Loose Core Star Polymers And Lubricating Composition Thereof

摘要

The present invention relates to star polymer having a core made up of a crosslinked network of polymers derived from a mixture of one or more multi-functional monomers and one or more mono-functional monomers and where the star polymer has arms made of polymers derived from a mixture of one or more mono-functional monomers, where the star contains at least three arms bonded to the core. The invention further relates to lubricating compositions containing an oil of lubricating viscosity and the described star polymers as well as methods of lubricating a mechanical device with the described lubricating compositions.

主权项

1. A star polymer wherein said star polymer comprises a core bonded to at least three arms;
wherein the core of the star polymer comprises a crosslinked network of polymers derived from a mixture of monomers comprising: (a) one or more multi-functional monomers; and (b) one or more mono-functional monomers; and wherein the arms of the star polymer are derived from a polymer mixture comprising polymer arm precursors made from (i) one or more mono-functional monomers, wherein said precursors include at least one reactive end group.