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US4307203A
Expired / Lapsed
US
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Process for the production of polyurethane silicate foams and resinous products utilizing aldehyde-broken down alkali metal cellulose silicate polymer
Assignee: Individual
•
Filing: 1981-03-26
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Granted: 1981-12-22
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Expires: 2001-03-26
Abstract
Abstract Organic polyisocyanates are reacted chemically with aldehyde-broken down alkali metal cellulose silicate polymers to produce polyurethane products.
Inventors
- 👤 David H. Blount
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:39
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6484
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
175 words
The process for the production of polyurethane silicate foam by the following steps: (a) mixing and reacting 1 to 99 parts by weight of aldehyde-broken down alkali metal cellulose silicate copolymer, which is produced by heating a mixture of 3 parts by weight of a cellulose-containing plant, 2 to 5 parts by weight of an alkali metal hydroxide and 1 to 2 parts by weight of an oxidated silicon compound to 150° to 220° C. while agitating for 5 to 60 minutes thereby producing a broken down alkali metal cellulose silicate polymer which is then reacted with an aldehyde in ratio of 2 parts by weight of the broken down alkali metal cellulose silicate polymer to 1 to 5 parts by weight the aldehyde to produce the aldehyde-broken down cellulose silicate copolymer, and 50 to 99 parts by weight of an organic polyisocyanate thereby producing an isocyanate-terminated polyurethane silicate prepolymer, (b) mixing and reacting up to 10% by weight of an initiator with the isocyanate terminated polyurethane silicate prepolymer thereby producing a polyurethane silicate foam.
Claim 2
Dependent Claim
175 words
The process for the production of polyurethane silicate foam by the following steps: (a) mixing and reacting 1 to 99 parts by weight of aldehyde-broken down alkali metal cellulose silicate copolymer, which is produced by heating a mixture of 3 parts by weight of a cellulose-containing plant, 2 to 5 parts by weight of an alkali metal hydroxide and 1 to 2 parts by weight of an oxidated silicon compound to 150° to 220° C. while agitating for 5 to 60 minutes thereby producing a broken down alkali metal cellulose silicate polymer which is then reacted with an aldehyde in ratio of 2 parts by weight of the broken down alkali metal cellulose silicate polymer to 1 to 5 parts by weight the aldehyde to produce the aldehyde-broken down cellulose silicate copolymer, and 50 to 99 parts by weight of an organic polyisocyanate thereby producing an isocyanate-terminated polyurethane silicate prepolymer, (b) mixing and reacting up to 10% by weight of an initiator with the isocyanate terminated polyurethane silicate prepolymer thereby producing a polyurethane silicate foam.
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein the organic polyisocyanate is selected from the group consisting of aliphatic, cycloaliphatic, araliphatic, aromatic and heterocyclic polyisocyanates and mixtures thereof.
Claim 4
Dependent Claim
28 words
The process of claim 1 wherein the organic polyisocyanate is selected from the group consisting of tolylene diisocyanate, the phosgenation product of an aniline-formaldehyde condensation and mixture thereof.
Claim 5
Dependent Claim
9 words
The product produced by the process of claim 1.
Claim 6
Dependent Claim
114 words
The process of claim 1 wherein 1 to 50 parts by weight of a polyol, up to 10% by weight of an initiator, up to 5% by weight of an emulsifier, up to 20% by weight of an initiator, up to 5% by weight of an emulsifier, up to 20% by weight of a foam stabilizer, and up to 50% by weight of a blowing agent, boiling within the range of from -25° to 80° C., percentage based on the weight of the reactants, are added to the aldehyde-broken down cellulose silicate copolymer in step (a) of claim 1 then mixed with the polyisocyanate and allowed to react thereby producing a polyurethane silicate foam.
Claim 7
Dependent Claim
9 words
The product produced by the process of claim 5.
Claim 8
Dependent Claim
110 words
The process of claim 1 wherein 1 to 50 parts by weight of a polyol, up to 10% by weight of an initiator, up to 5% by weight of an emulsifier, up to 50% by weight of a blowing agent, boiling within the range of from -25° to 80° C., and up to 200% by weight of a water-binding agent, percentage based on the weight of the reactants, are mixed with the aldehyde-broken down cellulose silicate copolymer and polyisocyanate in step (a) of claim 1 then allowed to react thereby producing a polyurethane silicate foam product; then the polyurethane foamed product is wet with water to cure the water-binding agent.
Claim 9
Dependent Claim
24 words
The process of claim 7 wherein the water-binding agent is selected from the group consisting of hydraulic cement, gypsum, burnt lime and synthetic anhydrite.
Claim 10
Dependent Claim
9 words
The product produced by the process of claim 7.
Claim 11
Dependent Claim
65 words
The process of claim 1 wherein an additional step is taken wherein an organic compound selected from the group consisting of monohydroxy alcohol, monocarboxylic acid, monophenol, monotheophenol, monothioalcohol and mixtures is added to the isocyanate-terminated polyurethane silicate prepolymer up to an amount equal to 30% by weight of the isocyanate-terminated polyurethane silicate prepolymer in step (b) of claim 1 thereby producing a polyurethane silicate foam.
Claim 12
Dependent Claim
9 words
The product produced by the process of claim 10.
Claim 13
Dependent Claim
97 words
The process of claim 1 wherein 1 to 50 parts by weight of a polyol, 1 to 5 parts by weight of an alkali metal silicate, selected from the group consisting of sodium silicate and potassium silicate, up to 50% by weight of a blowing agent, boiling within the range of from -25° to 80° C., up to 5% by weight of an emulsifier and up to 20% by weight of a foam stabilizer, percentages are based on the weight of the reactants are added in step (b) of claim 1, thereby producing a polyurethane silicate foam.
Claim 14
Dependent Claim
9 words
The product produced by the process of claim 12.
Claim 15
Dependent Claim
95 words
The process of claim 1 wherein 1 to 50 parts by weight of a polyol, 1 to 50 parts by weight of a curing agent, up to 50% by weight of a blowing agent, boiling within the range of from -25° to 80° C., up to 5% by weight of an emulsifier, up to 10% by weight of an initiator and up to 20% by weight of a foam stabilizer, percentage are based on the weight of the reactants are added and reacted in step (a) of claim 26 thereby producing a polyurethane silicate foam.
Claim 16
Dependent Claim
9 words
The product produced by the process of claim 14.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |