Polymeric viscosifier for water-immiscible liquids

Details Polymeric viscosifier for water-immiscible liquids Polymeric viscosifier for water-immiscible liquids

C - Chemistry, Metallurgy

09

K

31/21, 31/23, 40

C09K 8/36 (2006.01) C08L 33/06 (2006.01) C09K 3/00 (2006.01) C09K 8/32 (2006.01)

Patent

CA 1275525

ABSTRACT Polymeric Viscosifier for Water-Immiscible Liquids Water-immiscible liquids, for example oil-based drilling fluids, are thickened by the addition of an aqueous dispersion of polymeric particles that are water-insoluble, and insoluble but swellable polymer, in the water immiscible liquid. The particles have a unswollen average diameter of less than 10 um and at least 30% by weight are preferably in the range 0.5 to 5 µm. Preferred polymers are formed from more than 80% by weight hydrophobic monomers, preferably alkyl (meth) acrylates, and up to 20% hydrophilic monomers, preferably unsaturated carboxylic acids, preferably acrylic acid.

481516

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