Patent US3615960A successfully refreshed from Google Patents.
US3615960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonding using epoxy resin composition and nonactivated blowing agent
Assignee: Fujikura Ltd
•
Filing: 1968-02-26
•
Granted: 1971-10-26
•
Expires: 1988-02-26
Abstract
Abstract Epoxy resin composition consisting essentially of an epoxy resin component, curing agent, thermally decomposable blowing agent and optionally thermoplastic polymer, said composition, after curing, being capable of being broken up by expanding with the application of heat. It is used, for example, in joining cables by connecting core wires, slipping sleeve over portion where core wires have been connected, sealing said sleeve and sheath by said epoxy composition and thereafter curing said epoxy composition to form sealed portion, said sealed portion being capable of subsequent dismantlement.
Inventors
- 👤 Kiyoshi Hoshii
- 👤 Hisao Ishikawa
- 👤 Keishi Tado
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:59
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/013; C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C09; C09J; C09J5/00; C09J5/08; C08L; C08L63/00; C09J2463/00; Y; Y10; Y10S; Y10S156/00; Y10S156/918; Y10S156/919; Y10S156/922; Y10S156/923; Y10T; Y10T156/00; Y10T156/11; Y10T156/1168; Y10T225/00; Y10T225/30; Y10T225/304
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
75 words
A method of joining cables according to claim 1 wherein a. the cables to be joined are sheathed, b. the core wires of said sheathed cables are physically joined, c. a sleeve is slipped over said physically joined portion of the core wires so that the sleeve and sheath abut, d. the resin composition is applied to the area in which said sleeve and sheath abut whereby said sleeve and sheath are more firmly joined.
Claim 2
Dependent Claim
33 words
A process according to claim 1, wherein the epoxy resin component is a compound of the formula wherein R is a bivalent hydrocarbon group and n is a number from 0 to 8.
Claim 3
Dependent Claim
13 words
A process according to claim 3, wherein n is 0, 1 or 2.
Claim 4
Dependent Claim
26 words
A process according to claim 1, wherein the epoxy resin component is a condensation product of epichlorohydrin and an aromatic polyhydric alcohol or a polyhydric phenol.
Claim 5
Dependent Claim
34 words
A process according to claim 1, wherein the curing agent is a diamine, a polyamine, a polyamide resin of relatively low molecular weight, a polysulfide, or a mixture of two or more such compounds.
Claim 6
Dependent Claim
27 words
A process according to claim 1, wherein 5-100 parts by weight of the curing agent are used per 100 parts by weight of the epoxy resin component.
Claim 7
Dependent Claim
15 words
A process according to claim 7, wherein 30-60 parts of the curing agent are used.
Claim 8
Dependent Claim
22 words
A process according to claim 1, wherein the blowing agent is a solid blowing agent having a decomposition temperature of 90*-200* C.
Claim 9
Dependent Claim
32 words
A process according to claim 1, wherein the blowing agent is selected from the group consisting of azoisobutyronitrile, dinitrosopentamethylene tetramine, azodicarbamic acid amide, benzenesulphonyl hydrazide, p,p'' -oxybis(benzenesulphonyl hydrazide), and N,N'' -dinitroso-N,N'' -dimethylterephthalamide.
Claim 10
Dependent Claim
27 words
A process according to claim 1, wherein 10-50 parts by weight of the blowing agent are used per 100 parts by weight of the epoxy resin component.
Claim 11
Dependent Claim
15 words
A process according to claim 10, wherein 15-25 parts of the blowing agent are used.
Claim 12
Dependent Claim
18 words
A process according to claim 1, wherein said epoxy resin component includes a thermoplastic polymer in admixture therewith.
Claim 13
Dependent Claim
21 words
A process according to claim 13, wherein the thermoplastic polymer is a homopolymer or copolymer of one or more alpha-beta-unsaturated compounds.
Claim 14
Dependent Claim
26 words
A process according to claim 13, which contains 3-30 parts by weight of the thermoplastic polymer per 100 parts by weight of the epoxy resin component.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |