Patent GB-419373-A (GB)
Title: Improvements in or relating to the manufacture of resinous products
IPC: C08G63/91
Filed: 1933-05-11
Abstract: Polyhydric alcohol-polybasic acid resins are treated with a keten such as keten, methyl keten, ethyl keten, stearyl keten, dimethyl keten, diphenyl keten or diphenylene keten preferably in the presence of an inert solvent such as ether or acetone.  The keten gas with or without an inert gas such as nitrogen or carbon dioxide may be passed into the resin solution and the highly boiling ketens may be added solid or in solution in ethers, ketones hydrocarbons or other inert solvents to the resin.  For the manufacture of the resin suitable polybasic acids include phthalic, succinic, sebacic, fumaric, tartaric, citric, dilactylic, tricarballylic, salicylacetic, chlorophthalic, pyromellitic, naphthalic, hexahydrophthalic, diphenic and quinolinic acids; suitable polyhydric alcohols include glycerol, ethylene glycol, butylene glycol, diethylene glycol, pentaerythritol, mono alkyl and aryl ethers of glycerol; suitable modifying agents include monobasic acids such as butyric, oleic, stearic, lactic, benzoic, salicylic, abietic acids or the fatty acids of chinawood or cotton seed oils, natural resins such as rosin, kauri or congo, monohydric alcohols such as butyl, lauryl, benzyl and cyclohexyl alcohols and esters such as amyl acetate, dibutyl phthalate, tricresyl phosphate, olein, castor oil, linseed oil, coconut oil, soya bean oil, ethyl abietate and ester gum. The resinification may take place in the presence of esterification catalysts such as sulphuric acid or sulphonic acids and/or in the presence of inert solvents such as aromatic hydrocarbons, chlorobenzene, glycol diethyl ether, dichlorodiethyl ether, aliphatic or terpenes hydrocarbons.  In examples: (1) a resin prepared from glycerol and phthalic anhydride is dissolved in acetone and treated with keten or dimethyl keten to give a product which is compatible with nitro cellulose used as solvent a mixture of cyclohexanone and cellosolve acetate; (2) a resin prepared by heating glycerol with phthalic anhydride is dissolved in acetone and treated with keten or with an etheralcohol solution of ethyl keten to give a resin compatible with nitro cellulose and giving films therefrom when using cellosolve acetate as a solvent; (3) a solution of a resin prepared from glycerol, phthalic anhydride and linseed oil fatty acids in hiflash naphtha or the diethyl ether of glycol is treated with keten to give a product compatible in nitrocellulose.  The products may be used as coating compositions for wood and metal, in the manufacture of plastics, cements, adhesives, binding agents for glass plates, mica sheets or cellulose acetate, impregnating, coating and waterproofing agents for paper, fabrics and porous stone.  The following substances may be used in conjunction with the resin :--cellulose derivatives such as ethyl cellulose, nitrocellulose, cellulose acetate, benzyl cellulose, cellulose acetopropionate; natural gums such as rosin, kauri and dammaer; combined natural gums such as ester gum and ethyl abietate; drying oils such as linseed and chinawood oils; synthetic resins such as phenol-formaldehyde, amine-aldehyde and vinyl condensation or polymerisation products, bitumens such as asphalts; pigments; fillers; lakes; plasticizers; antioxidants and solvents.