FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing a polycondensation product. A method of producing a polycondensation product is carried out via polycondensation of monomers which include (A) an aromatic or heteroaromatic compound which contains a polyether chain, (B) optionally an aromatic or heteroaromatic compound different from the monomer (A), and (C) an aldehyde which is selected from a group consisting of formaldehyde, acetaldehyde, benzaldehyde, benzaldehyde sulphonic acid and benzaldehyde disulphonic acid, in the presence of a protonation catalyst, wherein said aldehyde is provided by a fast release source and a slow release source thereof.
EFFECT: improved operational characteristics of the finished polycondensation product.
15 cl, 2 tbl, 6 ex
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