Polyamphoteric polysaccharide graft copolymers neutrally charged

Details Polyamphoteric polysaccharide graft copolymers neutrally charged Polyamphoteric polysaccharide graft copolymers neutrally charged

1989-12-15

1992-07-21

Maples, John S.

Earth boring, well treating, and oil field chemistry

Earth boring

Contains organic component

527300, 527312, C08G 8300

Patent

active

051322846

ABSTRACT:
A method of thickening, stabilizing, controlling mobility, or enhancing water retention in aqueous media and electrolyte-containing aqueous media employs neutrally-charged polyamphoteric graft copolymers of polysaccharides with zwitterionic monomers or cationic/anionic monomer pairs. These polyampholytes are characterized by their unique resistance to loss of intrinsic viscosity in the presence of electrolytes. These polyampholytes may be prepared by an inverse emulsion method of graft copolymerization. One such electrolyte-tolerant polyampholyte is a novel composition prepared by graft copolymerization of guar gum.

REFERENCES:
patent: Re28576 (1975-10-01), Anderson et al.
patent: 4131576 (1978-12-01), Iovine et al.
patent: 4222881 (1980-09-01), Byham et al.
patent: 4540510 (1985-09-01), Karl
patent: 4563497 (1986-01-01), Masanek et al.
patent: 4637882 (1987-01-01), Peiffer et al.
patent: 4652623 (1987-03-01), Chen et al.
patent: 4673716 (1987-06-01), Siano et al.
patent: 4676317 (1987-06-01), Fry et al.
patent: 4690996 (1987-09-01), Shih et al.
patent: 4710555 (1987-12-01), Peiffer et al.
patent: 4866151 (1989-09-01), Tsai et al.
patent: 4973641 (1990-11-01), Tsai et al.
Salamone, J. C., et al., "Aqueous Salt Absorption by Ampholytic Polysaccharides", Polymer, 26:1234 (1985), (Earlier publication: Technical Rep. to Office of Naval Research Chemistry under Contract No. N00014-83K-0674 Feb. 27, 1985).
Lin, Kao-Ching, Hydrophilic, Ampholytic Graft Copolymers, M. S. Thesis, University of Lowell, Sep., 1983, pp. 8 (line 5); 29-30; 34-41;47-51; 71-3.
Salamone, J. C., et al., "Synthesis and Aqueous Solution Viscosity Behavior of Polyampholytes from Cationic-Anionic Monomer Pairs", ACS Sym. Ser., 187:337(1980).
Salamone, J. C., et al., "Preparation of Inner Salt Polymers from Vinylimidazolium Sulfobetaines", Polymer, 18:1058(1977).
Salamone, J. C., et al., "Aqueous Solution Properties of a Poly (vinyl imidazolium sulphobetaine)", Polymer 19:1157 (1978).

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