate groups per molecule. Ultraviolet-curable liquid compositions comprising an unsaturated polymeric resin, a monomer and the distortion control additives of the present invention are also disclosed. The distortion control additives can provide substantial reductions in distortion, e.g., shrinkage, of objects produced by ultraviolet curing, e.g., stereolithography.

Abstract: This invention relates to new water-emulsifiable polyester resins, a process for their production and their use as a lacquer row material. These lacquer binders are produced by the reaction of at least one prepolymer A which contains (meth)acryloyl groups and at least one unsaturated water-emulsifiable polyester B with at least one polyisocynate C.

Abstract: The present invention relates to a process for the preparation of plastics containing thermoplastic polyurethanes and optionally other components comprising (a) melting and homogenizing a thermoplastic polyurethane in an extruder, and (b) adding an isocyanate to said extruder containing the melted and homogenized thermoplastic polyurethane.

Abstract: An isocyanate-based elastomer containing a filler material, the filler material being present at a level in the range of from about 30% to about 90% by weight of the elastomer and having a specific gravity of less than about 2.0. A process for producing the isocyanate-based elastomer is also disclosed. The process comprises the steps of: providing a first mixture comprising a catalyst and a filler material, the filler material being wetted by the catalyst; providing a second mixture comprising an isocyanate and an active hydrogen-containing compound; mixing the first mixture and the second mixture to provide a reaction mixture; allowing the reaction mixture to react to produce the isocyanate-based elastomer.

Abstract: A blend of isocyanate-terminated polyurethane prepolymers comprising: (a) a first prepolymer which comprises the reaction product of an at least essentially semicrystalline hydroxy-functional material and a polyisocyanate; (b) a second prepolymer which comprises the reaction product of a poly(tetramethylene glycol)ether and a polyisocyanate; and (c) a third prepolymer which comprises the reaction product of an essentially amorphous hydroxy-functional material and a polyisocyanate. The blend may also include a fourth prepolymer which comprises the reaction product of a slightly branched hydroxy-functional material and a polyisocyanate.

Abstract: A waterborne coating composition containing an aqueous dispersion of a polymer, the polymer being substantially free from hydroxyl, primary amino, and secondary amino groups and the polymer bearing at least two active methylene groups, and an aqueous dispersion of a polyisocyanate bearing at least two isocyanate groups is provided. Also provided is a method of improving the chemical resistance of a coating and a substrate coated with the waterborne coating composition.

Abstract: The invention relates to a cathodic electro-dipping process wherein the electro-dipping primer employed contains a crosslinking agent which can be obtained by(I) reacting, in a first stage,(a) diphenylmethane diisocyanate and(b) a monoalcohol or a mixture of monoalcohols to give an intermediate product (A) containing isocyanate groups, and(II) reacting this intermediate product (A) in a second stage with(c) a polyol or a mixture of polyols to give an intermediate product (B) containing hydroxyl groups which(III) is reacted in a third stage either with(d) a cycloaliphatic, aliphatic or araliphatic polyisocyanate or a mixture of such polyisocyanates and(e) a monofunctional masking agent or a mixture of such masking agents or with(f) a partially-masked polyisocyanate prepared from (d) and (e)to give a crosslinking agent which is free from isocyanate groups.

Abstract: A release agent comprising a resin containing siloxane segments is described. The resin has been modified with a silane coupling agent containing at least one free isocyanate group and contains one or more hydrolyzable silyl groups in side chains of its molecule.

Abstract: A coating composition is described comprising two components that are reactable with each other to cure the coating. The two components are:(a) a carboxyl-functional polyurethane component that is the reaction product of:(i) a polyisocyanate compound, and(ii) a compound comprising at least one acid group and at least one isocyanate-reactive group,(b) a component comprising at least two groups that are reactive with the epoxy groups on the polyurethane compound.

Abstract: A moisture-curable urethane-based sealing composition is made up of an urethane prepolymer and a polyurethane compound blended together in specified amounts. The urethane prepolymer is derivable by reacting a selected class of polyether polyols with a selected class of polyisocyanate compounds. The polyurethane compound is available by reacting a selected class of polyether or polyester polyols with a selected class of polyisocyanate compounds, followed by reaction of the resulting prepolymer with a selected class of monoalcohols to thereby binder all isocyanate groups in the prepolymer. The ultimate sealant is adequate in initial adhesion strength, low in glass transition temperature and resistant to moist heat.

