Patent ID: 8399596

Claim:
A process, comprising distilling an epoxy resin composition which comprises a glycidyl ether comprising a cyclohexyl group and having a low oligomer content wherein said composition is prepared by ring hydrogenation of a compound of general formula (I) wherein —X— is —CR 2 —, —CO—, —O, —S—, or —SO 2 —, the radicals R are each, independently of one another, H, C 1-6 -alkyl, or C 3-6 -cycloalkyl, wherein one or more H atoms can be replaced by halogen, the radicals R′ are each, independently of one another, C 1-4 -alkyl, or halogen, and the indices n are each, independently of one another, 0, 1, 2 or 3, and said composition is further prepared by subsequent reaction of the hydroxyl groups with epichlorohydrin, wherein said distillation is carried out in a short path evaporator at a temperature in the range from 150 to 230° C. under a pressure in the range from 0.005 to 0.2 mbar, wherein the distilling forms an epoxy resin composition containing not more than 2.5% by weight of chlorine, and wherein the epoxy resin composition has a low oligomer content and comprises one or more compounds of formula (II): wherein —X— is —CR 2 —, —CO—, —O, —S—, or —SO 2 —; the radicals R are each, independently of one another, H, C 1-6 -alkyl or C 3-6 -cycloalkyl, wherein one or more H atoms can be replaced by halogen; the radicals R′ are each, independently of one another, C 1-4 -alkyl, or halogen; n are each, independently of one another, 0, 1, 2 or 3; and wherein the proportion of compounds having a molecular weight of from 0.5 to 1.12 times the molecular weight of the compound of the general formula (II) is at least 60% by weight; the proportion of compounds having a molecular weight of from greater than 1.12 to 1.53 times the molecular weight of the compound of the general formula (II) is less than 30% by weight; and the proportion of compounds having a molecular weight of from greater than 1.53 to 2.53 times the molecular weight of the compound of the general formula (II) is less than 2.5% by weight.