US4072637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of polyurethane resins and foams utilizing silico-formic acid
Assignee: Individual
•
Filing: 1975-07-25
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Granted: 1978-02-07
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Expires: 1995-07-25
Abstract
Abstract Silico-formic acid is reacted with a suitable isocyanate to produce an isocyanate-silico-formate resins of the type generally referred to as a polyurethane resin. An activator, such as water, may be mixed with the resin to cause foaming and/or cross linking of the polymer.
Inventors
- 👤 David H. Blount
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:48
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3893; C08G18/3895; C01; C01B; C01B33/00; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
64 words
A process for the production of isocyanate-silico-formate compositions which comprises the steps of: (a) providing about 1 mol of silico-formic acid; (b) mixing therewith from about 0.5 to about 2 mols of an organic diisocyanate compound; (c) maintaining said mixture at a temperature of from about 20° C to about 60° C; and (d) agitating said mixture until a smooth, creamy appearance is obtained.
Claim 2
Dependent Claim
64 words
A process for the production of isocyanate-silico-formate compositions which comprises the steps of: (a) providing about 1 mol of silico-formic acid; (b) mixing therewith from about 0.5 to about 2 mols of an organic diisocyanate compound; (c) maintaining said mixture at a temperature of from about 20° C to about 60° C; and (d) agitating said mixture until a smooth, creamy appearance is obtained.
Claim 3
Dependent Claim
51 words
The process according to claim 1, including the further steps of adding a foaming agent to said mixture after step (d) and heating said mixture to a temperature of from about 90° C to about 150° C until said mixture expands in volume at least 4 times, forming a self-sustaining foam.
Claim 4
Dependent Claim
26 words
The process according to claim 1 wherein said diisocyanate compound is selected from the group consisting of toluene-2,4-diisocyanate; toluene-2,6-diisocyanate; diphenylmethane-4,4'-diisocyanate; naphthalene-1,5-diisocyanate; hexamethylene diisocyanate and mixtures thereof.
Claim 5
Dependent Claim
43 words
The process according to claim 3 wherein said diisocyanate compound is toluene diisocyanate with an isomer ratio of from about 60 to 85 weight percent of the 2, 4 isomer and from about 40 to 15 weight percent of the 2, 6 isomer.
Claim 6
Dependent Claim
37 words
The process according to claim 2 wherein said foaming agent is selected from the group consisting of water, sodium dioctyl sulfosuccinate, cobalt naphthenate, zinc stearate, and mixtures thereof, and is added after step (d) of claim 1.
Claim 7
Dependent Claim
16 words
The process according to claim 5 wherein said foaming agent comprises about 1-3 weight percent water.
Claim 8
Dependent Claim
34 words
The process according to claim 1 wherein a weight of an organic polyhydroxy compound, about equal to the weight of silico-formic acid used, is added to said mixture after step (d) of claim 1.
Claim 9
Dependent Claim
61 words
The process according to claim 7 wherein said polyhydroxy compound is selected from the group consisting of castor oil, triethylene glycol, diethylene glycol, glycerol, trimethylol propane, butynediol, polyethylene glycol, polypropylene glycol, monoglycerides of hard fatty acids, butanediol-1,4, polybutylene glycol, pentamethylene glycol, hexamethylene glycol, tripentaerythritol, polyesters containing 2 mols linoleic acid per mol diethylene, ethylene glycol, propylene glycol, Bisphenol-A and mixtures thereof.
Claim 10
Dependent Claim
37 words
The process according to claim 1 comprising the additional step of mixing from about 1 to 2 mols of an organic polyhydroxy compound with said organic diisocyanate prior to mixing said diisocyanate compound with said silico-formic acid.
Claim 11
Dependent Claim
10 words
The products as produced by the process of claim 1.
Claim 12
Dependent Claim
6 words
The product produced in claim 2.
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) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |