| 摘要 |
PROBLEM TO BE SOLVED: To provide a modifying method for a surface by which efficiency of a process and expense is contrived and such general-purpose properties are held that are capable of applying to not only ordinary material of construction but also reutilization of waste by using crude silane as a surface modifier for giving water repellency to earth and sand, powder and granular material. SOLUTION: In the modifying method for the surface of earth and sand, powder and granular material, a crude reaction product (crude silane) of silicon and methyl chloride or chlorobenzene is directly used as a surface modifier. A high reactive chlorine atom bonding to a silicon atom with a hydrocarbon group immediately takes the hydrogen atom of a hydroxyl group on the surface of material to be worked and becomes hydrogen chloride. The remaining oxygen atom bonds to a silicon atom having strong affinity and forms a water repellent trimethyl siloxy group and triphenyl siloxy group. Also, since these silanes are a monomer, molecular length is several to ten-addÅand extremely small and permeability is good. Further, stability is excellent because a film is not formed but chemical bonding of both a water repellent group and the surface of material to be worked is caused.
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