Method for improving the surface hardness of a wooden body...

Details Method for improving the surface hardness of a wooden body... Method for improving the surface hardness of a wooden body...

2003-10-01

2009-02-24

Kiliman, Leszek (Department: 1794)

Stock material or miscellaneous articles

Composite

Of carbohydrate

C428S533000, C428S535000, C428S536000, C428S537100, C427S440000, C422S032000, C524S391000, C524S597000, C528S254000, C528S259000

Reexamination Certificate

active

07494718

ABSTRACT:
A process for the production of a wood body having increased surface hardness, in which an untreated wood body is impregnated with an aqueous solution ofA) an impregnating agent consisting of a 1,3-bis(hydroxymethyl)-4,5-dihydroxyimidazolidin-2-one modified with a C1-5-alcohol, a polyol or mixtures thereof, andB) a catalyst from the group consisting of ammonium or metal salts, organic or inorganic acids or mixtures thereof,dried and then hardened at elevated temperature is described.

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Militz, H., “Treatment of timber with water soluble dimethylol resins to improve their dimensional stability and durability” Wood Science and Technology, vol. 27, pp. 347-355, 1993.
W.D. Ellis, J.L. O'dell, “Wood-Polymer Composites Made with Acrylic Monomers, Isocyanate and Maleic Anhydride”, Journal of Applied Polymer Science, vol. 73, pp. 2493-2505, 1999.
U.S. Appl. No. 12/088,702, filed Mar. 31, 2008, Kingma et al.
U.S. Appl. No. 12/089,209, filed Apr. 4, 2008, Kingma et al.

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