Copper complexes and their use as wood preservatives
AssigneeE. I. Du Pont de Nemours and Company
InventorsALBERT GORDON ANDERSON, MARK A. SCIALDONE
Life of this patent
Estimating the term…
Abstract
This invention relates to wood preservatives containing copper complexes that significantly reduce the decay of wood, cellulose, hemicellulose, and lignin caused by fungi and insects. The copper complexes include a chelating compound that has amide functional groups derived from hydration of a cyanoethylated compound or carboxylic acid functional groups derived from hydrolysis of a cyanoethylated compound, or both types of groups.
Claims4
A process for preserving cellulosic material, or an article that comprises cellulosic material, comprising contacting the cellulosic material or article with a composition comprising:
- an aqueous solution of:
- (a) a copper complex of a chelating compound comprising three or more amide and/or carboxyl groups and greater than 10 carbon atoms;
- and
- (b) ammonia, ethanolamine or pyridine in an amount sufficient to solubilize the copper complex;
- wherein the pH of the solution is between about 10 and about 11.
Dependencies are inferred from the claim text.