Pourable compositions
AssigneeUnited States Gypsum Company
InventorsMichael Intorcia, Dennis Lettkeman
Life of this patent
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Abstract
The invention provides a pourable composition comprising calcium sulfate hemihydrate; optionally, cement; one or more anionic surfactants selected from alkyl anionic surfactants, alkyl ether anionic surfactants, alkyl aryl anionic surfactants, and combinations thereof; one or more set accelerator additives; and water.
Claims16
A poured article formed using a pourable composition comprising between about 30 weight percent (wt. %) to 49 wt. % calcium sulfate hemihydrate;
- optionally, between about 0 wt. % to about 10.0 wt. % cement;
- between about 0.025 wt. % to about 0.65 wt. % of one or more anionic surfactants selected from alkyl anionic surfactants, alkyl ether anionic surfactants, alkyl aryl anionic surfactants, and combinations thereof;
- and between 40 wt. % and 60 wt. % water wherein the formed article has a compressive strength between 17-100 psi and a hardness value between 10-60 Asker C units.
A method of making a poured article comprising pouring a composition comprising between about 30 wt. % to 49 wt. % calcium sulfate hemihydrate;
- optionally, between about 0 wt. % to about 10.0 wt. % cement;
- between about 0.025 wt. % to about 0.65 wt. % of one or more anionic surfactants selected from alkyl anionic surfactants, alkyl ether anionic surfactants, alkyl aryl anionic surfactants, and combinations thereof;
- and between 40 wt. % and 60 wt. % water into a cast, a mold, or on to a surface;
- and allowing the poured composition to set, thereby making the poured article wherein the poured article has a compressive strength between 17-100 psi and a hardness value between 10-60 Asker C units.
Dependencies are inferred from the claim text.