Method of preparing gypsum products

Details Method of preparing gypsum products Method of preparing gypsum products

1995-06-06

1996-11-19

Green, Anthony

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

106674, 106772, 106778, 106779, 106783, 106785, C04B 3800

Patent

active

055758444

ABSTRACT:
The invention provides a method of making gypsum products such as plasterboard from foamed gypsum plaster slurry. The method uses a first mixing chamber 10 containing a high speed rotor 14 and inlets 18, 19 for gypsum plaster and water. The initial dispersion of gypsum plaster and water foamed in the first chamber passes directly and continuously into a second chamber 25 containing a low speed rotor 29. Preformed foam is introduced into the second chamber through an inlet 33, and the foamed slurry product leaves the second chamber through an outlet 34, to be formed into plasterboard.

REFERENCES:
patent: 1660243 (1928-02-01), Thomson
patent: 4156615 (1979-05-01), Cukier
patent: 4523954 (1985-06-01), Pichat et al.
patent: 5158612 (1992-10-01), Savoly et al.
patent: 5173364 (1992-12-01), Geeraert
patent: 5240639 (1993-08-01), Diez et al.

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