Patent ID: 7470733
Filing Date: 2008-12-30
Classification: C04B

Abstract:
1. An additive for hydraulic compositions comprising: an antifoaming agent; and a phosphoric monoester having a group represented by general formula (1) below or a salt thereof (referred to hereinafter as the monoester) and a phosphoric diester (including a pyrophosphoric diester) having a group represented by the general formula (1) below or a salt thereof (referred to hereinafter as the diester): wherein R 1 represents a C8 to C22 alkyl or alkenyl group or a hydrocarbon group having two or more benzene rings, AO represents a C2 to C4 oxyalkylene group, and n is a number of 1 to 50 as the average added mole number, wherein the monoester weight content ranges from 0.4 to 0.95 in terms of monoester/(monoester+diester).