高相对分子质量聚醚的研制

Development of high relative molecular mass polyether

以丙二醇为起始剂,在氢氧化钾和双金属催化剂的催化下,用环氧乙烷封端合成了一种高相对分子质量高活性聚醚多元醇。考察了环氧化物进料速率、聚合反应温度、催化剂加入量、环氧乙烷用量等对聚醚多元醇及所制聚氨酯泡沫性能的影响,结果表明,环氧化物进料速率、聚合反应温度、催化剂加入量、w(环氧乙烷)分别为550g/h、(130±5)℃、30mg/kg、15%时为较佳合成条件。

Using propylene glycol as initiator,a high active polyether polyol with high relative molecular mass was synthesized in the presence of potassium hydroxide and double metal cyanide catalysts and end-capped with ethylene oxide.The influence of the feeding rate of epoxide,temperature of polymerization reaction,catalyst adding amount and ethylene oxide amount,etc.on performance of the polyether polyol and the prepared polyurethane foam was investigated.The results show that the optimal synthesis conditions are as follows:the feeding rate of epoxide is 550 g/h,the temperature of polymerization reaction is (130±5)℃,the catalyst adding amount is 30 mg/kg,w(ethylene oxide) is 15%.