Use of polymethylalkanes as biodegradable base oils in lubricants and functional fluids

US5366658A · kind A · utility

Assignee

• Huls Aktiengesellschaft · DE

Inventors

• Dirk Hoppe · Nottuln, DE
• Horst Pennewiss · Darmstadt, DE
• Frank Kraushaar · Essen, DE
• Michael Stehr · Witten, DE
• Roland Streck · Marl, DE
• Jaroslaw Monkiewicz · Rheinfelden (Baden), DE
• Hans Guenther Wey · Wiesloch, DE

Key dates

• Filing date: Jan 10, 1994
• Grant date: Nov 22, 1994
• Expiry date: Jan 10, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2020/01
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to the use of polymethylalkanes having terminal methyl groups and methylene and ethylidene groups of the formula I ##STR1## in which the total number of C atoms n+2 m+2 is 20 to 100 and the ratio of the methyl and methylene groups to the ethylidene groups is 3 to 20:1 and the ethylidene groups are always separated by at least one methylene group, as biodegradable base oils for lubricants and functional fluids. Suitable polymethylalkanes are obtained by oligomerization of .alpha.,.omega.-diolefins, for example in particular according to P 41 19 332.6, or by pyrolysis of ethene/propane copolymers and subsequent hydrogenation in each case. The polymethylalkanes can be combined with conventional additives and other degradable or non-degradable base oils.