JPS5634795A - Continuous preparation of dispersion type viscosity improver - Google Patents

Continuous preparation of dispersion type viscosity improver

Info

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
Application number
JP10971279A
Other languages
Japanese (ja)
Inventor
Toshiyuki Yamauchi
Ichiro Sasaki
Yoshio Takeuchi
Teruhisa Furushima
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.)
Ube Corp
Original Assignee
Ube Industries 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 Ube Industries Ltd filed Critical Ube Industries Ltd
Priority to JP10971279A priority Critical patent/JPS5634795A/en
Publication of JPS5634795A publication Critical patent/JPS5634795A/en
Pending legal-status Critical Current

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  • 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
JP10971279A 1979-08-30 1979-08-30 Continuous preparation of dispersion type viscosity improver Pending JPS5634795A (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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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