| 摘要 |
Provided is a stain-proofing agent which forms a super hydrophilic stain-proofing film upon application to a surface of a substrate, which comprises using fumed silica dispersed in an aqueous solvent. Lasting stain-proofing property is imparted to the surface of a building material by the stain-proofing agent according to the invention. There are many single silanol groups which participate in hydrophilicity on the surface of fumed silica. The fumed silica has a high fixing property to the surface of a substrate and thus imparts lasting stain-proofing property to the surface of the substrate.
|
