Polymer for lubricant compositions and method of forming the same

Patent metadata

Field	Value
Publication number	US-9862909-B2
Application number	US-201314420844-A
Country	US
Kind code	B2
Filing date	Aug 14, 2013
Priority date	Aug 14, 2012
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

A polymer comprises a polymeric backbone, at least one piperidine ester moiety extending from the polymeric back-bone, and generally at least one C 8 to C 22 ester moiety extending from the polymeric backbone. The polymer is useful for adjusting the total base number and viscosity index of a lubricant composition. The lubricant composition generally comprises a base oil in addition to the polymer. A method of forming the polymer comprises the steps of providing a first component and providing a second component. The first component comprises at least one of A1) a piperidine methacrylate, or A2) a methacrylate. The second component comprises at least one of B) a C 8 to C 22 methacrylate. Optionally, the method further comprises the step of providing a third component, which comprises at least one of C) a piperidine-ol. The method further comprises at least one reaction step involving the aforementioned components to form the polymer.

First claim

What is claimed is:

1. A lubricant composition comprising:
a base oil; and
a polymer for adjusting the total base number (TBN) and viscosity index (VI) of said lubricant composition, said polymer is of general formula (III);

wherein R 1 is a hydrogen or a methyl group (CH 3 ), each R 2 is a CH 3 , each R 3 is a hydrogen or a methyl group (CH 3 ) or an ethyl group (CH 2 CH 3 ) or a propyl group (CH 2 CH 2 CH 3 ) or an isopropyl group (CH(CH 3 ) 2 , each of R 4 and R 5 is independently a hydrogen or a CH 3 , n is equal to 7, 9, 11, 13, 15, or 17, m≧1, 0.15≦x≦0.25 and 0.75≦y≦0.85, and x+y=1; and
wherein said polymer is present in an amount of from about 1 to about 10 wt% based on the total weight of said lubricant composition.

2. The lubricant composition as set forth in claim 1 wherein R 1 is a hydrogen.

3. The lubricant composition as set forth in claim 1 wherein:
i) R 1 is a hydrogen, each of R 4 and R 5 is a CH 3 , and n is 9, 11, 13, or 15 in general formula (III).

4. The lubricant composition as set forth in claim 1 wherein said polymer has a weight average molecular weight (Mw) of at least about 20,000.

5. The lubricant composition as set forth in claim 1 wherein said base oil:
i) is selected from the group of American Petroleum Institute (API) Group I base oils, API Group II base oils, API Group III base oils, API Group IV base oils, API Group V base oils, and combinations thereof;
ii) has a viscosity of from about 1 to about 100 cSt at 100° C. according to ASTM D2270; or
iii) both i) and ii).

6. The lubricant composition as set forth in claim 1 wherein said polymer:
i) provides from about 1 to about 8 mg KOH per gram sample according to ASTM D2896.

7. The lubricant composition as set forth in claim 1 , having:
i) a total TBN of from about 2.5 to about 25 according to ASTM D2896;
ii) a VI of from about 95 to about 220 according to ASTM D2270; or
iii) both i) and ii).

Assignees

• Basf Se

Inventors

• Hoey Michael D
• Scanlon Eugene F
• Su Kai

Classifications

• C10N2030/02

  Pour-point; Viscosity index · CPC title

• C10N2020/04

  Molecular weight; Molecular weight distribution · CPC title

• C10N2030/52

  Base number [TBN] · CPC title

• C10M2205/026

  Butene · CPC title

• C10M2205/022

  Ethene · CPC title