04670501 is referenced by 121 patents and cites 9 patents.

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 .mu.m and at least 30% by weight are preferably in the range 0.5 to 5 .mu.m. 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.

Title
Polymeric compositions and methods of using them
Application Number
6/734776
Publication Number
4670501
Application Date
May 16, 1985
Publication Date
June 2, 1987
Inventor
Malcolm Hawe
West Yorkshire
GB
John Langley
West Yorkshire
GB
Brian Dymond
West Yorkshire
GB
Agent
Ostrolenk Faber Gerb & Soffen
Assignee
Allied Colloids
GB
IPC
C08L 33/08
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