| 摘要 |
PURPOSE:To enhance the dispersion stability and storage stability of the title dispersion by preparing the aq. dispersion from a water-soluble copolymer consisting of a specified cationic surfactant, a cationic monomer and an aromatic vinyl monomer; and a water-insoluble substance. CONSTITUTION:From 1-15mol% cationic surfactant having a 4-28C hydrocarbonic group and a polymerizable functional group, 50-90mol% copolymerizable cationic monomer, and 1-49mol% copolymerizable aromatic vinyl monomer are allowed to react with each other to obtain a water-soluble copolymer. The water-soluble copolymer and a water-insoluble substance are mixed to prepare an aq. dispersion. An ketene dimer is appropriately used as the water-insoluble substance, and the particle diameter is appropriately controlled to <=5mu. The obtained aq. dispersion has excellent dispersion stability, the sizing performance at the start is also ameliorated, and excellent sizing performance can be obtained. |
