EP0072203A2
Expired / Lapsed
EP
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Method of producing partially cross-linked rubber-resin composition
Assignee: Mitsui Chemicals Inc
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Filing: 1982-08-04
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Granted: —
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Expires: 2002-08-04
Abstract
Abstract A partially cross-linked rubber-resin composition is made by directly feeding a particulate peroxide-curable olefin copolymer rubber and a peroxide decomposing polyolefin resin with an organic peroxide compound to a twin screw extruder so that the rubber and the resin are thereby subjected to dynamic heat treatment in the presence of the peroxide.
Inventors
- 👤 Shunji Abe
- 👤 Akira Matsuda
- 👤 Shizuo Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 08:19
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/395; B29C48/40; B29C48/78; B29C48/80; B29C48/802; C08L23/10; C08L23/12; C08L23/18; C08L23/20; C08L2205/00; C08L2205/03; C08L2205/035; C08L23/14; C08L23/142; C08L2312/00; C08L91/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
68 words
A method of producing a partially cross-linked rubber-resin composition by melting and mixing a peroxid< curable olefin copolymer rubber and a peroxide-decomposing polyolefin resin with an organic peroxide compound characterised in that the rubber in particulate form and the resin and peroxide are fed to a twin screw extruder and the rubber and the resin are thereby subjected to dynamic heat treatment in the presence of the peroxide.
Claim 2
Independent Claim
68 words
A method of producing a partially cross-linked rubber-resin composition by melting and mixing a peroxid< curable olefin copolymer rubber and a peroxide-decomposing polyolefin resin with an organic peroxide compound characterised in that the rubber in particulate form and the resin and peroxide are fed to a twin screw extruder and the rubber and the resin are thereby subjected to dynamic heat treatment in the presence of the peroxide.
Claim 3
Dependent Claim
20 words
A method according to claim 1 characterised in that the rubber particles have a maximum dimension not exceeding 25 mm.
Claim 4
Dependent Claim
22 words
A method according to claim 2 characterised in that the rubber particles have a maximum dimension of from 0.5 to 20 mm.
Claim 5
Independent Claim
41 words
A method according to any preceding claim characterised in that the dynamic heat treatment is carried out under the condition: wherein "x" stands for weight of the copolymer rubber (g/100 particle), and "y" stands for specific energy at the extrusion (KWhr/kg).
Claim 6
Dependent Claim
14 words
A method according to claim 4 characterised in that x is 1 to 50.
Claim 7
Dependent Claim
17 words
A method according to claim 4 or claim 5 characterised in that y is 1.5 or less.
Claim 8
Independent Claim
35 words
A method according to any preceding claim characterised in that the polyolefin resin is fed into the extruder in the form of particles having a weight in the range of 1 to 10 g/100 particles.
Claim 9
Independent Claim
19 words
A method according to any preceding claim characterised in that the weight ratio of rubber:resin is 20:80 to 90:10.
Claim 10
Independent Claim
21 words
A method according to any preceding claim characterised in that a cross-linking aid, preferably divinylbenzene, is present during the heat treatment.
Claim 11
Independent Claim
57 words
A method according to any preceding claim characterised in that the rubber is an amorphous copolymer of olefins, or an amorphous copolymer of olefins and non-conjugated diene and the resin is a crystalline polypropylene, poly(1-butene) or poly(4-methyl-1-pentene) or a copolymer containing at least 85 molar % thereof with an alpha olefin containing 2 to 10 carbon atoms.
References Cited (Backward Citations)
No citation records indexed.
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