Polymeric wood preservative compositions

Compositions: coating or plastic – Coating or plastic compositions – Contains fireproofing or biocidal agent

Reexamination Certificate

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C424S078090, C424S405000, C424S618000, C424S630000, C424S632000, C424S633000, C424S634000, C424S637000, C424S638000, C424S641000, C424S646000, C424S650000, C424S652000, C424S654000, C424S655000, C424S682000, C427S297000, C427S393000, C524S434000

Reexamination Certificate

active

07001452

ABSTRACT:
The present invention relates to a method and a wood preserving composition which is free of poly-aspartic acid and its derivatives and comprises mixtures of a metal compound, complexing agents selected from ethanolamines, polyethylenimine, ammonia or a mixture of these compounds, and a vinyl based polymer selected from poly(vinyl alcohol) (PVA), poly(acrylamide) (PA), poly(N-vinyl pyrrolidone) (PVP) and poly(N-isopropyl acrylamide) (PNIPAM). The resulting metal amine solution can then be used to formulate a variety of metal-based cellulosic material preserving products.

REFERENCES:
patent: 5874025 (1999-02-01), Heuer et al.
patent: 6843837 (2005-01-01), Zhang et al.

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