发明公开
- 专利标题： Use of nitromethane, nitroethane and 1-nitropropane for inhibiting the degradation of hydrochlorofluorocarbons utilized as foaming agents in the preparation of foamed polyurethanes and polyisocyanurates
- 专利标题（中）： 一种用于防止作为在生产发泡聚氨酯，和聚异氰脲的发泡剂的氯氟烃的分解方法。
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申请号： EP92106237.8申请日： 1992-04-10
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公开(公告)号： EP0508449A1公开(公告)日： 1992-10-14
- 发明人: Basile, Giampiero , Musso, Ezio , Tonelli, Claudio , Girolomoni, Sauro
- 申请人： AUSIMONT S.p.A.
- 申请人地址： 31, Foro Buonaparte I-20100 Milano IT
- 专利权人： AUSIMONT S.p.A.
- 当前专利权人： AUSIMONT S.p.A.
- 当前专利权人地址： 31, Foro Buonaparte I-20100 Milano IT
- 代理机构： Zumstein, Fritz, Dr.
- 优先权： ITMI910989 19910411; ITMI911861 19910705
- 主分类号： C08J9/00
- IPC分类号： C08J9/00
摘要：
The invention relates to a method for inhibiting the degradation by dehydrohalogenation of hydrochlorofluorocarbons, such as for example the mixture of 123 and 123a, used as foaming agents during the formation reaction of foamed polyurethanes or polyisocyanurates starting from polyols and polyisocyanates. Prior to the reaction starting, a little amount of a stabilizing substance selected from the group consisting of nitromethane, nitroethane and 1-nitropropane is added to the reaction medium.
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