Patent GB-895967-A (GB)
Title: Improvements in or relating to the manufacture of polymeric materials
Inventor: AITKEN ROXBURGH RICHMOND
IPC: C08G18/68
Filed: 1958-12-23
Abstract: A process for the manufacture of polyurethane materials by interacting an organic polyisocyanate with a hydroxyl group-containing polymer such as a polyester, polyesteramide or polyether, is characterized in that there is used a hydroxyl group-containing polymer which itself contains combined halogen atoms in its structure, in conjunction with an organic halogen compound soluble in one or more of the polyurethane-forming reactants. Halogen-containing starting materials from which they may be derived are 2:3:4:5-tetrachlorophthalic acid, hexachloroendomethylene tetrahydrophthalic acid and chloromaleic acid or corresponding fluoro, bromo or iodo compounds.  In the case of the polyethers the halogenated acid itself or its reaction product with a polyol may be used as an initiator for the polymerization of a cyclic ether. Halogen-compounds suitable for dissolving in the polymer are tri-b -chloroethyl phosphate, tri(2:3-dichloropropyl) phosphate, chlorinated paraffin waxes, benzatrichloride, chloroform, benzyl chloride, 2-chloroethanol, 2,3-dichloropropanol, 2,3-dichlorobutanol, 1:4-dihydroxy-2:3-dichlorobutane, 2:2:2-trichloroethanol, 2:3-dichloropropionic acid, 2,3-dichloro-2-methylpropionic acid, methyl-3:4:5:6-tetrachlorophthalate, methyl - hexachloro - endomethylene tetrahydrophthalate, and chorinated anilines, N-methylanilines, toluidines and substituted toluidines.  Chloral hydrate may be dissolved in the water used as a reactant in the preparation of foams.  Solid arsenic, antimony or bismuth compounds such as the oxide or sulphide may also be incorporated in the products.  In examples foamed products are prepared (1) by reacting a polyester from 1:3-butylene glycol, adipic acid and hexachloroendomethylene tetrahydrophthalic acid, water, an octyl cresol/ethylene oxide condensate, 2:3-dibromopropanol or tri-b -chlorethyl phosphate and a diphenylmethane diisocyanate obtained by phosgenating crude diaminodiphenylmethane containing 15% polyamines; (2) by a similar process from a polyester obtained on reacting pentaerythritol, 1:3-butylene glycol, adipic acid, tetrabromophthalic anhydride and phthalic anhydride. Specifications 732,624, 818,330 and 895,966 are referred to.ALSO:A process for the manufacture of polyurethane materials (which may include foamed cellular materials) by interacting an organic polyisocyanate with a hydroxyl group-containing polymer such as a polyester, polyesteramide or polyether, is characterized in that there is used a hydroxyl group-containing polymer which itself contains combined halogen atoms in its structure, in conjunction with an organic halogen compound soluble in one or more of the polyurethane-forming reactants. Halogen-containing compounds from which the polymer may be derived are 2 : 3 : 4 : 5-tetrachlorophthalic and, hexachloro endomethylene tetrahydrophthalic acid and chloromaleic acid and the corresponding fluoro, bromo or iodo compounds.  In the case of the polyethers the halogenated acid itself or its reaction product with a polyol may be used as initiator for the polymerization of a cyclic ether.  Halogen compounds suitable for dissolving in the polymer are tri-b -chloroethyl phosphate, tri (2: 3-dichloropropyl) phosphate, chlorinated paraffin waxes, benzotrichloride, chloroform, benzyl chloride, 2-chloroethanol, 2, 3-dichloropropanol, 2, 3-dichlorobutanol, 1 : 4-dihydroxy -2: 3-dichlorobutane, 2 : 2 : 2-trichloroethanol, 2 : 3-dichloropropionic acid, 2 : 3-dichloro-2-methylpropionic acid, methyl 3 : 4 : 5 : 6-tetrachlorophthalate, methyl hexachloro-endo-methylene tetrahydrophthalate, and chlorinated anilines, N-methylanilines, toluidines and substituted toluidines. Chloral hydrate may be dissolved in the water used as a reactant in the preparation of foams.  Solid arsenic, antimony or bismuth compounds such as the oxide or sulphide may also be incorporated in the products.  In examples foamed products are prepared (1) by reacting a polyester from 1 : 3-butylene glycol, adipic acid and hexachloroendomethylene tetrahydrophthalic acid, water, an octyl cresol/ethylene oxide condensate, 2 : 3-dibromopropanol or tri-b -chlorethyl phosphate and a diphenylmethane diisocyanate obtained by phosgenating crude diaminodiphenyl methane containing 15% polyamines; (2) by a similar process from a polyester obtained on reacting pentaerythritol, 1 : 3-butylene glycol, adipic acid, tetrabromophthalic anhydride and phthalic anhydride. Specifications 732,624, 818,330 and 895,966 are referred to.