公开(公告)号：US12173248B2

公开(公告)日：2024-12-24

申请号：US18287748

申请日：2022-04-19

Applicant: LANXESS Corporation

Inventor： Huiyuan Chen ,  Cyril Migdal ,  Kevin DiNicola ,  Robert G. Rowland

IPC: C10M133/12 ,  C10N30/10

Abstract: Liquid alkylated N-phenyl-α-naphthylamine (PANA) compositions are disclosed containing a high concentration of mono-alkylated PANA and low levels of di-alkylated and less than 1% by weight of unsubstituted PANA. The novel compositions may be prepared by controlled alkylation of PANA with propylene oligomers followed by subsequent alkylation with at least one second olefin.

公开(公告)号：US11518732B2

公开(公告)日：2022-12-06

申请号：US16691835

申请日：2019-11-22

Applicant: LANXESS Corporation

Inventor： Robert G. Rowland

IPC: C07C211/55 ,  C07C209/68 ,  C07C211/58 ,  C10M133/12 ,  C09K15/18 ,  C08K5/18 ,  C10N30/10

Abstract: Diaryl amines are selectively alkylated by reaction with branched olefins, which olefins are capable of forming tertiary carbonium ions and can be conveniently prepared from readily available branched alcohols. The diaryl amine products are effective antioxidants and often comprise a high amount of di-alkylated diaryl amines and a low amount of tri- and tetra-alkylated diaryl amines.

公开(公告)号：US20240209276A1

公开(公告)日：2024-06-27

申请号：US18287748

申请日：2022-04-19

Applicant: LANXESS Corporation

Inventor： Huiyuan Chen ,  Cyril Migdal ,  Kevin DiNicola ,  Robert G. Rowland

IPC: C10M133/12 ,  C10N30/10

CPC classification number: C10M133/12 ,  C10M2215/065 ,  C10N2030/10

Abstract: Liquid alkylated N-phenyl-a-naphthylamine (PANA) compositions are disclosed containing a high concentration of mono-alkylated PANA and low levels of di-alkylated and less than 1% by weight of unsubstituted PANA. The novel compositions may be prepared by controlled alkylation of PANA with propylene oligomers followed by subsequent alkylation with at least one second olefin.