WATER-BASED WATER REPELLANT FOR TREATMENT OF SUBSTRATES

摘要

A water-based water repellant for the treatment of substrates made from lignocellulose or the like, characterized by containing a product obtained by copolycondensing 100 parts by weight of (A) an organosilicon compound of the general formula (1) with 0.5 to 49 parts by weight of (B) an amino-containing alkoxysilane of the general formula (2) or a partial hydrolyzate thereof through hydrolysis in the presence of an organic or inorganic acid: (R<1>)a(OR<2>)bSiO(4-a-b)/2 (1) (wherein R<1> is alkyl; R<2> is alkyl; a is 0.75 to 1.5; and b is 0.2 to 3, with the proviso that a and b satisfy the relationship 0.9 < a+b R<4>NR<5>-SiR<6>n(OR<2>)3-n(2) (wherein R<3> and R<4> are each hydrogen, alkyl, or aminoalkyl; R<5> is a divalent hydrocarbon group; R<6> is alkyl; and n is 0 or 1).