Wood preservative

Details Wood preservative Wood preservative

1989-12-13

1991-01-29

Seidleck, James

Stock material or miscellaneous articles

Composite

Of carbohydrate

428541, 527400, 527403, B27K 300, B27K 338

Patent

active

049885766

ABSTRACT:
A wood preservative composition comprising a lignosulfonate copolymer and a metal salt or a combination of metal salts. The copolymer is a reaction product of lignosulfonate and acrylic monomers selected from a group of acrylic compounds of the general formula, RCH=CR.sup.1 COOH, where R is hydrogen, an alkyl or carboxyl group and R.sup.1 is hydrogen or an alkyl group, and the metal salt is a salt of sulfate, chloride, phosphate, or carbonate wherein the metal is selected from the group consisting of copper, zinc, mercury and lead. Alternatively, the composition may be a metal salt or a combination of metal salts of a lignosulfonate copolymer produced by base exchange of the corresponding calcium lignosulfonate copolymer with a metal salt or metal salts. The composition may be used, optionally, together with methylol phenol.

REFERENCES:
patent: 4661382 (1987-04-01), Cook
patent: 4752509 (1988-06-01), Simonson et al.
patent: 4871825 (1989-10-01), Lin
patent: 4891415 (1990-01-01), Lin et al.

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