Adding salicylic acid, diameter browning control method of the collodion membrane which is controlled

摘要

Topic Adding salicylic acid at the time of collodion membrane formation, diameter making the membrane and this method apply of being controlled, the functional high-molecular membrane which shuts in the cobalt chloride which is low-molecular it has functionality inside the collodion membrane browns with the lighting of the ultraviolet ray, is a problem with respect to quality as a product. Solutions While by the fact that p hydroxy benzoic acid is added at the time of collodion membrane formation, maintaining the function of control of diameter reduction you can control browning. In addition, applying this method, browning can be controlled also the functional high-molecular membrane which shuts in cobalt chloride inside the collodion membrane, can keep the function of change of color of cobalt chloride. Furthermore, it is possible to assure also the increase of tensile strength of the membrane and the quality improvement of the extension, with the effect of the p hydroxy benzoic acid which is added. Selective figure Figure 21