Title: Cement additive
Application Number: 03815863 Application Date: 2003.07.02
Publication Number: 1665756 Publication Date: 2005.09.07
Approval Pub. Date: 2006.09.27 Granted Pub. Date: 2006.09.27
International Classifi-cation: C04B24/26,C04B24/12,C08G65/333
Applicant(s) Name: NOF Corp. Address:
Inventor(s) Name: Matsui Tatsuya, Itoh Akinori
Attorney & Agent: zhou chengze
Abstract:
     A cement additive . The cement additive comprises an ingredient [A]: [A] a polycarboxylic acid copolymer which has a polyoxyalkylene chain and in which part or all of the carboxylic acid moieties have been esterified with a polyoxyalkylene-containing alcohol derivative represented by the formula [1] (wherein R<1> is a nitrogenous heterocycle or group represented by the formula [2], wherein R<2> and R<3> each is a C1-6 hydrocarbon group; AO is C2-4 oxyalkylene; and n1 is 1 to 8).
Time: 9