Abstract: The present invention is directed to a process for preparing water-blown rigid polyurethane foams having at least an 80% closed-cell content which involves reacting a) at least one polyol mixture which is composed of (i) at least one polymer polyol; (ii) at least one polyol having a hydroxyl value within the range of from about 200 to about 800; and (iii) optionally, at least one polyol having a hydroxyl value within the range of from about 25 to about 115; with b) at least one polymeric isocyanate and/or a prepolymer thereof; in the presence of c) optionally, at least one catalyst; d) water; and e) optionally, at least one additive or auxiliary agent. The present invention is also directed to the closed-cell water blown rigid polyurethane foams produced by the process of the present invention. The invention is further directed to a polyurethane-foam forming mixture which is used to produce the water-blown rigid polyurethane foams of the present invention.

Abstract: This invention relates to freeze-stable aromatic diisocyanates, an to processes for the preparation of these freeze-stable aromatic diisocyanates. The preferred aromatic diisocyanate is preferably diphenylmethane diisocyanate. These freeze-stable aromatic diisocyanates comprise a blend of an aromatic diisocyanate, with 2,2,4-trimethyl-1,3-pentanediol diisobutyrate, and have an NCO group content of from about 6% to about 29% by weight. Suitable aromatic diisocyanates contain one or more of the following modifying groups: allophanate groups, carbodiimide groups, uretonimine groups, biuret groups, dimer groups, isocyanurate groups, urea groups and/or urethane groups. Prepolymers of these modified aromatic diisocyanates are also suitable for the present invention.

Abstract: The present invention is directed to a process for preparing water-blown rigid polyurethane foams having at least an 80% closed-cell content which involves reacting a) at least one polyol mixture which is composed of (i) at least one polymer polyol; (ii) at least one polyol having a hydroxyl value within the range of from about 200 to about 800; and (iii) optionally, at least one polyol having a hydroxyl value within the range of from about 25 to about 115; with b) at least one polymeric isocyanate and/or a prepolymer thereof; in the presence of c) optionally, at least one catalyst; d) water; and e) optionally, at least one additive or auxiliary agent. The present invention is also directed to the closed-cell water blown rigid polyurethane foams produced by the process of the present invention. The invention is further directed to a polyurethane-foam forming mixture which is used to produce the water-blown rigid polyurethane foams of the present invention.

Abstract: Energy absorbing flexible foams can be produced by reacting an isocyanate with a first polyol, prepared at least in part by an active double metal cyanide catalyst and a second polyether polyol is prepared at least in part by a basic or acidic catalyst.

Abstract: The present invention is directed to a process for preparing water-blown rigid polyurethane foams having at least an 80% closed-cell content which involves reacting a) at least one polyol mixture which is composed of (i) at least one polymer polyol; (ii) at least one polyol having a hydroxyl value within the range of from about 200 to about 800; and (iii) optionally, at least one polyol having a hydroxyl value within the range of from about 25 to about 115; with b) at least one polymeric isocyanate and/or a prepolymer thereof; in the presence of c) optionally, at least one catalyst; d) water; and e) optionally, at least one additive or auxiliary agent. The present invention is also directed to the closed-cell water blown rigid polyurethane foams produced by the process of the present invention. The invention is further directed to a polyurethane-foam forming mixture which is used to produce the water-blown rigid polyurethane foams of the present invention.

Abstract: Energy absorbing flexible foams can be produced by reacting an isocyanate with a first polyol, prepared at least in part by an active double metal cyanide catalyst and a second polyether polyol is prepared at least in part by a basic or acidic catalyst.

Abstract: The present invention is directed to a process for preparing water-blown rigid polyurethane foams having at least an 80% closed-cell content which involves reacting a) at least one polyol mixture which is composed of (i) at least one polymer polyol; (ii) at least one polyol having a hydroxyl value within the range of from about 200 to about 800; and (iii) optionally, at least one polyol having a hydroxyl value within the range of from about 25 to about 115; with b) at least one polymeric isocyanate and/or a prepolymer thereof; in the presence of c) optionally, at least one catalyst; d) water; and e) optionally, at least one additive or auxiliary agent. The present invention is also directed to the closed-cell water blown rigid polyurethane foams produced by the process of the present invention. The invention is further directed to a polyurethane-foam forming mixture which is used to produce the water-blown rigid polyurethane foams of the present invention.

