Modified polyoxytetramethylene glycol and processes for its production.

摘要

A modified polyoxytetramethylene glycol having a main chain with a repeating structure comprising a polyoxytetramethylene group of the formula @O(CH2)4@n wherein n is from 3 to 28, and a dioxycarbonyl group of the formula -O @O-, wherein the oxytetramethylene group -O(CH2)4- constitutes from 75.5 to 99.3 mol% and the dioxycarbonyl group constitutes from 24.5 to 0.7 mol%.