| 摘要 |
Wood is modified by treating with an aqueous water repellent [I] and an emulsion water repellent [II]. The aqueous water repellent [I] comprises a product obtained through co-hydrolytic condensation of (A) an organosilicon compound: (R<1>)a(OR<2>)bSiO(4-a-b)/2 and (B) an amino-containing alkoxysilane: R<3>R<4>NR<5>-SiR<6>n(OR<2>)3-n. The emulsion water repellent [II] is a trialkylsiloxysilicate emulsion water repellent obtained by polymerizing (C) an organodisiloxane: R<7>3Si-O-SiR<7>3 and (D) a tetraalkoxysilane: Si(OR<7>)4 in an aqueous solution containing (E) a surfactant and (F) water. Two stages of treatment with repellents [I] and [II] can impart water repellency, minimal water absorption and dimensional stability to wood.
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