Title:
ETHYLENE/ALPHA-OLEFIN COPOLYMER RUBBER
Document Type and Number:
Japanese Patent JP3575157
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an ethylene/α-olefin copolymer rubber excellent in processability and heat resistance, having a high tensile strength, and free from the occurrence of bleeding of the low-molecular part.
SOLUTION: This copolymer rubber consists of ethylene and a 3-12C α-olefin and satisfies the following conditions (a) to (f): (a) the α-olefin content is 5-35wt.%, (b) the Mooney viscosity [ML1+4(121°C]is 10 to 45, (c) the copolymer of the part corresponding to the high-molecular-weight peak of the molecular weight distribution curve has a molecular weight corresponding to a Mooney viscosity [ML1+4(121°C)] of 25 or more to less than 70 when extended with 70 phr oil, (d) the Q value (weight-average molecular chain length/number- average molecular chain length) measured by GPC is at least 4, (e) it exhibits a bimodal molecular weight distribution curve, and (f) the ratio of the height (X1) of the high-molecular-weight peak of the molecular weight distribution curve to the height (X2) of the low-molecular-weight peak (H=X1/X2) is at most 1.8.
Inventors:
Tsuki Wakatsuki
Katsunari Inagaki
Katsunari Inagaki
Application Number:
JP4986096A
Publication Date:
October 13, 2004
Filing Date:
March 07, 1996
Export Citation:
Assignee:
Sumitomo Chemical Co., Ltd.
International Classes:
C08F4/642; C08F4/60; C08F4/6592; C08F210/16; (IPC1-7): C08F210/16
Domestic Patent References:
| JP62295910A | ||||
| JP61264035A | ||||
| JP61057608A | ||||
| JP57131212A | ||||
| JP61004708A | ||||
| JP52141888A | ||||
| JP63178113A | ||||
| JP56157412A | ||||
| JP9512848A |
Attorney, Agent or Firm:
Takashi Kuboyama
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