Patent ID: 11930817
Assignee: nan
Field: Basic materials chemistry (Chemistry)
Classification: CPC A  B  C | IPC A  B  C

Claim 0:
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,
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 capping agent is selected from the group consisting of a mono alcohol, a secondary amine, a primary amine with alkyl chain greater than C15 and mixtures thereof; and further wherein the molecular weight of the polyol is greater than or equal to 2700.