| 摘要 |
<p>Method for the prodn. of paper where an aq. slurry of paper-producing fibres contg. 0.01-0.3 wt.% solids, based on the fibre content of the furnish, of a water-soluble, essentially linear polymer of formula (I) where R = 1-2C alkyl; R' = H or Me; n = 1-6; the ratio of x:y = 1:3-3:1 and z = the deg. of polymerisation; is wet laid to form paper. z is such that the molecular wt. of the polymer is not greater than 300,000 and the pH of the slurry is less than 5.5. Opt., unclaimed but often pref., 0.1-2% of alum is added to the slurry. - R'=H, R=Me and the ratio of x:y is about 3:1. The pH is 4-5.</p> |
