Plaster consistency reducer
AssigneeUnited States Gypsum Company
InventorsRobert G. Lange, Harley L. Schlotthauer
Life of this patent
Estimating the term…
Abstract
An additive for reducing the amount of water necessary in forming a pourable aqueous calcined gypsum slurry, the additive comprising a high potassium salt of a condensation product of naphthalene and sulfonic acid having a molecular weight between about 300 and 3,000. Aqueous plaster slurries containing the additive are pourable, moldable and castable with much less excess water than ordinarily required, resulting in dried cast products of increased strength and other physical property benefits.
Claims4
A plaster consistency reducing agent for reducing the amount of water required to be mixed with a dry plaster composition to form a pourable aqueous slurry consisting essentially of a potassium salt of naphthalene sulfonic acid condensate having a molecular weight between about 300 and 3,000, the potassium being present in an amount of about 0.10% to about 30% by weight expressed as K.sub.2 O, by weight of the condensate.
Dependencies are inferred from the claim text.