发明授权
US4478958A Method for preparing phenolic foams using anhydrous aryl sulfonic acid
catalysts
失效
使用无水芳基磺酸催化剂制备酚醛泡沫的方法
- 专利标题： Method for preparing phenolic foams using anhydrous aryl sulfonic acid catalysts
- 专利标题（中）： 使用无水芳基磺酸催化剂制备酚醛泡沫的方法
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申请号： US396707申请日： 1982-07-09
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公开(公告)号： US4478958A公开(公告)日： 1984-10-23
- 发明人: John D. Carlson , Edward W. Kifer , Vincent J. Wojtyna , James P. Colton
- 申请人： John D. Carlson , Edward W. Kifer , Vincent J. Wojtyna , James P. Colton
- 申请人地址： PA Pittsburgh
- 专利权人： Kopper Company, Inc.
- 当前专利权人： Kopper Company, Inc.
- 当前专利权人地址： PA Pittsburgh
- 主分类号： C08J9/04
- IPC分类号： C08J9/04 ; C08J9/14 ; C08K5/42 ; C08L61/04 ; C08L61/06 ; C08L61/10
摘要：
The present invention is directed to a method of preparing a phenolic foam that has cell walls which are substantially free of perforations. The method comprises using certain anhydrous aryl sulfonic acids as the foaming and curing catalysts. The useful anhydrous aryl sulfonic acids are those which have a pKa of less than about 2.0 and which change the compatibility of the phenolic resole with water. The preferred anhydrous aryl sulfonic acid is a combination of toluene sulfonic acid and xylene sulfonic acid. The invention is also directed to a phenolic foam having cell walls which are substantially free of perforations and to foamable phenolic resole compositions for preparing the phenolic foam.
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