Dow Global Technolgoies LLC

Jochem Kersbulck

Daniele Vinci

Martin R Greaves

Johan A Thoen

A composition comprising water and a polyalkylene glycol having an allyl content of less than 20 μeq/g, which composition has reduced foaming properties and preferably a biodegradability of at least 60% as determined using OECD 301F. The polyalkylene glycol can be made by forming a first intermediate comprising an oxypropylene block by reacting propylene oxide with a polyol initiator in the presence of a Double Metal Cyanide catalyst, and then reacting the first intermediate with ethylene oxide in the presence of a KOH catalyst.

Low foaming hydraulic fluids having biodegradable polyalkylene glycol rheology modifiers useful in subsea applications

Prepare an ester of a secondary hydroxy fatty acid oligomer by first partially homopolymerizing a hydroxylated fatty acid compound, reacting the partially homopolymerized hydroxylated fatty acid compound with an alcohol to form an intermediate product, and capping the intermediate product with an acid, acid anhydride or ester. The ester of a secondary hydroxy fatty acid oligomer may be represented as follows: (3) where R is an alkyl group that contains from six to twelve carbon atoms, Ris hydrogen or a methyl radical, x is an integer within a range of from 8 to 12, n is an integer between 1 and 20, Ris an alkyl group that contains from one carbon atom to twenty carbon atoms and Ris an alkyl group that contains from one carbon atom to twelve carbon atoms. 

Esters of secondary hydroxy fatty acid oligomers and preparation thereof

A process results in oligomerized ester alkoxylate compositions having substantially no unsaturation, which may be useful as lubricants, heat transfer fluids, plasticizers, thickening agents, surfactants, or power transmission fluids. The steps include, in either order, oligomerization of a hydroxylated fatty acid or fatty ester and quantitative reaction of unreacted carboxylic acid or ester groups with an alcohol, with the product of either reaction then being alkoxylated in the presence of a double metal cyanide catalyst. These oligomerized ester alkoxylates may be derived from vegetable oils to ensure high levels of renewable carbons. The compositions may exhibit desirably high viscosity index, low pour point, and high levels of renewable carbons.

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Terneuzen, Netherlands

Jochem Kersbulck