FIELD: chemistry.
SUBSTANCE: invention relates to a method of introducing an additive into a polymeric material, which comprises using a liquid composition containing an additive such as a colorant and a carrier comprising an aliphatic or aromatic tri- or dicarboxylic acid covalently linked to two or more circuits by ester groups. Method comprises bringing the liquid composition into contact with the polymer material in an apparatus for molding from melt. Proposed method uses a rotary cavity mixer.
EFFECT: then fibres may be obtained.
17 cl, 1 dwg, 1 tbl, 7 ex
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