Phillip P Sanders

US Patent:

RE287229, Feb 24, 1976

Filed:

Jan 11, 1974

Appl. No.:

5/432701

Inventors:

Phillip F. Sanders - Glen Mills PA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C04B 735
C08K 554
C08L 908

US Classification:

260 297S

Abstract:

1. A cement. Iadd. mortar. Iaddend. composition comprising a mixture of Portland cement, mineral aggregate, about 5%-25% based on the weight of said Portland cement of styrene-butadiene-1,3 copolymer having a styrene to butadiene weight ratio of about 30:70 to 70:30, water in amount not in excess of about 40% based on the weight of said Portland cement, and, based on the weight of said copolymer, (a) 2-10% of non-ionic surfactant, (b) 1-7. 5% of anionic surfactant, at least 15% of which is a sodium alkyl sulfate in which the alkyl group contains 9-17 carbon atoms, and (c). [. 1-5% of. ]. polyorganosiloxane fluid surfactant,. Iadd. in an amount equal to about 2. 5% of a polyorganosiloxane emulsion containing 29% of the polyorganosiloxane. Iaddend. the sum of (a) and (b) not exceeding about 14% by weight of said copolymer and the weight ratio of (a) to (b) being within the range of about 0. 7:1 to 10:1.