METHOD OF PRODUCING FOAM PARTICLES FROM THERMOPLASTIC ELASTOMERS WITH POLYAMIDE SEGMENTS Russian patent published in 2021 - IPC B29C44/34 C08J9/12 C08J9/14 C08J9/232 B29B9/00 B29B9/12 B29B9/16 

FIELD: foam plastic production.

SUBSTANCE: present invention relates to a method for producing foam particles from thermoplastic elastomers with polyamide segments, as well as foam particles and foam molded products. This method includes the following steps: (a) obtaining a suspension of a thermoplastic elastomer granulate in a suspension medium, (b) adding a foaming agent, (c) impregnating the granulate with a foaming agent by heating the suspension in a high-pressure tank to the impregnation temperature (IMT) at the impregnation pressure (IMP), (d) decompressing the suspension by emptying the high-pressure tank through an expansion device and processing the resulting foam particles. The impregnation temperature is from 80 to 180°C, and the impregnation pressure is from 150 to 5500 kPa abs.

EFFECT: obtained foam particles from thermoplastic elastomers have a low bulk density, ranging from 20 to 250 kg/m³, and are suitable for processing into elastic foam molded products with a high ability to elastic after-action.

14 cl, 3 tbl, 16 ex