公开(公告)号：US20190127526A1

公开(公告)日：2019-05-02

申请号：US16175267

申请日：2018-10-30

Applicant: BASF SE

Inventor： Liehpao Oscar Farng ,  Graciela Sanchez Jimenez ,  Mary Dery ,  Paul Odorisio ,  Bridgett Rakestraw ,  Sai Shum ,  David Khoshabo ,  Michael L. Alessi ,  Rebecca Cristine Vieira ,  Andrew Edmund Taggi

IPC: C08G73/02 ,  C10M149/22

Abstract: An antioxidant polymer (e.g., oligomer) composition comprising repeat units of diphenylamine monomers of formula I wherein R is H, C1-C18 alkyl, C2-C18 alkenyl, C2-C18 alkynyl, —C(O)C1-C18 alkyl, —C(O)aryl and R1, R2, R3 and R4 are each independently H or a linear or branched C1-C18 alkyl, C1-C18 alkoxy, C1-C18 alkylamino, C1-C18 dialkylamino, C1-C18 alkylthio, C2-C18 alkenyl, C2-C18 alkynyl or C7-C21 aralkyl and wherein the number average molecular weight (Mn) of the polymer is from about 350 g/mol to about 5000 g/mol are highly effective antioxidants in lubricant compositions. The polymer compositions may be prepared by a process comprising subjecting diarylamine monomers to dehydrocondensation conditions.