US4073830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(tetramethyleneterephthalate) crosslinked by irradiation
Assignee: Raychem Corp
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Filing: 1976-07-02
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Granted: 1978-02-14
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Expires: 1996-07-02
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 D. Nyberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:40
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; B; B29; B29C; B29C61/00; B29C61/003; C08G; C08G63/00; C08G63/91; C08G63/914; C08G63/916; B29K; B29K2067/00; C08J2367/00; C08J2367/02; Y; Y10; Y10S; Y10S174/00; Y10S174/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
31 words
A composition comprising a blend of poly(tetramethyleneterephthalate) and a block copolymer of polytetramethyleneether and poly(tetramethyleneterephthalate) said composition containing an effective crosslinking amount of a member selected from N,N'-m-phenylenedimaleimide and triallyl cyanurate.
Claim 2
Dependent Claim
31 words
A composition comprising a blend of poly(tetramethyleneterephthalate) and a block copolymer of polytetramethyleneether and poly(tetramethyleneterephthalate) said composition containing an effective crosslinking amount of a member selected from N,N'-m-phenylenedimaleimide and triallyl cyanurate.
Claim 3
Dependent Claim
23 words
A composition according to claim 1 wherein said effective crosslinking amount is 1-3 parts by weight per 100 parts by weight of polymer.
Claim 4
Dependent Claim
18 words
A composition according to claim 2 wherein said blend comprises up to 50% by weight of said copolymer.
Claim 5
Dependent Claim
16 words
A composition comprising a crosslinked blend of poly(tetramethyleneterephthalate) and a block copolymer of poly(tetramethyleneether) and poly(tetramethyleneterephthalate).
Claim 6
Dependent Claim
16 words
A composition comprising a crosslinked blend of poly(tetramethyleneterephthalate) and a block copolymer of poly(tetramethyleneether) and poly(tetramethyleneterephthalate).
Claim 7
Dependent Claim
16 words
A composition according to claim 4 further comprising a member selected from N,N'-m-phenylenedimaleimide and triallyl cyanurate.
Claim 8
Dependent Claim
28 words
A composition according to claim 5 wherein said member selected from N,N'-meta-phenylenedimaleimide and triallyl cyanurate comprises 1-3 parts by weight per 100 parts by weight of said blend.
Claim 9
Dependent Claim
19 words
A composition according to claim 6 wherein said blend comprises up to 50% by wieght of said block copolymer.
Claim 10
Dependent Claim
18 words
A heat recoverable article comprising a crosslinked blend of poly(tetramethyleneterephthalate) and a block copolymer of poly(tetramethyleneether) and poly(tetramethyleneterephthalate).
Claim 11
Dependent Claim
18 words
A heat recoverable article comprising a crosslinked blend of poly(tetramethyleneterephthalate) and a block copolymer of poly(tetramethyleneether) and poly(tetramethyleneterephthalate).
Claim 12
Dependent Claim
27 words
An article according to claim 8 which comprises a crosslinked composition comprising said blend and a member selected from the group consisting of N,N'-m-phenylenedimaleimide and triallyl cyanurate.
Claim 13
Dependent Claim
28 words
An article according to claim 9 wherein the member selected from N,N'-m-phenylenedimaleimide and triallyl cyanurate comprises 1-3 parts by weight per 100 parts by weight of said blend.
Claim 14
Dependent Claim
19 words
An article according to claim 10 wherein said blend comprises up to 50% by weight of said block copolymer.
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) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |