Process of reaction organic polyisocyanate with alkali metal silicate solution |
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| 申请号 | US3607794D | 申请日 | 1968-05-03 | 公开(公告)号 | US3607794A | 公开(公告)日 | 1971-09-21 |
| 申请人 | CONTEKI DEV LTD; | 发明人 | ABBOTSON WILLIAM; MACNAIR JOHN MILES; WALLACE FREDERICK JAMES; HANCOX PETER JOHN; | ||||
| 摘要 | Siliceous products may be made by direct reaction between an alkali metal silicate and an organic isocyanate or isothiocyanate. By varying the proportions, reaction conditions and ingredients used, products varying from light cellular foams, to mastics and high-density solids may be obtained. | ||||||
| 权利要求 | 2. A process according to claim 1 wherein the said polyisocyanate is selected from the group consisting of p,p''-diphenylmethane diisocyanate and tolylene diisocyanate. 3. A process according to claim 1 wherein the alkali metal silicate is sodium silicate of which the Na0:Si02 ratio of the sodium silicate is within the range of about 1.6:1 to about 3.3: 4. A process according to claim 3 wherein the Na20:Si02 ratio is within the range of about 2.0:1 to about 2.3:1. 5. A process according to claim 1 wherein the silicate is employed in excess over the quantity stoichiometrically necessary to react with said polyisocyanate. 6. A process according to claim 1 wherein the silicate is sodium silicate with a Na20:Si02 ratio in the range of about 2.0:1 to about 2,3:1, the isocyanate is p,p''-diphenylmethane diisocyanate having about a 90 percent purity and the weight of ratio of silicate to isocyanate is in the range of about 1:7.75 to about 3:1. 7. A process according to claim 1 wherein the reaction is effected in the presence of a tertary amine catalyst. 8. A process according to claim 1 wherein the reaction is effected in the presence of a foaming agent. 9. A process according to claim 1 wherein a foam stabilizing agent is included in the reaction mixture. 10. A process according to claim 1 wherein the particulate and fibrous materials are refractory materials. |
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