US4113594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(tetramethyleneterephthalate) crosslinked by irradiation
Assignee: Raychem Corp
•
Filing: 1977-12-01
•
Granted: 1978-09-12
•
Expires: 1997-12-01
Abstract
Abstract Crosslinking, e.g., by irradiation, of a polymer comprising poly(tetramethyleneterephthalate) is made possible by the addition of a member selected from the group consisting of triallyl cyanurate and N,N'-m-phenylenedimaleimide. The resulting crosslinked modified polymer may be rendered heat recoverable.
Inventors
- 👤 David Dolph Nyberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:31
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; C08G; C08G63/00; C08G63/91; C08G63/914; C08G63/916; C08J2367/00; C08J2367/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
56 words
A process for crosslinking poly(tetramethyleneterephthalate) comprising subjecting poly(tetramethyleneterephthalate) containing at least one part by weight of triallyl cyanurate per 100 parts by weight of polymer to irradiation with ionizing radiation to a dose of from about 2 to about 80 megarads and to a heating step wherein said heat may be applied during or after irradiation.
Claim 2
Dependent Claim
56 words
A process for crosslinking poly(tetramethyleneterephthalate) comprising subjecting poly(tetramethyleneterephthalate) containing at least one part by weight of triallyl cyanurate per 100 parts by weight of polymer to irradiation with ionizing radiation to a dose of from about 2 to about 80 megarads and to a heating step wherein said heat may be applied during or after irradiation.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein said heating is performed during irradiation.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein said heating is performed immediately after irradiation.
Claim 5
Dependent Claim
31 words
The process according to claim 1 wherein said triallyl cyanurate is present in an amount from about 1 to about 3 parts by weight per 100 parts by weight of poly(tetramethyleneterephthalate).
Claim 6
Dependent Claim
41 words
The process comprising admixing of poly(tetramethyleneterephthalate) and at least one part by weight of triallyl cyanurate per 100 parts by weight of polytetramethyleneterephthalate and exposing the mixture to a dose of ionizing radiation of from about 2 to about 80 megarads.
Claim 7
Dependent Claim
41 words
The process comprising admixing of poly(tetramethyleneterephthalate) and at least one part by weight of triallyl cyanurate per 100 parts by weight of polytetramethyleneterephthalate and exposing the mixture to a dose of ionizing radiation of from about 2 to about 80 megarads.
Claim 8
Dependent Claim
35 words
The process according to claim 5 wherein said triallyl cyanurate is present in the mixture in an amount of from about 1 to about 3 parts by weight per 100 parts by weight of poly(tetramethyleneterephthalate).
References Cited (Backward Citations)
US3729446A
Cited
US3770697A
Cited
US3784520A
Cited
US3723568A
Cited
US3968015A
Cited
US4073830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |