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    Flame-resistant urethane foams and process for preparing same
    8.
    发明授权
    Flame-resistant urethane foams and process for preparing same 失效
    耐火聚氨酯泡沫及其制备方法

    公开(公告)号：US3075927A

    公开(公告)日：1963-01-29

    申请号：US3487260

    申请日：1960-06-09

    Applicant: UNION CARBIDE CORP

    Inventor： LANHAM WILLIAM M

    IPC: B27K3/15 ,  B27K3/52 ,  C08G18/48 ,  C08J9/00 ,  D06M15/244

    CPC classification number: D06M15/244 ,  C08G18/4879 ,  C08J9/0061 ,  C08J9/0095 ,  C08J2375/00 ,  C08J2375/08 ,  C08J2427/00 ,  C08K3/28 ,  C08L57/08 ,  C08L75/04

    Abstract: 930,397. Flame-resistant polyurethane. UNION CARBIDE CORPORATION. March 20, 1961 [June 9, 1960], No. 10000/61. Classes 2(5) and 2(6) [Also in Group V] A process for the production of flame-resistant polyurethane foams comprises reacting a polyether derivative of a benzene compound containing active hydrogens and having a molecular weight of at least 200 with an organic polyisocyanate in the presence of 0À5 to 5À0% by weight, based on the combined weight of polyether and organic polyisocyanate, of antimony trioxide and 1À0 to 10% by weight based on the combined weight of polyether and organic polyisocyanate, of a vinyl halide resin having a reduced viscosity of from 0À1 to 10À0. One-shot, prepolymer or semiprepolymer methods can be used in preparing the foams. Vinyl halide resins include homopolymers such as poly(vinyl chloride) and poly(vinylidene chloride) and copolymers of vinyl chloride with a vinyl ester of an alkanoic acid, acrylonitrile, vinylidene chloride, butyl maleate. Also included are partially hydrolysed vinyl chloride/ vinyl ester copolymers, containing reactive hydroxyl groups. These, and copolymers from monobutyl maleate, combine with the polyurethane molecule by reaction at the OH or COOH. The vinyl halide can be used as a plastisol dispersed in alkyl, haloalkyl, and aryl phosphates, alkyl phthalates, adipates, sebacates and azelates, epoxidized vegetable oil, tetrabutyl thiodisuccinate and N-substituted sulphonamides. The polyethers may be obtained by reacting alkylene oxides with resorcinol, pyrogallol, phloroglucinol, hydroquinone, 4,6- di-t-butylcatechol, catechol, orcinol, methylphloroglucinol, 2,5,6-trimethylresorcinol and other mono-nuclear polyhydroxybenzenes or polyhydroxy derivatives of fused ring aromatic compounds. Other polyethers used are derived from di-, tri- and tetraphenylol compounds; mononuclear, polynuclear and fused ring aromatic polyamines, phenolic and resole type resins, novolaks. The reaction with the alkylene oxide is effected in the presence of alkali. Also listed are suitable polyisocyanates, tertiary amine and tin compound catalysts. Water and/or fluoro-carbons are suitable blowing agents. In examples various amounts of antimony trioxide and polyvinyl chloride or vinyl chloride/acetate/alcohol copolymer are added, before foaming to mixtures of (1) a polyether blend of propylene oxide/1,1,3-tris(hydroxyphenyl) propane reaction product, a semiprepolymer prepared therefrom by reaction with tolylene diisocyanate, dibutyltin dilaurate, siloxane-oxyalkylene copolymer and trichloromonofluoromethane; (2) for comparison a propylene oxide adduct of glycerol, a semiprepolymer prepared therefrom, and other reactants as in (1); (3) a phenol-formaldehyde resin/propylene oxide reaction product, and a semiprepolymer therefrom, other reactants being as in (1); (4) polyether blend as in (1), propylene oxide reaction product of 4,41-diaminodiphenylmethane, tolylene diisocyanate, silicone oil surfactant, dibutyltin dilaurate, N,N,N 1 ,N 1 - tetramethyl-1,3-butanediamine and trichloromonofluoromethane.

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