Patent GB-422130-A (GB)
Title: Improvements in or relating to the manufacture of synthetic resins and compositions containing the same
IPC: C08G63/12
Filed: 1933-07-05
Abstract: Polyhydric alcohol-polybasic acid resins are prepared by (1) condensing a polyhydric alcohol with excess of a polybasic acid to yield a resin of high acid number, (2) dissolving the product in water in the presence of a volatile water soluble base such as ammonia or methylamine and (3) adding to the solution polyhydric alcohol and completing the resinification by baking after applying the resulting mixture to an article.  Modifying agents may be present and the polyhydric alcohol may be added to the acid resin before dissolving it in water or to the solvent water.  Suitable polyhydric alcohols include glycerol, ethylene glycol, butylene glycol, diethylene glycol, triethylene glycol, sorbitol, polyglycerol, pentaerythritol, mannitol, monoalkyl and monoarylethers of glycerol such as monobenzylin and pentaerythritol diethyl ether or mixtures thereof.  Suitable polybasic acids include phthalic anhydride, adipic, succinic, sebacic, fumaric, tartaric, citric, dilactylic, thiodilactylic, salicylacetic, diphenic, quinolinic, hexahydrophthalic, naphthalic, pyromellitic, tricarballylic and chlorophthalic acids or mixtures thereof.  Suitable modifying agents include monohydric alcohols such as butyl, cetyl, oleyl, ethoxyethyl, benzyl and cyclohexyl alcohols and alkyl lactates; monobasic acids such as fatty acids, aromatic acids and natural acidic gums including butyric, stearic and oleic acids, fatty oil acids derived from linseed, castor, chinawood, soya bean, rubberseed, coco-nut, fish and sunflower seed oils, lactic, pyruvic, benzoic, salicylic, naphthoic and benzoylbenzoic acids and kauri, pontianac and congo; and esters such as oils including cottonseed, linseed, chinawood, perilla, soya bean, coco-nut and castor oil and rosin glyceride, dibutyl phthalate, stearin, triacetin, tricresyl phosphate and amyl acetate.  Suitable bases include ammonia, methylamine, dimethylamine, diethylamine, butylamine, cyclohexylamine, ethylenediamine, tributylamine and ethanolamine.  The compositions may also contain pigments such as carbon black, chrome green, paratoner red, ultramarine blue and fillers, casein, gelatin, and emulsified rubber.  Where casein or gelatin is used the product may be hardened by treatment with formaldehyde.  The products may be used in the manufacture of coating compositions, impregnating or coating compositions for porous articles such as wood pulp, paper, fabrics, porous stone and earthenware in the manufacture of book-binding materials and leather substitutes, adhesives, cements, binders for cellulose acetate, mica and glass plates in the manufacture of laminated sheet and tube products, insulating materials and safety glass.  In examples: (1) glycerol is condensed with phthalic anhydride and the product, mixed with glycerol, is dissolved in a dilute aqueous solution of ammonia; (2) a mixture of ethylene glycol and glycerol is condensed with adipic acid, the product dissolved in dilute aqueous ammonia and glycerol added to the solution; (3) glycerol is stirred into the molten mass obtained by condensing glycerol, phthalic anhydride and linseed oil acids and the product dissolved in dilute aqueous ammonia with or without the addition of ethyl alcohol and carbon black; (4) cottonseed oil and glycerol are heated and then condensed with phthalic anhydride, the product being dissolved in a mixture of glycerol, methylamine and water; (5) glycerol, abietic acid and phthalic anhydride are condensed and the product, mixed with glycerol, is dissolved in dilute aqueous ammonia. Specification 422,131 is referred to.ALSO:Aqueous compositions containing polyhydric alcohol-polybasic acid resins are prepared by (1) condensing a polyhydric alcohol with an excess of a polybasic acid to yield a resin of high acid value; (2) dissolving the product in water in the presence of a volatile water soluble base such as ammonia or methylamine; and (3) adding to the solution a polyhydric alcohol, the resination being completed by baking after the application of the composition.  Modifying agents for the resins may be present and the polyhydric alcohol may be added to the acid resin before dissolving it in water or to the solvent water.  Pigments, casein, gelatin, or emulsified rubber may be added to the composition. Specification 422,131 is referred to.