Evonik Oil Additives Gmbh

Evonik Operations Gmbh

Rhishikesh Gokhale

Frank-Olaf Maehling

Klaus Schimossek

Sandra Muehling

Brian J Hess

Frank-Olaf Mähling

Miriam Kathrin Stihulka

Justin August Langston

Sandra Gebhardt

Barbara Voltz

Michael G Duckworth

Frank-Olaf Mahling

Sandra MÜHLING

A method for the preparation of a copolymer containing at least one alkyl methacrylate and maleic anhydride having a number average molecular weight of 4000 to 18000 g/mol proceeds by solution polymerization in the presence of a radical initiator.

Method for the preparation of copolymers of alkyl methacrylates and maleic anhydride

The present invention relates to a method for the preparation of a sulfur-free copolymer comprising at least one alkyl methacrylate and maleic anhydride having a number average molecular weight of 3000 to 9000 g/mol by solution polymerization in the presence of a radical initiator.

A method for the preparation of a sulfur-free copolymer proceeds by solution polymerization in the presence of a radical initiator, wherein the copolymer contains at least one alkyl methacrylate and maleic anhydride having a number average molecular weight of 3000 to 9000 g/mol.

The present invention relates to a process for preparing grafted polyalkyl(meth)acrylates (PAMAs) containing dispersant repeating units in the polymer backbone as well as in the grafted layer, which polymers are characterized by a low sulfur content, the products available by this process and their use as an additive to fuels, especially to middle distillates and blends thereof. The present invention further relates to a composition comprising the grafted polyalkyl(meth)acrylates prepared by the process according to the present invention and the use of said composition as an additive component to fuels, especially to middle distillates and blends thereof, and for improving the cold flow properties of fuel oil and fuel oil compositions, especially to middle distillate fuels and blends thereof.

Process for preparing low sulfur dispersant polymers

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Darmstadt, Germany

Rhishikesh Gokhale