Self supporting cement专利检索-地聚合物水泥地质聚合物聚合物和橡胶专利检索查询-专利查询网

Self supporting cement

阅读：657发布：2022-03-08

专利汇可以提供Self supporting cement专利检索，专利查询，专利分析的服务。并且A self supporting cement comprising inorganic cementitious material as the major constituent, a setting agent therefor and a minor, binding amount of an anhydrous vinyl ether polymer. In particular, poly(methyl vinyl ether-maleic anhydride) is mixed with an aluminum oxide and the mixture combined with gypsum containing silica, as a filler, to provide a composition which upon the addition of water sets quickly with little or no shrinkage.，下面是Self supporting cement专利的具体信息内容。

权利要求

1. A SELF SUPPORTING CEMENT, COMPRISING: GYPSUM CEMENT AS THE MAJOR CONSTITUENT; FROM ABOUT 0.1 PART TO ABOUT 12 PARTS BY WEIGHT OF A SETTING AGENT, FOR SPEEDING THE SET OF SAID GYPSUM CEMENT, PER 100 PARTS BY WEIGHT OF SAID GYPSUM CEMENT, SAID SETTING AGENT BEING SELECTED FROM THE GROUP CONSISTING OF ALUMINUM OXIDE, ALUMINUM SULFATE, MAGNESIUM SULFATE, AMMONIUM CHLORIDE, CALCIUM CHLORIDE, SODIUM SULFITE, POTASSIUM SULFATE, SODIUM HYDROXIDE, SODIUM SULFITE, POTASSIUM SULFITE AND POTASSIUM HYDROXIDE; AND FROM ABOUT 0.1 PART TO ABOUT 1.5 PARTS BY WEIGHT OF AN ANHYDROUS VINYL ETHER POLYMER PER 100 PARTS BY WEIGHT OF SAID GYPSUM CEMENT.

2. The cement of claim 1 including silica as a filler therefor.

3. The cement of claim 1 in which said vinyl ether polymer is poly(methyl vinyl ether-maleic anhydride).

4. The cement of claim 1 in which said setting agent comprises aluminum oxide.

5. The cement of claim 1 having the formulation in parts by weight:

6. The cement of claim 1 having the formulation, in parts by weight

7. The cement of claim 6 in which said setting agent comprises aluminum oxide.

8. The cement of claim 1 having the formulation, in parts by weight

9. The cement of claim 8 in which said aluminum oxide is present in 6 parts by weight.

10. A method for making a self supporting cement having gypsum cement as its major constituent, comprising: mixing from about 0.1 part to about 12 parts by weight of a setting agent for said gypsum cement with from about 0.1 part to about 1.5 parts by weight of an anhydrous vinyl ether polymer to form a substantially uniform mixture thereof, said setting agent being selected from the group consisting of aluminum oxide, aluminum sulfate, magnesium sulfate, ammonium chloride, calcium chloride, sodium chloride, sodium sulfate, sodium hydroxide, sodium sulfite, potassium sulfite and potassium hydroxide; and then combining said mixture with 100 parts by weight of said gypsum cement and mixing to form a substantially uniform combination thereof.

11. The method of claim 10 including the step of mixing silica with said gypsum cement prior to formation of said combination.

12. The method of claim 10 in which about 2-12 parts of said setting agent and about 0.1-1.5 parts of anhydrous vinyl ether polymer are mixed together and then combined with about 100 parts of gypsum as said gypsum cement.

13. The method of claim 12 in which said anhydrous vinyl ether polymer is poly(methyl vinyl ether-maleic anhydride).

14. The method of claim 12 in which said setting agent comprises aluminum oxide.

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