Functionalized polymers and oligomers as corrosion inhibitors and antiwear additives

Patent metadata

Field	Value
Publication number	US-9487729-B2
Application number	US-201314060149-A
Country	US
Kind code	B2
Filing date	Oct 22, 2013
Priority date	Oct 24, 2012
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

Provided are lubricant compositions and hydrocarbon fluids including one or more lubricant base stocks and an effective amount of one more zero SAP antiwear additives and/or corrosion inhibitor additives, wherein the one more antiwear and/or corrosion inhibitor additives include one or more functionalized polyolefins having one or more pyridazine moieties. Such compositions exhibit improved anti-wear, friction reduction and anti-corrosion properties.

First claim

What is claimed is:

1. A lubricant composition comprising one or more lubricant base oils and an effective amount of at least one zero SAP antiwear and/or corrosion inhibitor additive comprising a functionalized polyolefin including one or more pyridazine moieties according to the following formulae:

wherein R 1 comprises a polyolefin chain attached to the pyridazine moiety through an aliphatic linkage; and
wherein R 2 and R 3 each comprise H;
wherein the functionalized polyolefin number average molecular weight ranges from 200 to 10,000.

2. The lubricant composition of claim 1 , wherein the pyridazine moiety is a terminal moiety of the polyolefin chain.

3. The lubricant composition of claim 1 , wherein R 1 comprises a C 2-20 poly-alpha-olefin having a weight average molecular weight of greater than or equal to about 2,500 g/mol.

4. The lubricant composition of claim 1 , wherein R 1 is derived from polyethylene, polypropylene, polybutadiene, butyl rubber, or a combination thereof.

5. The lubricant composition of claim 1 , wherein R 1 is derived from one or more of:
(i) a vinyl terminated polymer having at least 5% allyl chain ends;
(ii) a vinyl terminated polymer having an Mn of at least 200 g/mol (measured by 1 H NMR) comprising of one or more C 4 to C 40 higher olefin derived units, where the higher olefin polymer comprises substantially no propylene derived units; and wherein the higher olefin polymer has at least 5% allyl chain ends;
(iii) a copolymer having an Mn of 300 g/mol or more (measured by 1 H NMR) comprising (a) from about 20 mol % to about 99.9 mol % of at least one C 5 to C 40 higher olefin, and (b) from about 0.1 mol % to about 80 mol % of propylene, wherein the higher olefin copolymer has at least 40% allyl chain ends;
(iv) a copolymer having an Mn of 300 g/mol or more (measured by 1 H NMR), and comprises (a) from about 80 mol % to about 99.9 mol % of at least one C 4 olefin, (b) from about 0.1 mol % to about 20 mol % of propylene; and wherein the vinyl terminated macromonomer has at least 40% allyl chain ends relative to total unsaturation;
(v) a co-oligomer having an Mn of 300 g/mol to 30,000 g/mol (measured by 1 H NMR) comprising 10 mol % to 90 mol % propylene and 10 mol % to 90 mol % of ethylene, wherein the oligomer has at least X % allyl chain ends (relative to total unsaturations), where: 1) X=(−0.94*(mol % ethylene incorporated)+100), when 10 mol % to 60 mol % ethylene is present in the co-oligomer, 2) X=45, when greater than 60 mol % and less than 70 mol % ethylene is present in the co-oligomer, and 3) X=(1.83* (mol % ethylene incorporated) −83), when 70 mol % to 90 mol % ethylene is present in the co-oligomer;
(vi) a propylene oligomer, comprising more than 90 mol % propylene and less than 10 mol % ethylene wherein the oligomer has: at least 93% allyl chain ends, a number average molecular weight (Mn) of about 500 g/mol to about 20,000 g/mol, an isobutyl chain end to allylic vinyl group ratio of 0.8:1 to 1.35:1.0, and less than 100 ppm aluminum;
(vii) a propylene oligomer, comprising: at least 50 mol % propylene and from 10 mol % to 50 mol % ethylene, wherein the oligomer has: at least 90% allyl chain ends, an Mn of about 150 g/mol to about 10,000 g/mol, and an isobutyl chain end to allylic vinyl group ratio of 0.8:1 to 1.2:1.0, wherein monomers having four or more carbon atoms are present at from 0 mol % to 3 mol %;
(viii) a propylene oligomer, comprising: at least 50 mol % propylene, from 0.1 mol % to 45 mol % ethylene, and from 0.1 mol % to 5 mol % C 4 to C 12 olefin, wherein the oligomer has: at least 90% allyl chain ends, an Mn of about 150 g/mol to about 10,000 g/mol, and an isobutyl chain end to allylic vinyl group ratio of 0.8:1 to 1.35:1.0;
(ix) a propylene oligomer, comprising: at least 50 mol % propylene, from 0.1 mol % to 45 mol % ethylene, and from 0.1 mol % to 5 mol % diene, wherein the oligomer has: at least 90% allyl chain ends, an Mn of about 150 g/mol to about 10,000 g/mol, and an isobutyl chain end to allylic vinyl group ratio of 0.7:1 to 1.35:1.0; and
(x) a homo-oligomer, comprising propylene, wherein the oligomer has: at least 93% allyl chain ends, an Mn of about 500 g/mol to about 20,000 g/mol, an isobutyl chain end to allylic vinyl group ratio of 0.8:1 to 1.2:1.0, and less than 1400 ppm aluminum.

