Wood impregnation
AssigneeWood Polymer Technologies ASA
InventorMarc H. Schneider
Life of this patent
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Abstract
The present invention relates to a wood-polymer composite, particularly wood which has been impregnated with a mixture containing polymerizable organic compounds, and more particularly to a method for preparing a wood-polymer-composite by impregnating wood material and/or wood-based material with a mixture containing polymerizable organic compounds, and most particularly uses thereof.
Claims21
Wood-polymer composite, characterized by wood impregnated with polymerizable monomers selected from a group consisting of styrene, methylstyrene and tertiary butylstyrene, initiated with at least three initiators;
- crosslinked with divinyl benzene, ethylene glycol dimethacrylate, 1,3-butylene glycol dimethacrylate, ethylene glycol trimethacrylate or trimethylol propane trimethacrylate and containing oil or wax as a polymerization moderator and water repellent for the finished product.
Wood-polymer composite according to any of the preceding claims, characterized in that said composite containing said polymerized monomers has a density of from about 0.8 g/cc to about 1.2 g/cc.
Wood-polymer composite according to any of the preceding claims, characterized in that said composite untreated with said polymerizable monomers has an average moisture content from about 3 to about 90%, and the moisture content of said composite treated with said polymerizable monomers is from about 0 to about 50%.
Wood-polymer composite according to any of the preceding claims, characterized in that said composite is a round, sawn or laminated wood product.
Method for preparing a wood-polymer composite by impregnating wood material and/or wood-based material,
- characterized by the steps of:
- utilizing said wood material having a moisture content of from about 15 to about 35% based on the weight of said wood material;
- impregnating said wood material with a composition selected from a group consisting of polymerizable monomers, a crosslinker and at least three initiators by means of vacuum and/or pressure;
- and curing said impregnated wood material in a hot air oven, steam or hot oil by means of a temperature sufficient to achieve the desired polymer loading.
Dependencies are inferred from the claim text.