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US 2005/0023504 A1Published application
Functional fluid and the use thereof
AssigneeRohmax Additives GmbH
InventorsDouglas Placek, Bernhard Kinker, David Cooper, Robert Simko
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AssigneeRohmax Additives GmbH
InventorsDouglas Placek, Bernhard Kinker, David Cooper, Robert Simko
Estimating the term…
The present invention concerns a functional fluid comprising A) 1 to 99% by weight based on the total weight of the functional fluid of alkyl(meth)acrylate polymers obtainable by polymerizing a mixture of olefinically unsaturated monomers, which consists of a) 1-100 wt % based on the total weight of the ethylenically unsaturated monomers of one or more ethylenically unsaturated ester compounds of formula (I) where R is hydrogen or methyl, R1 means a linear or branched alkyl residue with 1-6 carbon atoms, R2 and R3 independently represent hydrogen or a group of the formula —COOR′, where R′ means hydrogen or a alkyl group with 1-6 carbon atoms, b) 0-99 wt % based on the total weight of the ethylenically unsaturated monomers of one or more ethylenically unsaturated ester compounds of formula (II) where R is hydrogen or methyl, R4 means a linear or branched alkyl residue with 7-40 carbon atoms, R5 and R6 independently are hydrogen or a group of the formula —COOR″, where R″ means hydrogen or an alkyl group with 7-40 carbon atoms, c) 0-50 wt % based on the total weight of the ethylenically unsaturated monomers comonomers, and B) 1 to 99% by weight based on the total weight of the functional fluid of an oxygen containing compound selected from to group of organophosphorus compounds, carboxylic acid esters and/or polyether polyols.
A functional fluid comprising
The functional fluid according to one of the preceding claims, wherein the oxygen containing compound is a carboxylic ester containing at least two ester groups.
The functional fluid according to one of the preceding claims, wherein the oxygen containing compound is a diester of carboxylic acids containing 4 to 12 carbon atoms.
The functional fluid according to one of the preceding claims, wherein the oxygen containing compound is a ester of a polyol.
The functional fluid according to one of the preceding claims, wherein the oxygen containing compound is a polyalkylene glycol.
The functional fluid according to one of the preceding claims, wherein the alkyl(meth)acrylate polymers have a molecular weight in the range of 300 g/mol to 50 000 g/mol.
The functional fluid according to one of the preceding claims, wherein the alkyl(meth)acrylate polymers are obtainable by a mixture comprising
The functional fluid according to one of the preceding claims, wherein the alkyl(methyacrylate polymers are obtainable by a mixture comprising
The functional fluid according to one of the preceding claims, wherein the alkyl(meth)acrylate polymers are obtainable by a mixture comprising dispersant monomers.
The functional fluid according to one of the preceding claims, wherein the alkyl(meth)acrylate polymers are obtainable by a mixture comprising vinyl monomers containing aromatic groups.
The functional fluid according to one of the preceding claims, wherein the weight ratio of the alkyl(meth)acrylate polymers to the oxygen containing compound is in the range of 2:1 to 1:10.
A hydraulic oil comprising the functional fluid according to one of the preceding claims.
The use of a functional fluid according to one of the preceding claims to improve the fire resistance of hydraulic fluids, transformer oils and quench oils.
Dependencies are inferred from the claim text.