发明名称 |
Maleic anhydride copolymer. |
摘要 |
A maleic anhydride copolymer comprising maleic anhydride units (I), conjugated diene units (II) and aliphatic monoolefin units (III) is provided. This copolymer has the weight-average molecular weight of from 500 to 50000. The molar ratio of unit (I)/(unit (II) + unit (III)) ranges from 30/70 to 90/10 and the molar ratio of unit (II)/unit (III) ranges from 5/95 to 90/10. A hydrolyzed prodcut of the copolymer or a water-soluble maleic acid copolymer is also provided. The hydrolyzed product is advantageously used as scale inhibitor , dispersant for calcium carbonate or additive for cement and concrete. <IMAGE> |
申请公布号 |
EP0467287(B1) |
申请公布日期 |
1995.05.03 |
申请号 |
EP19910111838 |
申请日期 |
1991.07.16 |
申请人 |
TOSOH CORPORATION |
发明人 |
OKAZAWA, TOMOYUKI;TOKUMARU, SEIICHI;OHIRA, HIDEO;ISHII, MASAO;KANO, YOSHIAKI |
分类号 |
C02F5/10;C04B24/26;C08F8/12;C08F210/00;C08F210/08;C08F222/06;C08F236/04 |
主分类号 |
C02F5/10 |
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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