6. The lubricant composition of claim 1 , wherein the one or more lubricant base oils range from 50 to 99 wt % of the composition.

7. The lubricant composition of claim 1 , wherein the effective amount of at least one zero SAP antiwear and/or corrosion inhibitor additive ranges from 10 ppm to 10 wt. % of the composition.

8. The lubricant composition of claim 1 , wherein the one or more lubricant base oils are selected from the group consisting of API Group I, Group II, Group III, Group IV, Group V base stocks and combinations thereof.

9. The lubricant composition of claim 1 , further including one or more additives selected from the group consisting of oxidation inhibitors, metallic and non-metallic dispersants, metallic and non-metallic detergents, metal deactivators, anti-seizure agents, pour point depressants, wax modifiers, viscosity modifiers, seal compatibility agents, lubricity agents, anti-staining agents, chromophoric agents, defoamants, demulsifiers, and combinations thereof.

10. The lubricant composition of claim 9 , wherein the one or more additives range from 1 to 20 wt % of the composition.

11. The lubricant composition of claim 1 , wherein the functionalized polyolefin is amorphous.

12. The lubricant composition of claim 1 , further including from 0.5 to 10 wt % graphite, graphene or combinations thereof.

13. A lubricant composition comprising one or more lubricant base oils and an effective amount of at least one zero SAP antiwear and/or corrosion inhibitor additive comprising a functionalized polyolefin including one or more pyridazine moieties according to the following formulae:

wherein R 1 comprises a polyolefin chain attached to the pyridazine moiety through an aliphatic linkage, and wherein R 2 and R 3 each comprise H, wherein the pyridazine moiety is the cyclo-addition reaction product of a non-aromatic carbon-carbon double bond attached to a backbone of the polyolefin chain through an aliphatic linkage, and a substituted or unsubstituted tetrazine;
wherein R 1 comprises a C 2-20 poly-alpha-olefin having a weight average molecular weight of greater than or equal to about 2,500 g/mol.

14. The lubricant composition of claim 13 , wherein the non-aromatic carbon-carbon double bond is a terminal vinyl functional group.

15. The lubricant composition of claim 13 , wherein R 1 is derived from polyethylene, polypropylene, polybutadiene, butyl rubber, or a combination thereof having a weight average molecular weight of greater than or equal to about 2500 g/mol.

16. The lubricant composition of claim 13 , wherein R 1 is derived from one or more of:
(i) a vinyl terminated polymer having at least 5% allyl chain ends;
(ii) a vinyl terminated polymer having an Mn of at least 200 g/mol (measured by 1 H NMR) comprising of one or more C 4 to C 40 higher olefin derived units, where the higher olefin polymer comprises substantially no propylene derived units; and wherein the higher olefin polymer has at least 5% allyl chain ends;
(iii) a copolymer having an Mn of 300 g/mol or

Assignees

• Exxonmobil Chemical Patents Inc

Inventors

• Haque Tabassumul
• Tsou Andy Haishung
• Jacobs Peter W
• Kulkarni Rahul Ravindra
• Crowther Donna Jean

Classifications

• C10N2030/56

  Boundary lubrication or thin film lubrication · CPC title

• C10M2203/1025

  used as base material · CPC title

• C10N2030/12

  Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives · CPC title

• C10N2030/43

  Sulfur free or low sulfur content compositions · CPC title

• C10N2030/06

  Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title