METHOD OF PRODUCING MOULDED ARTICLES IN FORM OF FIBRES AND THREADS MADE FROM HETEROCYCLIC POLYAMIDES Russian patent published in 2013 - IPC C08G73/14 D01F6/74 

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of producing moulded articles in form of fibres and threads made from a heterocyclic aromatic polyamide. Disclosed is a method of producing moulded articles from a heterocyclic aromatic polyamide, involving polycondensation of terephthaloyl chloride with a mixture of aminoimine 5(6)-amino-2(para-iminoquinone) benzamide, having melting point of 235±3°C, with aromatic diamine 5(6)-amino-2(para-aminophenyl) benzimidazole, having melting point of 216±3°C, with content of the latter of 5-60 wt % and para-phenylene diamine in amount of 0-30 wt %. The obtained polycondensation solution with dynamic viscosity of 300-800 P is homogenised, moulded into a settling aqueous-organic bath, washed, dried at temperature not higher than 120°C. The end products can be used to produce high-strength composite materials, articles operating under high loads, fabrics for making protective articles etc.

EFFECT: obtained articles have improved physical and mechanical properties (breaking tenacity, modulus of elasticity, breaking stress in microplastic) with low fluctuation of characteristics.

2 cl, 1 dwg, 5 tbl, 5 ex