Abstract: Compatibilizing agent being the reaction product of an organic mono- or polyfunctional isocyanate and a compound corresponding to the following general formula (I) ##STR1## wherein Y.sub.1 and Y.sub.2 (same or different) represent O or S; n and n' (same or different) represent an integer of from 0 to 1, R and R' (same or different) represent an aliphatic hydrocarbon radical containing from 1 to 30 carbon atoms and wherein the sum of the total number of carbon atoms of R and R' is between 7 and 40, and its use for improving the release performance of metal carboxylate containing polyisocyanate compositions for woodbinding.

Abstract: A method for the preparation of a flexible foam, an integral skin foam or a microcellular elastomer by reacting an organic polyisocyanate and an isocyanate-reactive composition comprising at least one isocyanate-reactive compound of molecular weight of 1000 to 10000 and a functionality of 2 to 4 in the presence of a blowing agent, characterized in that the reaction is conducted in the presence of an inert, insoluble, organic liquid which has a boiling point of at least 60.degree. C. at 1 bar. CFC-free foams and elastomers of good quality are obtainable.

Abstract: Compositions are provided which comprise an organic polyisocyanate and at least one compound corresponding to the following general formula (I) or (II) ##STR1## wherein Y represents Zn, Ni, Co, Cd, Pb, Sn or Cu;X.sub.1, X.sub.2, X.sub.3, X.sub.4, X.sub.5, X.sub.6, X.sub.7, and X.sub.8 each independently represents O or S;R.sub.1 and R.sub.2 each independently represents a saturated aliphatic hydrocarbon radical having 1 to 20 carbon atoms or an aromatic ring with the proviso that R.sub.1 and R.sub.2 are only existing if Y is Sn(IV);R.sub.3, R.sub.4, R.sub.6 and R.sub.7 each independently represents hydrogen or a saturated aliphatic hydrocarbon radical having 1 to 20 carbon atoms;R.sub.5 and R.sub.

Abstract: Reaction system for preparing elastomers according to the RIM process, the system comprising an allophanate modified polyisocyanate, a polyol and an aromatic polyamine chain extender. No IMR is necessary.

Abstract: A method for the preparation of a flexible foam, an integral skin foam or a microcellular elastomer by reacting an organic polyisocyanate and an isocyanate-reactive composition comprising at least one isocyanate-reactive compound of molecular weight of 1000 to 10000 and a functionality of 2 to 4 in the presence of a blowing agent, characterised in that the reaction is conducted in the presence of an inert, insoluble, organic liquid which has a boiling point of at least 60.degree. C. at 1 bar. CFC-free foams and elastomers of good quality are obtainable.

Abstract: A process for preparing polymeric foams which comprises reacting:a) an organic polyisocyanateb) an isocyanate-reactive composition comprising:i) an organic polyfunctional isocyanate reactive composition comprising at least 50% w of polyfunctional isocyanate reactive compounds having a molecular weight of above 1500 wherein at least 25% of the isocyanate reactive groups are imino or enamino groups, and at most 50% by weight of polyfunctional isocyanate reactive compounds having a molecular weight of 60-1500, andii) a catalytically effective amount of a carbodiimide promoting catalyst, andiii) optionally other catalysts and/or further conventional additives, in the substantial absence of water and chlorofluorocarbon blowing agent.

Abstract: An isocyanate-reactive polymer comprising the reaction product of: (a) an isocyanate-terminated polyurethane prepolymer formed by reacting a polymeric polyol having a hydroxyl equivalent weight of at least 500 with a stoichiometric excess of an organic polyisocyanate, and (b) a stoichiometric excess, relative to the free isocyanate groups present in the prepolymer, of an imino-functional or enamine containing compound having a molecular weight less than about 750. The polymer is useful in reaction injection molding systems as an isocyanate-reactive ingredient.

Abstract: Polyurethane/urea foams are derived from prepolymers having branched chain linked isocyanate end groups and components containing isocyanate reactive imino/enamino-functional compounds.

Abstract: Polyisocyanate compositions with useful properties are obtained by reacting uretonimine and/or carbodiimide modified polyisocyanates with carboxylic acids.The polyisocyanate compositions are useful in the preparation of elastomeric products.

Abstract: A process for making integral skin foams which comprises reacting into a closed mould:A) an organic polyisocyanateB) an isocyanate-reactive composition comprising:(i) a catalytically effective amount of a urethane-promoting catalyst and optionally a urea-promoting catalyst,(ii) a catalytically effective amount of a carbodiimide-promoting catalyst, and(iii) an isocyanate-reactive compound; in the presence ofC) an inert physical blowing agent.The process provides integral skin foams having good skin properties at reduced physical blowing agent levels.

Abstract: Polyurethane/polyurea foams are made by reacting an organic polyisocyanate with resins containing imino/enamino-functional groups in the presence of blowing agents. Control of foam properties is offered by selecting imino/enamino-functional groups which decompose with water at the temperature of the reaction to produce volatile gases.

Abstract: An isocyanate-reactive polymer comprising the reaction product of:(a) an isocyanate-terminated polyuretane prepolymer formed by reacting a polymeric polyol having a hydroxyl equivalent weight of at least 500 with a stoichiometric excess of an organic polyisocyanate, and(b) a stoichiometric excess, relative to the free isocyanate groups present in the prepolymer, of an imino-functional or enamine-containing compound having a molecular weight less than about 750.

Abstract: A polyisocyanate composition comprising a reaction product of a stoichiometric excess of an organic polyisocyanate and:(i) a polymeric polyol having an average nominal hydroxyl functionality greater than 2 and an average hydroxyl equivalent weight of from about 500 to about 5000, and(ii) a polymeric polyamine having an average nominal primary and/or secondary amino functionality of from about 2 to about 3 and an average amine equivalent weight of from about 500 to about 5000, the polyol and the polyamine having glass transition temperatures below room temperature. The composition is especially useful in the production of elastomers by the RIM process.

Abstract: A polyisocyanate composition, suitable for use in the production of elastomers by the RIM process, or foams, said composition being the product of reacting an imino-functional or enamine-containing compound having a molecular weight of at least 1000 with a stoichiometric excess of an organic polyisocyanate.

Abstract: A polyisocyanate composition, suitable for use in the production of elastomers by the RIM process, said composition being the product of reacting an alcohol and/or thiol having an average hydroxyl and/or thiol functionality of from about 1.5 to about 4 and an average hydroxyl and/or thiol equivalent weight of at least 500 with at least 2 equivalents, per hydroxyl and/or thiol equivalent, of an organic polyisocyanate under such conditions that at least about 20% of the initially formed urethane and/or thiourethane groups are converted to allophanate and/or thioallophanate groups.