Lube oil additive

Details Lube oil additive Lube oil additive

1980-10-31

1982-11-09

Hamrock, William F.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525279, 525281, 252 50, 252 515R, C08F25502, C10M 132, C10M 326, C10M 520

Patent

active

043585655

ABSTRACT:
A modified hydrogenated star-shaped polymer comprising a nucleus, e.g., divinylbenzene, with polymeric arms linked to it is prepared by grafting a hydrogenated star-shaped polymer with a nitrogen-containing polymerizable polar organic compound, e.g., 2-vinylpyridine or 4-vinylpyridine. Such polymers are useful as viscosity index improvers for lube oil compositions, and also possess dispersancy.

REFERENCES:
patent: 3763044 (1973-10-01), Anderson
patent: 3772196 (1973-11-01), St. Clair et al.
patent: 3864268 (1975-02-01), Culbertson et al.
patent: 4077893 (1978-03-01), Kiovsky
patent: 4116917 (1978-09-01), Eckert
patent: 4141847 (1979-02-01), Kiovsky
patent: 4281081 (1981-07-01), Jost et al.
patent: 4282132 (1981-08-01), Benda et al.

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