Defoaming agent for cementitious compositions

Details Defoaming agent for cementitious compositions Defoaming agent for cementitious compositions

2002-11-25

2010-02-16

Harlan, Robert D. (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C106S819000, C106S823000

Reexamination Certificate

active

07662882

ABSTRACT:
A defoaming agent for cementitious compositions is provided, which has an excellent defoaming performance and does not segregate when mixed with a high performance AE water-reducing agent to form a single admixture or when diluted in water at the desired concentration, and which has excellent long term storage properties. The defoaming agent for cementitious compositions is obtained by mixing at least a polyethylene oxide derivative and a nonionic defoaming agent wherein the polyethylene oxide derivative has at one end a hydrophobic group with a branched structure and/or an unsaturated bond and at the other end an anionic group.

REFERENCES:
patent: 5661206 (1997-08-01), Tanaka et al.
patent: 2006/0124034 (2006-06-01), Okazawa et al.
patent: 0 640 384 (1995-03-01), None
patent: 0 640 384 (1995-03-01), None
patent: WO 01 42162 (2001-06-01), None

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