Abstract: A method for making an energy-absorbing foam having a density that is less than about 7 pcf that exhibits excellent strength properties and that is particularly suitable for automobile bumper applications. The invention is also directed to the energy-absorbing foam made with the method.

Abstract: This invention relates to a process for the preparation of a flexible foam. This process comprising reacting a liquid, storage stable, allophanate-modified polyisocyanate having an NCO group content of about 20 to about 42%, with an isocyanate-reactive component, in the presence of a blowing agent and at least one catalyst, wherein the relative amounts of the polyisocyanate and the isocyanate-reactive component are such that the NCO index if from about 70 to about 130.

Abstract: A method for making an energy-absorbing foam with polyurethane fillers that produces an energy-absorbing foam with properties that are comparable to a foam made without fillers.

Abstract: Increases in reactivity of acidic containing RIM systems are reduced by inclusion of a catalyst system of a zinc-containing compound, a non-zinc containing metal compound and a tertiary amine.

Abstract: The present invention is directed to a rigid, molded foam produced by reacting: a) one or more organic polyisocyanates, with b) a polyol blend comprising i) 100 parts by weight of a mixture comprising: 1) from 30 to 80 parts by weight of one or more polyethers having hydroxy functionalities of 2 or 3 and molecular weights of from about 1,000 to about 8,000, the polyethers further being characterized as containing no nitrogen atoms and not being filled polyethers, 2) from 10 to 50 parts by weight of one or more adducts of toluene diamine and an alkylene oxide, the adduct having a molecular weight of from about 350 to about 700, 3) from 0 to 15 parts by weight of one or more di- or trialkanol amines, with the amounts of components 1), 2) and 3) totaling 100 parts, and c) from about 0.1 to about 4 parts by weight per 100 parts by weight of component b) of a silicone cell-opening surfactant and d) from 1 to 7 parts by weight of water, and e) from 0.

Abstract: This invention relates to a process for preparing optionally reinforced rigid polyurethanes by the reaction, under resin transfer molding conditions at an isocyanate index of 90 to 130, of(a) an organic polyisocyanate, with(b) 15 to 80 percent by weight, based on the total of components (b), (c), and (d), of certain polyester polyols having long-chain fatty acid or fatty alcohol groups, a number average molecular weight of 500 to 3000, and a metal ion content below 100 ppm; and(c) 20 to 85 percent by weight, based on the total of components (b), (c), (d) and (e), of one or more crosslinkers, other than component (b), containing 3 to 8 hydroxyl groups and having a molecular weight of 92 to 1000 and a metal ion content below 100 ppm,(d) 0 to 60 percent by weight, based on the total of components (b), (c), and (d), of an isocyanate-reactive compound, other than a polyester polyol of component (b), having a metal ion content below 100 ppm, selected from (i) an isocyanate-reactive polyol containing 3 to 6 hydroxyl

Abstract: The present invention is directed to an isocyanate reactive mixture comprising from about 17 to about 85% by weight of one or more non-filled polyether polyols having a hydroxyl functionality of from 1.5 to 3 and molecular weights of from 1,500 to 8,000; from about 12 to about 80% by weight of one or more non-tertiary amine containing polyether polyols having a hydroxyl functionality of from 3 to 8 and a molecular weight of from 150 to 1,000; from about 0 to about 4% by weight of one or more primary or secondary diamines or amino alcohols and from 3 to about 12% by weight of water. The invention is also directed to a water-blown, energy absorbing foams made from the isocyanate reactive mixture.

Abstract: This invention relates to a process for the production of polyurethane/urea elastomers from a reaction injection molding process of a reaction mixture on the presence of a catalyst via the one-shot process. The isocyanate component of this invention is a prepolymer based on a cycloaliphatic diisocyanate, and having an NCO content of 12-27%, an average isocyanate functionality of less than 2.3, a monomer content of greater than about 25% by weight, and containing urethane or urea groups. The isocyanate-reactive blend comprises a high molecular weight polyether polyol and a low molecular weight chain extender wherein the equivalent ratio of hydroxyl groups to amine groups of the chain extender is from 1:2 to 20:1. This invention also relates to the polyurethane/urea molded article produced by the above process.

