Preparation of amphoteric water-in-oil self-inverting polymer em

Details Preparation of amphoteric water-in-oil self-inverting polymer em Preparation of amphoteric water-in-oil self-inverting polymer em

1981-09-04

1982-12-14

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523337, 524547, 524548, 524551, 524555, 524556, 524559, 524801, C08L 2706, C08L 2902, C08L 3102, C08L 3908

Patent

active

043638864

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: 4022731 (1977-05-01), Schmitt
patent: 4022736 (1977-05-01), Schmitt
patent: 4077930 (1978-03-01), Lim et al.

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