Abstract: Stable, non-gelled, one-package coating compositions capable of being cured at ambient conditions to produce durable coatings comprising at least one polymer and/or oligomer having a molecular weight of at least about 100 and bearing at least two specific aziridine moieties, at least two specific carbodiimide moieties or combinations thereof and at least one polymer and/or oligomer having a molecular weight of at least about 100 and bearing at least two covalently blocked carboxylic acid moieties. Process for coating a substrate using such compositions are also claimed.

Abstract: Method for treating surface of dielectric polymer with water vapor plasma to form reactive sites and grafting a reactive polymer thereto to tailor the properties of the dielectric polymer surface.

Abstract: A reactive, after cooling still viscous-plastic moldable hot-melt adhesive contains a mixture ofat least one thermoplastic material,at least one binder on isocyanate basis, andat least one thixotropic agent,and the isocyanate content, referred to the total of the hot-melt adhesive, is in the range from 0.01 to 10 percent by weight.

Abstract: The present invention provides an adhesive composition comprising a polyurethane resin and, as adhesion promoter, a compound of formula I: ##STR1## in which Z is an organic radical which is derived from an aliphatic aromatic or heterocyclic polyisocyanate containing m+n isocyanate groups; m is a value greater than or equal to 1; n is a value greater than or equal to 0; m+n is a value greater than or equal to 2; Y is 0 or S; X is 0, S or N--C.sub.1 -C.sub.4 alkyl; R.sub.1 is C.sub.1 -C.sub.8 alkylene; R.sub.2 is C.sub.1 -C.sub.4 alkyl or two groups R.sub.2 together for m a C.sub.1 -C.sub.4 alkylene residue; R.sub.3 is C.sub.1 -C.sub.4 alkyl or phenyl; and q is a value from 0 to 2.

Abstract: Compounds containing alcoholic hydroxyl groups suitable as a starting material for the isocyanate polyaddition process by the alcoholysis of polyisocyanate polyaddition products are produced. Polyurethane urea or polyurea waste products having a molar ratio of urea groups to urethane groups of from 1:20 to 1:0 are heated in size reduced form to temperatures of from 120.degree. to 250.degree. C. together with B) polyhyhdric alcohols in the molecular weight range of from 62 to 250 in a ratio by weight of A:B of from 3:1 to 1:10. At least 10% of the polyhydric alcohol B put into the process is subsequently removed by distillation under reduced pressure. A total of up to 1000% by weight, based on the weight of polyurethane urea or polyurea waste A, of one or more polyhydroxy compounds having a molecular weight above 250 which is (are) not volatile under the distillation conditions may optionally be added to the mixture before and/or after removal of the excess alcohol B by distillation.

Abstract: The present invention deals with low temperature impact resistant, easily flowing, thermoplastic polyurethane elastomer compositions, comprising:A) 5-95 parts by weight of at least one thermoplastic polyurethane elastomer (A) having a Shore A hardness less hah 95; andB) 95-5 parts by weight of at least one thermoplastic polyurethane elastomer (B) having a Shore A hardness greater than 98, whereby the parts by weight of (A) and (B) total 100 parts by weight; andC) 0-60 weight percent based on the weight of (A) and (B) of a reinforcing filler.The products are prepared by melting together polyurethane elastomers (A) and (B) at temperatures of from 140.degree.-250.degree. C., preferably in an extruder, and are most preferred for the preparation of ski boots and injection molded articles for motor vehicles.

Abstract: A second order nonlinear optically-active azo monomer comprising a benzimidazole moiety. The monomers can be incorporated into both linear and crosslinked polymers useful in electrooptical devices.

Abstract: The present invention is directed to a hydrophilic composition which is the reaction product of a polyvinylpyrrolidone, an organic monoisocyanate, and an oxyalkylene group containing mono- or di- hydroxyl compound.

Abstract: A photopolymerizable rubber being obtained by copolymerizing four compounds consisting of a dienic liquid rubber having hydroxyl groups, an ethylenically unsaturated monomer having hydroxyl groups, a dihydric alcohol having a molecular weight of less than 2,000 and a diisocyanate compound. The photocured product of this composition has higher tensile strength and elongation than that of the prior photopolymerizable rubbers.

Abstract: A thermoplastic polyurethane chain extended with an alkylenediol is blended with a thermoplastic polyurethane chain extended with an oxyalkylene qlycol oligomer. The blend is extruded into a catheter tubing having sufficient initial stiffness for satisfactory insertion in a patient and a high degree of softening for safe positioning and long term catheterization procedures without the risk of vessel wall perforation.

