| 摘要 |
PROBLEM TO BE SOLVED: To prevent contaminants such as a fingerprint, a dermal lipide, sweat and cosmetics from sticking onto the surface of various kinds of an optical members without the use of a diluent solvent by impregnating a porous molded product with a stainproofing agent containing a specific organic silane compound and heating the molded product in vacuum. SOLUTION: A porous molded product is impregnated with a stainproofing agent containing an organic silane compound represented by the formula and then is heated in a vacuum and further, the stainproofing agent is evaporated to form a coating film on a base material to be treated. If required, the coating film is heated, humidified, irradiated with ultraviolet rays or irradiated with an electron beam or treated by any other means. In the formula, R1 is a 1-16C straight-chain or branched perfluoroalkyl group; n is an integer of 1-50; m is an integer of 0-3; 1 is an integer of 0-3; s is an integer of 0-6, provided, that 6 >=m+1>0; and R is a hydrolytic group. The porous molded product is composed of SiO2, TiO2, MgO, Cu, Fe, Al, stainless steel, carbon and the like. |
