发明名称 |
METHOD OF PRODUCING POLYETHERESTER MONOMER AND CEMENT DISPERSANTS |
摘要 |
Polyetherester monomer of the kind (see above formula) where R1, R2 and R3 are each a group of a specified kind and A is a residual group of another specified kind is produced by an esterification reaction of polyalkyleneglycol with a closed end and unsaturated carboxylic acid, each of a specified kind, by using an acid catalyst under a heated and reduced-pressure condition in the absence of solvents and in the presence of a specified amount of p-benzoquinone and/or phenothiazine. Cement dispersants with improved properties are obtained from water-soluble vinyl monomers produced by using the polyetherester monomer thus obtained as intermediate product.
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申请公布号 |
CA2322899(C) |
申请公布日期 |
2010.02.23 |
申请号 |
CA20002322899 |
申请日期 |
2000.10.10 |
申请人 |
TAKEMOTO YUSHI KABUSHIKI KAISHA |
发明人 |
KINOSHITA, MITSUO;OKADA, KAZUHISA |
分类号 |
C07C69/54;C07C67/08;C07C69/56;C08F220/26;C08F228/02 |
主分类号 |
C07C69/54 |
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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