Patent GB-548137-A (GB)
Title: Improvements in polyester resins
IPC: C08G63/52
Filed: 1940-08-22
Abstract: 548,137. Polyhydric alcohol-poly carbonylic acid condensation products. AMERICAN CYNAMID CO. Aug. 22, 1940, No. 13350. Convention date, Dec. 13, 1939. [Class 2 (iii)] Polyester resins which may be converted by heat or oxidation into infusible and insoluble compositions are obtained by esterifying dicarboxylic acids or their anhydrides simultaneously with one or more polyhydric alcohols and with allyl alcohol or derivatives thereof. Esterification is effected by heating under azeotropic condition in presence of a solvent. Esterification catalysts may be employed and hardening of the ester is obtained by heating up to 165‹C. and with or without the aid of ultra violet or infra red radiations in presence of catalysts and/or inhibitors. The products obtained may be modified by monobasic acids and monohydric alcohols and mixed with fillers, dyes, or other synthetic or natural resins. The resins obtained are suitable for the production of coating compositions food containers, laminated paper, cloth material, electrical insulation, gear wheels, abrasive discs, brake linings, tobacco pouches, gaskets, &c. There are specified : (1) dibasic acids-maleic, fumaric, itaconic, mesaconic, and halogenated acids, e.g. chloromaleic acid, phthalic, sebacic, adipic, azelaic, terephthalic, pimelic, and brassylic acids. (2) mono-basic acids-acrylic, betabenzoylic acrylic, methacrylic - cyclohexene carboxylic, cinnamic, crotonic, undecylenic acids. (3) polyhydric alcohols-ethylene and polyethylene glycols, polymethylene glycols, octadecandiol, 2.2-dimethyl propane diol-1.3 ; 1.3 butane diol ; 1.2-propane diol ; 2-ethyl 2 butyl butanediol-1.3 ; glycerol or glycerol monoethers ; trimethylolpropane ; nitroglycols. (4) unsatucrated alcohols-allyl, and methylallyl alcohols, methyl vinyl carbinol, allyl carbinol, beta allyl ethyl alcohol, crotyl alcohol, halogenated allyl alcohols e.g. 2-chlor-allyl alcohol; monoallyl and monomethallyl ethers of ethylene glycol. (5) modifiers-monohydric saturated alcohols; drying oils or their fatty acids and esters, e.g. linseed oil, perilla oil, oiticica oil, sunflower seed oil, tung oil, olein, oleic acid stearin, stearic acid, castor oil, soya bean oil, olive oil. (6) solvents benzene, toluene, xylene, chloroform, carbon tetrachloride, ethylene or butylene di- or tri-chlorides, cresols, cyclo and methylcylo hexanone ; excess of the unsaturated alcohol itself may be used as solvent. (7) esterification catalysts-p-toluene sulphonic acid, thymol sulphonic, acid d-camphor sulphonic acid, stannic chloride, stannic chloride dioxanate. (8) polymerization catalysts acidic peroxides e.g. benzoyl, phthalic, succinic, benzoyl acetic peroxides ; fatty oil acid peroxides, e.g. lauryl, cocoanut oil and oleic peroxides ; alcohol peroxides, e.g. tertiary butyl peroxide and terpene oxides ; ascaridole. soluble cobalt salts, p-toluene sulphonic acid ; aluminium chloride, stannic chloride, boron trifluoride. (9) polymerization inhibitors polyhydric phenols, e.g. hydroquinone, resorcinol, tannin ; aromatic amines, e.g. alpha, beta-naphthylparaphenylene diamine ; phenolic resins ; sulphur compounds, benzaldehyde, 1-ascorbutic acid. (10) fillers-wood flour, paper dust, clay, zein, glass wool mica dust, asbestos, casein, silk or cotton flock, steel wool, carborundum, paper, cloth, sand, pigments ; dyes ; natural resins, e.g. shellac cellulose esters and ethers, synthetic resins, urea-aldehyde, triazine-aldehyde, phenolaldehyde, alkyds ; ester gum, rubber, and synthetic rubber products.