US3850650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of silicate foams
Assignee: Bayer AG
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Filing: 1972-12-26
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Granted: 1974-11-26
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Expires: 1992-12-26
Abstract
Abstract The present invention relates to a process for the production of a foam having a silicate skeleton which comprises mixing in aqueous solution a water soluble silicate, a hardener which liberates acid in water and a foaming agent. It is preferred to use as silicate solution a sodium waterglass solution, as hardeners those liberating CO2, carboxylic acids, sulfonic acids or mineral acids and as foaming agents optionally halogensubstituted alkanes and alkenes, and dialkyl ethers.
Inventors
- 👤 Bonin W Von
- 👤 U Nehen
- 👤 Gizycki U Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:54
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C01; C01B; C01B33/00; C01B33/20; C01B33/32; C04B24/00; C04B24/005; C10; C10M; C10M2201/00; C10M2201/10; C10M2201/105; C10N; C10N2040/00; C10N2040/20; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
132 words
PROCESS FOR THE PRODUCTION OF A FOAM HAVING A SILICATE SKELETON WHICH COMPRISES MIXING IN AQUEOUS SOLUTION A WATERSOLUBLE SILICATE, A HARDENER WHICH LIBERATES ACID IN WATER COMPRISING AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING PF CARBOXYLIC ACID ANHYDRIDES, CARBOXYLIC ACID CHLORIDES, CHLOROFORMIC ACID ESTERS AND SULFOCHLORIDES, AND AT LEAST ONE FOAMING AGENT SELECTED FROM THE GROUP CONSISTING OF ALKANES, ALKENES, HALOGEN-SUBSTITUTED ALKANES, HALOGEN-SUBSTITUTED ALKENES AND DIALKYL ETHERS, BASED ON THE MIXTURE THE SILICATE CONTENT BEING ABOUT 5 TO 50 PERCENT BY WEIGHT, THE CONTENT OF THE HARDENER BETWEEN ABOUT 0.01 AND 60 PERCENT BY WEIGHT AND THE CONTENT OF THE FOAMING AGENT BETWEEN ABOUT 0.01 AND 50 PERCENT BY WEIGHT, AND BRINGING THE MIXTTURE TO A TEMPERATURE ABOVE THE BOILING POINT OF THE FOAMING AGENT, WHEREBY SAID MIXTURE FOAMS.
Claim 2
Dependent Claim
132 words
PROCESS FOR THE PRODUCTION OF A FOAM HAVING A SILICATE SKELETON WHICH COMPRISES MIXING IN AQUEOUS SOLUTION A WATERSOLUBLE SILICATE, A HARDENER WHICH LIBERATES ACID IN WATER COMPRISING AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING PF CARBOXYLIC ACID ANHYDRIDES, CARBOXYLIC ACID CHLORIDES, CHLOROFORMIC ACID ESTERS AND SULFOCHLORIDES, AND AT LEAST ONE FOAMING AGENT SELECTED FROM THE GROUP CONSISTING OF ALKANES, ALKENES, HALOGEN-SUBSTITUTED ALKANES, HALOGEN-SUBSTITUTED ALKENES AND DIALKYL ETHERS, BASED ON THE MIXTURE THE SILICATE CONTENT BEING ABOUT 5 TO 50 PERCENT BY WEIGHT, THE CONTENT OF THE HARDENER BETWEEN ABOUT 0.01 AND 60 PERCENT BY WEIGHT AND THE CONTENT OF THE FOAMING AGENT BETWEEN ABOUT 0.01 AND 50 PERCENT BY WEIGHT, AND BRINGING THE MIXTTURE TO A TEMPERATURE ABOVE THE BOILING POINT OF THE FOAMING AGENT, WHEREBY SAID MIXTURE FOAMS.
Claim 3
Dependent Claim
17 words
Process according to claim 1, wherein said acid-liberating hardener comprises at least one compound of the formula
Claim 4
Dependent Claim
70 words
Process according to claim 1, wherein said acid-liberating hardener is a substance which, when added in the form of a 10 percent by weight mixture to a soda waterglass solution containing 0.5 percent by weight of Na-C14-alkyl sulfonate with a density of 1.36 (Na2O- content approximately 8.6 percent by weight, SiO2 - content approximately 25.4 percent by weight), causes this solution to gel in less than 15 minutes at 25*C.
Claim 5
Dependent Claim
26 words
Process according to claim 1, wherein said aqueous solution contains up to about 95 percent by weight of at least one inert organic or inorganic filler.
Claim 6
Dependent Claim
52 words
Process according to claiM 4, wherein said filler comprises at least one member selected from the group consisting of asbestos, sand, magnesium oxide, dolomite, chalk, talcum, kaolin, glass in foamed or fibrous form, carbon, polystyrene, polyvinyl chloride and polyethylene in foamed or unfoamed form, terephthalic acid polyester, polyacrylonitrile, polyamides, polypropylene and polyurethanes.
Claim 7
Dependent Claim
27 words
Process according to claim 1, wherein said water-soluble silicate is a sodium waterglass solution, said hardener is a chloroformic acid ester and said foaming agent is trichlorofluoromethane.
Claim 8
Dependent Claim
48 words
Process according to claim 6, wherein the silicate content of the mixture is about 20 to 40 percent by weight, the content of the hardener between about 5 and 20 percent by weight and the content of the foaming agent is about 0.5 to 10 percent by weight.
Claim 9
Dependent Claim
10 words
A silicate foam produced by the process of claim 1.
References Cited (Backward Citations)
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Cited
US3678144A
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US3715224A
Cited
US3661602A
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |