专利名称：Copolymer for cement admixtures and its
production process and u
发明人：Masaya Yamamoto,Toru Uno,Yoshiyuki消防员的英语
Onda,Hiromichi Tanaka,Akihiko
Yamashita,Tsuyoshi Hirata,Naoko Hirano千岛湖大桥
祝贺词事业成功申请号：US10160757
申请日：20020601
公开号：US06727315B2
公开日：含数字的词语
20040427
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摘要：The prent invention provides: a copolymer for cement admixtures which
displays high dispersibility with a small adding amount and excellent dispersibility particularly even in a high water reducing ratio area, a cement admixture utilizing the copolymer, and a cement composition, and further, a production process for the copolymer. The copolymer for cement admixtures compris: constitutional unit (I) derived from unsaturated polyalkylene glycol ether monomer (a) having an alkenyl group having 5 carbon atoms and an oxyalkylene group having 2 to 18 carbon atoms with an average addition number of moles of the oxyalkylene groups to be in the range of 10 to 300; and constitutional unit (II) derived from unsaturated monocarboxylic acid monomer (b). The cement admixture includes the copolymer for cement admixtures as an esntial component, and may further include a defoaming agent. The cement composition includes the copolymer for cement admixtures, and cement as esntial components. The production process for the copolymer compris: copolymerizing comonomers including unsaturated polyalkylene glycol ether monomer (a) and unsaturated monocarboxylic monomer (b) as esntial components by u of a chain-transfer agent, and/or adjusting pH of a resultant reaction mixture to not less than 5 after the copolymerization.苹果修改密码
申请人：YAMAMOTO MASAYA,UNO TORU,ONDA YOSHIYUKI,TANAKA HIROMICHI,YAMASHITA AKIHIKO,HIRATA TSUYOSHI,HIRANO NAOKO 更多信息请下载全文后查看
