Patent GB-695276-A (GB)
Title: Improvements in or relating to synthetic resin moulding compositions
IPC: C08K3/20
Filed: 1949-12-30
Abstract: Into compositions for moulding comprising one or more synthetic resins, with or without a minor proportion, i.e. up to 50 per cent, of natural or synthetic rubber, are incorporated finely-divided oxides which have been produced by thermal decomposition of volatile compounds of metals or metalloids in the vapour state by means of oxidizing or hydrolysing agents, exemplified by oxides and hydroxides produced by the action of water vapour on ferric chloride, aluminium chloride, titanium tetrachloride, beryllium chloride, beryllium acetate, chromyl chloride, vanadyl chloride, and silicon tetrachloride in the vapour state and oxides produced by the action of oxygen or air on iron pentacarbonyl, nickel carbonyl, zinc dimethyl, and magnesium dimethyl.  Highly dispersed silica produced by such thermal decomposition of a volatile silicon compound is preferred.  The synthetic resins include polyisobutylene, copolymers of isobutylene with vinyl acetate, polymeric vinyl and acryl compounds.  The synthetic resins may be subjected to polymerization before or after addition of the oxides; according to an example 0.01 per cent of silica aerosol is mixed with a mixture of 3 parts of pulverulent polymethacrylic acid methyl ester and 1 part of monomeric methacrylic acid methyl ester, and the polymerization completed by heating for 1/2 hour to 100 DEG  C.ALSO:Finely divided oxides which have been produced by thermal decomposition of volatile compounds of metals or metalloids in the vapour state by means of oxidizing or hydrolyzing agents are incorporated in compositions for moulding comprising one or more synthetic resins with or without a minor proportion of natural or synthetic rubber.  Examples are the oxides and hydroxides produced by the action of water vapour on ferric chloride, aluminium chloride, titanium tetrachloride, beryllium chloride, beryllium acetate, chromyl chloride, vanadyl chloride, silicon tetrachloride in the vapour state and oxides produced by the action of air or oxygen on iron pentacarbonyl, nickel carbonyl, zinc dimethyl, magnesium dimethyl.  Highly dispersed silica produced by the thermal decomposition of a volatile silicon compound is preferred.  The hydrolysis or oxidation may advantageously be carried out in a gas such as nitrogen or carbon dioxide or in the presence of a combustible gas such as hydrogen, illuminating gas, water gas, or coke oven gas.ALSO:Into compositions for moulding comprising one or more synthetic resins, with or without a minor proportion, i.e. up to 50 per cent., of natural or synthetic rubber, are incorporated finely divided oxides which have been produced by thermal decomposition of volatile compounds of metals or metalloids in the vapour state by means of oxidizing or hydrolyzing agents, exemplified by oxides and hydroxides produced by the action of water vapour on ferric chloride, aluminium chloride, titanium tetrachloride, beryllium chloride, beryllium acetate, chromyl chloride, vanadyl chloride, and silicon tetrachloride in the vapour state and oxides produced by the action of air or oxygen on iron pentacarbonyl, nickel carbonyl, zinc dimethyl and magnesium dimethyl, highly dispersed silica produced by such thermal decomposition of a volatile silicon compound.  The Specification, as open to inspection under Sect. 91, comprises also the incorporation of the oxides, or of the oxides together with other fillers such as carbon black and aluminium oxide, in moulding compositions wholly of natural or synthetic rubber, the production of motor tyre tread mixtures and of transparent or coloured bicycle tyres being referred to.  This subject-matter does not appear in the Specification as accepted.