申请人:SAITA Osamu
公开号:US20080318819A1
公开(公告)日:2008-12-25
A grease composition which is suitable for a ball bearing exposed to high temperatures and exhibits stable lubricity for a prolonged period of time, and a bearing which encapsulates the grease composition are provided.
A grease composition comprising (a) a base oil, (b) a thickener, (c) a compound having alkylthiocarbamoyl group of the general formula (1), and an amine-ketone condensate-based antioxidant. A grease composition further comprising (e) a metal inactivator.
(wherein R
1
, R
2
, R
3
, R
4
are independently C
1
-C
20
alkyl, and X is S, S—S, S—CH
2
—S, S—CH
2
CH
2
—S, or S—CH
2
CH
2
CH
2
—S)
提供了一种适用于高温下暴露的滚珠轴承,并表现出长时间稳定润滑性的润滑脂组合物,以及封装润滑脂组合物的轴承。润滑脂组合物包括(a)基础油,(b)增稠剂,(c)具有通式(1)的烷基硫代氨基羰基化合物,以及胺酮缩合物类抗氧化剂。润滑脂组合物还包括(e)金属失活剂。(其中R1、R2、R3、R4分别独立地为C1-C20烷基,X为S、S—S、S—CH2—S、S—CH2CH2—S或S—CH2CH2CH2—S)