发明授权
- 专利标题: Cement admixture for improved slump life
- 专利标题(中): 改善坍落度寿命的水泥外加剂
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申请号: US11329233申请日: 2006-01-11
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公开(公告)号: US07375163B2公开(公告)日: 2008-05-20
- 发明人: Irene Schober , Theodor A. Bürge , Ulf Velten , Jürg Widmer , Christian M. Bürge , Urs Mäder
- 申请人: Irene Schober , Theodor A. Bürge , Ulf Velten , Jürg Widmer , Christian M. Bürge , Urs Mäder
- 申请人地址: CH Baar
- 专利权人: Sika Technology AG
- 当前专利权人: Sika Technology AG
- 当前专利权人地址: CH Baar
- 代理机构: Bingham McCutchen LLP
- 优先权: EP00105910 20000322
- 主分类号: C08F220/66
- IPC分类号: C08F220/66
摘要:
Described are polymers and cement admixtures which reduce drop in fluidity with time. Said admixture comprises at least one polymer of the present invention and at least one polymer A. The polymer of the present invention comprises side chains of which at least 10 weight-% can be cleaved in alkaline medium. The polymer of the present invention is an acrylic polymer which comprises side chains connected to the backbone by ester linkages. These side chains may be alkyl, hydroxy alkyl, cycloalkyl or polyoxyalkylene groups. Polymer A is a cement dispersing agent. The combination of polymer A with the polymer of the present invention in a weight ratio of 0.1:10-10:1, and preferably 1:10-10:1 reduces the drop in fluidity with time of cementitious compositions.
公开/授权文献
- US20070032599A1 Cement admixture for improved slump life 公开/授权日:2007-02-08
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