FIELD: chemistry.
SUBSTANCE: present invention relates to a stable lignin-phenol formaldehyde-free mixture for use in lignin-modified phenol-formaldehyde resins, as well as to a method for production and use thereof. Mixture contains between 10–80 wt.% lignin, between 15–90 wt.% phenol and between 0–25 wt.% solubilizer. Lignin is a homogeneous soluble lignin with weight-average molecular weight between 3,000 and 8,000, polydispersity between 2 and 5.
EFFECT: present invention enables to obtain lignin-phenol resins with constant quality and acceptable operating characteristics.
16 cl, 2 dwg, 6 tbl, 2 ex
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