To provide a polymer having at least one property of reduced polydispersity, low temperature viscometrics, high temperature viscometrics and shear stability and capable of imparting dispersant and/or viscosity modifying properties; and to provide a method for preparing these compositions.
The present invention provides a method for preparing a polymer, including the steps of: (1) contacting a free radical initiator, a chain transfer agent containing a thiocarbonyl thio group and a free radical leaving group, and a radically polymerisable monomer, to form a polymer chain; and (2) contacting the polymer chain of step (1) with at least one of a polyvalent coupling agent, a polymerization inhibitor, a grafting acylating agent, an amine and an oil of lubricating viscosity. The invention further provides compositions and uses for the polymer.
| WO/2011/102037 | LUBRICANT COMPOSITION FOR CONTINUOUSLY VARIABLE TRANSMISSION |
| WO/2002/090602 | OIL COMPOSITION FOR HEAT TREATMENT |
| JP2001294881 | FLUID FOR TRACTION DRIVE |
SCHOBER BART
DAVIES MARK
VISGER DANIEL
| JP2006522176A | 2006-09-28 | |||
| JPH11286520A | 1999-10-19 |
| WO2005056739A1 | 2005-06-23 |
Takaaki Yasumura
Natsuki Morishita
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