Abstract: This invention is directed to a polyurethane mixture. More particularly, there is provided a mixture polyurethanes comprising a first polyurethane with at least two end groups, where each end group comprises a terminal isocyanate and a polyether; a second polyurethane with at least two end groups, where each end group comprises a terminal isocyanate group and a non-functional group; and a third polyurethane with at least two end groups, where one end group comprises a terminal isocyanate and a polyether and one other end group comprises a terminal isocyanate and a non-functional group. A method for improving the sag resistance of an aqueous composition is also provided. This method permits the formulation of aqueous compositions which resist the tendency to sag. The polyurethane mixture of this invention is useful for thickening aqueous compositions such as paints, coatings, cosmetics, personal care items, hair shampoos and conditioners, cleaners, and the like.

Abstract: Monocomponent thermoplastic adhesives that are spontaneously cross-linkable by moisture and modified tackifier resins and other modified components for use therein that are obtained by reacting the same with an excess of polyisocyanate, and more specifically with MDI. The thermoplastic adhesives formulated with these modified resins have good resistance to creep at temperatures as high as 160.degree. C.

Abstract: Thermoplastic synthetic polymeric compositions of certain polyurethanes, polyamides or chlorinated polyolefins, having processing temperatures in the range of about 150.degree. to 325.degree. F., can be modified by the addition of a millable thermoplastic polyurethane elastomer thereto to lower the processing temperature by 10.degree. to 30.degree. F. or more. This modification enables the thermoplastic composition to be processed on conventional calendering or extrusion equipment with a lesser amount of energy or with better performance. Also, coated fabrics of such thermoplastic compositions and a fiber reinforcement.

Abstract: Novel modified polymeric materials are provided. The polymeric materials according to the invention are prepared by grafting a fluorine-containing compound onto a polyurethane polymeric substrate. The polymeric materials show superior blood compatibility in the in vitro and ex vivo tests, attributing to hydrophobic property, inertness and water-repelling property intrinsic to the grafted fluorine containing compounds.The polymeric materials according to the invention are useful as the materials for the artificial, circulatory, internal organ systems to be contacted with blood, such as artificial hearts, artificial blood vessels, artificial heart valves, artificial blood oxygenators, and artificial kidneys, or for the medical devices/instruments to be inserted into the blood vessels, such as vein catheters, artery catheters and intra-aortic balloon pumps.

Abstract: Disclosed herein are polyurethane compositions specifically adapted to produce non-porous membranes exhibiting waterproof and water vapor transmissible characteristics. The membranes can be produced as free standing products or can be produced as coatings on porous substrates to confer similar properties to such substrates. Also disclosed are coated fabrics and fabric laminates utilizing the membranous coatings of the invention and exhibiting waterproof and water vapor transmissible characteristics. Such coated fabrics and fabric laminates find utility in the fabrication of tenting, rainwear and other garments where waterproofness, coupled with breathability, are important features.

Abstract: Disclosed herein are polyurethane compositions specifically adapted to produce non-porous membranes exhibiting waterproof and water vapor transmissible characteristics. The membranes can be produced as free standing products or can be produced as coatings on porous substrates to confer similar properties to such substrates. Also disclosed are coated fabrics and fabric laminates utilizing the membranous coatings of the invention and exhibiting waterproof and water vapor transmissible characteristics. Such coated fabrics and fabric laminates find utility in the fabrication of tenting, rainwear and other garments where waterproofness, coupled with breathability, are important features.

Abstract: A one component composition suitable for coating a substrate, including at least one crosslinker having a functionality thereon that is reactive with a functionality on at least one film forming polymer. The crosslinker includes at least one member selected from the group consisting of: blocked isocyanurates of isophorone diisocyanate; derivatives of blocked isocyanurates of isophorone diisocyanate; blocked biurets of isophorone diisocyanate; derivatives of blocked biurets of isophorone diisocyanate. The composition preferably includes a blend of this crosslinker with a second crosslinker, wherein the second crosslinker is at least one member selected from the group consisting of: blocked isocyanurates of hexamethylene diisocyanate; derivatives of blocked isocyanurates of hexamethylene diisocyanate; blocked biurets of hexamethylene diisocyanate; and derivatives of blocked biurets of hexamethylene diisocyanate.

