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US 12,557,809 B2Granted
Wood preservatives
OwnerSelvanathan Arumugam, David A. Laganella +1inventors
InventorsSelvanathan Arumugam, David A. Laganella, Randall W. Stephens
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Abstract
A wood preservative composition and method for preserving wood by contacting wood with said composition comprising a polyurethane polymer, non-aqueous solvents, and a wood preservative active.
Claims8
A method for preserving wood comprising:
- contacting wood with a non-aqueous wood preservation composition comprising
- a) a polyurethane polymer synthesized from
- i) a polyol comprising >95% p-propylene oxide,
- ii) an isocyanate, and
- iii) a capping agent;
- b) an organic solvent;
- and
- c) at least one wood preservative active selected from among halogenated isothiazolone biocides, halogenated carbamate fungicides and azole fungicides;
- wherein the organic solvent comprises diesel, and the capping agent is selected from the group consisting of a mono alcohol with alkyl chains greater than or equal to C5 and a secondary amine with alkyl chains greater than or equal to C14 and mixtures thereof;
- and
- further wherein the molecular weight of the polyol is greater than or equal to 2000.
8 more elements
A non-aqueous wood preservation composition comprising
- a) a polyurethane polymer synthesized from
- i) a polyol comprising >95% p-propylene oxide,
- ii) an isocyanate, and
- iii) a capping agent;
- b) an organic solvent;
- and
- c) at least one wood preservative active selected from among halogenated isothiazolone biocides, halogenated carbamate fungicides and azole fungicides;
- wherein the organic solvent comprises diesel, and the capping agent is selected from the group consisting of a mono alcohol with alkyl chains greater than or equal to C5 and a secondary amine with alkyl chains greater than or equal to C14 and mixtures thereof and further wherein the molecular weight of the polyol is greater than or equal to 2000.
5 more elements
Dependencies are inferred from the claim text.