CEMENTITIOUS ARTICLE AND METHOD FOR PREPARING THE SAME
First Claim
1. A method of preparing a cementitious article comprising:
- (a) preparing a cementitious slurry, the cementitious slurry comprising cementitious material, a polyvinyl acetate type polymer, a monobasic phosphate, optionally boric acid, and water; and
(b) allowing the slurry to set.
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Abstract
A cementitious article and a method of making a cementitious article are disclosed. The cementitious article comprises a cementitious component that comprises a polyvinyl acetate type polymer, a monobasic phosphate, and optionally boric acid. Cementitious articles, such as board, are prepared such that the polyvinyl acetate type polymer, the monobasic phosphate, and optionally boric acid can be present in the cementitious core, and/or in dense layers if present. The concentration of the polyvinyl acetate type polymer, monobasic phosphate, and optionally boric acid in the cementitious article can increase from a central region A to peripheral regions B and C, respectively. In some embodiments, the polyvinyl acetate type polymer is a polyvinyl alcohol and the monobasic phosphate is monoammonium phosphate.
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Citations
24 Claims
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1. A method of preparing a cementitious article comprising:
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(a) preparing a cementitious slurry, the cementitious slurry comprising cementitious material, a polyvinyl acetate type polymer, a monobasic phosphate, optionally boric acid, and water; and (b) allowing the slurry to set. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A cementitious article comprising:
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(a) a cementitious component comprising a cementitious material, a polyvinyl acetate type polymer, a monobasic phosphate, and optionally boric acid; and (b) a first surface of the component, a second surface of the component, and a central region of the component, overlapping a central axis, halfway between the first surface and the second surface;
wherein the total concentration of the polyvinyl acetate type polymer, monobasic phosphate, and optionally boric acid, in one or both regions in the component adjacent the first and second surfaces, respectively, is greater than the total concentration of the polyvinyl acetate type polymer, monobasic phosphate, and boric acid in the central region of the component. - View Dependent Claims (16, 17)
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18. A cementitious article comprising:
a cementitious component comprising a cementitious material, a polyvinyl acetate type polymer, and a monobasic phosphate, and optionally boric acid. - View Dependent Claims (19, 20, 21, 22, 23, 24)
Specification