发明授权
- 专利标题： Viscosity improver compositions providing improved low temperature characteristics to lubricating oil
- 专利标题（中）： 粘度改进剂组合物为润滑油提供改进的低温特性
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申请号： US11085022申请日： 2005-03-16
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公开(公告)号： US07776804B2公开(公告)日： 2010-08-17
- 发明人: Chor Huang , Lewis Breon
- 申请人： Chor Huang , Lewis Breon
- 申请人地址： US OH Wickliffe
- 专利权人： The Lubrizol Corporation
- 当前专利权人： The Lubrizol Corporation
- 当前专利权人地址： US OH Wickliffe
- 代理商 David M. Shold; Christopher D. Hilker
- 主分类号： C10M143/10
- IPC分类号： C10M143/10 ; C10M143/12 ; C10M143/04
摘要：
A lubricant composition comprising an oil of lubricating viscosity; (A) 0.05 to 1.5 percent by weight of a copolymer comprising 70 to 79 percent by weight of units derived from ethylene (“E”), having a Mw of 50,000 to 100,000, Mw/ Mn less than 3, density (“D”) of 860 to 896 kg/m3, and a melting point (“Tm”) of 15° C. to 60° C., wherein E and Tm fulfill the expression 3.44E−206≧Tm; and (B) 0.05 to 1.5 percent by weight of a block- copolymer comprising a first block which comprises a vinyl aromatic comonomer and a second block which comprises a diene comonomer, the diene monomer-containing block being hydrogenated; wherein the weight ratio (A):(B) is 20:80 to 60:40; exhibits good low temperature performance and durability.
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