FIELD: chemistry.
SUBSTANCE: invention relates to additive, which increases waterproofness. Additive is suitable for production of composite panels and is present in form of emulsion, containing from 10 to 50 wt % of triglyceride with saponification number, at least, 150 and iodine number, at least, 35; from 0.5 to 20 wt % of hydrocarbon wax; from 0.5 to 3 wt % of linear fatty acids C12-C22; compound or compounds, selected from group, consisting of amine in amount from 0.5 to 3 wt % of emulsion; inorganic base in amount from 0.5 to 6 wt% of emulsion and their mixtures; and water. Invention also relates to composite panel, made with application of said additive and method of panel manufacturing.
EFFECT: claimed additive gives composite panels resistance to water absorption and swelling.
13 cl, 3 ex, 2 tbl
