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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0415931 (2009-03-31) |
등록번호 | US-8329308 (2012-12-11) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 1 인용 특허 : 398 |
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 t
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.
1. A method of preparing a cementitious article comprising: (a) preparing a cementitious slurry, wherein the cementitious slurry comprises: (i) cementitious material present in an amount of at least about 50% by weight of the cementitious slurry;(ii) polyvinyl acetate or polyvinyl alcohol polymer or
1. A method of preparing a cementitious article comprising: (a) preparing a cementitious slurry, wherein the cementitious slurry comprises: (i) cementitious material present in an amount of at least about 50% by weight of the cementitious slurry;(ii) polyvinyl acetate or polyvinyl alcohol polymer or copolymer present in an amount of from about 0.1% to about 2% by weight of the cementitious slurry;(iii) boric acid present in an amount of from about 0.1% to about 1% by weight of the cementitious slurry; and(iv) monobasic phosphate present in an amount of from about 0.1% to about 1% by weight of the cementitious slurry;(b) depositing the cementitious slurry onto an advancing sheet of facer material; and(c) allowing the slurry to set. 2. The method of claim 1, wherein the facer material comprises glass fiber, polymer fiber, mineral fiber, organic fiber, or a combination thereof. 3. A cementitious article comprising: (a) a cementitious component that (i) comprises a cementitious material, a polyvinyl acetate or polyvinyl alcohol polymer or copolymer, a monobasic phosphate, and optionally boric acid; (ii) is formed from a slurry that comprises a cementitious material, a polyvinyl acetate or polyvinyl alcohol polymer or copolymer, a monobasic phosphate, and optionally boric acid; or both (i) and (ii); 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 or polyvinyl alcohol polymer or copolymer, 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 or polyvinyl alcohol polymer or copolymer, monobasic phosphate, and boric acid in the central region of the component; and(c) at least one facer layer for supporting the component. 4. The cementitious article of claim 3, the facer layer comprising glass fiber, polymer fiber, mineral fiber, organic fiber, or a combination thereof. 5. The cementitious article of claim 4, further comprising at least one dense layer optionally comprising a polyvinyl acetate or polyvinyl alcohol polymer or copolymer, a monobasic phosphate, and optionally boric acid, wherein the dense layer is disposed between the component and the at least one facer layer. 6. A method of preparing a cementitious article comprising: (a) preparing a cementitious slurry, the cementitious slurry comprising cementitious material, a polyvinyl acetate or polyvinyl alcohol polymer or copolymer, a monobasic phosphate, about 0.1-0.5 wt. % boric acid, and water; and(b) allowing the slurry to set. 7. The method of claim 6, further comprising depositing the cementitious slurry on a facer layer for supporting the component, the facer layer comprising glass fiber, polymer fiber, mineral fiber, organic fiber, or a combination thereof. 8. A cementitious article comprising a cementitious component, wherein the cementitous component (i) comprises a cementitious material, a polyvinyl acetate or polyvinyl alcohol polymer or copolymer, a monobasic phosphate, and about 0.1-0.5 wt. % boric acid; (ii) is formed from a slurry that comprises a cementitious material, a polyvinyl acetate or polyvinyl alcohol polymer or copolymer, about 0.1-1 wt. % of a monobasic phosphate, and about 0.1-0.5 wt. % boric acid; or both (i) and (ii).
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