Patent ID: 9162926
Filing Date: 2015-10-20
Classification: B01D,C04B

Abstract:
1. Method for producing a hydraulic binder, comprising contacting a composition comprising cement clinker, before, during or after a grinding procedure, with (a) a defoaming agent and (b) 0.0005% to 2% by weight, based on the total composition, of at least one air-introducing compound, characterized in that the defoaming agent (a) comprises 0.0001% to 0.5% by weight, based on the total composition, of at least one defoaming agent of the formula where R m for each (C d for each (C x is an integer between 2 and 20 and c is an integer between 1 and 5, and the ratio of (a) to (b) is between 1:1 to 1:200.