Polymeric fluidizer for middle distillates

US4932980A · kind A · utility

Assignee

• Rohm Co., Ltd. · JP

Inventors

• Michael Mueller · Bensheim, DE
• Horst Pennewiss · Darmstadt, DE

Key dates

• Filing date: Jul 25, 1988
• Grant date: Jun 12, 1990
• Expiry date: Jul 25, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F255/026
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An agent for improving the flow properties of middle distillates, said agent being a solution consisting essentially of a solvent having a boiling point of at least 50.degree. C. at 760 mm Hg and a graft copolymer formed from PA1 (a) as the grafting monomer, 20 to 80 percent by weight of an ester of methacrylic acid and a C.sub.8 to C.sub.15 alkanol, and PA1 (b) as the backbone polymer, from 80 to 20 percent by weight of an ethylene/vinyl acetate copolymer or of a terpolymer formed from ethylene, vinyl acetate, and a substituted olefin having form 3 to 50 carbon atoms, said backbone polymer having a reduced viscosity of 6 to 50 ml/g and degree of branching between 3 and 15 CH.sub.3 groups per 100 CH.sub.2 groups.