Styrene-butadiene interpolymer latex based cement additives cont

Details Styrene-butadiene interpolymer latex based cement additives cont Styrene-butadiene interpolymer latex based cement additives cont

1977-12-27

1979-04-24

Welsh, M. J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 297S, C08L 908

Patent

active

041511506

ABSTRACT:
Cement compositions having improved strength and enhanced adhesion to siliceous substrates are obtained by admixing Portland cement with a cement additive comprising (1) a styrene-butadiene interpolymeric latex containing up to about 60 parts by weight of interpolymer solids, said latex being present in an amount sufficient to provide from about 5 to about 25 parts by weight of latex polymer solids based on the weight of cement and (2) from about 0.05 to about 3 parts by weight of latex solids of a silane of the formula ZSi(OR').sub.3 wherein Z is a member selected from the group consisting of hydrocarbon groups and substituted hydrocarbon groups in which the substituent is bonded to the silicon atom through at least one carbon atom, and R' is selected from the group consisting of alkyl radicals of from 1 to 3 carbon atoms, --CH.sub.2 CH.sub.2 OR" and --CH.sub.2 CHOH where R" is an aliphatic hydrocarbon radical of 1 to 3 inclusive carbon atoms.

REFERENCES:
patent: RE28722 (1976-02-01), Sanders
patent: 2813085 (1957-11-01), MacMullen et al.
patent: 2898221 (1959-08-01), Carlson
patent: 3043790 (1962-07-01), Sanders
patent: 3190762 (1965-06-01), Carlson et al.
patent: 3240736 (1966-03-01), Beckwith
patent: 3354169 (1967-11-01), Shafer et al.

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