Hydrocarbon compositions containing polyolefin graft polymers
AssigneeTexaco Inc.
InventorsChristopher S. Liu, Benjamin J. Kaufman, Maria M. Kapucinski
Life of this patent
Estimating the term…
Abstract
Lubricating oil compositions of improved dispersancy contain an ethylene-propylene copolymer grafted onto which is acrylic acid dimer, the free carboxyl group of which has thereafter been amidized with diethylene triamine.
Claims24
A linear, substantially oil-soluble polymer having a carbon-carbon backbone bearing a graft moiety derived from, as graft monomer, a carboxy saturated-hydrocarbyl ester of a carboxylic acid containing an ethylenically unsaturated carbon-carbon double bond.
A linear, substantially oil-soluble polymer having a carbon-carbon backbone onto which has been grafted, as graft monomer, a carboxy saturated-hydrocarbyl ester of a carboxylic acid containing an ethylenically unsaturated carbon-carbon double bond, the free carboxyl group of which, after grafting, has been amidized, by reaction with amine.
The method of preparing a polymer composition containing a carbon-carbon backbone which comprises
- introducing a polymer containing a carbon-carbon backbone into a reaction mixture;
- introducing into said reaction mixture, as graft monomer, a carboxy saturated-hydrocarbyl ester of a carboxylic acid containing an ethylenically unsaturated carbon-carbon double bond;
- maintaining said reaction mixture at graft polymerization reaction conditions in the presence of free-radical graft polymerization catalyst thereby forming graft polymer including a linear polymer having a carbon-carbon backbone bearing, as graft moiety, a carboxy saturated-hydrocarbon (carboxy hydrocarbyl) group;
- and
- recovering said linear polymer having a carbon-carbon backbone bearing, as graft moiety, a carboxy saturated-hydrocarbon (carboxy hydrocarbyl) group.
The method of preparing a polymer composition containing a carbon-carbon backbone which comprises
- introducing a polymer containing a carbon-carbon backbone into a reaction mixture;
- introducing into said reaction mixture, as graft monomer, a carboxy saturated-hydrocarbyl ester of a carboxylic acid containing an ethylenically unsaturated carbon-carbon double bond;
- maintaining said reaction mixture at graft polymerization reaction conditions in the presence of free-radical graft polymerization catalyst thereby forming graft polymer including a linear polymer having a carbon-carbon backbone bearing, as graft moiety, a carboxy saturated-hydrocarbon (carboxy hydrocarbyl) group;
- and
- reacting said linear polymer having a carbon-carbon backbone bearing, as graft moiety, a carboxy saturated-hydrocarbon (carboxy hydrocarbyl) group with an amine thereby forming a graft polymer composition containing a carbon-carbon backbone and bearing, as graft moiety, a carboxy saturated-hydrocarbon (carboxy hydrocarbyl) group which has been amidized after grafting;
- and recovering said graft polymer.
A concentrate containing an inert diluent-solvent and a linear, substantially oil-soluble polymer having a carbon-carbon backbone bearing, a graft moiety derived from, as graft monomer, a carboxy saturated-hydrocarbyl ester of a carboxylic acid containing an ethylenically unsaturated carbon-carbon double bond which has been amidized after grafting.
A lubricating oil composition comprising a major portion of a lubricating oil and a minor effective amount of a linear, substantially oil-soluble polymer having a carbon-carbon backbone bearing, a graft moiety derived from as graft monomer, a carboxy saturated hydrocarbyl ester of a carboxylic acid containing an ethylenically unsaturated carbon-carbon double bond.
A lubricating oil composition comprising a major portion of a lubricating oil and a minor effective portion of a linear, substantially oil-soluble polymer having a carbon-carbon backbone onto which has been grafted, as graft monomer, a carboxy saturated-hydrocarbyl ester of a carboxylic acid containing an ethylenically unsaturated carbon-carbon double bond, the free carboxyl group of which has been amidized after grafting.
A lubricating oil composition comprising a major portion of a lubricating oil and a minor effective portion of a copolymer of ethylene-propylene or of ethylene-propylene-third monomer onto which has been grafted acrylic acid dimer, the free carboxyl group of which has, after grafting, been amidized by reaction with diethylene tetramine.
Dependencies are inferred from the claim text.