Preparation of water-soluble high polymers

Details Preparation of water-soluble high polymers Preparation of water-soluble high polymers

1975-12-18

1978-02-21

Lilling, Herbert J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 793M, 260875, 260885, 526202, 526209, 526292, 526303, 526305, 526307, 526312, C08F 2800, C08G 7500, C08F 200, C08F 2070

Patent

active

040751830

ABSTRACT:
In the production of a water-soluble, cationic high polymer of (A) at least one of acrylamide and methacrylamide and (B) at least one of ammonium type monomers of either one of the formulas: ##STR1## wherein R.sub.1 is a hydrogen atom or a methyl group, R.sub.2 and R.sub.3 are each a lower alkyl group, R.sub.4 is a hydrogen atom, a lower alkyl group, an aryl group, a hydroxy(lower)alkyl group, a benzyl group or a group of the formula: --CH.sub.2 COO(CH.sub.2).sub.m CH.sub.3 (m being an integer of 0 or 1), R.sub.5.sup.- is a group of either one of the formulas: --(CH.sub.2).sub.2 COO.sup.- and -(CH.sub.2).sub.3 SO.sub.3.sup.-, X is a halogen atom or an acid residue, Y is -O- or --NH-- and n is an integer of 1 to 4, a process which comprises initiating the polymerization of the monomeric component (A) with or without a portion of the monomeric component (B) in an aqueous medium containing an organic solvent selected from the group consisting of acetone, acetonitrile, t-butanol, tetrahydrofuran and dioxane at a concentration of about 15 to 70 % by weight until the polymerization proceeds to a certain extent and then continuing the polymerization while adding the remaining portion of the monomeric component (B) thereto under the occasional supplementation of a water-miscible organic solvent thereto so as to keep an appropriate viscosity of the reaction system to produce the high polymer in a high yield with ease.

REFERENCES:
patent: 3025219 (1962-03-01), Maeder
patent: 3296167 (1967-01-01), Turner et al.
patent: 3509113 (1970-04-01), Monagle et al.
patent: 3661880 (1972-05-01), Markert et al.
patent: 3694393 (1972-09-01), Lewis et al.

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