By-product gypsum fillers for mica-free joint compounds

Details By-product gypsum fillers for mica-free joint compounds By-product gypsum fillers for mica-free joint compounds

1976-03-04

1977-09-20

Robinson, Ellis

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

106109, 106110, 260 296PS, 260 4252, 423161, 423166, 423555, 428323, 428539, B32B 516, C04B 1100, C04B 1102

Patent

active

040498662

ABSTRACT:
A filler for a mica-free joint compound, comprising by-product gypsum having a mean particle size between about 11 and about 12 microns, a percentage by weight of particles smaller than 1 micron of between about 5 and about 6.5, and a packed dry bulk volume no greater than about 93 cc. per 100 grams.

REFERENCES:
patent: 2044942 (1936-06-01), Heckert
patent: 2177269 (1939-10-01), Sullivan
patent: 3262799 (1966-07-01), McCleary
patent: 3328121 (1967-06-01), Shull
patent: 3557029 (1971-01-01), Bergeron
patent: 3840638 (1974-10-01), Morita
patent: 3949047 (1976-04-01), Cherdron

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