GPAM compositions and methods
AssigneeKemira Oyj
InventorsChen Lu, Christopher Michael Lewis, William James Garrisi
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Abstract
The present disclosure generally relates to glyoxalated polyacrylamide (GPAM) compositions, methods of preparation and methods of use thereof, particularly in the paper industry. Moreover, the present disclosure generally pertains to cationic GPAM compositions, methods of preparation and methods of use thereof in papermaking applications and in products such as paper-based products, wherein the cationic GPAM compositions may provide increased wet and/or dry strength to the paper-based products, and wherein such cationic GPAM compositions optionally require a reduced volume of an aqueous carrier for storage or transport compared to a volume of an aqueous carrier needed for conventional GPAMs used in papermaking.
Claims17
A cationic glyoxalated polyacrylamide (“GPAM”) composition suitable for use as a dry and/or wet strengthening agent, wherein said cationic GPAM composition comprises:
- i. a first base polymer having a weight average molecular weight in the range of 2 to 30 kDa;
- and
- ii. a second base polymer having a weight average molecular weight in the range of 50 to 1500 kDa;
- wherein the weight ratio of the first base polymer to the second base polymer ranges from about 10:90 to about 90:10;
- wherein the first base polymer is glyoxalated and the second base polymer is glyoxalated, wherein the first base polymer and the second base polymer do not comprise a primary amine functional group.
Dependencies are inferred from the claim text.