| 摘要 |
PURPOSE:To obtain a water-based compsn. which enables its viscosity to be widely adjusted and has an excellent water retentivity good bactericidal and deodorizing activities and excellent bonding strength, by mixing a compsn. contg. L-ascorbic acid and iron (II) with vegetable gum. CONSTITUTION:A water-based compsn. is obtd. by mixing a compsn. contg. L-ascorbic acid and an iron (II) compd. with vegetable gum. Examples of the vegetable gum are guar gum, locust bean gum, gum arabic, tragacanth gum, etc. The content of the vegetable gum is 1-2,000wt% (on a solid basis) based on the combined amount of L-ascorbic acid and the iron (II) compd. When a substrate is coated or impregnated with a compsn. having a gum content of lower than 1wt%, no uniform coating film can not be obtd. and powder dropping is caused, while when the gum content is higher than 200wt%, the substrate can not be uniformly coated or impregnated, the concn. of the two- component compsn. is too low and there is difficulty in imparting bactericidal and deodorizing properties. Thus, the compsn. is of no practical use. |