Abstract: The present invention is directed to a heat resistant product prepared by reacting a) a mixture of i) an organic polyisocyanate, ii) an epoxide group containing compound, and iii), optionally, an organic compound containing an active methylene group and containing at least one electron withdrawing group adjacent to the methylene carbon, and b) at least one polyol which is free of any tertiary amine groups, with the reaction being conducted at an NCO:OH equivalent ratio of from 2:1 to 5:1. The reaction is conducted in the presence of a tertiary amine-free isocyanurate catalyst selected from the group consisting of oxides, alkoxides, hydroxides and carboxylates of alkali metals, alkaline earth metals, transition metals and quaternary ammonium.

Abstract: This invention relates to a process for the production of polyurethane/urea moldings from a reaction injection molding process by processing the reaction mixture consisting of a diisocyanate and an isocyanate-reactive component via the one-shot process at an isocyanate index of about 80 to 130. The diisocyanate is an unmodified cycloaliphatic diisocyanate. The isocyanate-reactive component consists of 1) at least one polyol having functional groups which are hydroxyl groups, amine groups, or mixtures of hydroxyl groups and amine groups such that the equivalent ratio of hydroxyl groups to amine groups is from 0:1 to 1:1, and 2) at least one chain extender which is selected from diols, triols, primary aliphatic amines, secondary aliphatic amines, aminoalcohols and mixtures thereof. The equivalent ratio of hydroxyl groups to amine groups in the chain extender component is from 1:2 to 10:1.

Abstract: This invention relates to a process for the production of polyurethane/urea moldings which exhibit both high flexural modulus and high impact strength. The process comprises reaction injection molding of a reaction mixture in the presence of a catalyst via the one-shot process. The isocyanate component of this invention is a prepolymer of methylenebis(cyclohexyl isocyanate) having an NCO content of 12-27%, an average isocyanate functionality of less than 2.3, a monomer content of greater than about 25% by weight, and containing urethane or urea groups. The isocyanate-reactive blend comprises a high molecular weight polyether polyol and a low molecular weight chain extender, wherein the isocyanate-reactive blend has an OH:NH equivalent ratio of from 1:1 to 15:1. This invention also relates to the polyurethane/urea molded article produced by the above process.

Abstract: The present invention is directed to polyurethane moldings produced via the RIM process. These polyurethane moldings have excellent reactivity, demold properties (at a 30s demold), and good elongation and tear strength, and comprise the reaction product of an HDI prepolymer having an NCO content of 5 to 25%, a functionality of less than 2.3, and a monomer content of less than 10%, with an isocyanate-reactive component comprising b1) at least one relatively high molecular weight organic compound containing at least about two isocyanate-reactive hydroxyl groups; b2) at least one relatively low molecular weight organic compound selected from the group consisting of diols, aminoalcohols, and mixtures thereof; and b3) at least one relatively low molecular weight hydroxyl-based crosslinking compound containing no more than one aliphatic amine hydrogen atoms capable of reacting with isocyanate groups; in the presence of at least one catalyst.

Abstract: The present invention is directed to polyurethane moldings produced via the RIM process. These polyurethane moldings have excellent reactivity, demold properties (at a 30 s demold), and good elongation and tear strength, and comprise the reaction product of an aliphatic polyisocyanate having a viscosity of less than about 20,000 mPa.multidot.s at 25.degree. C. and a NCO functionality of 2.3 to 4.0 with an isocyanatereactive component comprising b1) a relatively high molecular weight organic compound containing at least one of the groups selected from the group consisting of hydroxy groups and amine groups; and b2) a low molecular weight chain extender selected from the group consisting of diols, triols, primary amines, secondary amines, aminoalcohols, and mixtures thereof; in the presence of a catalyst. The OH:NH ratio of the chain extender is from 1:1 to 25:1.