| 摘要 |
PURPOSE:In the ring-opening polymerization of epsilon-caprolactone, a specific epi-bis type epoxy resin is added at a specific ratio to give the titled polymer which is used as a medical gypsum, a splinting material and a templating material. CONSTITUTION:Epsilon caprolactone, preferably of less than 0.02% moist content, is stirred under heating in the presence of 0.01-5.0pts.wt. of an epi-bis type epoxy compound of the formula, preferably n is zero, namely diglycidyl ether bisphenol A and a catalyst such as stannous chloride, generally in a nitrogen gas atmosphere at 120-220 deg.C to effect the ring-opening polymerization to give the objective polymer. The compound of the formula may be admixed to the monomer previously or immediately before or after polymerization while the polymerization degree is still low.
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