Polar solvent solution and production method thereof
US10975206B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2016 |
| Grant date | Apr 13, 2021 |
| Priority date | — |
| Expiry date | Apr 4, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2203/16
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
A polar solvent solution of the present invention is a polar solvent solution in which a solute containing a polyamine acid is dissolved in a polar solvent. An inorganic salt is added to the solution, and a mole ratio of moisture to the inorganic salt in the solution is 2.5×m×n or less, where m represents the number of cations forming the inorganic salt and n represents a charge number of the cation. A production method of the present invention is a method for producing the above solution, including: changing at, least one of a moisture content and a content of the inorganic salt in the solution to adjust a viscosity of the solution. Thus, the present invention provides a polar solvent solution whose viscosity can be easily adjusted to a desired value and thus enables stable spinning and casting when used as dopes for spinning, film, etc., and methods for producing the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.