METHOD OF IMPROVING FLOW PROPERTIES OF POLYMER MELTS Russian patent published in 2016 - IPC C08L53/00 C08F10/02 C08F10/06 C08F20/18 C08F220/18 C08L23/04 C08L23/10 C08L33/08 C08L33/10 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of improving flow properties of a melt comprising a thermoplastic polymer, which includes adding to a composition of said thermoplastic polymer before or during treatment of the melt 0.005-0.5 wt %, relative to the weight of the thermoplastic polymer, of one or more comb copolymers or comb block copolymers which are obtained at a first step a) by free-radical polymerisation of an alkyl ester of acrylic or methacrylic acid with 1-10 carbon atoms in the alkyl group and, optionally, one or more monomers without an ester bond, and at a second step b) by modification in a polymer analogous transesterification reaction with a primary or secondary alcohol to form a comb or comb block copolymer. The object of the invention is also the use of said comb copolymers or comb block copolymers to improve flow properties of a melt comprising a thermoplastic polymer.

EFFECT: obtained comb copolymers or comb block copolymers reduce power consumption required for processing thereof, and reduce the risk of abruptions in the melt at high shearing rates.

13 cl, 15 tbl, 39 ex