CPC B27K 3/153 (2013.01) [A01N 25/02 (2013.01); A01N 43/58 (2013.01); B27K 3/343 (2013.01); B27K 3/50 (2013.01); C08G 18/4825 (2013.01)] | 12 Claims |
1. A method for preserving wood comprising:
contacting wood with a wood preservation composition comprising
a) a polyurethane polymer synthesized from
i) a polyol comprising >95% p-propylene oxide, and
ii) an isocyanate
b) an organic solvent; and
c) at least one wood preservative active comprising a halogenated isothiazolone biocide, a halogenated carbamate fungicide an azole fungicide or a combination thereof;
wherein the isocyanate to polyol molar ratio of the polyurethane polymer is from less than or equal to 0.8 to greater than or equal to 0.1.
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