Polymeric wood preservative compositions
US7001452B2 · kind B2 · utility
5Cited by
2References
70Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 11, 2004 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Nov 11, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L79/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.