发明名称 |
Process for producing a polyvinyl ester and polyvinyl alcohol having a high degree of polymerization. |
摘要 |
Disclosed herein is a new process for producing polyvinyl ester having a high degree of polymerization having an intrinsic viscosity not less than 1.5 dl/g, preferably not less than 2.2 dl/g, and most preferably higher than 3.2 dl/g, said process comprising subjecting vinyl ester monomer to low-temperature emulsion polymerization under specific conditions. Disclosed also herein is a new process for producing polyvinyl alcohol having a high degree of polymerization having an intrinsic viscosity not less than 1.5 dl/g, preferably not less than 2.2 dl/g, and most preferably higher than 3.2 dl/g, said process comprising saponifying in the usual way the polyvinyl ester obtained by low-temperature emulsion polymerization under specific conditions. |
申请公布号 |
EP0255137(A2) |
申请公布日期 |
1988.02.03 |
申请号 |
EP19870111054 |
申请日期 |
1987.07.30 |
申请人 |
KURARAY CO. LTD. |
发明人 |
SATO, TOSHIAKI;YUKI, KEN;YAMAUCHI, JUNNOSUKE;OKAYA, TAKUJI |
分类号 |
C08F2/24;C08F2/22;C08F4/40;C08F8/12;C08F16/02;C08F16/06;C08F18/00;C08F18/04;D01F6/14 |
主分类号 |
C08F2/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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