US4235974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of epoxy cellular solid products
Assignee: Individual
•
Filing: 1979-12-26
•
Granted: 1980-11-25
•
Expires: 1999-12-26
Abstract
Abstract Epoxy compounds will react chemically with an amine to produce an epoxy prepolymer that will produce a self-standing cellular solid product upon heating.
Inventors
- 👤 David H. Blount
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:05
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; C08J9/04; C08J9/06; C08J2363/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
128 words
The process for the production of epoxy cellular solid reaction products in a non-aqueous medium without the addition of a blowing agent, by the following steps: (a) adding about 1 to 3 parts by weight of an organic polyamine compound; (b) adding slowly 1 to 5 parts by weight of an epoxy compound to the polyamine compound while (c) agitating the mixture and keeping the temperature between 20° C. to 70° C. until the resulting chemical reaction is completed, thereby (d) producing an epoxy prepolymer; (e) admixing 0 to 2 parts by weight of a foam regulator to the epoxy prepolymer; (f) heating the epoxy prepolymer to a temperature of 80° C. to 100° C. until the mixture expands, thereby (g) producing an epoxy cellular solid reaction product.
Claim 2
Dependent Claim
128 words
The process for the production of epoxy cellular solid reaction products in a non-aqueous medium without the addition of a blowing agent, by the following steps: (a) adding about 1 to 3 parts by weight of an organic polyamine compound; (b) adding slowly 1 to 5 parts by weight of an epoxy compound to the polyamine compound while (c) agitating the mixture and keeping the temperature between 20° C. to 70° C. until the resulting chemical reaction is completed, thereby (d) producing an epoxy prepolymer; (e) admixing 0 to 2 parts by weight of a foam regulator to the epoxy prepolymer; (f) heating the epoxy prepolymer to a temperature of 80° C. to 100° C. until the mixture expands, thereby (g) producing an epoxy cellular solid reaction product.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein the epoxy compound is epichlorohydrin.
Claim 4
Dependent Claim
33 words
The process of claim 1 wherein the polyamine compound is selected from the group consisting of alkylenepolyamine, polyalkylenepolyamine, arylenepolyamine, polyamide polymers containing 2 or more free amine groups per molecule and mixtures thereof.
Claim 5
Dependent Claim
33 words
The process of claim 1 wherein the foam regulator is selected from the group consisting of metallic powder, metallic oxide powder, metallic hydroxide powder, manganese chloride, polyether siloxanes, ethyl cellulose and mixtures thereof.
Claim 6
Dependent Claim
39 words
The process of claim 1 wherein an additional step is taken wherein 1 to 8 parts by weight of an epoxy resin containing 2 or more reactive epoxy groups per molecule are added in step (e) of claim 1.
Claim 7
Dependent Claim
36 words
The process of claim 1 wherein an additional step is taken wherein 1 to 5 parts by weight of an epoxy compound, containing at least 1 epoxy group, are added in step (e) of claim 1.
Claim 8
Dependent Claim
59 words
The process of claim 1 wherein an additional step is taken wherein an alkali metal compound, selected from the group consisting of sodium hydroxide, potassium hydroxide, sodium carbonate and potassium carbonate, is added to step (a) of claim 1, in the proportion of 1 to 2 mols to each 2 mols of the halide present in the epoxy compound.
Claim 9
Dependent Claim
43 words
The process of claim 1 wherein an additional step is taken wherein an alkali metal polysulfide is added in step (a) of claim 1 in the proportion of 1 mol to 2 to 4 mols of the halide present in the epoxy compound.
Claim 10
Dependent Claim
62 words
The process of claim 1 wherein an additional step is taken wherein 1 to 2 parts by weight of a lignin compound, selected from the group consisting of sulfite lignin, sulfate lignin produced by the soda process (Kraft process), sodium salt of sulfite lignin, calcium sulfite lignin, partially desulfonated sulfite lignin and mixtures thereof, are added in step (a) of claim 1.
Claim 11
Dependent Claim
31 words
The process of claim 1 wherein an additional step is taken wherein 1 to 2 parts by weight of an organic polyhydroxy compound are added in step (a) of claim 1.
Claim 12
Dependent Claim
30 words
The process of claim 1 wherein an additional step is taken wherein 1 to 2 parts by weight of a vegetable oil are added in step (a) of claim 1.
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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) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |