发明授权
US5198574A Process for the improved production of (meth)acrylic acid esters of
polyhydric alcohols (II)
失效
改进生产聚氨酯（II）的（甲基）丙烯酸酯的方法
- 专利标题： Process for the improved production of (meth)acrylic acid esters of polyhydric alcohols (II)
- 专利标题（中）： 改进生产聚氨酯（II）的（甲基）丙烯酸酯的方法
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申请号： US720445申请日： 1991-06-24
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公开(公告)号： US5198574A公开(公告)日： 1993-03-30
- 发明人: Wolfgang Ritter , Hans-Dieter Sitz , Ludwig Speitkamp
- 申请人： Wolfgang Ritter , Hans-Dieter Sitz , Ludwig Speitkamp
- 申请人地址： DEX Duesseldorf-Holthausen
- 专利权人： Henkel Kommanditgesellschaft auf Aktien
- 当前专利权人： Henkel Kommanditgesellschaft auf Aktien
- 当前专利权人地址： DEX Duesseldorf-Holthausen
- 优先权： DEX3843938 19881224
- 主分类号： B01J27/02
- IPC分类号： B01J27/02 ; B01J31/02 ; C07B61/00 ; C07C67/08 ; C07C67/62 ; C07C69/54 ; C08G65/332
摘要：
The invention relates to a process for the production of (meth)acrylic acid esters of polyhydric alcohols by reaction thereof with acrylic acid and/or methacrylic acid in the presence of acidic esterification catalysts with addition of polymerization inhibitors to the reaction mixture. The new process is characterized in that, where unsubstituted phenolic compounds are used as inhibitors, the esterification reaction is carried out with addition of active carbon to the reaction mixture. The preferred inhibitor is hydroquinone. In addition, the esterification reaction is preferably carried out in the absence of liquid solvents and/or azeotropic entraining agents.
公开/授权文献
- US5872820A Synchronization in TDMA systems in a non-realtime fashion 公开/授权日：1999-02-16
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