GB327722A - Improvements in the manufacture and production of condensation products - Google Patents

Abstract

327,722. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). Dec. 10, 1928. Band.-Synthetic resins are prepared by reacting ether or thio-ether dicarboxylic acids or their anhydrides with polyhydric alcohols (including ether-alcohols such as polyglycols and polyglycerols containing at least two hydroxy groups) or esters of polyhydric alcohols with fatty acids, such as oleic, elaeostearic, or the acids of linseed or China-wood oil, or the hydroxy alkyl esters of higher fatty acids which may be obtained by the reaction of olefine oxides or halogen hydrins on the corresponding acids, the esters in all cases containing at least one free hydroxy group. The dicarboxylic acids mentioned are diglycollic, methyl-diglycollic, dihydracrylic, salicyl-acetic, thiodiglycollic, thiodilactylic, and 2-carboxyphenyl thioglycollic acids. A part of the dicarboxylic acid may be replaced by phthalic, succinic, adipic or like dicarboxylic acid. The reaction mixture may contain higher fatty acids such as oleic or elaeostearic acids or the acids of linseed or China wood oil. The reaction may be effected with exclusion of oxygen, for instance in a current of inert gas or in vacuo or under pressure and with or without condensing agents such as metals, metal oxides, acids, acid or alkaline substances, sodium acetate, and zinc chloride, and with or without diluents or solvents such as phthalic esters, butyl diglycollates, glycol diacetate natural or artificial resins such as colophony or phenolformaldehyde condensation products. The products are suitable for the production of lacquers, films, insulating materials and many other articles, and various additions, such as ketones, alcohols, acetic esters, softening agents such as phthalic or phosphoric aesters, oils such as linseed and China-wood oil, waxes, fillers, and colouring matters may be added, at any stage before the final hardening for stance during the condensation process. Asbestos, slate-meal, talc, mica, alumina, slag-powder, lime and gypsum are mentioned as suitable fillers. The products may be used as substitutes for marble, slate, and ceramic products, for brake bands, grinding tools, &c. Specification 328,190, [Class 2 (iii), Dyes, &c.], is referred to.