Dispersant terpolymers

• US 5,792,729 A
• Filed: 08/20/1996
• Issued: 08/11/1998
• Est. Priority Date: 08/20/1996
• Status: Expired due to Term

• Current Assignee: Chevron Chemical Company (Chevron Corp.)
• Original Assignee: Chevron Chemical Corp (Chevron Corp.)
• Inventors: Harrison, James J., Ruhe, William R. Jr.
• Primary Examiner(s): Johnson, Jerry D.
• Application Number:
  US08/699,752
• Time in Patent Office: 721 Days
• Field of Search: 525/285, 525/379, 525/380, 525/381, 525/382, 525/277, 525/327.4, 525/327.6, 525/337, 526/271, 526/318.25, 526/318.6, 508/192, 508/287, 508/290, 508/291, 508/293
• US Class Current: 508/192
• CPC Class Codes: C08F 210/14 Monomers containing five or more carbon atoms
• CPC Class Codes: C08F 222/06 Maleic anhydride

Abstract

A terpolymer having an average M_n of from 600 to 100,000 is obtained by the terpolymerization of a 1-olefin having from 10 to 30 carbon atoms, maleic anhydride, and a 1,1 -disubstituted polyisobutylene having an average M_n of from 500 to 5,000.

Claims

1. A terpolymer composition comprising the reaction product obtained by the terpolymerization of a 1-olefin having at least five carbon atoms, an unsaturated acidic reagent, and a 1,1-disubstituted olefin.

2. A terpolymer according to claim 1 wherein said 1-olefin has an average of from 10 to 30 carbon atoms.

3. A terpolymer according to claim 1 wherein said unsaturated acidic agent is maleic anhydride.

4. A terpolymer according to claim 1 wherein said terpolymer has an average M_n of from 600 to 100,000.

5. A process for preparing a polysuccinimide which comprises reacting a mixture under reactive conditions, wherein the mixture comprises:

(a) the terpolymer according to claim 1; and

(b) a nitrogen-containing compound selected from the group consisting of an amine and a polyamine.

wherein said mixture contains from 0.1 to 1.5 equivalents of said nitrogen-containing compound per equivalent of acidic groups in said terpolymer.

6. A process for preparing a polysuccinimide according to claim 5 wherein said nitrogen-containing compound is a polyamine having at least three nitrogen atoms and 4 to 20 carbon atoms.

7. A process for preparing a polysuccinimide according to claim 5 wherein the reaction mixture further comprises at least one of the following:

(a) an alkenyl or alkylsuccinic acid derivative,

(b) a copolymer of a first unsaturated acidic reagent and a 1-olefin,

(c) a copolymer of a second unsaturated acid reagent and a 1,1-disubstituted olefin,

(d) a polycarboxylic acid derivative, and

(e) mixtures thereof;

wherein the first unsaturated acidic reagent and the second unsaturated acidic reagent are the same or different.

8. A concentrate comprising from 20 to 60 wt. % of a polysuccinimide prepared by the process of claim 5 and from 80 to 40 wt. % of an organic diluent.

9. A lubricating oil composition comprising a major amount of an oil of lubricating viscosity and a minor amount of a polysuccinimide composition prepared by the process of claim 5.

10. A post-treated polymer prepared by treating a polysuccinimide prepared by the process of claim 5 under reactive conditions with a boron compound selected from the group consisting of boron oxide, boron halide, boric acid, and esters of boric acid.

11. A post-treated polysuccinimide composition prepared by treating a polysuccinimide prepared by the process of claim 5 with a cyclic carbonate or a linear mono- or poly-carbonate under reactive conditions.

12. The post-treated polysuccinimide composition of claim 11 wherein said cyclic carbonate is ethylene carbonate.

13. A lubricating oil composition comprising a major amount of an oil of lubricating viscosity and a minor amount of the post-treated polysuccinimide composition of claim 11.

14. A concentrate comprising from 20 to 60 wt. % of the post-treated polysuccinimide composition of claim 11 and from 80 to 40 wt. % of an organic diluent.

15. A terpolymer composition comprising the reaction product obtained by the terpolymerization of a 1-olefin having at least five carbon atoms, an unsaturated acidic reagent, and a 1,1-disubstituted olefin, wherein said 1,1-disubstituted olefin has an average Mn of from 500 to 5,000.

16. A terpolymer according to claim 15 wherein said 1,1-disubstituted olefin is a 1,1-disubstituted polyisobutylene.