发明名称 |
Viscosity index modifiers and lubricant compositions containing such viscosity index modifiers |
摘要 |
The invention relates to viscosity modifier polymers, concentrate and lubricant formulations utilizing a diblock polymer having one block A and one block B, block A contributing from 15 to 30% of the total chain length and block B from 70 to 85% of the total chain length, wherein block A comprises at least 93 wt % of ethylene and at least one other alpha-olefin and block B comprises an ethylene content between 40 and 75 wt % and at least one other alpha-olefin and wherein the resulting block copolymer has an average ethylene content of between about 60 wt % to 80 wt % ethylene, a fast Gaussian NMR relaxation signal between 17 and 22% and a slow exponential NMR relaxation signal between 58 and 68% of the total NMR relaxation signal, a SSI of at least 35% and a TE of at least 3.5 in order to obtain improvements in fuel economy. |
申请公布号 |
US8105992(B2) |
申请公布日期 |
2012.01.31 |
申请号 |
US20070800649 |
申请日期 |
2007.05.07 |
申请人 |
SCHAUDER JEAN-ROCH;NASS KIRK ALAN;RAVISHANKAR PERIAGARAM SRINIVASAN;VINCENT KARINE;EXXONMOBIL CHEMICAL PATENTS INC. |
发明人 |
SCHAUDER JEAN-ROCH;NASS KIRK ALAN;RAVISHANKAR PERIAGARAM SRINIVASAN;VINCENT KARINE |
分类号 |
C10M119/02;C08F255/02;C10M143/00 |
主分类号 |
C10M119/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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