申请人:The Lubrizol Corporation
公开号:EP0786511A2
公开(公告)日:1997-07-30
This invention relates to a lubricating composition comprising at least about 30% by weight at least one mineral oil, having a kinematic viscosity of less than about 8 cSt at 100°C, (A) from about 15% to about 40% by weight of at least one polymer, and (B) up to about 30% by weight of at least one fluidizing agent, provided that when the fluidizing agent is a polyα-olefin having a kinematic viscosity from about 2 to about 30 cSt at 100°C, then the polyα-olefin is present in an amount up to about 12% by weight, wherein the lubricating composition has a shear loss of less than about 15% in the 20 hour taper bearing shear test. The invention also relates to concentrates used in preparing lubricating compositions. The present combination of components provides good low and high temperature properties especially when used in combination with one or more mineral oils. In one aspect, the compositions provide improved oxidation resistance.
本发明涉及一种润滑组合物,它包含至少 30%(重量)的至少一种矿物油(在 100°C 时运动粘度小于约 8 厘斯 特)、(A) 至少一种聚合物(重量)约 15%至约 40%,以及(B) 至少一种流化剂(重量)最多约 30%、条件是当流化剂为聚α-烯烃时,其运动粘度在 100°C 时为约 2 至约 30 cSt,则聚α-烯烃的含量最多为约 12%(重量比),其中润滑组合物在 20 小时锥形轴承剪切试验中的剪切损失小于约 15%。本发明还涉及用于制备润滑组合物的浓缩物。本发明的组分组合具有良好的低温和高温性能,尤其是与一种或多种矿物油配合使用时。一方面,这种组合物具有更好的抗氧化性。