Copolymers of (meth) acrylic acid esters as flow improvers in oils

US5039432A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Wolfgang Ritter · Düsseldorf, DE
• Claudia Meyer · Goldkronach, DE
• Wolfgang Zoellner · Goldkronach, DE
• Claus-Peter Herold · Mettmann, DE
• Stephan V. Tapavicza · Erkrath, DE

Key dates

• Filing date: Mar 7, 1989
• Grant date: Aug 13, 1991
• Expiry date: Mar 7, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/0391
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Method of reducing the pour-point and improving the flowability of petroleum oil or a fraction thereof by adding thereto a flowability-improving quantity of at least one copolymer of (a) an acrylic acid ester, a methacrylic acid ester, or a mixture of an acrylic acid ester and a methacrylic acid ester, and (b) not more than 20% by weight, based on the weight of the copolymer, of acrylic acid, methacrylic acid, or a mixture of acrylic acid and methacrylic acid, and wherein said esters in component (a) are esters of a C.sub.16 or higher alcohol or an alcohol mixture wherein at least 75% by weight thereof is one or more alcohols containing at least 16 carbon atoms; and the compositions resulting therefrom.