Adhesive bonding and miscellaneous chemical manufacture – Methods – Plaster board making
Patent
1977-06-06
1979-10-02
Powell, William A.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Plaster board making
106114, 106315, B32B 1300
Patent
active
041697472
ABSTRACT:
A composition for accelerating the setting of an aqueous calcined gypsum slurry, the composition comprising finely ground calcium sulfate dihydrate and a lignosulfonate. The composition, when added to an aqueous calcined gypsum slurry, accelerates the setting process and shortens the set time period as determined by the temperature rise set test procedure. The composition is useful for making gypsum wallboard.
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Annes Erle C.
Arnold Billy G.
Daniel Thell D.
De Rooy Felix J.
Kurlandsky Samuel
Ohlson Glenn W.
Powell William A.
Roberts Kenneth E.
Robinson Robert H.
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