Viscosity index improver

Details Viscosity index improver Viscosity index improver

1992-06-11

1994-09-06

Schofer, Joseph L.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524352, 524353, C08K 509

Patent

active

053448634

ABSTRACT:
A viscosity index improver which contains a polymer dispersion comprising: a polyolefin having a weight average molecular weight of 10,000 to 500,000, a dispersant comprising a reaction product of an ethylenically unsaturated dicarboxylic acid added polyolefin with a carboxylic acid-reactive compound selected from the group consisting of an amine, a ketimine compound, an alcohol and an isocyanate compound and an organic liquid medium comprising a liquid phenolic derivative selected from the group consisiting of an alkyl phenol and an alkyl salicylate.

REFERENCES:
patent: 4603189 (1986-07-01), Ishii
patent: 4665121 (1987-05-01), Pennewiss et al.
patent: 4677151 (1987-06-01), Pennewiss et al.

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