US4343731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resin composition and process for production
Assignee: General Electric Co
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Filing: 1980-12-29
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Granted: 1982-08-10
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Expires: 2000-12-29
Abstract
Abstract An epoxy resin composition capable of application at elevated solids levels is disclosed. The composition is produced by low temperature catalytic fusion of (a) a glycidyl ether of bisphenol A and (b) a glycidyl ether of bisphenol A containing a fusion catalyst with (c) tetrabromobisphenol A. This composition may be utilized to facilitate forming improved epoxy coatings and laminates.
Inventors
- 👤 Donald G. Pucci
- 👤 Ralph T. Everly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:00
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/066; C08G59/18; C08G59/20; C08G59/22; C08G59/226; C08G59/40; C08G59/62; C08G59/621
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
62 words
An epoxy resin composition comprising the fusion product of: (a) a diglycidyl ether of bisphenol A and (b) a diglycidyl ether of bisphenol A containing a fusion catalyst with (c) tetrabromobisphenol A, said glycidyl ethers (a) and (b) being in a weight ratio of from 2:1 to 2.5:1, respectively, said fusion product having an average molecular weight of between 500 and 700.
Claim 2
Dependent Claim
62 words
An epoxy resin composition comprising the fusion product of: (a) a diglycidyl ether of bisphenol A and (b) a diglycidyl ether of bisphenol A containing a fusion catalyst with (c) tetrabromobisphenol A, said glycidyl ethers (a) and (b) being in a weight ratio of from 2:1 to 2.5:1, respectively, said fusion product having an average molecular weight of between 500 and 700.
Claim 3
Dependent Claim
21 words
The composition of claim 1, wherein the fusion product contains from 30% to 100% reacted tetrabromobisphenol A units by total weight.
Claim 4
Dependent Claim
16 words
The composition of claim 1 wherein the resin composition additionally comprises solvent for the fusion product.
Claim 5
Dependent Claim
10 words
The composition of claim 3, wherein the solvent comprises methoxyethanol.
Claim 6
Dependent Claim
19 words
The composition of claim 3, which has a resin solids content of from 70 to 85% by total weight.
Claim 7
Dependent Claim
11 words
The composition of claim 5, which contains a resin curing agent.
Claim 8
Dependent Claim
76 words
A process for the production of the composition of claim 1, comprising forming a dispersion of fusion catalyst, tetrabromobisphenol A and glycidyl ethers (a) and (b), heating said dispersion to an elevated fusion temperature of not more than 120° C., holding said dispersion at said elevated temperature until solution occurs and the resultant fusion product of said resin reaches an average molecular weight of between 500 and 700, and cooling said dispersion to below 50° C.
Claim 9
Dependent Claim
20 words
The process of claim 7, wherein the elevated fusion temperature is within the range of from 100° to 120° C.
Claim 10
Dependent Claim
19 words
The process of claim 8, wherein the dispersion is held within said range for from 10 to 20 minutes.
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) | 1985-08-09 | 1986-02-08 | 1986-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-09 | 1990-02-08 | 1990-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-09 | 1994-02-08 | 1994-08-10 | $7700.00 | Window Closed / Lapsed |