Hydrogenated diolefin-lower alkyl acrylate or methacrylate visco

Details Hydrogenated diolefin-lower alkyl acrylate or methacrylate visco Hydrogenated diolefin-lower alkyl acrylate or methacrylate visco

1982-12-30

1985-08-06

Howard, Jacqueline V.

Compositions

Electrolytes for electrical devices

5253303, 525338, 585 12, C10M 128

Patent

active

045334820

ABSTRACT:
This invention relates to hydrogenated diolefin-lower alkyl acrylate or methacrylate copolymers and the use of these copolymers to improve the viscosity index (VI) of lubricating oils. The preferred copolymer is a fully hydrogenated, high molecular weight copolymer of 1,3-butadiene and methyl methacrylate containing at least about 71 mole percent 1,3-butadiene. A pour point depressant, VI improving polymer additive for lubricating oils is provided by incorporating a higher alkyl methacrylate in the copolymer. Further, a dispersant VI improving copolymer for lubricating oils and a dispersant for hydrocarbon fuels prepared by graft polymerizing a polar, nitrogen-containing graft monomer onto the VI improver or pour point depressant VI improver is also provided.

REFERENCES:
patent: 2693461 (1954-11-01), Jones
patent: 4069180 (1978-01-01), Chalmers
patent: 4207409 (1980-06-01), Ladenberger et al.

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