Block copolymers of hydrogenated diene-styrene with polymerized

Details Block copolymers of hydrogenated diene-styrene with polymerized Block copolymers of hydrogenated diene-styrene with polymerized

1974-06-24

1976-05-04

Tillman, Murray

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252 334, 252 336, 252 421, 252 475, 252 486, 252 496, 252 515R, 252 52A, 252 56R, 260827, 260874, C08L 906, C08L 4304, C10M 140

Patent

active

039549151

ABSTRACT:
Novel block copolymers containing at least two segments, in which segment A is either a polymerized alkyl-substituted styrene, the alkyl group having at least 3 carbon atoms, or a hydrogenated block of random butadiene-styrene copolymer and from 1 to about 50% by weight of segment B being an alkylene oxide or sulfide copolymerized with the first segment as an AB or BAB copolymer, perform as multifunctional additives in industrial organic compositions, both hydrocarbon fluids, such as petroleum-derived, and non-hydrocarbon, or synthetic fluids, providing such utility as detergency and viscosity index improvement. These copolymers have molecular weights in the range of from about 1,000 to 300,000. The copolymers are particularly useful in lubricating oils, greases and fuels, especially cross-graded lubricants, Diesel oils, gasoline and fuel oils. Copolymers capped with metal diisocyanate have excellent thermal and oxidative stability.

REFERENCES:
patent: 3050511 (1962-08-01), Szwarc
patent: 3219725 (1965-11-01), Kirkland et al.
patent: 3404092 (1968-10-01), Jacobson et al.
patent: 3640971 (1972-02-01), Katayama et al.
patent: 3766300 (1973-10-01), De La Mare
patent: 3791971 (1974-02-01), Lowe
patent: 3792005 (1974-02-01), Harlan
patent: 3836600 (1974-09-01), Brewbaker et al.

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