Abstract: A two-part polyurethane adhesive which comprises a main component comprising a hydroxyl-terminated saturated polyester resin or a polyester urethane rubber prepared by reacting said hydroxyl-terminated saturated polyester resin with a diisocyanate compound, and a curing agent comprising a urethane prepolymer having an active isocyanate group which is prepared by reacting a hydrogenated hydroxyl-terminated polybutadiene with an excess amount of a polyisocyanate. Said polyurethane adhesive is useful for adhering a polyolefin base material and a covering material for the production of automobile interior parts.

Abstract: Novel sulfonated polyethyleneoxide-substituted polymers having improved blood compatibility are provided. The polymers are produced by substituting a polymeric substrate having active sites of amide or acid amide group, such as polyurethane, polyamide and polyacrylamide, with sulfonated polyethyleneoxide [PEO--(SO.sub.3 H).sub.n ].The polymers according to the present invention are valuable as construction materials of the artificial organs for the circulatory system in contact with blood, such as artificial hearts, artificial blood vessels, artificial kidneys, etc.

Abstract: There is disclosed a resin composition comprising a product produced by the reaction of (a) a prepolymer prepared by reacting a diisocyanate with a hydroxy fatty acid ester or a mixture of a hydroxy fatty acid ester and a polyether polyol, with (b) at least one member selected from the group consisting of aromatic polyamines, polyether polyamines and polyether polyimines or a mixture of such a member as above and a polyether polyol. The resin composition is useful as an internal release agent for resins for reaction injection molding.

Abstract: The present invention relates to a two-component, aqueous polyurethane coating composition which may be cured at ambient temperature and which containsI) an isocyanate-reactive component containingA) aqueously dispersed polyurethane wherein the polyurethane hasa) an average hydroxy functionality of at least 1.8,b) a total content of urethane andurea groups, calculated as --NH--CO--, of 9 to 20% by weight, based on the weight of the polyurethane,c) sufficient chemically incorporated anionic groups andd) ethylene oxide units incorporated within terminal and/or lateral polyether chainsto maintain the polyurethane stably dispersed in water, andB) 5 to 20%, based on the weight of components I and II, of a polyol which has a molecular weight of 62 to 1000 and may contain ether groups andII) a water dispersible polyisocyanate havinga) an isocyanate content of 2 to 30% by weight, based on the weight of the polyisocyanate,b) an average functionality of at least 1.

Abstract: A non-isocyanate flexibilizer additive is provided which finds utility in coating systems such as alkyds, polyesters, acrylic/polyester, alkyd/acrylic, carboxy/epoxy, polyether/urethane, epoxy/polyester, other epoxy, and urea and melamine formaldehyde systems. The non-isocyanate functional flexibilizer has the formula; B--C(O)--NW--A--NX--C(O)--K wherein A is selected from the group consisting fundamentally of polyesters, polyamides, polyureas, polyurethanes, acrylics; biuret, allophonate and urethane extended polyesters; wherein B and K are selected from the group consisting of --OR and --Z--R'--SiOR".sub.(3-n) R"".sub.n wherein R' is a divalent lower alkyl radical of from 1 to 18 carbon atoms, R is a lower alkyl radical of from 1 to 18 carbon atoms, Z is a member selected from the group consisting of S and NR", W and X are selected from H and lower alkyl radicals of from 1 to 10 carbon atoms, wherein R", R" and R"" are H or a lower alkyl radical of from 1-18 carbon atoms, and wherein n is 0, 1 or 2.

Abstract: A moisture-curing hot-melt adhesive comprises (A) a urethane prepolymer comprising hard and soft segment moieties and having an isocyanate group at the terminus which is prepared by reacting stepwise a polyol having a molecular weight of 1,000 to 8,000 and a thermoplastic saturated polyester polyol having a molecular weight of 1,000 to 6,000, a melting point of 50.degree. C. or higher and a glass transition temperature of 10.degree. C. or higher with an diisocyanate compound in a overall NCO/OH ratio of 1.6 to 3.0, and (B) a urethane prepolymer comprising a soft segment moiety and having an isocyanate group at the terminus which is prepared by reacting a polyol having a molecular weight of not more than 8,000 with a diisocyanate compound in an NCO/OH ratio of 1.6 to 3.0, said component (A) and component (B) being mixed in a ratio of 10:90 to 90:10 by weight.

Abstract: The present invention is directed to a polyurethane reactive adhesive compound comprising:A) one or more polyisocyanates having an inactivated particle surface,B) at least one isocyanate reactive compound having a molecular weight MG.sub.w greater than 400, andC) finely dispersed polymer particles, wherein the polymer is solid at temperatures below 70.degree. C. and has a molecular weight MG.sub.w of at least 3000.

