METHOD OF PREPARING A SHEET OF A LIGNOCELLULOSIC MATERIAL AND METHOD OF MANUFACTURE OF A FINISHED PRODUCT THEREFROM

WIPO Patent Application WO1997032074

A3

A method of preparing a sheet of a lignocellulosic material such as paper for the manufacture of a finished product, includes the steps of impregnating the sheet with an impregnating composition comprising a composition for the chemical modification of the lignocellulosic material containing a dicarboxylic anhydride or a tricarboxylic anhydride dissolved in a suitable non-aqueous solvent, and a composition for resinating the lignocellulosic material containing an isocyanate thermosetting resin dissolved in a suitable non-aqueous solvent. Thereafter any excess of the impregnating composition is removed from the impregnated lignocellulosic material and the non-aqueous solvent or solvents are removed. Subsequently the sheet of lignocellulosic material so treated may be used in a method of forming an article by adhering a sheet so treated to a second sheet optionally so treated, with a suitable adhesive material. The result is a product which may be used as a building board or the like.

WO/2003/068496	TRANSPARENT OR TRANSLUCENT MULTI-LAYER SUPPORT WITH AN IRIDESCENT APPEARANCE
WO/2007/140009	REPULPABLE MOISTURE VAPOR BARRIER
JP2000198265	IMAGE RECORDING MEDIUM FOR INK JET

SYMONS MICHAEL WINDSOR (ZA)

PCT/GB1997/000440

October 17, 2002

February 14, 1997

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WINDSOR TECHNOLOGIES LTD (BS)
SYMONS MICHAEL WINDSOR (ZA)

B32B29/06; D21H23/22; D21H23/42; D21H17/08; D21H17/15; D21H25/06; (IPC1-7): D21H23/22; D21J1/08; B27K3/15; B32B31/00

WO1996013468A1

1996-05-09

US5385754A	1995-01-31
US5280097A	1994-01-18
US5008359A	1991-04-16
US3666593A	1972-05-30
US4505778A	1985-03-19
US4332925A	1982-06-01

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