High strength pourable gypsum floor underlayments and methods of

Details High strength pourable gypsum floor underlayments and methods of High strength pourable gypsum floor underlayments and methods of

1993-03-12

1995-06-13

Green, Anthony

Coating processes

With post-treatment of coating or coating material

Heating or drying

106695, 106705, 106735, 106778, 106785, 106788, 527411, 52750, 427384, 428403, B05D 100, B32B 1300, C04B 1128

Patent

active

054240999

ABSTRACT:
The invention relates to a gypsum-based cementitious composition capable of upon mixing with fine aggregate in a weight ratio to said gypsum-based cementitious composition of from about 1.25:1 to 2.5:1; and sufficient water to provide a pumpable, self-leveling wet gypsum-based cementitious composition having a flowability such that the wet gypsum-based cementitious composition completely self-levels to produce a topographically smooth surface without floating or finishing, providing, upon hardening, a sub-floor resistant to delamination from its substrate having a dust-free surface and compressive strength in the range of about 2500 to 6000 psi. The invention further relates to methods for making floor underlayments using these compositions, and for making the compositions.

REFERENCES:
patent: 1923370 (1933-08-01), Hansen
patent: 4067939 (1978-01-01), Cowe et al.
patent: 4075374 (1978-02-01), Jorgenson et al.
patent: 4102697 (1978-07-01), Fukuba et al.
patent: 4159912 (1979-07-01), Jorgenson
patent: 4190455 (1980-02-01), Bijen et al.
patent: 4202857 (1980-05-01), Lowe
patent: 4444925 (1984-04-01), Feldman

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