发明授权
- 专利标题： Maleic anhydride copolymer
- 专利标题（中）： 马来酸酐共聚物
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申请号： US729756申请日： 1991-07-15
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公开(公告)号： US5336727A公开(公告)日： 1994-08-09
- 发明人: Tomoyuki Okazawa , Seiichi Tokumaru , Hideo Ohira , Masao Ishii , Yoshiaki Kano
- 申请人： Tomoyuki Okazawa , Seiichi Tokumaru , Hideo Ohira , Masao Ishii , Yoshiaki Kano
- 申请人地址： JPX Yamaguchi
- 专利权人： Tosoh Corporation
- 当前专利权人： Tosoh Corporation
- 当前专利权人地址： JPX Yamaguchi
- 优先权： JPX2-187495 19900716; JPX3-133565 19910509
- 主分类号： C02F5/10
- IPC分类号： C02F5/10 ; C04B24/26 ; C08F8/12 ; C08F210/00 ; C08F210/08 ; C08F222/06 ; C08F236/04
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 a 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 product of the copolymer or a water-soluble maleic acid copolymer is also provided. The hydrolyzed product is advantageously used for scale inhibitors, dispersants for calcium carbonate or admixtures for cement and conctrete.
公开/授权文献
- US5749022A Charging apparatus and method for use in image forming device 公开/授权日：1998-05-05