Bayer Aktiengesellschaft

Siegfried Kussi

Karl-Heinz Hentschel

Christian Rasp

Rolf Dhein

Hans-Josef Buysch

Heinrich Alberts

Pramod Gupta

Hermann Perrey

Ottfried Schlak

Gunther Boehmke

Wolfgang Grape

Udo-Winfried Hendricks

Bernhard Lehmann

Ralf Timmermann

Dittmar Nerger

Hans Winter

Herbert Vojacek

Hansjurgen Botsch

The invention relates to a new three-part process, which can also be employed on a large industrial scale, for the preparation of polyurea lubricating greases, which is characterised

Process for the preparation of polyurea greases

Monofunctional polyethers having hydroxyl groups contain as built-in terminal groups or monomers

Polyethers, process for their preparation and lubricants containing

The invention relates to the use of combinations of water-soluble polymeric polyether polyols, in which at least 50% of the terminal hydroxyl groups are blocked by reaction with a monoisocyanate incorporating a long-chain aliphatic hydrocarbon radical, and certain surfactants as thickener systems for high water based functional fluids and to the thickened high water based functional fluids.

Thickening systems for high water based functional fluids and the high

The new sulphur-containing polyether-urethanes are prepared by a polyaddition reaction of aromatic, cycloaliphatic and/or aliphatic polyisocyanates with

Preparation and use of sulphur-containing polyether-urethanes

Organopolysiloxanes of the formula ##STR1## in which R is an alkyl radical having 6 to 18 C atoms,

Lubricating oil preparations

Stabilized lubricants based on polyethers containing diphenylamine derivatives of the formula ##STR1## in which R.sup.1 denotes hydrogen, a straight-chain or branched C.sub.4 to C.sub.12 -alkyl group, a straight-chain or branched C.sub.4 to C.sub.12 -alkylene group, a C.sub.7 to C.sub.12 -aralkyl group, a C.sub.7 to C.sub.12 -aralkylene group, a C.sub.5 to C.sub.12 -cycloalkyl group which is optionally substituted by C.sub.1 to C.sub.6 -alkyl, -alkenyl, -cycloalkyl or -cycloalkenyl, or a C.sub.5 to C.sub.12 -cycloalkenyl group which is optinally substituted by C.sub.1 to C.sub.6 -alkyl, -alkenyl or -cycloalkenyl, but does not denote a hydrocarbon group derived from a terpene, in the ortho- or para-position relative to the particular N atom, n represents an integer from 1 to 29 and Y represents a bifunctional radical --A-- and optionally additionally a bifunctional radical --B--, in each case in the ortho- or para-position relative to the N atoms, wherein --A-- denotes a straight-chain or branched C.sub.4 to C.sub.12 -alkylene radical, a C.sub.7 to C.sub.12 -aralkylene radical, or a C.sub.5 to C.sub.12 -cycloalkylene radical which is optionally substituted by C.sub.1 to C.sub.6 -alkyl or -cycloalkyl, but does not denote a hydrocarbon radical derived from a terpene, and --B-- denotes --S-- or ##STR2## wherein R.sup.2 represents hydrogen, C.sub.1 to C.sub.6 -alkyl or C.sub.5 to C.sub.6 -cycloalkyl, and wherein --B-- makes up an amount of 0 to 50 mol % of Y, and if appropriate other additives.

Stabilized lubricants based on polyethers

A composition comprising 96-99.9% by weight of a highly flame-resistant base oil such as an aromatic phosphate ester or a polychlorinated aromatic compound and a polyester of molecular weight, 20,000 to 300,000, derived from polytetramethylene glycol, for instance. The composition has an improved viscosity index and is especially useful as a HSD lubricant. It is also useful as a hydraulic fluid and/or heat transfer liquid. By addition of such a polyester to such base oil, the viscosity index of the base oil is considerably improved.

Process for the preparation of liquids of low inflammability and high

The new polyethers obtainable by polymerization of an 1,2-epoxyalkane with 8 to 26 carbon atoms, and a tetrahydrofuran in the presence of a hydroxyl compound of the formula

Growing community of inventors

Leverkusen, Germany

Siegfried Kussi