| 摘要 |
1,154,228. Esters. FARBWERKE HOECHST A.G. 7 Sept., 1966 [8 Sept., 1965], No. 40002/66. Heading C2C. Esters containing a hydroxyl group in the #-position to the ester group, and an ether group in theγ-position on the same alcohol side of the ester group are prepared by reacting a glycidyl ether of an aliphatic alcohol of 16 to 30 carbon atoms with either a monocarboxylic acid of 7 to 24 carbon atoms or a polycarboxylic acid having 2 to 12 carbon atoms and 2 to 6 carboxyl groups. The reaction is preferably carried out in the absence of atmospheric oxygen but in the presence of an acid or base catalyst in 0À5 to 4% preferably 2 to 3% proportions by weight of the total mixture, at temperatures between 50 and 300‹ C. more preferably between 80 and 200‹ C. The starting materials are preferably used in equimolar proportions or with an excess of glycidyl ether (about 1 to 3% by weight). The ether is preferably one formed from an alcohol having 16 to 24 carbon atoms, e.g. cetyl, stearyl, behenyl alcohol or mixtures thereof or from the synthetic alcohols obtained from the reaction of ethylene with aluminium triethyl. If the acid is monocarboxylic, it has preferably 7 to 22 carbon atoms; if the acid is polycarboxylic, it has preferably 2 to 8 carbon atoms and 2 to 4 carboxyl groups. The esters thus-formed are hard waxes soluble at room temperature in organic solvents such as balsam, turpentine, gasoline or trichlorethylene to give brilliant films or polishes on evaporation of the solvent. |