Abstract: A coating composition for use in a mold coat coating process wherein the coating composition is previously coated on the molding surface of a mold for polyurethane resin, prior to molding of the polyurethane resin in which the coating composition is transferred onto the surface of the molded polyurethane resin. The coating composition is comprised of a principal component including a resin constituent whose principal ingredient is addition polymer of isophorone diisocyanate and polycarbonate polyol in a content ranging from 8 to 25% by weight of the principal component, and a hardener component including a resin constituent whose principal ingredient is addition polymer of hexamethylene diisocyanate and isophorone diisocyanate in a content ranging from 5 to 100% by weight of the hardener component, thereby improving pot life and weatherability of coating film of the coating composition while contributing shortening of so-called open time in a molding cycle.

Abstract: A method for adding ester side groups, e.g. liquid crystalline groups, to a polymer backbone using tin chemistry. ##STR1## The method is particularly useful for adding side groups to a polymer that contains thermally sensitive groups, such as epoxy groups, as the reaction can be carried out at relatively low temperatures.Claims are to(a) a method of adding side units to a polymer;(b) a polymer containing the side units - SnBu.sub.3 ;(c) specific polymers.

Abstract: High molecular weight thermoplastic polyurethane resins with narrow molecular weight distribution and good physical properties are prepared by regenerating thermally degraded and/or off-grade thermoplastic polyurethane resins. The regenerated high molecular weight thermoplastic polyurethane resins do not present any processing difficulties inherent to high molecular weight resins.

Abstract: This invention, therefore, relates to the field of polyurethane coatings for use in automobile basecoat/clearcoat systems. In particular, this invention relates to water-dispersible polyurethane resins having polyether sidechains which may be utilized in basecoat compositions as principal resins or grind resins. These polyurethane resins may be laterally stabilized or terminally stabilized. The terminally stabilized resins of this invention are preferably employed as principal resins in basecoat compositions.

Abstract: A chemical formulation useful as a coating, primer or adhesive including a linear polyester polyurethane, a halogenated polyolefin, a phenolic resin, and a cross-linker. The formulation is preferably utilized as a two-component adhesive for bonding polymer blend-based thermoplastic elastomers to various substrates such as metal.

Abstract: The invention relates to a process for the production of highly concentrated and, surprisingly, viscosity-stable solutions of segmented polyurethane urea elastomers in highly polar solvents, such as dimethyl formamide and dimethyl acetamide, having little or no tendency to turn to paste, characterized by the use of certain primary and secondary cycloaliphatic monoamines or cycloaliphatic monisocyanates as chain-extending agents/blocking agents in the reaction of NCO prepolymers based on relatively high molecular weight dihydroxy compounds and (preferably aromatic) diisocyanates with aliphatic and and/or cycloaliphatic diamine chain-extending agents. The chain terminators according to the invention also show unexpected iprovements in the color of the elastomer solution and also in the stability of the end products, preferably filaments, to light and noxious gases.

Abstract: Quick-setting hot-melt adhesive compositions comprising a mixture of at least two polyurethane prepolymer, each providing a different glass transition point to said composition. Preferably one prepolymer has a tg above room temperature and one prepolymer has a tg below room temperature. These adhesive mixtures show an attractive blend of properties, giving quick setting bonds which are flexible immediately after bonding and which after curing have excellent heat stability and resistance to hydrolytic and chemical attack.

Abstract: The invention relates to trans-cyclohexane-1,4-diisocyanate which is completely or partially blocked with epsilon-caprolactam and a method of manufacturing the same wherein 1 mole trans-cyclohexane-1,4-diisocyanate is reacted with 1 to 2 moles epsilon-coprolactam, without or with the presence of solvents. These blocked diisocyanates are used for polyurethane powders.

Abstract: High green strength curable urethane adhesive compositions of a polyol, an organic isocyanate compound, a thermoplastic polyurethane which is soluble in methyl ethyl ketone to at least 1 weight percent for imparting tack and green strength properties to the composition, and, optionally, a solvent for controlling the percent solids and viscosity of the composition.

Abstract: One-component polyurethane systems contain reaction products prepared in situ from(A) monoamines and/or polyamines and/or polymeric substances having one or more amino groups and(B) mono- and/or polyisocyanates and/or polymeric substances having one or more isocyanate groupsas viscosity-regulating substances.