Pressure compacting of settable plaster compositions

Details Pressure compacting of settable plaster compositions Pressure compacting of settable plaster compositions

1980-10-23

1982-07-20

Pertilla, Theodore E.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

52596, 106109, 106110, 106111, 106116, 264333, 524 5, 524 6, C08L 6124, C04B 1114

Patent

active

043405215

ABSTRACT:
A settable molding composition comprising a mix of synthetic plaster with an extraneous water source, including a "wet" synthetic gypsum or a mixture of same and free water, is readily pressure compacted or molded into a plurality of useful shaped articles, e.g., strong, modular building materials. The plaster can comprise from about 30% to about 99% by weight of the mix and has a Blaine surface area ranging between 2,500 and 7,000 cm.sup.2 /g, with the amount of water in the mix from the water source being in excess of that amount stoichiometrically required for ultimate complete setting of the mix, said excess of water being in an amount no greater than 15% of the total weight of said mix. The resulting shaped articles are effectively set, even in the absence of any drying step.

REFERENCES:
patent: 1652162 (1927-12-01), Brookby
patent: 1703097 (1929-02-01), Chassevent
patent: 3198858 (1965-08-01), Hansen
patent: 3666581 (1972-05-01), Lane
patent: 3809566 (1974-05-01), Revord

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