Additives for use in wood preservation
AssigneeArch Timber Protection Limited
InventorsKevin HUGHES, Craig MARS, Andrew HUGHES
Life of this patent
Estimating the term…
Abstract
The present invention relates to a wood preservative formulation comprising a biocidal agent which is a copper or zinc ion complexed with an amino compound selected from the group consisting of ammonia, a water soluble amine or alkanolamine and an aminocarboxylic acid and a stabilizer, as well as to aqueous treatment solutions comprising such a formulation and methods of treating wood or other cellulosic material utilising said formulation.
Claims19
A wood preservative formulation, comprising:
- a biocidal agent which comprises copper complexed with an amino compound selected from the group consisting of ammonia, a water soluble amine or alkanolamine and an aminocarboxylic acid;
- and
- a stabilizer, said stabilizer selected from the group consisting of cationic polymers, enzymes, organic polymers, quaternary ammonium compounds, and mixtures thereof, wherein the quaternary ammonium compounds are selected from the group consisting of trimethyl alkyl quaternary ammonium compounds, dialkyldimethyl quaternary ammonium compounds and polyethoxylated quaternary ammonium compounds,
- wherein the biocidal component further comprises biocidal metal compounds, boron containing biocides, and organic fungicides selected from the group consisting of amides, anilides, anilinopyrimidine, aromatic compounds, fungicidal heterocyclic compounds, strobilurins, azoles, isothiazolones, cyclohexylhydroxydiazene 1-oxide, potassium salt, pyrion compounds, quaternary ammonium compounds and mixtures thereof,
- wherein the stabilizer is present in an amount effective to stabilize the preservative composition which allows the wood preservative component to effectively penetrate a wood substrate intended to be protected by the wood preservative composition.
A wood preservative formulation, comprising:
- a biocidal agent which comprises a copper ion complexed with an amino compound selected from the group consisting of ammonia, a water soluble amine or alkanolamine, and an aminocarboxylic acid;
- and
- a stabilizer, wherein the stabilizer is a quaternary ammonium compound selected from the group consisting of trimethyl alkyl quaternary ammonium compounds, dialkyldimethyl quaternary ammonium compounds, polyethoxylated quaternary ammonium compounds, and mixtures thereof,
- wherein the biocidal component further comprises biocidal metal compounds, boron containing biocides, and organic fungicides selected from the group consisting of amides, anilides, anilinopyrimidine, aromatic compounds, fungicidal heterocyclic compounds, strobilurins, azoles, isothiazolones, cyclohexylhydroxydiazene 1-oxide, potassium salt, pyrion compounds, quaternary ammonium compounds and mixtures thereof,
- wherein the stabilizer is present in an amount effective to stabilize the preservative composition which allows the wood preservative component to effectively penetrate a wood substrate intended to be protected by the wood preservative compositioner is present in an amount to inhibit the anti-penetrative effects of anionic by-products and timber extractives present in the preservative formulation thereby improving the ability of the wood preservative component to penetrate a wood substrate intended to be protected by the wood preservative formulation, and
- wherein the amount of the stabilizer polymer is less than the copper ion.
A method of stabilizing a wood treatment formulation that contains a copper ion complexed with an amino compound selected from the group consisting of ammonia, a water soluble amine or alkanolamine, and an aminocarboxylic acid, comprising:
- adding a stabilizer to the wood treatment formulation, wherein the stabilizer is present in an amount to inhibit the anti-penetrative effects of anionic by-products and timber extractives present in the preservative formulation thereby improving the ability of the wood preservative component to penetrate a wood substrate intended to be protected by the wood preservative formulation, and wherein the amount of the stabilizer polymer is less than the copper ion.
Dependencies are inferred from the claim text.