FIELD: chemical industry.
SUBSTANCE: invention relates to a method of producing linear polyamide-6, which is used for processing into threads and fibers for technical and textile purposes, plastics, composite materials, machine parts and household products. Method of producing polyamide-6 involves successively carried out two-step polymerisation of caprolactam at temperature of 210–215 °C in the presence of an initiator—water in amount of 1.0–1.3 wt.%, obtaining granulate PA-6 from melt by underwater granulation, subsequent continuous combined drying-demonomerisation in solid phase of the obtained equilibrium polyamide-6 granulate at temperature of 150–160 °C and duration of process of 46–48 hours.
EFFECT: obtaining equilibrium low-viscosity polyamide-6 granulate for 46–48 hours in the presence of an initiator—water in amount of 1,0–1,3%.
1 cl, 1 tbl, 12 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR PRODUCING POLYAMIDE-6 | 2023 |
|
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|
SU1511260A1 |
