Deutsche Texaco Aktiengesellschaft

Texaco Technologie Europa Gmbh

Rwe-dea Aktiengesellschaft Fur Mineraloel Und Chemie and Texaco

Hans Dieter Grasshoff

Vladislav Synek

Harald Kohnz

Herbert Maak

Lubricants for refrigeration equipment operating with fluorocarbons as refrigerants are produced by esterification of at least one neopolyol type polyhydric alcohol with an acid component comprising 60 to 80 mol percent n-pentanoic acid, from about 40 to about 10 mol percent of at least one straight chain C.sub.6 to C.sub.10 monocarboxylic acid and from about 0 to about 30 mol percent C.sub.6 to C.sub.10 branched chain monocarboxylic acid. The resulting esters are suitable for use without lubricating oil additives.

Synthetic ester lubricants for refrigerator systems

A lubricant for refrigerators which contains phosphate, phosphite and/or silicone additives which impart stability and thermal stability to the lubricant.

Lubricant composition for refrigerator systems

Lubricating greases suitable for use at high operating temperatures which contain a complex thickening system consisting of a lithium soap of a hydroxy fatty acid, an alkali salt of boric acid and a dilithium salt of a branched alkyl chain dicarboxylic acid.

Lubricating greases for high operating temperatures

The present invention is a water soluble, pasty lubricant containing a base material comprising a neutral fat and/or a vegetable oil, an alkali metal soap, water and an alkali metal salt of a boric acid. The lubricant has particular advantage for use in non-chip metal forming.

Lubricant for use in non-chip metal forming

A biodegradable lubricating grease composition is provided comprising an emulsion of vegetable-derived gel, water and a lubricant from the class of natural oils and fats.

Biodegradable grease composition

A grease which has improved stability at high temperature is provided by incorporating in an otherwise conventional grease a lithium soap of a hydroxy-stearic acid and an alkali borate. The grease is made by adding lithium tetraborate directly to a mixture comprising a lithium soap of a hydroxy-fatty acid and lubricating oil wherein the resulting mixture has from about 5 to 20 percent by weight of the lithium soap and from about 0.1 to 3 percent by weight of lithium tetraborate.

Growing community of inventors

Hamburg, Germany

Hans Dieter Grasshoff