Use of an amphoteric water-in-oil self-inverting polymer emulsio

Details Use of an amphoteric water-in-oil self-inverting polymer emulsio Use of an amphoteric water-in-oil self-inverting polymer emulsio

1983-04-06

1984-02-14

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210733, 210734, C02F 156

Patent

active

044315481

ABSTRACT:
An amphoteric water-in-oil self-inverting polymer emulsion is prepared which contains a copolymer of (1) a nonionic vinyl monomer and (2) an amphoteric vinyl monomer or a terpolymer of (1) a nonionic vinyl monomer, (2) an anionic vinyl monomer and (3) a cationic vinyl monomer in the aqueous phase, a hydrocarbon oil for the oil phase, a water-in-oil emulsifying agent and an inverting surfactant. An example of a copolymer is a copolymer of (1) a nonionic vinyl monomer such as acrylamide or methacrylamide and (2) an amphoteric vinyl monomer such as a reaction product of dimethylaminoethyl methacrylate and monochloroacetic acid. An example of a terpolymer is a terpolymer of (1) a nonionic vinyl monomer such as acrylamide or methacrylamide, (2) an anionic vinyl monomer such as sodium acrylate and (3) a cationic vinyl monomer such as a triethyl ammonium ethyl methacrylate methosulfate salt. The emulsion is useful in papermaking, treatment of sewage and industrial wastes, drilling muds and secondary and tertiary recovery of petroleum by water flooding.

REFERENCES:
patent: 3284393 (1966-11-01), Vanderhoff et al.
patent: 3624019 (1971-11-01), Anderson
patent: 4022731 (1977-05-01), Schmitt
patent: 4022736 (1977-05-01), Schmitt
patent: 4077930 (1978-03-01), Lim et al.
patent: 4147681 (1979-04-01), Lim et al.

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