IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0992302
(2001-11-19)
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발명자
/ 주소 |
- Yu, Qiang
- Liu, Qingxia
- Grussing, Jeffrey F.
- Moyer, Kevin W.
- Spencer, Richard
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출원인 / 주소 |
- United States Gypsum Company
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
36 인용 특허 :
116 |
초록
▼
A composition and method for treating a set gypsum-containing material are disclosed. The composition is formed from at least water at least one trimetaphosphate salt, at least one monobasic phosphate salt, and at least one acyclic polyphosphate salt having at least three phosphate units. The method
A composition and method for treating a set gypsum-containing material are disclosed. The composition is formed from at least water at least one trimetaphosphate salt, at least one monobasic phosphate salt, and at least one acyclic polyphosphate salt having at least three phosphate units. The method comprises applying to a set gypsum material at least two of the following inorganic phosphates: at least one monobasic phosphate salt, at least one trimetaphosphate salt, and at least one acyclic polyphosphate salt having at least three phosphate units. The method can be for inhibiting re-calcination of a set gypsum containing material, and/or for enhancing the strength, surface hardness, paintability, abrasion resistance, and/or water erosion resistance of a set gypsum-containing material. Also disclosed is a method of making a set gypsum-containing material.
대표청구항
▼
1. A method of treating a set gypsum-containing material comprising:applying to said set gypsum-containing material at least one member from each of the following types of inorganic phosphate salts: monobasic phosphate salts, trimetaphosphate salts, and acyclic polyphosphate salts having at least th
1. A method of treating a set gypsum-containing material comprising:applying to said set gypsum-containing material at least one member from each of the following types of inorganic phosphate salts: monobasic phosphate salts, trimetaphosphate salts, and acyclic polyphosphate salts having at least three phosphate units. 2. The method of claim 1, wherein the inorganic phosphate salts are applied in amounts sufficient to impart the set gypsum-containing material with an improvement, as compared with the untreated set gypsum-containing material; in at least one characteristic selected from the group consisting of strength, surface hardness, abrasion resistance, water erosion resistance, and combinations thereof. 3. The method of claim 1, wherein the trimetaphosphate salt is selected from the group consisting of sodium trimetaphosphate, potassium trimetaphosphate, calcium trimetaphosphate, sodium calcium trimetaphosphate, ammonium trimetaphosphate, lithium trimetaphosphate, and combinations thereof. 4. The method of claim 1, wherein a composition is formed from the inorganic phosphate salts, which is then applied to the set gypsum-containing material. 5. The method of claim 4, wherein the composition comprises water. 6. The method of claim 5, wherein the composition is applied by way of spraying, dipping, spin coating, brushing, rolling, or combinations thereof. 7. The method of claim 4, wherein the composition is further formed from a polymer selected from the group consisting of a water dispersible polymer, a water soluble polymer, and combinations thereof 8. The method of claim 1, further comprising applying to the set gypsum-containing material a polymer selected from the group consisting of a water dispersible polymer, a water soluble polymer, and combinations thereof. 9. The method of claim 8, wherein the polymer is selected from the group consisting of acrylic latex, rubber latex, guar gum, sulfonated polystyrene latex, polyvinyl alcohol, polyvinyl acetate, and blends or combinations thereof. 10. The method of claim 1, wherein the monobasic phosphate salt is selected from the group consisting of monoammonium phosphate, monosodium phosphate, monolithium phosphate, monopotassium phosphate, and combinations thereof. 11. The method of claim 1, wherein the acyclic polyphosphate salt is soluble in water. 12. The method of claim 11, wherein the acyclic polyphosphate salt is selected from the group consisting of sodium hexametaphosphate having 6 to about 27 repeating phosphate units, potassium hexametaphosphate having 6 to about 27 repeating phosphate units, ammonium hexametaphosphate having 6 to about 27 repeating phosphate units, and combinations thereof. 13. The method of claim 1, wherein the monobasic phosphate salt is monoammonium phosphate, and the acyclic polyphosphate salt is sodium hexametaphosphate having 6 to about 27 repeating phosphate units. 14. The method of claim 1, wherein the set gypsum-containing material comprises one or more fillers. 15. The method of claim 14, wherein the filler is selected from the group consisting of silica sand, hydrated lime, and blends or combinations thereof.
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