US 6,248,702 B1Granted

Dispersant and dispersant viscosity index improvers from selectively hydrogenated aryl-substituted olefin containing diene copolymers

AssigneeMobil Oil Corporation

InventorsThomas S. Coolbaugh, Frederick C. Loveless, John E. Marlin, II, Demetreos N. Matthews

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Abstract

The invention provides dispersants and dispersant viscosity index improvers which include polymers of conjugated dienes which have been hydrogenated, functionalized, optionally modified, and post treated. The dispersant substances include a copolymer of two different conjugated dienes and an aryl-substituted olefin. The polymers are selectively hydrogenated to produce polymers which have highly controlled amounts of unsaturation, permitting highly selective functionalization. Also provided are lubricant fluids, such as mineral and synthetic oils, which have been modified in their dispersancy and/or viscometric properties by means of the dispersant substances of the invention. Also provided are methods of modifying the dispersancy and/or viscometric properties of lubricating fluids such as mineral and synthetic lubricating oils. The dispersant substances may also include a carrier fluid to provide dispersant concentrates.

Claims30

Dependent claims

A dispersant substance for modifying the dispersancy or viscometric properties of a fluid, comprising:

a liquid copolymer of a first conjugated diene, a second conjugated diene and an aryl-substituted olefin, wherein:
said first conjugated diene comprises at least one relatively more substituted conjugated diene having at least five carbon atoms and the formula:
wherein R1-R6 are each hydrogen or a hydrocarbyl group, provided that at least one of R1-R6 is a hydrocarbyl group, provided that after polymerization, the unsaturation of the polymerized conjugated diene of formula (1) has the formula:
wherein RI, RII, RIII and RIV are each hydrogen or a hydrocarbyl group, provided that either both RI and RII are hydrocarbyl groups or both RIII and RIV are hydrocarbyl groups;
and
said second conjugated diene comprises at least one relatively less substituted conjugated diene different from the first conjugated diene and having at least four carbon atoms and the formula:
wherein R7-R12 are each hydrogen or a hydrocarbyl group, provided that after polymerization, the unsaturation of the polymerized conjugated diene of formula (3) has the formula:
wherein RV, RVI, RVII and RVIII are each hydrogen or a hydrocarbyl group, provided that one of RV or RVI is hydrogen, one of RVII or RVIII is hydrogen, and at least one of RV, RVI, RVII and RVIII is a hydrocarbyl group;
and
wherein the copolymer has been functionalized by a method comprising:
selectively hydrogenating the copolymer to provide a selectively hydrogenated copolymer;
and
functionalizing said selectively hydrogenated copolymer to provide a functionalized copolymer having at least one polar functional group.

10 more elements

A dispersant-modified fluid having modified dispersancy or viscometric properties comprising:

a fluid;
and
a dispersant substance comprising;
a liquid copolymer of a first conjugated diene and a second conjugated diene and an aryl-substituted olefin, wherein:
said first conjugated diene comprises at least one relatively more substituted conjugated diene having at least five carbon atoms and the formula:
wherein R1-R6 are each hydrogen or a hydrocarbyl group, provided that at least one of R1-R6 is a hydrocarbyl group, provided that after polymerization, the unsaturation of the polymerized conjugated diene of formula (1) has the formula:
wherein RI, RII, RIII and RIV are each hydrogen or a hydrocarbyl group, provided that either both RI and RII are hydrocarbyl groups or both RIII and RIV are hydrocarbyl groups;
and
said second conjugated diene comprises at least one relatively less substituted conjugated diene different from the first conjugated diene and having at least four carbon atoms and the formula:
wherein R7-R12 are each hydrogen or a hydrocarbyl group, provided that after polymerization, the unsaturation of the polymerized conjugated diene of formula (3) has the formula:
wherein RV, RVI, RVII and RVIII are each hydrogen or a hydrocarbyl group, provided that one of RV or RVI is hydrogen, one of RVII or RVIII is hydrogen, and at least one of RV, RVI, RVIII and RVIII is a hydrocarbyl group;
and
wherein the copolymer has been functionalized by a method comprising:
selectively hydrogenating the copolymer to provide a selectively hydrogenated copolymer;
and
functionalizing said selectively hydrogenated copolymer to provide a functionalized copolymer having at least one polar functional group.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/201,431Filed 30 Nov 1998 · continuation in part
Priority: 16 Jan 1990
Granted: 19 Jun 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification61 codes

C07C 15/40
Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts: substituted by unsaturated carbon radicals
C08C 19/00
Chemical modification of rubber
C08C 19/02
Chemical modification of rubber: hydrogenation
C08C 19/12
Chemical modification of rubber: incorporating halogen atoms into the molecule

Family

Application07/466,135Parent of this division · filed 16 Jan 1990
Application07/907,959Parent of this continuation · filed 6 Aug 1992
Application07/992,341Parent of this division · filed 17 Dec 1992
Application08/179,051Parent of this division · filed 7 Jan 1994
Application08/476,016Parent of this continuation-in-part · filed 7 Jan 1995
Application08/382,814Parent of this continuation-in-part · filed 3 Feb 1995
Application08/488,046Parent of this continuation-in-part · filed 7 Jun 1995
Application08/734,982Parent of this continuation-in-part · filed 22 Oct 1996
Application09/102,597Parent of this continuation-in-part · filed 23 Jun 1998
Application09/102,680Parent of this continuation-in-part · filed 23 Jun 1998
Application09/102,681Parent of this continuation-in-part · filed 23 Jun 1998
Application09/102,718Parent of this continuation-in-part · filed 23 Jun 1998
Application09/127,073Parent of this continuation-in-part · filed 31 Jul 1998
US 6,162,768 AParent of this continuation-in-part
US 6,034,184 AParent of this continuation-in-part
US 6,103,676 AParent of this continuation-in-part
US 6,054,539 AParent of this continuation-in-part
US 5,780,540 AParent of this continuation-in-part
US 5,633,415 AParent of this continuation-in-part
US 5,637,783 AParent of this continuation-in-part
US 5,545,783 AParent of this continuation-in-part
Application08/382,814Parent of this division
US 5,387,730 AParent of this division
US 5,288,937 AParent of this division
Application07/992,341Parent of this continuation
US 5,210,359 AParent of this continuation
Application07/907,959Parent of this division
US 5,149,895 AParent of this division
US 6,228,817 B1Related patent
US 6,248,702 B1This patent

From the US filing history. Foreign family members aren’t listed.