COMPOSITION BASED ON POLYMER POWDER OBTAINED BY MULTISTAGE METHOD, METHOD OF ITS PRODUCTION AND APPLICATION Russian patent published in 2018 - IPC C08F265/06 C08L27/06 C08J9/04 

FIELD: chemistry.

SUBSTANCE: present invention relates to a polymeric processing aid in the form of a non-dusting polymer powder for thermoplastic polymers. Polymer composition is proposed in the form of polymer particles for technological addition to thermoplastic polymers, comprising at least one layer (B), comprising polymer (B1), having a glass transition temperature between 80 °C and 150 °C, and at least one layer (A), comprising polymer (A1), having a glass transition temperature between -50 °C and 50 °C and a weight average molecular weight of less than 1,000,000 g/mol, and also containing at least 50 % by weight of polymer units formed by ethyl acrylate, obtained by a multistage method, the mass fraction r of the layer (A) in the composition containing the two layers, is at least 2 % by weight. Method for producing the claimed polymer composition, composition based on a chlorine-containing polymer for a technological additive to thermoplastic polymers based on the claimed composition, as well as the use of the claimed composition as a processing aid for a composition containing a chlorinated thermoplastic polymer.

EFFECT: present composition is process-oriented, since it has a low content of fine particles, and is easily processed together with a thermoplastic polymer.

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