METHOD FOR OBTAINING DEHYDRATION RESIN BASED ON POLYSACCHARIDES OF VEGETABLE RAW MATERIALS Russian patent published in 2024 - IPC C09F1/00 C13K13/00 C09J197/00 C09J199/00 

FIELD: woodworking industry.

SUBSTANCE: invention can be used as an adhesive in manufacturing of wood composite materials (WCM) or in the foundry industry as a mould fixer. A method for producing a dehydration resin is claimed, including carrying out acid hydrolysis of polysaccharides of plant materials to monosaccharides, their dehydration and oligomerization, and hydrolysis of plant materials is carried out with sulfuric acid at a temperature of 140-180°C, mass humidity 40-60% for 30-120 min and sulfuric acid consumption of 2-5% by weight of dry plant material, and for dehydration and oligomerization of the obtained monosaccharides, the resulting hydrolysate mass is dried with air at a temperature of 120-250°C to a residual moisture content of less than 7% and a mass temperature of not more than 95°C, with subsequent isolation of the resin from the dry hydrolysate mass by water extraction at a temperature of 70-80°C, acid neutralization of the extract to pH 4.5 with lime or chalk, separating the precipitate and evaporating the neutralized extract under vacuum to a solids concentration of 55-65%.

EFFECT: simplification of the technological scheme for obtaining dehydration resin by hydrolysis of plant raw materials from polysaccharides, due to the use of sulfuric acid in the hydrolysis of plant materials.

3 cl, 1 tbl, 4 ex