| abstract |
Provided is a polyvinyl acetal resin varnish that has low irritation, toxicity, environmental pollution, odor, flammability and the like that do not cause any problems in practical use, high safety, low viscosity, and good workability, and uses thereof. By using a non-aqueous solvent, preferably a carbonate ester, more preferably a mixed solvent of a cyclic carbonate and a chain carbonate, as an organic solvent for dissolving the polyvinyl acetal resin, the polyvinyl acetal resin can be made uniform regardless of its type. Dissolves and provides a highly safe and low viscosity varnish. Since the varnish has an action of gelling an organic solvent, it can be used as a gelling agent for various applications. |