C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/323, 134/55,
C08F 220/56 (2006.01) C08F 212/14 (2006.01) C08F 220/60 (2006.01) C08K 7/02 (2006.01) C09K 8/24 (2006.01)
Patent
CA 1207943
ABSTRACT OF THE DISCLOSURE The present invention relates to improved viscosification agents for a variety of aqueous solu- tions which comprise a family of intramolecular poly- meric complexes (i.e., polyampholytes) which are ter- polymers of acrylamide/metal styrene sulfonate/meth- acrylamidopropyltrimethylammonium chloride (MAPTAC). The metal styrene sulfonate is an anionic monomer, while MAPTAC is cationically charged. These acrylamide-based polyampholytes have 1 to 50 mole % of the anionic monomer and 1 to 50 mole % of the cationic moiety present within the macromolecular structure. These groups are not necessarily present in an equi- molar charge ratio. The excess undissociated charge allows for facile dispensability or solubility of the polyampholytes into fresh water.
448911
Lundberg Robert D.
Peiffer Dennis G.
Turner S. Richard
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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