US4481131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroconductive resin composition
Assignee: Mitsui Toatsu Chemicals Inc
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Filing: 1982-02-11
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Granted: 1984-11-06
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Expires: 2002-02-11
Abstract
Abstract An electroconductive polyolefin composition comprising (1) 100 parts by weight of a polyolefin resin, (2) 10 to 60 parts by weight of carbon black, (3) 0.1 to 6 parts by weight of sulfur and (4) at least 0.1 part by weight of one or two specified accelerators, and optionally containing 5 to 60 parts by weight of atactic polypropylene.
Inventors
- 👤 Yoichi Kawai
- 👤 Yoshihisa Gotoh
- 👤 Masami Maki
- 👤 Sachio Yokote
- 👤 Katsumi Sekiguchi
- 👤 Katsuyoshi Sasagawa
- 👤 Masao Imai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:13
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; C; C08; C08K; C08K13/00; C08K13/02; C08K3/00; C08K3/02; C08K3/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
165 words
An electroconductive polypropylene-type resin composition comprising: (1) 100 parts by weight of a resin selected from the group consisting of a propylene homopolymer, an ethylene-propylene copolymer, an ethylene-propylene random copolymer rubber, an ethylene-propylene non-conjugation diene copolymer rubber and a blend of two or more of said polymers; (2) 10 to 60 parts by weight of carbon black, (3) 0.1 to 6 parts by weight sulfur, and (4) at least 0.1 part by weight of one or two accelerators selected from the group consisting of (i) thiophenol derivatives of the formula: ##STR9## wherein X represents a hydrogen atom, a halogen atom, or a lower alkyl group and n represents an integer of 1 to 3, (ii) metal complexes of said thiophenol derivatives with at least one metal selected from the group consisting of iron, magnesium and zinc, and (iii) compounds of the formula: ##STR10## wherein A represents any one of: ##STR11## in which X represents an oxygen or sulphur atom, or methylene, imino or sulfuryl group.
Claim 2
Dependent Claim
165 words
An electroconductive polypropylene-type resin composition comprising: (1) 100 parts by weight of a resin selected from the group consisting of a propylene homopolymer, an ethylene-propylene copolymer, an ethylene-propylene random copolymer rubber, an ethylene-propylene non-conjugation diene copolymer rubber and a blend of two or more of said polymers; (2) 10 to 60 parts by weight of carbon black, (3) 0.1 to 6 parts by weight sulfur, and (4) at least 0.1 part by weight of one or two accelerators selected from the group consisting of (i) thiophenol derivatives of the formula: ##STR9## wherein X represents a hydrogen atom, a halogen atom, or a lower alkyl group and n represents an integer of 1 to 3, (ii) metal complexes of said thiophenol derivatives with at least one metal selected from the group consisting of iron, magnesium and zinc, and (iii) compounds of the formula: ##STR10## wherein A represents any one of: ##STR11## in which X represents an oxygen or sulphur atom, or methylene, imino or sulfuryl group.
Claim 3
Dependent Claim
26 words
The composition as claimed in claim 1 wherein the amount of the thiophenol derivative (i) of formula (1) added is 0.2 to 2 parts by weight.
Claim 4
Dependent Claim
23 words
The composition as claimed in claim 1 wherein the amount of the metal complex (ii) added is 0.2 to 2 parts by weight.
Claim 5
Dependent Claim
25 words
The composition as claimed in claim 1 wherein the amount of the compound (iii) of formula (2) added is 1 to 5 parts by weight.
Claim 6
Dependent Claim
40 words
The composition as claimed in claim 1 wherein the polypropylene-type resin is an ethylene/propylene copolymer, a combination of a propylene homopolymer with an ethylene/propylene random copolymer rubber, or a combination of an ethylene/propylene copolymer with an ethylene/propylene random copolymer rubber.
Claim 7
Dependent Claim
53 words
The composition as claimed in claim 1 which comprises 100 parts by weight of the polypropylene-type resin, 10 to 60 parts by weight of carbon black, 0.1 to 6 parts by weight of sulfur, 0.1 to 4 parts by weight of the accelerator, and 5 to 60 parts by weight of atactic polypropylene.
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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) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |