FIELD: chemistry.
SUBSTANCE: invention describes a method of producing an interpolymer complex via radical polymerisation of methacrylic acid on a polymer matrix - polyethylene glycol in the presence of a polymerisation initiator while heating in a solvent medium, characterised by that polymerisation is carried out at temperature 80-95°C in the medium of an organic solvent - mixture of toluene and cyclohexane, taken in ratio 25-50 - 75-50 wt %, respectively, with molar ratio methacrylic acid: polyethylene glycol: solvent equal to 1:1:(6.5-13.5), followed by filtration and drying.
EFFECT: obtaining an interpolymer complex in form of a homogeneous finely dispersed powder with low residual monomer content and high output.
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