Preparing a chemically stabilized substrate of wood material, useful to safeguard it against various types of chemical, biological and/or physical aggressions, comprises contacting the substrate with polycarbamate or polyurethane compound

摘要

Preparation of a chemically stabilized substrate of wood material comprises contacting the substrate with polycarbamate or polyurethane compound (I) having a molecular weight of =500 g/mole. Preparation of a chemically stabilized substrate of wood material comprises contacting the substrate with polycarbamate or polyurethane compound of a molecular weight of =500 g/mole, where (I) is of formula R1-O-CO-NH-C 6H 3(CH 3)-NH-CO-O-(R2-O) n-H. R1 : 1-10C alkyl e.g. C 2H 5; R2 : 2-3C alkylene e.g.ethylene; and n : greater than 6, preferably greater than 10. An independent claim is included for a substrate comprising wood material and polycarbamate or polyurethane compound at 5 wt.%, preferably 30 wt.%.