FIELD: wood industry.
SUBSTANCE: modified phenol-formaldehyde resin includes components in the following ratio, wt %: Phenol-formaldehyde resin (70-95); as a modifier of pectol (5-30). To prepare pectol, chemicals are prepared: tall oil and pitch. Load chemicals into the emulsifier and cook with a continuous stirring mixture of 60% pitch of tallow with 40% tallow oil for 60 minutes when heated by steam to a temperature of at least 70°C.
EFFECT: improving the quality of phenol-formaldehyde adhesives, increasing the strength of the adhesive joint, improving the environmental friendliness of production through the use of sulphate-cellulose waste.
2 cl, 6 tbl
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