US3607794A
Expired / Lapsed
US
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Process of reaction organic polyisocyanate with alkali metal silicate solution
Assignee: Conteki Development Ltd
•
Filing: 1968-05-03
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Granted: 1971-09-21
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Expires: 1988-05-03
Abstract
Abstract 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.
Inventors
- 👤 William Abbotson
- 👤 John Miles Macnair
- 👤 Frederick James Wallace
- 👤 Peter John Hancox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:49
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/003; C04B28/24; C04B28/26; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/302; C08G18/38; C08G18/3893; C08G18/3895
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
22 words
A process according to claim 1 wherein the said polyisocyanate is selected from the group consisting of p,p''-diphenylmethane diisocyanate and tolylene diisocyanate.
Claim 2
Dependent Claim
33 words
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:
Claim 3
Dependent Claim
20 words
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.
Claim 4
Dependent Claim
23 words
A process according to claim 1 wherein the silicate is employed in excess over the quantity stoichiometrically necessary to react with said polyisocyanate.
Claim 5
Dependent Claim
55 words
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.
Claim 6
Dependent Claim
19 words
A process according to claim 1 wherein the reaction is effected in the presence of a tertary amine catalyst.
Claim 7
Dependent Claim
18 words
A process according to claim 1 wherein the reaction is effected in the presence of a foaming agent.
Claim 8
Dependent Claim
17 words
A process according to claim 1 wherein a foam stabilizing agent is included in the reaction mixture.
Claim 9
Dependent Claim
15 words
A process according to claim 1 wherein the particulate and fibrous materials are refractory materials.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |