JPS55144039A - Rubber composition - Google Patents
Rubber compositionInfo
- Publication number
- JPS55144039A JPS55144039A JP5148879A JP5148879A JPS55144039A JP S55144039 A JPS55144039 A JP S55144039A JP 5148879 A JP5148879 A JP 5148879A JP 5148879 A JP5148879 A JP 5148879A JP S55144039 A JPS55144039 A JP S55144039A
- Authority
- JP
- Japan
- Prior art keywords
- polybutadiene
- less
- rubber
- vulcanized
- blended
- 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.)
- Pending
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
PURPOSE: To provide rubber compsn. in which working properties are improved without lowering physical properties, by a method wherein 1,2-polybutadiene is blended with natural rubber contg. vulcanized rubber powder and sulfur.
CONSTITUTION: 5W300pts.wt. of vulcanized rubber powder and 4W10pts.wt. of sulfur are blended with 100pts.wt. of a mixt. consisting of 5W80pts.wt. of 1,2- polybutadiene and 95W20pts.wt. of at least one rubber selected from natural rubber and synthetic rubbers. It is preferred to use 1,2-polybutadiene having a vinyl bond content of not less than 70%, crystallinity of not less than 5%, and an intrinsic viscosity [η] of not less than 0.7 (at 30°C in toluene). Such 1,2-polybutadiene can be obtained by using Ziegler type catalyst. When the amount of 1,2-polybutadiene sued in the blend exceeds 80wt%, beneficial result can not be expected and the tensile strength of vulcanized material is lowered. Below 5wt%, improvement in working properties is insufficient.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5148879A JPS55144039A (en) | 1979-04-27 | 1979-04-27 | Rubber composition |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5148879A JPS55144039A (en) | 1979-04-27 | 1979-04-27 | Rubber composition |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55144039A true JPS55144039A (en) | 1980-11-10 |
Family
ID=12888344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5148879A Pending JPS55144039A (en) | 1979-04-27 | 1979-04-27 | Rubber composition |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55144039A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5395891A (en) * | 1992-06-24 | 1995-03-07 | Bayer Aktiengesellschaft | Rubber mixtures containing polybutadiene gel |
-
1979
- 1979-04-27 JP JP5148879A patent/JPS55144039A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5395891A (en) * | 1992-06-24 | 1995-03-07 | Bayer Aktiengesellschaft | Rubber mixtures containing polybutadiene gel |
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