Process for preparing polyurethane compositions emitting reduced amounts of toxic fumes on burning
申请人:MOONEY CHEMICALS, INC.
公开号:EP0010931A1
公开(公告)日:1980-05-14
A process of forming polyurethane compositions which emit reduced amounts of toxic smoke on burning is described. The process comprises reacting a mixture of an organic compound having two or more active hydrogen atoms, an organic polyfunctional isocyanate, a catalyst and at least one metal salt of an aliphatic or alicyclic monocarboxylic acid wherein the metal is cobalt, copper, nickel or manganese. The metal salt is added to the mixture in an amount which is sufficient to reduce the formation of toxic substances when the polyurethane is ignited.
Polyurea polyurethan polymer polyol and its use in producing polyurethanes
申请人:TEXACO DEVELOPMENT CORPORATION
公开号:EP0044174A1
公开(公告)日:1982-01-20
Polyurethane polymer polyols can be prepared by reacting a hydroxyl-containing amine (e.g. ethanol-amine), a polyetherpolyol having a molecular weight of 2000 to 8000, and a less than stoichiometric amount of an organic polyisocyanate. The molar ratio of hydroxyl-containing amine to polyether polyol is from 0.5:1 to 3.5:1. The molar ratio of active hydrogen (in hydroxyl-containing amine and polyol) to isocyanate is from 1.4:1 to 3.5:1.
In a preferred embodiment, the stability of the polyurethane polymer polyols is enhanced by adding a secondary amine.
Polyurethane foams obtained by reacting the polyurethane polymer polyols with more polyisocyanate have generally better properties (e.g. tensile and tear strength, elongation and compression) than foams produced directly from hydroxyl-containing amine, polyether polyol and a stoichiometric amount of polyisocyanate.
Process for the production of polymer/polyisocyanate compositions and the use thereof for making polyurethanes
申请人:UNION CARBIDE CORPORATION
公开号:EP0037112A1
公开(公告)日:1981-10-07
Novel improved polymer/polyisocyanate composition made by polymerizing acrylonitrile alone or with one or more ethylenically unsaturated monomers in situ in a polyisocyanate. The polyisocyanate comprises a diarylalkylene diisocyanate; a polymeric diarylalkylene polyisocyanate; a quasi-prepolymer of a diarylalkylene diisocyanate or a polymeric diarylalkylene diisocyanate with an active hydrogen organic compound having at least two active hydrogen atoms per molecule; a mixture of a diarylalkylene diisocyanate, its carbodiimide and its trifunctional trimenc cycloadduct; or a mixture of two or more such polyisocyanates. to form a highly stable dispersion of small polymer particles in said polyisocyanate. The novel compositions are highly useful in the production of polyurethane products.
Curable molding composition and its use for producing thermoset fiber-reinforced molded articles
申请人:UNION CARBIDE CORPORATION
公开号:EP0052881A2
公开(公告)日:1982-06-02
Curable molding compositions comprising a mixture of:
I. from about 25 to about 90 weight percent of a thermosetting resin containing:
(a) from about 5 to about 95 weight percent of a polyester resin derived from the reaction of a poly(acrylate) and a vinyl monomer, said poly(acrylate) and vinyl monomer essentially free from functional groups reactive with the polyol of the polyisocyanate of (b);
(b) from about 95 to about 5 weight percent of a polyurethane derived from the reaction of a saturated polyol and a polyisocyanate, said polyol and polyisocyanate free from unsaturated groups capable of copolymerizing with the poly(acrylate) or vinyl monomer of (a); and
II. from about 75 to about 10 weight percent of one or more fibers with a melting point or a glass transition temperature above about 130°C; wherein (b) constitutes less than 40 weight percent of (I) and (II). These compositions are especially suited to produce thermoset fiber-reinforced molded articles by rapid injection molding techniques.
Polymer/polyisocyanate compositions, processes for making same and processes for making polyurethane products therefrom
申请人:UNION CARBIDE CORPORATION
公开号:EP0054261A1
公开(公告)日:1982-06-23
Novel polymer/polyisocyanate compositions made by polymerizing at least one ethylenically unsaturated monomer in situ in a blend of a first organic polyisocyanate and a stabilizer. The stabilizer comprises a polyoxyalkylene polyol having a number average molecular weight of at least 4000; an isocyanato terminated prepolymer formed by reacting the polyoxyalkylene polyol and a second organic polyisocyanate with the proviso that the isocyanato terminated prepolymer and the first organic polyisocyanate provide greater than 25 equivalents of isocyanato groups per equivalent of hydroxyl groups; a polymer/polyol formed using the polyoxyalkylene polyol; a polymer/prepolymer formed using the polyoxyalkylene polyol with the proviso indicated for the prepolymer above; or a modified polyol containing an ester group formed using the polyoxyalkylene polyol. The novel compositions provide highly stable dispersions of polymer particles in the first organic polyisocyanate and are highly useful in the production of polyurethane products.