Setting retardatives for compositions with a gypsum plaster base

Details Setting retardatives for compositions with a gypsum plaster base Setting retardatives for compositions with a gypsum plaster base

1979-11-06

1981-10-06

Straub, Gary P.

Compositions: coating or plastic

Coating or plastic compositions

Proteinaceous material containing

106116, 106315, C04B 1300, C04B 4300, E04C 200

Patent

active

042933447

ABSTRACT:
A plaster composition is disclosed having a long setting time, which composition comprises a gypsum-based plaster and an effective amount of a setting retarding agent comprising a polymer having a molecular weight of less than 1000 of the formula: ##STR1## wherein R.sub.1 is hydrogen or methyl,

REFERENCES:
patent: 2868752 (1959-01-01), Frazier
patent: 3121702 (1964-02-01), Sherr et al.
patent: 3256223 (1966-06-01), Heijmer
patent: 4157264 (1979-06-01), Kennedy-Skipton
Transactions British Ceramic Society, vol. 69, Mar. 70 #2.
Sheer, A. E., Plaster Compositions Industrial, Eng. Chem. Prod. R & D, vol. 8, No. 2, 1969, p. 193.

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