C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
44/10, 31/16, 31
C08F 246/00 (2006.01) C08F 2/32 (2006.01) C08F 216/14 (2006.01) C08F 220/28 (2006.01) C08J 3/03 (2006.01) C08J 3/09 (2006.01) C09K 8/24 (2006.01)
Patent
CA 1309546
ABSTRACT DISPERSING AGENTS A dispersing agent for particles in aqueous media comprises a copolymer formed from ethyleneically unsaturated monomers including a water-soluble monomer and a monomer carrying a pendant group AmBnApR in which B is ethyleneoxy and n is at least 2, m and p are each generally 0 and R is a hydrophobic group, generally a C12-18 alkyl group or alkaryl group. The polymers generally have molecular weights in the range 500-100000. The dispersants are particularly useful for suspending hydrophobic particles in aqueous media, for example to produce coal slurries, or to suspend hydrophilic particles in aqueous media having high electrolyte concentrations for example for producing paints and, particularly, drilling muds formed in sea water.
515531
Farrar David
Hawe Malcolm
Allied Colloids Limited
Borden Ladner Gervais Llp
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