JPS5490291A - Method of reducing molecular weight of crystalline polypropylene - Google Patents
Method of reducing molecular weight of crystalline polypropyleneInfo
- Publication number
- JPS5490291A JPS5490291A JP14960178A JP14960178A JPS5490291A JP S5490291 A JPS5490291 A JP S5490291A JP 14960178 A JP14960178 A JP 14960178A JP 14960178 A JP14960178 A JP 14960178A JP S5490291 A JPS5490291 A JP S5490291A
- Authority
- JP
- Japan
- Prior art keywords
- molecular weight
- crystalline polypropylene
- catalyst
- phenylethane
- tetramethyl
- 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
Abstract
PURPOSE: Crystalline polypropylene is heated along with a specific diphenylethane as a catalyst under specific conditions to produce lower molecular weight polypropylene having good processability since its molecular weight distribution is sharp.
CONSTITUTION: A diphenylethane derivative of formula I [R5, R6 are phenyl or phenyl substituted with 1W4C alkyls; R1, R2 are 1W4C alkyl; R3, R4 are bromine, 1W4C alkyl] as 1,2-tetramethyl-1,2-phenylethane or 1,2-tetramethyl-1,2- phenylethane is added to a crystalline polypropylene in an amount of 0.001W5 wt% as a catalyst and they are heated at 200W350°C within about 1 hr. The use of an antioxidant along with above catalyst for reducing the molecular weight is desired to improve the mechanical properties of the products.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14960178A JPS5490291A (en) | 1978-12-01 | 1978-12-01 | Method of reducing molecular weight of crystalline polypropylene |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14960178A JPS5490291A (en) | 1978-12-01 | 1978-12-01 | Method of reducing molecular weight of crystalline polypropylene |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1058273A Division JPS535715B2 (en) | 1973-01-25 | 1973-01-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5490291A true JPS5490291A (en) | 1979-07-17 |
Family
ID=15478762
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14960178A Pending JPS5490291A (en) | 1978-12-01 | 1978-12-01 | Method of reducing molecular weight of crystalline polypropylene |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5490291A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4556695A (en) * | 1983-07-11 | 1985-12-03 | Akzo N.V. | Process for the degradation of (co)polymers of propylene |
JPH03182768A (en) * | 1989-12-13 | 1991-08-08 | Sanyo Chem Ind Ltd | Release agent composition for electrophotographic toner |
US5541262A (en) * | 1991-11-12 | 1996-07-30 | Centro Sviluppo Settori Impiego S.R.L. | Propylene polymer and copolymers grafted with vinylpolybutadiene and their preparation process |
-
1978
- 1978-12-01 JP JP14960178A patent/JPS5490291A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4556695A (en) * | 1983-07-11 | 1985-12-03 | Akzo N.V. | Process for the degradation of (co)polymers of propylene |
JPH03182768A (en) * | 1989-12-13 | 1991-08-08 | Sanyo Chem Ind Ltd | Release agent composition for electrophotographic toner |
US5541262A (en) * | 1991-11-12 | 1996-07-30 | Centro Sviluppo Settori Impiego S.R.L. | Propylene polymer and copolymers grafted with vinylpolybutadiene and their preparation process |
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