JPS5634795A - Continuous preparation of dispersion type viscosity improver - Google Patents
Continuous preparation of dispersion type viscosity improverInfo
- Publication number
- JPS5634795A JPS5634795A JP10971279A JP10971279A JPS5634795A JP S5634795 A JPS5634795 A JP S5634795A JP 10971279 A JP10971279 A JP 10971279A JP 10971279 A JP10971279 A JP 10971279A JP S5634795 A JPS5634795 A JP S5634795A
- Authority
- JP
- Japan
- Prior art keywords
- molecular weight
- viscosity
- catalyst
- copolymer
- viscosity improver
- 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
- Lubricants (AREA)
Abstract
PURPOSE: To obtain a viscosity improver having improved detergency and dispersibility, and capable of stabilizing the viscosity-temperature relationship continuously, by grafting a monomer containing a nitrogen atom onto ethylene-propylene copolymer with a tubular reactor.
CONSTITUTION: (A) A solution of 25W60wt% ethylene-propylene copolymer in benzene or a halogenated aromatic hydrocarbon (viscosity: 10,000W500,000cp at 80°C) is mixed and dissolved in (B) a monomer containing a nitrogen atom and (C) an organic peroxide catalyst at such a temperature as not to decompose the catalyst (C) to give a mixture. The resultant mixture is passed through a tubular reactor and decomposed at the decomposition temperature of the catalyst or above to graft the monomer onto the copolymer. Thus, the aimed dispersion type viscosity improver is obtained. The copolymer in the component (A) preferably has a propyrene content of 25W50mol%, a weight-average molecular weight of 20,000W 300,000 and a molecular weight ratio (weight-average to number-average molecular weight) ≤5.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10971279A JPS5634795A (en) | 1979-08-30 | 1979-08-30 | Continuous preparation of dispersion type viscosity improver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10971279A JPS5634795A (en) | 1979-08-30 | 1979-08-30 | Continuous preparation of dispersion type viscosity improver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5634795A true JPS5634795A (en) | 1981-04-07 |
Family
ID=14517300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10971279A Pending JPS5634795A (en) | 1979-08-30 | 1979-08-30 | Continuous preparation of dispersion type viscosity improver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5634795A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3687849A (en) * | 1968-06-18 | 1972-08-29 | Lubrizol Corp | Lubricants containing oil-soluble graft polymers derived from degraded ethylene-propylene interpolymers |
JPS5218705A (en) * | 1975-07-31 | 1977-02-12 | Rohm & Haas | Lubricating oil composition |
-
1979
- 1979-08-30 JP JP10971279A patent/JPS5634795A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3687849A (en) * | 1968-06-18 | 1972-08-29 | Lubrizol Corp | Lubricants containing oil-soluble graft polymers derived from degraded ethylene-propylene interpolymers |
JPS5218705A (en) * | 1975-07-31 | 1977-02-12 | Rohm & Haas | Lubricating oil composition |
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