Process for producing lubricating grease

摘要

The present invention relates to a process for producing lubricating grease by adding a polymeric structure improver in a composition liquid at 25° C. to the dispersion to a dispersion which has grease structure and comprises at least one thickener and at least one lubricating oil.

主权项

1. A process for producing a lubricating grease, comprising:
adding a polymeric structure improver to a dispersion which has a grease structure, wherein the dispersion comprises at least one thickener and at least one lubricating oil, and wherein the polymeric structure improver is added in the form of a composition which is a liquid at 25° C., and wherein the polymeric structure improver is obtained by polymerizing a monomer composition comprising: a) 0 to 40% by weight, based on the weight of the monomer compositions for preparing the polymeric structure improvers, of one or more ethylenically unsaturated ester compounds of the formula (I) wherein R is hydrogen or methyl, R1 is a linear or branched alkyl radical having 1 to 5 carbon atoms, R2 and R3 are each independently hydrogen or a group of the formula —COOR′ where R′ is hydrogen or an alkyl group having 1 to 5 carbon atoms, b) 50 to 100% by weight, based on the weight of the monomer compositions for preparing the polymeric structure improver, of one or more ethylenically unsaturated ester compounds of formula (II) wherein R is hydrogen or methyl, R4 is a linear or branched alkyl radical having from 6 to 30 carbon atoms, R5 and R6 are each independently hydrogen or a group of the formula —COOR″, where R″ is hydrogen or an alkyl group having 6 to 30 carbon atoms, and c) 0.01 to 20% by weight, based on the weight of the monomer compositions for preparing the polymeric structure improvers, of acid-bearing monomers or salts thereof comprising at least one monomer selected from the group consisting of methacrylic acid and acrylic acid or salts thereof.