Additive composition used in the preparation of low air pore, pl

Details Additive composition used in the preparation of low air pore, pl Additive composition used in the preparation of low air pore, pl

1979-05-21

1981-04-21

Hoke, V. P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 296T, 260 296NR, 106 90, 106 98, 106100, C04B 1326, C08K 336, C08L 8306

Patent

active

042631912

ABSTRACT:
An additive composition used in the preparation of low air pore, plastic-containing, hydraulically-setting binders consisting essentially of a mixture of (1) an aqueous copolymer dispersion having a solids content of between 30% and 65% by weight, a glass transition temperature of the solid copolymer of between -10.degree. C. and +40.degree. C., and a K-value of the solid copolymer of from 35 to 80, which aqueous copolymer dispersion being produced from monomer units of vinyl chloride, vinyl acetate and one or more additional copolymerizable monomers selected from the group consisting of ethylene, vinyl alkanoates having from 8 to 18 carbon atoms in the alkanoyl, and (meth)acrylic acid esters with alkanols having 3 to 8 carbon atoms, by free-radical polymerization in the presence of from 1.5% to 5% by weight of protective colloids and from 0 to 3% by weight of nonionic surface-active agents, both based on the dispersion, with (2) from 0.3% to 3% by weight, based on the mixture of a defoamer mixture consisting of

REFERENCES:
patent: 3377306 (1968-04-01), Hyde
patent: 3390109 (1968-06-01), Reverdin et al.
patent: 3756972 (1973-09-01), Kobayashi et al.
patent: 3833530 (1974-09-01), Wicht et al.

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