Well defined low molecular weight dispersant polymethacrylates
AssigneesThe Lubrizol Corporation, University of Warwick
InventorsPaul O'Hora, Dixit Parmar, Timothy R. Smith, David M. Haddleton, Georgios Patias
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Abstract
The present invention provides, among other things, a process to produce a low molecular weight dispersant polymethacrylate polymer (“LMWDPMA”), and the LMWDPMA itself, along with the use of the LMWDPMA in a lubricating composition, as well as a method for lubricating an internal combustion engine as disclosed herein.
Claims7
A dispersant polymethacrylate polymer (“DPMA”) comprising an amine terminated polymethacrylate polymer represented by Formula II
- where R1 is an alkyl group of 1 to 24 carbon atoms;
- X is a nitrogen-containing group;
- and n is an integer of 3 to 30.
A process for preparing a dispersant polymethacrylate polymer comprising 1) preparing a vinyl terminated polymethacrylate polymer by catalytic chain transfer polymerization;
- 2) reacting the vinyl terminated polymethacrylate polymer with a nitrogen-containing group in the presence of microwave radiation.
Dependencies are inferred from the claim text.