Anhydrous sugar alcohol alkylene glycol composition, anhydrous sugar alcohol based urethane modified polyol composition and their use for epoxy resin composition

摘要

Kind Code: A1 The present invention is environmentally friendly, does not harm the human body, and when used as a curing agent for epoxy resins, can improve the flexibility of the cured product while maintaining the degree of curing at a good level. An object of the present invention is to provide an anhydrosugar alcohol-alkylene glycol composition, an epoxy resin curing agent containing the same, and an epoxy resin composition containing the curing agent. The present invention provides (i) monoanhydrosugar alcohol-alkylene glycol, (ii) dianhydrosugar alcohol-alkylene glycol, and (iii) one or more polymers of monoanhydrosugar alcohol and dianhydrosugar alcohol. (1) the number average molecular weight (Mn) of the composition is from 280 to 1,000 g/mol; and (2) the polydispersity index (PDI) of the composition is from 1.77 to 5. 0, and (3) the composition has a hydroxyl value of 200 to 727 mgKOH/g. [Selection figure] None