Lubricating oil additives

Details Lubricating oil additives Lubricating oil additives

1979-07-18

1980-10-21

Clingman, A. Lionel

Compositions

Electrolytes for electrical devices

252 56R, 260 302, 260 324, 260 336UA, 526258, C10M 132, C08K 501

Patent

active

042293111

ABSTRACT:
What is disclosed are methods for making polymer-in-oil solutions, useful for improving the viscosity-temperature relationship and low-temperature properties of lubricating oils when added thereto, which methods comprise polymerizing a methacrylic acid ester of an alcohol having 8 to 18 carbon atoms onto a polyolefin polymer of an olefinic hydrocarbon monomer having 2 to 4 carbon atoms in an oil solution of the polyolefin and ester monomers, then adding further polyolefin polymer to the solution and finally graft copolymerizing a polymerizable heterocyclic compound having a basic nitrogen atom in the ring thereof onto the resulting mixed polymers as backbone polymers or, in the alternative, separately graft copolymerizing a polymerizable heterocyclic compound having a basic nitrogen atom in the ring thereof onto a first backbone polymer which is itself a graft copolymer, in an oil solution, of a methacrylic acid ester of an alcohol having 8 to 18 carbon atoms on a polyolefin polymer of an olefinic hydrocarbon monomer having two to four carbon atoms and further graft copolymerizing a polymerizable heterocyclic compound having a basic nitrogen atom in the ring thereof onto a polyolefin polymer of the type described above and then combining the two graft copolymers thus formed to produce the desired polymer-in-oil solution.

REFERENCES:
patent: 2540984 (1951-02-01), Jackson
patent: 4146489 (1979-03-01), Stambaugh et al.
patent: 4149984 (1979-04-01), Wenzel et al.
patent: 4161452 (1979-07-01), Stambagh et al.

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