GLYOXYLATED POLYACRYLAMIDE POLYMER COMPOSITION, USE THEREOF AND A METHOD OF IMPROVING STRENGTH CHARACTERISTICS OF PAPER, CARDBOARD AND THE LIKE Russian patent published in 2020 - IPC D21H17/44 D21H17/45 D21H17/55 D21H21/18 D21H21/20 D21H23/04 C08L33/26 C08F8/28 

FIELD: pulp industry.

SUBSTANCE: invention relates to a cationic glyoxylated polyacrylamide polymer composition for use in the production of paper and cardboard. Water composition contains a glyoxylated polyacrylamide polymer, characterized by density of cationic charge equal to 0.8–1.8 meq/g of dry polymer, in amount per dry substance 5–15 wt %, aqueous medium and buffer acid. Buffer acid contains formic acid or citric acid or any salt thereof, such as sodium formate or sodium citrate. Aqueous composition is characterized by a pH value of 2.2–4.0.

EFFECT: higher storage stability.

22 cl, 16 tbl, 4 ex