C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
31/21, 400/9071,
C09K 8/512 (2006.01) C08F 220/04 (2006.01) C08F 220/12 (2006.01) C09K 8/588 (2006.01) C09K 8/88 (2006.01)
Patent
CA 1112781
INVENTORS: Daniel F. Klemmensen and Richard G. Bauer INVENTION: AQUEOUS GELS Abstract of the Disclosure There is disclosed an aqueous medium comprising water to which has been added a water thickening amount of a water thickening polymer which is prepared by poly- merizing at least one alkyl acrylate monomer and at least one carboxylic polymerizable monomer selected from the group consisting of acrylic acid and methacrylic acid which are present from 20 to 95 parts by weight per hundred parts of total monomer being polymerized and utilizing, as an ionic emulsifier, an emulsifier selected from the group consisting of disodium or diammonium nonyl- phenoxy polyethoxy sulfosuccinate having the general formula: CH3(CH2)8 C6H4O (CH2CH2O)8-16 COCH2CH(COOM)SO3Q wherein Q is sodium or ammonium and a sodium or ammonium lauryl polyethoxysulfate having the general formula: CH2(CH2)11O(CH2CH2O)8-16SO3Q wherein Q is sodium or ammonium, said polymer in latex form being neutralized to a pH ranging between a pH of 5.5 to 11.5. Such polymers may also be gelled with water soluble polyvalent compounds such as sodium dichromate and water soluble reducing agents such as sodium hydro- sulfite. The aqueous gels are employed in enhanced oil recovery.
308495
Bauer Richard G.
Klemmensen Daniel F.
Smart & Biggar
The Goodyear Tire & Rubber Company
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