| 摘要 |
PROBLEM TO BE SOLVED: To obtain a water-based water repellent having excellent water solubility and storage stability, usable as a water repellent for wood only by dilution with water, providing wood with excellent water repellency and antimicrobial/mildewproofing properties and termite-proofing properties by coating or impregnation. SOLUTION: This water-based water repellent for antinicrobial, mildewproofing and termite-proofing wood is characterized by comprising (A) an organosilicon compound represented by the formula: (R<1> )a (OR<2> )b SiO(4-a-b)/1 (R<1> is an alkyl group R<2> is an alkyl group; (a) is 0.75-1.5; (b) is 0.2-3 and 0.9<a+b<=4.0), (B) an amino group- containing alkoxysilane represent by the formula: R<3> R<4> NR<5> -SiR<6> n (OR<2> )3-n (R<3> and R<4> are each H, an alky group or an aminoalkyl group; R<5> is a bifunctional hydrocarbon group; R<6> is an alkyl group; n is 0 or 1) or its partial hydrolyazate, (C) a quaternary amino group-containing alkoxysilane represented by formula [(CH3 )2 R<7> N(CH2 )3 -SiR<6> n (OR<2> )3-n ]<+> X<-> (R<7> is a monofunctional hydrocarbon group; n is 0 or 1) or its partial hydrolyzate and (D) a substance obtained by subjecting a boric acid compound to a cohydrolytic condensation in the presence of an organic acid or an inorganic acid.
|
