PARTICLES CONSISTING OF PARA-ARAMID COMPOSITE MATERIAL AND ADDITIONAL MATERIAL Russian patent published in 2012 - IPC D01F1/02 D01F6/60 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing particles from a polymer-additive composite material by: i) drawing a solution through a draw plate to obtain a fibre mass, fibril or a fibre product, wherein the solvent of the solution is selected from N-methyl-2-pyrrolidone, N,N'-dimethyl formamide, N,N'-dimethyl acetamide, tetramethyl urea, and 4-75 wt % composition consisting of 2-80 wt % para-aramid polymer and 20-98 wt % solid additional material to a total of 100 wt %, and where the aramid polymer is dissolved in the solvent, or ii) coagulation of the solution using a rotor-stator apparatus wherein the polymer solution is deposited through the stator onto the rotor such that the precipitated particle of the polymer-additive composite material is subject to shearing forces while in plastic deformation state. The aramid is preferably poly(para-phenylene terephthalamide) - PPTA. The additional material is selected from kaolin, talc, diatomite, zeolite, graphite, mineral fibre, calcium carbonate, barium sulphate, mica, dyes, pigments such as TiO₂ and metal particles. The solution can be used to obtain particles such as fibre products, fibre mass and fibrils used in paper production.

EFFECT: simple process of producing paper and achieving optimum adhesion between additional materials and a polymer matrix.

11 cl, 6 tbl, 16 ex