Preparation of gypsum compositions

Details Preparation of gypsum compositions Preparation of gypsum compositions

2006-07-04

2006-07-04

Harlan, Robert D. (Department: 1713)

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

C106S778000, C052S443000, C052S449000

Reexamination Certificate

active

07070648

ABSTRACT:
A gypsum composition containing a sulfonate-containing comb-branched copolymer is disclosed. The sulfonate-containing comb-branched copolymer comprises recurring units of a polyether macromonomer, an acrylic monomer, and a sulfonate monomer. The sulfonate-containing comb-branched copolymer not only increases the fluidity of gypsum slurry but also has reduced retardation on the gypsum setting.

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