发明授权
- 专利标题： Process for the manufacture of polythiobisphenols
- 专利标题（中）： 制备多羟基苯酚的方法
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申请号： US25330472申请日： 1972-05-15
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公开(公告)号： US3812192A公开(公告)日： 1974-05-21
- 发明人: GABLER R , STUDINKA J
- 申请人： INVENTA AG
- 专利权人： Inventa Ag
- 当前专利权人： Inventa Ag
- 优先权： CH765371 1971-05-26
- 主分类号： A01N41/12
- IPC分类号： A01N41/12 ; C08J3/24 ; C08K5/375 ; C08L21/00 ; C07C149/18
摘要：
A PHENOL WHICH IS UNSUBSTITUTED AT THE POSITION PARA TO THE HYDROXY GROUP OR UNSUBSTITUTED AT AT LEAST ONE OF THE POSITIONS ORTHO TO THE HYDROXY GROUP IS DISSOLVED IN A SOLVENT, IN THE ABSENCE OF HYDROGEN SULFIDE AND CATALYSTS, AND WHILE COOLING TO A TEMPERATURE BELOW 30* C. IS REACTED WITH DISULFUR DICHLORIDE. THE SOLVENT IS AN ACID AMIDE WHOSE NITROGEN ATOMS ARE COMPLETELY ALKYLATED. POLYTHIOBISPHENOLS ARE OBTAINED IN HIGH YIELD.
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