Star-branched polymers and functional fluids prepared therefrom

Details Star-branched polymers and functional fluids prepared therefrom Star-branched polymers and functional fluids prepared therefrom

1994-05-16

1996-02-06

Jagannathan, Vasu S.

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

Synthetic resins

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

525242, 525271, 525316, C08F25702

Patent

active

054896495

ABSTRACT:
Novel star-branched polymers in which the arms are each a polymer of an anionically polymerizable monomer consisting of monoethylenically unsaturated compounds comprising p-tert-butylstyrene (t-BS) coupled with a polyalkenyl coupling agent. Certain of the foregoing star-branched polymers, e.g., wherein the arms are a homopolymer of t-BS and the coupling agent is divinylbenzene (DVB), are useful as additives to functional fluids, particularly hydrocarbon lubricating oils, for the purpose of improving their viscometric properties.

REFERENCES:
patent: 3318813 (1967-05-01), McCormick et al.
Eschevey et al "Star Polymers from styrene and divinylbenzene." Polymer, vol. 16 (1975), pp. 180-184.
Sutz et al "New developments in star polymer synthesis." Makromol. Chem., vol. 189 (1988), pp. 1051-1060.

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