Process for penetrating difficult-to-treat wood with wood preservative liquids

Abstract

An improved process for penetrating of difficult-to-treat wood with preservative liquids containing metal salts is described. More particularly, the improved process comprises the steps of contacting the wood with a mixture comprising (A-1) a preservative-effective amount of at least one hydrocarbon-soluble metal salt of an organic carboxylic acid wherein the metal is selected from the group consisting of transition metals, zinc, mercury, antimony and lead, and (A-2) a hydrocarbon solvent comprising at least 50% by weight of at least one petroleum distillate. The solvent utilized in the process of the invention optionally may contain one or more aromatic hydrocarbons. Preferably the solvent (A-2) will comprise at least about 50% of at least one paraffinic hydrocarbon having a boiling point above 130.degree. C. The mixture also may contain other desirable components in addition to the metal salts such as insecticides, flame retardants, colorants, fungicides, water repellents, etc. In a preferred embodiment, the metal salt of the organic carboxylic acid utilized in the process is a fungicide.

Dependencies are inferred from the claim text.