| 摘要 |
PURPOSE:To obtain a cation-modified polyacrylamide which is stable for a long period of time and is useful as a paper-making additive, by adding a specified cationic compound to a reaction product of an acrylamide polymer with a hypohalite. CONSTITUTION:A diamine (e.g., ethylenediamine) or an amino alcohol (e.g., monoethanolamine) is mixed with a cationic monomer of formula I (wherein R1 is H or methyl, A is formula II or formula III, R3, R4, R5, R6, and R7 are each alkyl or benzyl, X<-> is an anion and m is 1-4), and the mixture is reacted by Michael addition to produce a cationic compound of formula IV (wherein R2 is amino or hydroxyl and n is 2-6). A hypohalite is added to an aqueous solution of polyacrylamide in an alkaline condition and reacted. The title modified product is obtained by adding 1-10mol%, based on the amide groups of the polyacrylamide, cationic compound to the above reaction product. |
