Process for producing partially hydrolyzed polyacrylamide in the

Details Process for producing partially hydrolyzed polyacrylamide in the Process for producing partially hydrolyzed polyacrylamide in the

1974-05-13

1976-07-06

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

162168NA, 210 10, 210 54, 260 296H, 526 89, 526195, 526304, C08F12052, C08F12070, C02C 102, B10D 500

Patent

active

039680932

ABSTRACT:
A process for producing a partially hydrolyzed polyacrylamide which has a high molecular weight and high water solubility and can be suitably used as a flocculant for water treatment and a size for paper manufacture comprising polymerizing an aqueous solution of an acrylamide monomer in the presence of an alkali metal hydroxide such as sodium hydroxide and boric acid, whereby a partial hydrolysis of the polymer formed is also conducted substantially simultaneously with the polymerization. In an additional embodiment, a maturing of the polyacrylamide produced can be conducted by continuing to heat the polymer solution to increase the hydrolysis percentage.

REFERENCES:
patent: 2820777 (1958-01-01), Suen et al.
patent: 3200098 (1965-08-01), Goren
patent: 3414552 (1968-12-01), Scanley
Nobuyuki Nakajima, "Fractionation of Linear Polyethylene With Gel Permeation Chromatography Polymer Molecular Wt. Methods," Table I, pp. 98-107.

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