Patent US4316783A successfully refreshed from Google Patents.
US4316783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for modifying a shaped polyethylene
Assignee: Japan Atomic Energy Agency
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Filing: 1979-06-14
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Granted: 1982-02-23
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Expires: 1999-06-14
Abstract
Abstract An improved process for cross-linking a shaped polyethylene is herein disclosed comprising irradiating it with electron beams using 0.2 to 2 parts by weight of amine alone or in combination with 0.2 to 1.0 part by weight of alcohol for 100 parts by weight of polyethylene to thereby improve the electrical, mechanical, thermal and other characteristics of the polyethylene.
Inventors
- 👤 Fumio Hosoi
- 👤 Takashi Sasaki
- 👤 Miyuki Hagiwara
- 👤 Noboru Kasai
- 👤 Kunio Araki
- 👤 Takayuki Hirano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:08
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/04; C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; B29C35/00; B29C35/02; B29C35/08; B29C35/0866; B29C2035/0877; B29K; B29K2023/00; B29K2023/04; B29K2023/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
In the process for cross-linking a shaped polyethylene by irradiating the polyethylene with electron beams having a maximum range smaller than the thickness of the polyethylene measured in the direction of transmission of electron beam, the improvement whereby Lichtenberg discharge is prevented comprising adding 0.2 to 2 parts by weight of an amine having a basicity of 9.5 pKb or less to 100 parts by weight of polyethylene prior to its irradiation with electron beams.
Claim 2
Dependent Claim
75 words
In the process for cross-linking a shaped polyethylene by irradiating the polyethylene with electron beams having a maximum range smaller than the thickness of the polyethylene measured in the direction of transmission of electron beam, the improvement whereby Lichtenberg discharge is prevented comprising adding 0.2 to 2 parts by weight of an amine having a basicity of 9.5 pKb or less to 100 parts by weight of polyethylene prior to its irradiation with electron beams.
Claim 3
Dependent Claim
75 words
In the process for cross-linking a shaped polyethylene by irradiating the polyethylene with electron means having a maximum range smaller than the thickness of the polyethylene measured in the direction of transmission of electron beams, the improvement whereby Lichtenberg discharge is prevented comprising adding 0.2 to 1.0 part by weight of alcohol and 2 or less parts by weight of amine to 100 parts by weight of polyethylene prior to its irradiation with electron beams.
Claim 4
Dependent Claim
75 words
In the process for cross-linking a shaped polyethylene by irradiating the polyethylene with electron means having a maximum range smaller than the thickness of the polyethylene measured in the direction of transmission of electron beams, the improvement whereby Lichtenberg discharge is prevented comprising adding 0.2 to 1.0 part by weight of alcohol and 2 or less parts by weight of amine to 100 parts by weight of polyethylene prior to its irradiation with electron beams.
Claim 5
Dependent Claim
19 words
The process as claimed by claim 2 wherein the amine has a basicity of 9.5 in pKb or less.
Claim 6
Dependent Claim
20 words
The process as claimed by claim 1 or 2 wherein the amine is substituted by a hydroxyl or phenyl group.
Claim 7
Dependent Claim
26 words
The process of claim 2 wherein the alcohol has a melting point of 50° C. or less and a boiling point of 130° C. or more.
Claim 8
Dependent Claim
31 words
The process as claimed by claim 1, wherein the amine is added in an amount of 0.5 to 1 part by weight of amine to 100 parts by weight of polyethylene.
Claim 9
Dependent Claim
31 words
The process as claimed by claim 2, wherein the amine is added in an amount of 0.1 to 0.5 parts by weight of amine to 100 parts by weight of polyethylene.
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) | 1985-02-22 | 1985-08-24 | 1986-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-22 | 1989-08-24 | 1990-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-22 | 1993-08-24 | 1994-02-23 | $7700.00 | Window Closed / Lapsed |