ASHLESS DISPERSANT POLYMETHACRYLATE POLYMERS

摘要

A novel polymer useful as an ashless dispersant additive which provides a combination of dispersancy, good cold cranking engine startup, low-temperatu re viscosity properties and neutral behavior towards fluoropolymer engine seal materials is produced by polymerizing several alkyl methacrylates with a hydroxyalkyl methacrylate while controlling the relative weight ratio of the component monomers to obtain an appropriate carbon atom content in the alkyl side chai n portion of the methacrylate backbone polymer to achieve desired additive solubility properties.