JPS5730738A - Production of rubber composition - Google Patents

Production of rubber composition

Info

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
Application number
JP10319880A
Other languages
Japanese (ja)
Other versions
JPS6255537B2 (en
Inventor
Kazuhiko Yamamoto
Yasuyuki Shimozato
Hiroharu Ikeda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JSR Corp
Original Assignee
Japan Synthetic Rubber Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Japan Synthetic Rubber Co Ltd filed Critical Japan Synthetic Rubber Co Ltd
Priority to JP10319880A priority Critical patent/JPS5730738A/en
Priority to DE8181301878T priority patent/DE3175852D1/en
Priority to EP19810301878 priority patent/EP0039240B1/en
Publication of JPS5730738A publication Critical patent/JPS5730738A/en
Publication of JPS6255537B2 publication Critical patent/JPS6255537B2/ja
Granted legal-status Critical Current

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  • 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.
JP10319880A 1980-04-28 1980-07-29 Production of rubber composition Granted JPS5730738A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (7)

* Cited by examiner, † Cited by third party
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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