Process for making polyalkylene/maleic anhydride copolymer
AssigneeChevron Oronite Company LLC
InventorsJames J. Harrison, William R. Ruhe, Jr.
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Abstract
A process is provided for preparing a mixture of (1) a copolymer of a polyalkene and an unsaturated acidic reagent and (2) a polyalkenyl derivative of an unsaturated acidic reagent, said process comprising (a) copolymerizing (1) a polyalkene containing alkylvinylidene isomer and non-alkylvinylidene isomers and (2) an unsaturated acidic reagent under polymerization conditions in the presence of a free radical initiator; and (b) reacting the product of step (a) with an unsaturated acidic reagent at elevated temperature in the presence of a strong acid. The product of the process can be used to make polysuccinimides that are useful in lubricating oil compositions.
Claims17
A water-in-oil emulsion comprising a discontinuous aqueous phase comprising at least one oxygen-supplying component, a continuous organic phase comprising at least one carbonaceous fuel, and a minor emulsifying amount of at least one emulsifier comprising the product produced by a process comprising (a) copolymerizing (1) a polyalkene containing alkylvinylidene isomer and non-alkylvinylidene isomers and (2) an unsaturated acidic reagent under polymerization conditions in the presence of a free radical initiator, (b) reacting the product of step (a) with an unsaturated acidic reagent at elevated temperature in the presence of a strong acid, and (c) reacting the product of step (b) with ammonia or at least one amine.
A product produced by a process comprising:
- (a) copolymerizing (1) a polyalkene containing alkylvinylidene isomer and non-alkylvinylidene isomers and (2) an unsaturated acidic reagent under polymerization conditions in the presence of a free radical initiator;
- (b) reacting the product of step (a) with an unsaturated acidic reagent at elevated temperature in the presence of a strong acid;
- (c) reacting the product of step (b) with a low molecular weight succinic anhydride;
- and
- (d) reacting the product of step (c) with a polyamine having at least two basic nitrogens.
A process for preparing a succinimide comprising:
- (a) copolymerizing (1) a polyalkene containing alkylvinylidene isomer and non-alkylvinylidene isomers and (2) an unsaturated acidic reagent under polymerization conditions in the presence of a free radical initiator;
- (b) reacting the product of step (a) with an unsaturated acidic reagent at elevated temperature in the presence of a strong acid;
- (c) reacting the product of step (b) with a low molecular weight succinic anhydride;
- and
- (d) reacting the product of step (c) with a polyamine having at least two basic nitrogens.
A polysuccinimide prepared by:
- (a) reacting a mixture, comprising (1) a copolymer of a polyalkene and an unsaturated acidic reagent and (2) a polyalkenyl derivative of an unsaturated acidic reagent wherein the weight ratio of copolymer to polyalkenyl derivative of an unsaturated acidic reagent is about 0.1-10, with (3) a low molecular weight succinic anhydride;
- and
- (b) reacting the product of step (a) with a one polyamine having at least two basic nitrogens.
Dependencies are inferred from the claim text.