JPS55137116A - Propylene block copolymer and production thereof - Google Patents
Propylene block copolymer and production thereofInfo
- Publication number
- JPS55137116A JPS55137116A JP4380979A JP4380979A JPS55137116A JP S55137116 A JPS55137116 A JP S55137116A JP 4380979 A JP4380979 A JP 4380979A JP 4380979 A JP4380979 A JP 4380979A JP S55137116 A JPS55137116 A JP S55137116A
- Authority
- JP
- Japan
- Prior art keywords
- propylene
- cpd
- block copolymer
- polymn
- stereoregular
- 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
- Graft Or Block Polymers (AREA)
Abstract
PURPOSE: To obtain a block copolymer having well-balanced properties of heat resistance, impact resistance and softening characteristics, by a method wherein propylene is homopolymerized in the presence of a stereoregular polymn. catalyst and then is copolymerized with an unsaturated hydrocarbon cpd.
CONSTITUTION: Propylene is homopolymerized in the presence of a stereoregular polymn. catalyst until the amount of polymerized propylene reaches an amount corresponding to 0.5W50wt% of a final polymer. Then propylene is copolymerized in the presence of the homopolymer with an unsaturated hydrocarbon cpd (cpd. A) selected from a 5W12C branched α-olefin, styrene and a styrene derivative until the total amount of polymerized cpd. A and propylene other than homopolymer reaches an amount corresponding to 50W99.5wt% of the final polymer, to obtain a propylene block copolymer composed of propylene and 99.5W50pts.wt. of a random copolymer part of propylene and the cpd. A and having a limiting viscosity number of 0.3W15dl/g (measured in decalin at 135°C).
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4380979A JPS55137116A (en) | 1979-04-11 | 1979-04-11 | Propylene block copolymer and production thereof |
US06/136,548 US4311810A (en) | 1979-04-11 | 1980-04-02 | Block copolymers of propylene and 4-methyl-1-pentene |
GB8011988A GB2048283B (en) | 1979-04-11 | 1980-04-11 | Propylene copolymers and the production thereof |
DE19803013910 DE3013910A1 (en) | 1979-04-11 | 1980-04-11 | PROPYLENE MIXED POLYMERS AND PRODUCTION THEREOF |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4380979A JPS55137116A (en) | 1979-04-11 | 1979-04-11 | Propylene block copolymer and production thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55137116A true JPS55137116A (en) | 1980-10-25 |
JPS6228808B2 JPS6228808B2 (en) | 1987-06-23 |
Family
ID=12674063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4380979A Granted JPS55137116A (en) | 1979-04-11 | 1979-04-11 | Propylene block copolymer and production thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55137116A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS505041Y1 (en) * | 1969-02-12 | 1975-02-12 | ||
JPS5045311A (en) * | 1973-08-29 | 1975-04-23 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5329390A (en) * | 1976-09-01 | 1978-03-18 | Toa Nenryo Kogyo Kk | Preparation of ethylene-propylene block copolymer |
JPS5330686A (en) * | 1976-09-02 | 1978-03-23 | Toa Nenryo Kogyo Kk | Preparation of ethylene-propylene block copolymers |
JPS5580418A (en) * | 1978-12-12 | 1980-06-17 | Chisso Corp | Preparation of propylene-ethylene block copolymer |
-
1979
- 1979-04-11 JP JP4380979A patent/JPS55137116A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS505041Y1 (en) * | 1969-02-12 | 1975-02-12 | ||
JPS5045311A (en) * | 1973-08-29 | 1975-04-23 |
Also Published As
Publication number | Publication date |
---|---|
JPS6228808B2 (en) | 1987-06-23 |
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