Patent US4134812A successfully refreshed from Google Patents.
US4134812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing shaped articles of cross-linked poly-α-olefin composition by irradiation of electron beam
Assignee: Furukawa Electric Co Ltd
•
Filing: 1977-12-14
•
Granted: 1979-01-16
•
Expires: 1997-12-14
Abstract
Abstract A method of manufacturing shaped articles of cross-linked poly- alpha -olefin composition by irradiation of electron beam which comprises the steps of blending a poly- alpha -olefin with a compound miscible therewith which is expressed by the general formula:
Inventors
- 👤 Takashi Sasaki
- 👤 Kunio Araki
- 👤 Miyuki Hagiwara
- 👤 Hayao Ishitani
- 👤 Eisuke Saito
- 👤 Kyoji Komatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:02
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; B; B29; B29C; B29C71/00; B29C71/04; C; C08; C08K; C08K5/00; C08K5/01; C08K5/04; C08K5/10; C08K5/13; C08K5/134; C08K5/1345; B29C35/00; B29C35/02; B29C35/08; B29C35/0866; B29C2035/0872; B29K; B29K2023/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
A method of manufacturing shaped articles of cross-linked poly-α-olefin composition by irradiation of electron beam which comprises the steps of blending the poly-α-olefin with a compound which is miscible with the poly-α-olefin and is expressed by the general formula: X--Ym where X is a group free from acetylenic linkage, Y is a group containing acetylenic linkage, and m is an integer of 1 or over, and tetrakis-[methylene-(3,5-di-t-butyl-4-hydroxy-hydrocinnamate)]-methane; molding the blended mass into a desired shape; and irradiating electron beam on said shaped articles.
Claim 2
Independent Claim
83 words
A method of manufacturing shaped articles of cross-linked poly-α-olefin composition by irradiation of electron beam which comprises the steps of blending the poly-α-olefin with a compound which is miscible with the poly-α-olefin and is expressed by the general formula: X--Ym where X is a group free from acetylenic linkage, Y is a group containing acetylenic linkage, and m is an integer of 1 or over, and tetrakis-[methylene-(3,5-di-t-butyl-4-hydroxy-hydrocinnamate)]-methane; molding the blended mass into a desired shape; and irradiating electron beam on said shaped articles.
Claim 3
Dependent Claim
51 words
The method according to claim 1, where the compound which is miscible with the poly-α-olefin and is expressed by the general formula X--Ym is one selected from the group consisting of an ester of acetylene alcohol and polyhydric carboxylic acid and an ester of acetylene series carboxylic acid and polyhydric alcohol.
Claim 4
Dependent Claim
48 words
The method according to claim 1, wherein the poly-α-olefin composition is prepared by blending 100 parts by weight of poly-α-olefin as a matrix with 0.1 to 5 parts by weight of the compound expressed by the general formula X--Ym and 0.1 to 2.0 parts by weight of tetrakis-[methylene-(3,5-di-t-butyl-4-hydroxy-hydrocinnamate)]-methane.
Claim 5
Dependent Claim
21 words
The method according to claim 1, wherein the poly-α-olefin composition is extruded to shaped articles having thickness of at least 0.5mm.
Claim 6
Dependent Claim
28 words
The method according to claim 1, wherein shaped articles of the poly-α-olefin composition are applied as an electric insulation layer on the peripheral surface of an electric conductor.
Claim 7
Dependent Claim
17 words
The method according to claim 1, wherein shaped articles of the poly-α-olefin composition are a hollow pipe.
Claim 8
Dependent Claim
34 words
The method according to claim 1, wherein electron beam having energies of at least 1.0 MeV are irradiated on shaped articles of the poly-α-olefin composition at a higher dose rate than 10 4 rad/sec.
Claim 9
Dependent Claim
32 words
The method according to claim 1, wherein shaped articles of the poly-α-olefin composition cross-linked by irradiation of electron beam are applied as an electric insulation layer to an electric wire or cable.
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) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |