AQUEOUS SILK FIBROIN SOLUTION WITH EXCELLENT STORAGE STABILITY AND PREPARATION THEREOF

摘要

PURPOSE:To obtain the title solution suppressing occurrence of turbidity or gel-like substance in a liquid for a long time and useful as a film forming material, etc., by dissolving a water-soluble amide compd. and/or dimethyl sulfoxide in an aq. silk fibroin soln. CONSTITUTION:0.5-50wt.% water-soluble amide compd. (e.g. N,N- dimethylformamide) and/or dimethyl sulfoxide in terms of soln. concn. are dissolved in an aq. silk fibroin soln. prepd. by dissolving it in pref. an aq. medium and, if necessary, 0.01-1.0wt.% mildewproofing agent and preservative (e.g. methyl p-hydrooxibenzoate) and 0.01-1.0wt.% chelating agent (e.g. disodium salt of EDTA) are incorporated.