Additives for cement

Details Additives for cement Additives for cement

1988-05-13

1990-08-07

Bell, Mark L.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

524 5, 52623823, 526271, 106823, 106724, 106728, 106802, 106810, C08F21014

Patent

active

049469045

ABSTRACT:
An additive for cement comprising, as the effective component, a copolymer of a polyoxyalkylene derivative represented by following formula (1) and maleic anhydride, a hydrolyzed product of the copolymer, or a salt of the hydrolyzed product; ##STR1## wherein Z represents a residue of a compound having a hydroxy group, said compound having from 2 to 8 carbon atoms; AO represents an oxyalkylene group having from 2 to 18 carbon atoms; X represents an unsaturated hydrocarbon group having from 2 to 5 carbon atoms or an unsaturated acyl group having from 2 to 5 carbon atoms; R represents hydrocarbon group having from 1 to 40 carbon atoms; a represents 0 to 1,000; b represents 0 to 1,000; c represents 0 to 1,000; l represents 1 to 7, m represents 0 to 2; and n represents 1 to 7; l+m+n=2 to 8, m/(l+n).ltoreq.1/2, and al+bm+cn.gtoreq.1.

REFERENCES:
patent: 3563930 (1971-02-01), Stram
patent: 4547223 (1985-10-01), Goto et al.
patent: 4586960 (1986-05-01), Iizuka et al.
patent: 4587283 (1986-05-01), Hille et al.
patent: 4655838 (1987-04-01), Koga et al.
patent: 4662942 (1987-05-01), Koga et al.
patent: 4800220 (1989-01-01), Ribba

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