METHOD FOR ACYLATING A MATERIAL ESPECIALLY CONTAINING CELLULOSE AND/OR HEMICELLULOSE AND/OR LIGNIN, AND MATERIAL OBTAINED THEREBY

摘要

The invention relates to a method for acylating a material especially containing cellulose and/or hemicellulose and/or lignin. The aim of the invention is to acylate the material to a large extent, in mild reaction conditions, and to provide acylated materials which are water-repellent and can be easily subsequently processed with thermoplastic materials to form composite materials. According to the invention, the material is reacted with a mixture containing a) between 5 and 95 mass % of isopropenylacetate and b) between 95 and 5 mass % of at least one carboxylic acid and/or at least one carboxylic acid anhydride at a reaction temperature of between 20 and 200 °C and with a retention time of between 2 minutes and 48 hours in the presence of a catalyst. The invention also relates to an acylated material produced according to said method, and a composite material containing one such material.