| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for surface-treating a rubber article to impart nonstickiness, lubricity, and other barrier effects thereto which method comprises surface-treating the rubber article in an unvulcanized or vulcanized state with a treatment solution prepared by mixing an aqueous formic acid or acetic acid solution having a specified concentration with hydrogen peroxide in an amount corresponding to a specified molar ratio of the acid and epoxidizing the surface layer of the product. SOLUTION: An aqueous solution containing 1-20 wt.% organic acid such as acetic acid or formic acid is mixed with hydrogen peroxide in an amount corresponding to a hydrogen peroxide/organic acid molar ratio of 1.5-20 to prepare a peracetic acid or performic acid treatment solution having a peroxy acid concentration of 1-4 wt.%. Next an unvulcanized or vulcanized rubber article comprising a natural rubber or a synthetic diene rubber is surface-treated by immersion in the treatment solution to epoxidize a part of the double bonds on the surface layer of the article to thereby obtain a surface-treated article improved in abrasion resistance, chemical resistance, gas barrier properties, wet grip performances, surface gloss, and coating film transparency. The organic peroxy acid is represented by the formula: RCO3H and is exemplified by performic acid, peracetic acid, perbenzoic acid, or perphthalic acid. |
