Gypsum plaster
First Claim
Patent Images
1. An extruded, stamped, pressed, rolled or injection molded gypsum plaster product made from a paste comprising:
- α
gypsum plaster;
water in an amount of from 70% to 170% of the stoichiometric amount;
a binder; and
a clay or another rheology modifier functionally equivalent to a clay, the product being substantially free of macro defects.
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Abstract
An extrudable gypsum plaster paste is disclosed comprising: α gypsum plaster, water in a substantially stoichiometric amount; a binder; and a clay or another rheology modifier functionally equivalent to a clay. Such pastes can have a yield stress sufficient to make the paste self supporting. The invention also provides a method for making an extrudable gypsum plaster paste comprising: mixing α gypsum plaster, water in a substantially stoichiometric amount and a binder; and mixing into that mixture a clay or other rheology modifier functionally equivalent to a clay.
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Citations
35 Claims
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1. An extruded, stamped, pressed, rolled or injection molded gypsum plaster product made from a paste comprising:
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α
gypsum plaster;
water in an amount of from 70% to 170% of the stoichiometric amount;
a binder; and
a clay or another rheology modifier functionally equivalent to a clay, the product being substantially free of macro defects. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 20, 21, 22, 23, 26, 27, 31, 32, 33, 34)
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2. An extruded, stamped, pressed, rolled or injection molded gypsum plaster product made from a paste comprising:
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α
gypsum plaster;
water in an amount of from 70% to 170% of the stoichiometric amount, a binder; and
a rheology modifier such that the paste has a yield stress sufficient to make the paste self supporting, the product being substantially free of macro defects. - View Dependent Claims (3, 18, 19, 29, 30, 35)
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24. A gypsum plaster paste comprising:
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α
gypsum plaster;
water in an amount of from 70% to 170% of the stoichiometric amount;
a binder; and
a rheology modifier such that the paste has a yield stress sufficient to make the paste self supporting, the product being substantially free of macro defects. - View Dependent Claims (25)
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28. An extruded, stamped, pressed, rolled or injection molded gypsum plaster product made from a paste comprising:
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α
gypsum plaster;
water in an amount of from 70% to 170% of the stoichiometric amount;
a binder; and
a clay or another rheology modifier functionally equivalent to a clay, the product being substantially free of macro defects wherein said paste is made by mixing α
gypsum plaster, water in an amount of from 70% to 170% of the stoichiometric amount and a binder;
mixing into that mixture a rheology modifier such that the paste has a yield stress sufficient to make the paste self supporting;
working the paste into a plastic condition; and
extruding, stamping, pressing or injection molding the paste to form a shaped product.
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Specification