申请人:EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
公开号:US20190127656A1
公开(公告)日:2019-05-02
Disclosed in certain embodiments is a lubricating oil composition comprising an antioxidant polymer (e.g., oligomer) composition comprising repeat units of diphenylamine monomers of formula I
wherein
R is H, C
1
-C
18
alkyl, C
2
-C
18
alkenyl, C
2
-C
18
alkynyl, —C(O)C
1
-C
18
alkyl, —C(O)aryl and R
1
, R
2
, R
3
and R
4
are each independently H or a linear or branched C
1
-C
18
alkyl, C
1
-C
18
alkoxy, C
1
-C
18
alkylamino, C
1
-C
18
dialkylamino, C
1
-C
18
alkylthio, C
2
-C
18
alkenyl, C
2
-C
18
alkynyl or C
7
-C
21
aralkyl and
wherein
the number average molecular weight (Mn) of the polymer composition is from about 350 g/mol to about 5000 g/mol.