Lubricating oil additives

Details Lubricating oil additives Lubricating oil additives

1979-08-06

1981-08-04

Hamrock, William F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

252 515R, 252 515A, 260 312N, 260 324, 260 326A, 260 336AQ, 525279, 525280, 525282, C10M 132, C10M 326, C10M 520, C10M 730

Patent

active

042821320

ABSTRACT:
What is disclosed is a method for making a lubricating oil additive which comprises a first step of graft copolymerizing an alkyl ester of acrylic acid or of methacrylic acid, alone or in combination with styrene, onto a backbone copolymer which is hydrogenated block copolymer of styrene and a conjugated diene having 4 to 6 carbon atoms to form a first graft copolymer, and a second step of graft copolymerizing a polymerizable heterocyclic monomer, alone or in combination with a hydrophobizing vinyl ester, onto said first graft copolymer to form a second graft copolymer, and the lubricating oil additive so made.

REFERENCES:
patent: 3775329 (1973-11-01), Eckert
patent: 4033888 (1977-05-01), Kiovsky
patent: 4085055 (1978-04-01), Durand et al.
patent: 4145298 (1979-03-01), Trepka
patent: 4146489 (1979-03-01), Stambaugh
patent: 4187202 (1980-02-01), Kondo et al.
patent: 4229311 (1980-10-01), Wenzel et al.

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