LONG-CHAIN POLYGLYCIDYL ESTERS CONTAINING ALIPHATIC OR CYCLOALIPHATIC ACID RESIDUES, PROCESSES FOR THEIR MANUFACTURE AND THEIR USE

摘要

1,254,177. Polyglycidyl esters; polyalkylene glycol derivatives. CIBA-GEIGY A.G. 28 Jan., 1969 [29 Jan., 1968], No. 4594/69. Headings C3B and C3R. Novel polyglycidyl esters of the general formula: where R, and R 2 are the residues notionally derived by removing the carboxyl groups from an aliphatic or oycloaliphatic acid having m + 1 and n + 1 carboxyl groups respectively, A is a residue of a polyalkylene glycol of average molecular weight at least 200, and m and n are 1, 2 or 3, are prepared by reacting a partial ester of the formula where Ra is H or a cation, preferably alkali metal, with an epihalohydrin in one or several stages. Several modifications are described but the preferred method comprises reacting an epihalohydrin in the presence of a catalyst, e.g. a tert. amine as quaternary ammonium compound, with a partial ester of the above formula wherein R 3 is H to form an intermediate product containing at least one halohydrin group and dehydrohalogenating. Other catalysts specified for the addition of epihalohydrin include ionexchange resins, trialkyl hydrazonium salts, thioethers and sulphonium salts. The polyglycidyl esters may be cured by any of the usual epoxy resin curing agents and many are specified. They may be mixed with active diluents, e.g. styrene oxide, various glycidyl ethers and esters and cycloaliphatic mono-epoxides. They may also be mixed with other curable polyepoxides, phenoplasts and aminoplasts. Specified fillers which may be added are anthracite tar, bitumen, glass fibres, boron fibres, carbon fibres, cellulose, polyethylene and polypropylene powder, mica, asbestos, quartz powder, slate powder, aluminium trihydrate, chalk powder, gypsum, antimony trioxide, bentones, silica aerogel, lithopone, barytes, titania, carbon black, graphite, iron oxide, A1 or Fe powder. Plasticizers, e.g. phthalates, phosphates and polypropylene glycols, and solvents may also be added. The polyglycidyl esters may be partially or completely esterified, particularly with higher unsaturated fatty acids. Uses-Laminating, coating etc. compositions, floor covering, adhesives, embedding and insulating compositions for electrotechnology.