EP0103695A1
Expired / Lapsed
EP
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Vulcanized olefin-based rubber composition
Assignee: Resonac Holdings Corp
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Filing: 1983-07-14
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Granted: —
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Expires: 2003-07-14
Abstract
Abstract A vulcanized olefin-based rubber composition is disclosed which is produced by vulcanizing an olefin-based rubber composition with a sulfur-containing substance alone or with a sulfur-containing substance and a vulcanization accelerator in combination. The olefin-based rubber composition is composed of (A) olefin-based rubber composed mainly of ethylene and propylene and (B) aluminium or an aluminium alloy in the form of powder, fiber, or flake, or being composed of (A) olefin-based rubber composed mainly of ethylene and propylene, (B) aluminium or an aluminium alloy in the form of powder, fiber, orflake, and (C) electrically-conductive carbon black, and said sulfur-containing substance being selected from the group consisting of a sulfur-based vulcanizing agent and a sulfur-releasing agent.The composition of this invention is superior in the shielding of electromagnetic waves.
Inventors
- 👤 Masahiko Maeda
- 👤 Kenji Fujitani
- 👤 Naotochi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 23:23
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; C; C08; C08K; C08K3/00; C08K3/02; C08K3/08; H01B1/22
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
62 words
l. An olefin-based rubber ·composition, comprising: (A) 40 to 90 wt% of an olefin-based rubber composed mainly of ethylene and propylene; and (B) 10 to 60 wt% of a metal selected from the group consisting of aluminum and an aluminum alloy in a form selected from. the group consisting of powder, fiber and flake, said composition being vulcanized with a sulfur-containing substance.
Claim 2
Dependent Claim
92 words
An olefin-based rubber composition, comprising: (A) 40 to 90 wt% of an olefin-based rubber composed mainly of ethylene and propylene; and (B) 5 to 55 wt% of a metal selected from the group consisting of aluminum and an aluminum alloy in a form r selected from the group consisting of powder, fiber, and flake; and (C) 5 to 55 wt% of electrically-conductive carbon black, the total quantity of the aluminum powder and the electrically-conductive carbon black being 10 to 60 wt% in the composition, said composition being vulcanized with a sulfur-containing substance.
Claim 3
Dependent Claim
27 words
An olefin-based rubber composition as claimed in Claim 1, wherein the sulfur-containing substance is selected from the group consisting of a sulfur-based vulcanizing agent and sulfur-releasing agent.
Claim 4
Dependent Claim
23 words
An olefin-based rubber composition as claimed in Claim 1, wherein the composition is vulcanized with the fulfur-containing substance combined with a vulcanization accelerator.
Claim 5
Dependent Claim
41 words
An olefin-based rubber composition as claimed in Claim 1, wherein the metal is present in the form of flakes having an area of 0.1 to 0.5 mm x 0.1 to 5 mm and a thickness of about 0.02 to 0.1 mm.
Claim 6
Dependent Claim
19 words
An olefin-based rubber composition as claimed in Claim 1, wherein the aluminum alloy contains 80 wt% aluminum or more.
Claim 7
Dependent Claim
48 words
An olefin-based rubber composition as claimed in Claim 2, wherein the electrically-conductive carbon black has a specific surface area in the range of 20 to 1,800 m2/g, and a pore volume of 1.5 to 4.0 mℓ/g, the pores ranging in size from 30 to 7,600 A in diameter.
Claim 8
Dependent Claim
30 words
An olefin-based rubber composition as claimed in Claim 7, wherein the carbon black has a specific surface area in the range of 200 to 1,2 0 0 m 2 /g.
Claim 9
Dependent Claim
26 words
An olefin-based rubber composition as claimed in Claim 1, wherein the olefin-based rubber is present in an amount in the range of 50 to 80 wt%.
Claim 10
Dependent Claim
25 words
An olefin-based rubber composition as claimed in Claim 9, wherein the metal is present in an amount in the range of 20 to 50 wt%.
Claim 11
Dependent Claim
33 words
ll. An olefin-based rubber composition as claimed in Claim 2, wherein the metal and the electrically conductive carbon black are present in a combined amount in the range of 10 to 50 wt%.
Claim 12
Dependent Claim
29 words
An olefin-based rubber composition as claimed in Claim 11, wherein the volume ratio of the metal to the electrically-conductive carbon black is in the range of 4.0/1 to 1/4.0.
Claim 13
Dependent Claim
39 words
An olefin-based rubber composition as claimed in Claim 1, wherein the sulfur-containing substance is present in an amount in the range of 0.05 to 10 parts by weight per 100 parts by weight of the olefin-based rubber and metal.
Claim 14
Dependent Claim
40 words
An olefin-based rubber composition as claimed in Claim 13, wherein the sulfur-containing substance is present in an amount in the range of 0.2 to 8 parts by r weight per 100 parts by weight of the olefin-based rubber and metal.
Claim 15
Dependent Claim
36 words
An olefin-based rubber composition as claimed in Claim 4, wherein the vulcanization accelerator is present in an amount of 10 parts by weight or less per 100 parts by weight of the olefin-based rubber and metal.
References Cited (Backward Citations)
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