| 摘要 |
Hydrophilic polyolefin fibres are mfd. by mixing a fibrous polyolefin compsn. obtd. by projection by discharge, and contg. a carboxylic function, with an aq. dil. mixt. of water sol. anionic and cationic polymers contg. N. - The cationic polymer is the reaction prod. of epichlorohydrin and (a) an amino-polyamide derived from a dicarboxylic acid and a polyalkylene-polyamide contg. two primary amino gps. and >=1 sec. or tert. amino gp. or (b) a polyalkylene-polyamine of formula H2N(CnH2nNH)xH (I) (where n is a whole no. 2-8; x is a whole no. >=2, or (c) a poly(dialkylamine) or (d) a poly-amino-urylene derived from urea and a polyamine contg. >=3 amino gps. >=1 of which is tert. - The anionic polymer is the reaction prod. of glyoxal and (a) a polyacrylamide contg. 2-15% acrylic acid units, or (b) a branched, partially hydrolysed poly(beta-alanine) contg. 1-10 mol. % carboxyl gps. w.r.t. recurring amide units. The wt. ratio between the cationic polymer and the anionic polymer is 1:3-7. - The fibres are readily dispersible in water and can be admixed with wood pulp fibres to form a pulp which can be conferted into high quality paper with increased tensile strength as compared with a paper prepared without the polymer component. |
