| 摘要 |
<p>Continuous process for preparing a spinning solution of acrylic polymeric material. Process utilizes acrylic polymers obtained in a bulk polymerization slurry, and comprises adding a solvent such as dimethylacetamide to the slurry in such quantity as to be insufficient to attack and dissolve the polymer, bringing the resulting mixture to a temperature not exceeding 170 DEG C, such temperature being such as to not result in any appreciable attack of the polymer by the solvent, removing unreacted monomer by vacuum adiabatic evaporation, and then heating to a temperature not exceeding 170 DEG C, such temperature being sufficiently high to result in solvent attack and dissolution of the polymer.</p> |
