JPS5730738A - Production of rubber composition - Google Patents
Production of rubber compositionInfo
- Publication number
- JPS5730738A JPS5730738A JP10319880A JP10319880A JPS5730738A JP S5730738 A JPS5730738 A JP S5730738A JP 10319880 A JP10319880 A JP 10319880A JP 10319880 A JP10319880 A JP 10319880A JP S5730738 A JPS5730738 A JP S5730738A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- olefin
- alpha
- poly
- melting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
PURPOSE:A high-melting, isotactic poly-alpha-olefin is dispersed in polyisoprene rubber in microparticles to produce the objective rubber composition showing the same level of tensile strength as conventional vulcanized rubber and improved elasticity, breakage properties and processability. CONSTITUTION:An isotactic poly-alpha-olefin melting at higher than 150 deg.C, preferably polypropylene, is dispersed in a rubber of polyisoprene (more than 90% cis-1,4- unit content) or a rubber mainly containing polyisopresene (more than 50%), preferably a diene rubber, into micro particles of less than 50 micron particle size on the average and the resultant mixture is drawn by the use of rollers in the temperature range from 65 deg.C lower than the melting point of the poly-alpha-olefin to 20 deg.C higher than the melting point. The drawn product is cooled to a usual processing temperature, additives are added, then they are kneaded, vulcanized and formed. When the content of the poly-alpha-olefin is 2-40wt%, preferably 3-25wt%, a vulcanized rubber of high elasticity, tearing resistance and flexural resistance is obtained.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10319880A JPS5730738A (en) | 1980-07-29 | 1980-07-29 | Production of rubber composition |
DE8181301878T DE3175852D1 (en) | 1980-04-28 | 1981-04-28 | Process for the preparation of rubber compositions having a high modulus of elasticity |
EP19810301878 EP0039240B1 (en) | 1980-04-28 | 1981-04-28 | Process for the preparation of rubber compositions having a high modulus of elasticity |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10319880A JPS5730738A (en) | 1980-07-29 | 1980-07-29 | Production of rubber composition |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5730738A true JPS5730738A (en) | 1982-02-19 |
JPS6255537B2 JPS6255537B2 (en) | 1987-11-20 |
Family
ID=14347814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10319880A Granted JPS5730738A (en) | 1980-04-28 | 1980-07-29 | Production of rubber composition |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5730738A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS617343A (en) * | 1984-06-21 | 1986-01-14 | Mitsui Petrochem Ind Ltd | Low-specific gravity rubber composition |
JPS6137831A (en) * | 1984-07-31 | 1986-02-22 | Mitsui Petrochem Ind Ltd | Rubber composition |
JP2004263046A (en) * | 2003-02-28 | 2004-09-24 | Sumitomo Rubber Ind Ltd | Rubber composition for tire and pneumatic tire using the same |
JP2004263045A (en) * | 2003-02-28 | 2004-09-24 | Sumitomo Rubber Ind Ltd | Rubber composition for tire and pneumatic tire using the same |
JP2004339287A (en) * | 2003-05-13 | 2004-12-02 | Sumitomo Rubber Ind Ltd | Rubber composition for bead apex and pneumatic tire using the same |
-
1980
- 1980-07-29 JP JP10319880A patent/JPS5730738A/en active Granted
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS617343A (en) * | 1984-06-21 | 1986-01-14 | Mitsui Petrochem Ind Ltd | Low-specific gravity rubber composition |
JPH0570657B2 (en) * | 1984-06-21 | 1993-10-05 | Mitsui Petrochemical Ind | |
JPS6137831A (en) * | 1984-07-31 | 1986-02-22 | Mitsui Petrochem Ind Ltd | Rubber composition |
JPH0570658B2 (en) * | 1984-07-31 | 1993-10-05 | Mitsui Petrochemical Ind | |
JP2004263046A (en) * | 2003-02-28 | 2004-09-24 | Sumitomo Rubber Ind Ltd | Rubber composition for tire and pneumatic tire using the same |
JP2004263045A (en) * | 2003-02-28 | 2004-09-24 | Sumitomo Rubber Ind Ltd | Rubber composition for tire and pneumatic tire using the same |
JP2004339287A (en) * | 2003-05-13 | 2004-12-02 | Sumitomo Rubber Ind Ltd | Rubber composition for bead apex and pneumatic tire using the same |
Also Published As
Publication number | Publication date |
---|---|
JPS6255537B2 (en) | 1987-11-20 |
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