发明名称 |
Process for decolorizing of resinous polymers. |
摘要 |
<p>Vinyl aromatic-conjugated diene copolymers having polymer chains which end with an alkali metal and which are obtained by the polymerization in solution of at least one vinyl aromatic hydrocarbon and of a conjugated diene in the presence of a catalyst based on an alkali metal are decolorized by treating the copolymer with a carboxylic acid of general formula (Y)2-n - X - (R-COOH)n in which X is S, S-CH2-S, or (S-S), and Y and R are alkyl radicals having 1 to 16 carbon atoms and n is 1 or 2.</p> |
申请公布号 |
EP0309434(A1) |
申请公布日期 |
1989.03.29 |
申请号 |
EP19880870151 |
申请日期 |
1988.09.20 |
申请人 |
LABOFINA S.A. |
发明人 |
LANZA, EMMANUEL;NAVEAU, JEAN M.M.G. |
分类号 |
C08F6/06;C08F6/02;C08F212/00;C08F212/06;C08F236/04;C08F236/10;C08F297/04 |
主分类号 |
C08F6/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|