HARDLY WASHABLE WATER-SOLUBLE PREPARATION FOR WOOD PROTECTION

摘要

FIELD: woodworking industry.;SUBSTANCE: invention relates to woodworking industry, in particular, to wood protection preparations. Difficult leaching water-soluble preparation for wood protection contains compounds of chromium, copper and fluorine - boron hydrofluoric acid or hydrofluorosilicic acid, with following ratio of components: (0.4–1.3):(0.6–1.5):(0.3–0.9) in terms of Fluorine F(I): Chromium Cr(VI): Copper Cu(II). To hydrofluorosilicic acid additionally introduced is sodium tetraborate Na₂B₄O₇·10H₂O or potassium tetraborate, and the composition with hydrofluorosilicic acid additionally introduces either sodium orthosilicate Na₄SiO₄ or sodium metasilicate Na₂SiO₃ or ammonium orthosilicate (NH₄)₄SiO₄ or ammonium metasilicate (NH₄)₂SiO₃, depending on the anionic composition of the preparation in amount from 0.3 % to 4 %.;EFFECT: reduced rate and degree of hydrolysis, high pH, reduced rate of de-conservation of wood.;1 cl, 3 tbl