公开(公告)号：EP1104394B1

公开(公告)日：2003-11-12

申请号：EP99944359.1

申请日：1999-07-30

申请人： Construction Research & Technology GmbH

发明人： BROWN, Heath ,  BURY, Jeffrey, R. ,  HUANG, Lan ,  LU, Runhai ,  OSBORNE, Jesse ,  SROKA, Kenneth ,  VICKERS, Thomas, M.

IPC分类号： C04B28/02 ,  C04B24/26 ,  C08F222/06

CPC分类号： C04B24/2647 ,  C04B24/163 ,  C04B24/243 ,  C04B24/26 ,  C04B24/2641 ,  C04B24/2652 ,  C04B24/2664 ,  C04B24/267 ,  C04B24/2688 ,  C04B24/2694 ,  C04B2103/408 ,  C04B2111/00068

摘要： The present invention is directed to cementitious dry cast mixtures for forming cementitious articles, particularly a cementitious dry cast mixture containing a dispersant, wherein said dispersant is a derivatized polycarboxylate dispersant which is a polymer comprising units derived from at least a substituted carboxylic acid monomer or substituted ethylenically-unsatured monomer, and optionally including at least one of an unsaturated hydrocarbon, an N-polyoxyalkylene maleimide, and a condensation product of an unsubstituted carboxylic acid monomer and an alkoxypolyoxyalkylene primary amine substituted carboxylic acid monomer. The cementitious dry cast mixture has a reduced effective dose of dispersant; compacts and consolidates in response to vibration energy; reduces the cycle time in the production of articles manufactured from dry cast mixtures; provides for increased green strength, density, and early compressive strength; and improves the surface aesthetics of articles manufactured from dry cast mixtures. Additionally, a surface active agent/air entraining agent can be included in combination with the dispersant to provide for increased swipe effect.