STAR COPOLYMER AND USE THEREOF AS A VISCOSITY IMPROVER
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United States of America Patent
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Issued Date -
Mar 8, 2018
app pub date -
Mar 29, 2016
filing date -
Mar 30, 2015
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Abstract
Disclosed is a star copolymer (C) including at least 10 wt. % of units derived from styrene monomer and including arms that include a statistical copolymer (EP) including ethylene units and propylene units, and the method for preparing same. Also disclosed is the use thereof in lubricating compositions, in particular for improving the viscosity index, to the lubricating compositions thus obtained and to the uses thereof.
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