Patent US4450871A successfully refreshed from Google Patents.
US4450871A
Expired / Lapsed
US
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Heat-shrinkable tubes
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1982-04-21
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Granted: 1984-05-29
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Expires: 2002-04-21
Abstract
Abstract A heat-shrinkable tube is described, which is provided with a compound layer on the inner surface. The compound layer contains a polymerous compound containing an unsaturated bond, and a peroxide. This heat-shrinkable tube is suitable particularly for insulative covering of electronic parts or areas where they are fitted in electronic devices.
Inventors
- 👤 Yasutoshi Sato
- 👤 Keiji Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:53
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/56; H01B17/60; B; B29; B29C; B29C61/00; B29C61/06; B29C61/0608; B29C61/0616; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01R; H01R4/00; H01R4/70; H01R4/72; H02; H02G; H02G15/00; H02G15/08; H02G15/18; H02G15/1806; B29K; B29K2027/00; B29K2027/12; B29K2063/00; B29L; B29L2023/00; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
92 words
A heat-shrinkable tube comprising a base layer of heat-shrinkable polymeric material in the form of a tube having an inner surface and an outer surface and a layer of a composition on the inner surface of the tube, the composition comprising (1) a peroxide-curable acryl- or methacryl-modified epoxy resin, which is solid or semisolid at temperatures of about 0 to 30° C. but soften or liquefy at temperatures at which the tube is subject to heat-shrinkage, and (2) a peroxide sufficient to cure said resin at the heat-shrinkage temperature of the tube.
Claim 2
Dependent Claim
92 words
A heat-shrinkable tube comprising a base layer of heat-shrinkable polymeric material in the form of a tube having an inner surface and an outer surface and a layer of a composition on the inner surface of the tube, the composition comprising (1) a peroxide-curable acryl- or methacryl-modified epoxy resin, which is solid or semisolid at temperatures of about 0 to 30° C. but soften or liquefy at temperatures at which the tube is subject to heat-shrinkage, and (2) a peroxide sufficient to cure said resin at the heat-shrinkage temperature of the tube.
Claim 3
Dependent Claim
23 words
A heat-shrinkable tube as claimed in claim 1, wherein the compound layer is further comprised of a viscosity-controlling material and a reaction inhibitor.
Claim 4
Dependent Claim
25 words
A heat-shrinkable tube as claimed in claim 1, wherein the acryl- or methacryl-modified epoxy resin is a bisphenol type resin epoxy resin diacrylate or dimethacrylate.
Claim 5
Dependent Claim
18 words
A heat-shrinkable tube as claimed in claim 1, wherein the base layer is comprised of a fluorine-based polymer.
Claim 6
Dependent Claim
22 words
A heat-shrinkable tube as claimed in claim 4, wherein the fluorine-based polymer is a polyvinylidene fluoride and an ethylene tetrafluoride-propylene hexafluoride copolymer.
Claim 7
Dependent Claim
34 words
A heat-shrinkable tube as claimed in claim 1, wherein the base polymeric material is an acryl-modified epoxy resin and further wherein the peroxide is selected from group consisting of tert-butyl perbenzoate and dicumyl peroxide.
References Cited (Backward Citations)
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Cited
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Cited
US3415287A
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Cited
US3576387A
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US4223177A
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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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |