Abstract: A method of forming a polyol includes the steps of reacting an initiator with an alkylene oxide, and optionally carbon dioxide, in the presence of a double metal cyanide catalyst and a sterically hindered chain transfer agent capable of protonating the growing polyol polymer. The presence of the chain transfer agent reduces the polydispersity of the resultant polyol.

Abstract: Polyols initiated with a first initiator having a relatively high functionality averaging greater than eight and comprising a range of species of different functionality, and optionally a second initiator, having low functionality, i.e. a two to eight nominal functionality initiator molecule. Another aspect of the invention is a process for making the polyol. The invention is also directed to a process for producing polyurethane foam by reacting the polyol of the invention with isocyanates, and the foam produced thereby.

Abstract: A method for the production of polyurethane products using very low unsaturation polyether polyols prepared in the presence of aluminum phosphonate catalysts is disclosed. Reaction products of the process include various polyurethane products including foams, coatings, adhesives, sealants and elastomers. The aluminum phosphonate catalyst preferably has a general structure of RPO-(OAlR′R″)2, wherein O represents oxygen, P represents pentavalent phosphorous, Al represents aluminum, R comprises a hydrogen, an alkyl group, or an aryl group, and R′ and R″ independently comprise a halide, an alkyl group, an alkoxy group, an aryl group, or an aryloxy group.

Abstract: The invention relates to an oil pan module (21) for internal combustion engines (1) and to a process for making such a part by injection molding. The oil pan module (21) is fastened to the housing (2) of the internal combustion engine (1) and holds the lubricating oil supply (7). Integrated with oil pan module (21) are parts (8, 9, 12) of the oil circulation system. Oil pan module (21) consists of a polyamide-based thermoplastic material reinforced with glass fibers and/or mineral matter.

Abstract: The invention provides composite components constructed of a layer i) comprising short fiber reinforced PU and having a paintable surface, and a layer ii) comprising long fiber reinforced polyurethane, and also provides a process for producing them, and provides for their use as exterior bodywork parts.

Abstract: Polyurethane foams are prepared by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms reactive with isocyanate groups, by a process in which the polyisocyanates a) are aliphatic di- or polyisocyanates and the compounds having at least two hydrogen atoms reactive with isocyanate groups b) contain at least one acrylate polyol.

Abstract: A process for preparing multimetal cyanide compounds by reacting a metal salt with a cyanometalate compound comprises the steps a) precipitation of the multimetal cyanide compound by reaction of a metal salt with a cyanometalate compound and b) recrystallization of the multimetal cyanide compound precipitated in step a).

Abstract: Polyetherpolyols are prepared by reacting diols or polyols with ethylene oxide, propylene oxide, butylene oxide or a mixture thereof in the presence of a multimetal cyanide complex catalyst by a process which is carried out in a vertical upright cylindrical reactor comprising a jet nozzle which is arranged in the upper reactor region and is directed downward and via which the starting materials and the reaction mixture are fed in, and comprising a take-off, preferably in the lower reactor region, via which the reaction mixture is fed back to the jet nozzle in an external circulation by means of a pump via an equilibration container, comprising a concentric guide tube which extends over the total length of the reactor, except for the reactor ends, and comprising a heat exchanger integrated in the annular space.

Abstract: A process for working up distillation residues from the synthesis of tolylene diisocyanate by reaction of the distillation residues with water comprises reacting the TDI distillation residues with water in a continuous or semicontinuous process in a backmixed reactor in the presence of hydrolysate.

Abstract: A process for the preparation of polyetherpolyols by reacting diols or polyols with ethylene oxide, propylene oxide, butylene oxide or a mixture thereof in the presence of a multimetal cyanide complex catalyst is proposed, the reaction being carried out in a stirred kettle reactor and the reaction mixture being circulated via an external heat exchanger by means of a pump.

Abstract: Highly resilient polyurethane foams are prepared by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms reactive with isocyanate groups, by a process in which a mixture containing, based in each case on the weight of the mixture, b1) from 5 to 75% by weight of at least one polymer polyol and b2) from 25 to 95% by weight of a mixture containing, based in each case on the weight of the mixture b2), b2i) from 70 to 98% by weight of at least one polyether alcohol having a molecular weight of from 3 500 to 6 500 g/mol, a functionality of less than or equal to 3 and an ethylene oxide content of from 8 to 20% by weight, based on the weight of the polyether alcohol, and b2ii) from 2 to 30% by weight of at least one polyether alcohol having a molecular weight of from greater than 4 000 to 7 000 g/mol, a functionality of from 4 to 8 and an ethylene oxide content of from 5 to 15% by weight, based on the weight of the polyether alcohol, is used as compounds b) having two hydrogen atom

Abstract: In a process for preparing polyether alcohols by catalytic addition of at least two alkylene oxides onto H-functional initiator substances, at least one multimetal cyanide compound is used as catalyst and the addition of the alkylene oxides onto the initiator substance includes incorporation of at least one oxyalkylene block during whose formation at least two alkylene oxides are metered in together and the ratio of the alkylene oxides to one another in the mixture is changed during the joint introduction.

Abstract: The aromatic polyurethane elastomers of the present invention are particularly suited for methods of making objects in a mold cavity. The objects generally include an elastomeric layer formed from an aromatic polyurethane and a foam layer which is subsequently applied to the elastomer. The aromatic elastomer of the present invention lends itself to being precoated with an in-mold coating or being painted after demolding the resulting part.

Abstract: A method is disclosed for preparing compression molded or pressed lignocellulosic articles. The method involves forming a binder resin by combining a polyisocyanate component with a synergist component of a C1 to C4 N-alkyl pyrrolidone, gamma-butyrolactone, or mixtures thereof. A resinated lignocellulosic mixture is formed by combining the binder resin with lignocellulosic particles having a moisture content of from 2 to 15 weight percent. The compression molded or pressed lignocellulosic article is formed by compressing the resinated lignocellulosic mixture.

Abstract: An anti-lumping agent for use with expandable polystyrene beads is disclosed. The expandable polystyrene beads comprise a styrene or styrene derivative polymer in combination with a blowing agent. Typical blowing agents are C3-C6 hydrocarbons, with pentane being especially preferred. The anti-lumping agents include block copolymers formed from blocks of ethylene oxide and propylene oxide. Preferably, the copolymers have a number average molecular weight of from about 4,000 to 15,000, and a hydrophilic-lipophilic balance number of from about 16 to 29. The anti-lumping agents significantly reduce the lumping potential of the expandable polystyrene beads, especially when they are expanded to low densities of from about 1.5 to 0.75 lbs. per cubic foot, and more preferably to densities of from about 1.2 to 0.85.

Abstract: Reticulated flexible polyurethane foams are prepared by reacting organic and/or modified organic polyisocyanates (a) with a polyetherol mixture (b) and, if required, further compounds (c) having hydrogen atoms reactive toward isocyanates, in the presence of water and/or other blowing agents (d), catalysts (e) and further assistants and additives (f), by a process in which the polyetherol mixture (b) comprises b1) at least one difunctional or polyfunctional polyetherol having an OH number of from 20 to 150 mg KOH/g, based on propylene oxide and/or butylene oxide and ethylene oxide and having an ethylene oxide content of more than 40% by weight, based on the total amount of alkylene oxide used, (b1.

Abstract: A method for preparing compression molded or pressed lignocellulosic articles is disclosed. The method involves forming a binder resin by combining a polyisocyanate component with a parting agent and preferably a synergist. The parting agent is the reaction product of an isocyanate compound and an isocyanate-reactive compound of the general structure R—(ao)n—Y where: R is a hydrophobic group containing alkyl, alkaryl, polyaryl, or siloxane moieties; (ao) is an alkylene oxide or mixture of alkylene oxides; n is from 1 to 25; and Y represents a monofunctional isocyanate-reactive group. A resinated lignocellulosic mixture is formed by combining the binder resin with lignocellulosic particles. Then a compression molded or pressed lignocellulosic article is formed by compressing the resinated lignocellulosic mixture at an elevated temperature and under pressure.

Abstract: Polyfunctional polyisocyanate polyadducts are prepared by a process comprising (i) preparation of an adduct by reacting (a) an at least trifunctional component (a1) reactive with isocyanate groups or a difunctional component (a2) reactive with isocyanate groups or a mixture of the components (a1) and (a2) with (b) a di- or polyisocyanate, the reaction ratio being chosen so that on average the polyadduct (A) contains one isocyanate group and more than one group reactive with isocyanate groups, (ii) if required, intermolecular addition reaction of the adduct (A) to give a polyadduct (P) which contains on average one isocyanate group and more than two groups reactive with isocyanate groups, and (iii) reaction of the adduct (A) or of the polyadduct (P) with an at least difunctional component (c) reactive with isocyanate groups.

Abstract: A composite structure including a polyurea show surface, or top layer, and a polyurethane backing layer is disclosed. Preferably, the show surface of the composite structure is substantially free of volatile organic compounds and is aliphatic such that it is ultraviolet light stable. Specifically, the show surface is the reaction product of an aliphatic polyisocyanate or aliphatic polyisocyanate blend, and of a resin component which is a polyamine. The resin component reacts with the aliphatic polyisocyanate to form a polyurea. The show surface has a Shore D hardness of 70. Like the show surface, the polyurethane backing layer of the composite structure is substantially free of volatile organic compounds. This backing layer is the reaction product of a second polyisocyanate component, such as polymeric diphenylmethane diisocyanate, and of a second-layer resin component, which comprises a polyol having a functionality of at least three.

Abstract: In multimetal cyanide complexes, more than 30% by weight of the primary particles have a platelet-like habit, i.e. the length and width of the primary particles is at least three times the thickness of the particles.