Dispersant viscosity modifiers based on diene-containing polymers
AssigneeThe Lubrizol Corporation
InventorsChristopher Kolp, Matthew D. Gieselman, Renee A. Eveland, Philip Pike, John K. Pudelski, Michael J. Covitch, Christopher Friend
Life of this patent
Estimating the term…
Abstract
A composition of the reaction product of (a) an isobutylene-diene copolymer having thereon groups containing carboxylic acid functionality or reactive equivalent thereof, derived from an α,β-unsaturated carboxylic compound; and (b) an amine component comprising at least one aromatic amine containing at least one N—H group capable of condensing with said carboxylic acid functionality, is a useful dispersant viscosity modifier.
Claims23
A composition comprising the reaction product of:
- (a) an isobutylene-diene copolymer having an Mn of about 1000 to about 150,000 and containing thereon an average of about 0.1 to 4 equivalents, per each 1000 units of Mn of the polymer, of carboxylic acid functionality or reactive equivalent thereof, derived from at least one α,β-unsaturated carboxylic compound;
- and
- (b) an amine component comprising 4-aminodiphenylamine.
A process for preparing a carboxylic derivative composition, comprising:
- (a) reacting
- (i) an isobutylene-diene copolymer having an Mn of about 1000 to about 150,000 and having on average about 0.1 to about 2 units of reactive carbon-carbon double bonds per each 1000 units of Mn of the polymer, with
- (ii) an α,β-unsaturated carboxylic compound having carboxylic acid functionality or reactive equivalent thereof;
- and
- (b) reacting the product of (a) with an amine component comprising 4-aminodiphenylamine.
A composition comprising the reaction product of:
- (a) an isobutylene-diene copolymer having an Mn of about 1000 to about 150,000 and containing thereon an average of about 0.1 to 4 equivalents, per each 1000 units of Mn of the polymer, of carboxylic acid functionality or reactive equivalent thereof, derived from at least one α,β-unsaturated carboxylic compound;
- and
- (b) an amine component comprising 3-nitroaniline.
Dependencies are inferred from the claim text.