Patent GB-908649-A (GB)
Title: Improvements in or relating to the manufacture of polymeric materials
Inventor: PERRY PHILIP DAVID
IPC: C08G18/22
Filed: 1960-07-19
Abstract: A process for the manufacture of polymeric materials by the reaction of organic polyisocyanates with compounds containing at least two hydroxyl groups per molecule is characterized in that the reaction is carried out in the presence of a copper salt of a carboxylic acid. The salts specified are those of aliphatic carboxylic acids, or sulphated ricinoleic acid; basic salts such as basic copper acetate, or salts of dimethyl glycine and 6-dimethylamino caproic acid; salts of di- or tri-carboxylic acids, such as the reaction products of polyoxyalkylene diols or p  triols with two or three molecular proportions, respectively, of maleic or succinic anhydride; of N:N1-ethylenediamine tetracarboxylic acid; benzoic, phenylacetic, anthranilic, and cinnamic acids, phenylglycine; cycloaliphatic carboxylic acids. Also suitable are basic salts obtained by the treatment of non-basic salts with ammonia, pyridine or dialkylaminopyridine. The hydroxyl-group containing compound may be a polyester, polyesteramide, polyether or mixtures thereof.  Tertiary amine catalysts may be used together with the copper salts.  Iron and manganese acetylacetonate, dibutyl tin dilaurate and stannous octoate may also be incorporated.  The examples employ linear and branched polypropylene glycols as starting materials in the preparation of foamed products, the copper compounds used being cupric 2-ethylhexoate, cupric octoate, and reaction products of 4-dimethylamino pyridine and basic cupric acetate or cupric 2-ethylhexoate, or of dimethylbenzylamine with copper acetate hexahydrate or basic copper salicylate.ALSO:A process for the manufacture of polymeric materials (such as cellular polyurethanes) by the reaction of organic polyisocyanates with compounds containing at least two hydroxyl groups per molecule is characterised in that the reaction is carried out in the presence of a copper salt of a carboxylic acid.  The copper salts specified are those of aliphatic monocarboxylic acids or sulphated ricinoleic acid, basic salts such as basic copper acetate or salts of dimethylglycine or 6-dimethylaminocaproic acid; salts of di- or tri-carboxylic acids such as the reaction products of polyoxyalkylene diols or triols with two or three molecular proportions, respectively, of moleic or succinic anhydride; of N, N1-ethylenediamine tetracarboxylic acid; benzoic, phenylacetic, anthranilic, and cinnamic acids or phenyl-glycine; cycloaliphatic acids.  Also suitable are basic salts obtained by the treatment of non-basic salts with ammonia, pyridine or dialkylamino pyridines.  The hydroxyl group-containing compound may be a polyester, polyesteramide, polyether or mixtures thereof. Tertiary amine catalysts, or iron and manganese acetylacetonates, dibutyl tin di-laurate and stannous octoate may be used together with the copper salts. Foaming can be effected by carrying out the reaction in the presence of water and/or a low boiling point liquid such as monofluorotrichloromethane, dibromo-difluoromethane, dichloromono-fluoromethane, dichlorotetrafluoroethane, monochlorodifluoromethane and trifluoroethyl bromide.  Additives and anti-oxidants may be incorporated in the reaction mixture.  In the examples cellular products are prepared from linear or branched polypropylene glycols, tolylene -2 : 4- and 2 : 6-diisocyanates, water, amines and alkylsilanepolyoxyalkylene block copolymers, the copper salts used being cupric 2-ethylhexoate, cupric octoate, and reaction products of 4-dimethylaminopyridine and basic cupric acetate or cupric 2-ethylhexoate or of dimethylbenzylamine with copper acetate hexahydrate or basic copper salicylate.