Wood preservative composition and use thereof

US4767458A · kind A · utility

Assignee

• Desowag Materialschutz GmbH · DE

Inventors

• Frank Moewius · Berlin, DE
• Manfred Meisel · Berlin, DE
• Herbert Grunze · Berlin, DE
• Lothar Kolditz · Berlin, DE
• Marina Zeibig · Königs Wusterhausen, DE
• Walfried Oese · Heidenau, DE
• Dietmar Standfuss · Heidenau, DE
• Horst Kirk · Eberswalde, DE
• Reiner Hesse · Darmstadt, DE
• Horst Goetze · Eberswalde, DE
• Wibke Unger · Eberswalde, DE

Key dates

• Filing date: Sep 15, 1987
• Grant date: Aug 30, 1988
• Expiry date: Sep 15, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/662
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A wood preservative based on leaching-resistant, inorganic compounds for protection of wood and wood materials against wood-damaging insects and fungi, including wood-rot fungi, is disclosed. The wood preservative, which is fixed without chromium, contains as active ingredient in an aqueous solution which is stable on impregnation, (a) a Cu(II), Zn, Ni, Co, Fe, Mg and/or Mn salt of monofluorophosphoric acid, or (b) an alkali metal salt and/or ammonium salt of monofluorophosphoric acid, in the presence of a Zn, Ni, Co, Fe, Mg and/or Mn salt of hydrochloric, nitric or sulfuric acid and, optionally in addition to (a) or (b), one or more members of the group comprising NH.sub.3, HCl, HNO.sub.3, H.sub.2 SO.sub.4, HF, alkali metal hydrogen fluoride and ammonium hydrogen fluoride. Alternately, the composition contains (c) an alkali metal salt and/or ammonium salt of monofluorophosphoric acid in the presence of a Cu(II) salt of hydrochloric, nitric or sulfuric acid in a Cu.sup.2+ :PO.sub.3 F.sup.2- ratio of from about 0.5 to 2:1, preferably about 1:1, and, in addition, ammonia, hydrochloric acid, nitric acid, sulfuric acid or hydrofluoric acid, or alkali metal hydrogen fluoride or ammonium…