US3716598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardenable epoxy resin compositions
Assignee: General Electric Co
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Filing: 1971-10-28
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Granted: 1973-02-13
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Expires: 1991-10-28
Abstract
Abstract The cure rate of 1,2-epoxy resins containing more than one epoxy group per molecule can be controlled over a wide range of times by a catalytic hardener comprising from 0.05 to 10 percent based on the weight of the epoxy resin of a bis(triorganotin) oxide and from 0.1 to 15 percent by weight of the epoxy resin of a phenolic accelerator.
Inventors
- 👤 M Markovitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:44
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
A hardenable epoxy resin composition comprising an epoxy resin containing 1,2-epoxy groups and more than 1 epoxy group per molecule, from about 0.05 to 10 percent by weight of said epoxy resin of bis(triorganotin) oxide having the formula (R1)3Sn-O-Sn(R2)3 in which R1 and R2 are the same or different alkyl, cycloalkyl, aryl or alkaryl groups as a catalytic hardener for said epoxy resin, and from about 0.1 to 15 percent by weight of said epoxy resin of a phenolic accelerator.
Claim 2
Dependent Claim
80 words
A hardenable epoxy resin composition comprising an epoxy resin containing 1,2-epoxy groups and more than 1 epoxy group per molecule, from about 0.05 to 10 percent by weight of said epoxy resin of bis(triorganotin) oxide having the formula (R1)3Sn-O-Sn(R2)3 in which R1 and R2 are the same or different alkyl, cycloalkyl, aryl or alkaryl groups as a catalytic hardener for said epoxy resin, and from about 0.1 to 15 percent by weight of said epoxy resin of a phenolic accelerator.
Claim 3
Dependent Claim
16 words
The hardenable epoxy resin composition of claim 1 in which the bis(triorganotin) oxide is bis(tri-n-butyltin) oxide.
Claim 4
Dependent Claim
24 words
The hardenable epoxy resin composition of claim 1 comprising from about 0.10 to 5.0 percent by weight of said epoxy resin of bis(triorganotin) oxide.
Claim 5
Dependent Claim
25 words
The hardenable epoxy resin composition of claim 1 comprising from about 0.5 to 5.0 percent by weight of said epoxy resin of a phenolic accelerator.
Claim 6
Dependent Claim
18 words
The hardenable epoxy resin composition of claim 1 in which the epoxy resin is a cycloaliphatic epoxy resin.
References Cited (Backward Citations)
US3622524A
Cited
US3637902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |