Process for pigmenting wood

US6645257B1 · kind B1 · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Hans-Thomas Schacht · Rheinfelden (Baden), DE
• Gilbert Moegle · Magstatt-le-Bas, FR
• Reiner Jahn · Müllheim, DE
• Christiane Griessen · Basel, CH
• Peter Scheibli · Bottmingen, CH

Key dates

• Filing date: Sep 15, 2000
• Grant date: Nov 11, 2003
• Expiry date: Jan 30, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B27K5/02
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A process for pigmenting wood, which comprises treating wood in succession:a) with a solution comprisingfrom 0.01 to 80% by weight, based on the solution, of a compound of the formulaA(B)x  (I),in which x is an integer from 1 to 8,A is the radical of a chromophore of the quinacridone, anthraquinone, perylene, indigo, quinophthalone, indanthrone, isoindolinone, isoindoline, dioxazine, azo, phthalocyanine or diketopyrrolopyrrole series which is attached to x groups B via one or more heteroatoms, these heteroatoms being selected from the group consisting of N, O and S and forming part of the radical A,B is hydrogen or a group of the formula  at least one group B not being hydrogen and, if x is a number from 2 to 8, the groups B being identical or different, andL is any desired group suitable for solubilization; andfrom 0.05 to 5% by weight, based on the solution, of a salt of the formulaKat+.An−  (II),Kat+.½An2−  (III)orKat+.⅓An3−  (IV),in which Kat+ is lithium, sodium, potassium or ammonium, An− is formate, acetate, propionate or hydrogen carbonate, An2− is oxalate, maleate, fumarate, ma…