Title:
ETHYLENE COPOLYMER RUBBER COMPOSITION IMPROVED IN BLOOMING RESISTANCE AND VULCANIZED RUBBER OBTAINED THEREFROM
Document Type and Number:
Japanese Patent JP3487672
Kind Code:
B2
Abstract:
PURPOSE: To obtain an ethylene copolymer rubber compsn. having a high vulcanization rate and improved in blooming resistance by compounding a specific copolymer rubber with sulfur or a sulfur compd. and a vulcanization accelerator in a specified wt. ratio.
CONSTITUTION: The compsn. contains 100 pts.wt. random copolymer rubber made from ethylene, a 3-20C α-olefin, and at least one branched polyene compd. represented by the formula (wherein n is 1-5; R1 is 1-5C alkyl; and R2 and R3 are each H or 1-5C alkyl), 0.5-10 pt.wt. vulcanizing agent comprising sulfur or a sulfur compd., and 1-20 pts.wt. vulcanization accelerator. The rubber has a molar ratio of ethylene units to α-olefin units of (40/60)-(95/5), an iodine value of 5-40, and an intrinsic viscosity [η] (at 135°C in decalin) higher than 0.8dl/g and lower than 5.0dl/g. Examples of the sulfur compd. are sulfur chloride, sulfur dichloride, a high-molecular polysulfide, and a compd. liberating active sulfur at the vulcanization temp.
Inventors:
Kawasaki Masaaki
Hideshi Nakahama
Hiroshi Kameda
Tetsuo Tojo
Toshiyuki Tsutsui
Toshihiro Aine
Hideshi Nakahama
Hiroshi Kameda
Tetsuo Tojo
Toshiyuki Tsutsui
Toshihiro Aine
Application Number:
JP12543595A
Publication Date:
January 19, 2004
Filing Date:
May 24, 1995
Export Citation:
Assignee:
Mitsui Chemicals, Inc.
International Classes:
C08J3/24; C08K3/04; C08K3/06; C08K5/00; C08K5/36; C08L9/00; C08L21/00; C08L23/00; C08L23/08; C08L23/18; (IPC1-7): C08L23/08; C08J3/24; C08K3/06; C08L23/18
Domestic Patent References:
| JP8325334A | ||||
| JP8337697A | ||||
| JP8311266A | ||||
| JP8311265A | ||||
| JP8311263A |
Attorney, Agent or Firm:
Shunichiro Suzuki
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