FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing nylon microspheres and nylon microspheres produced using said method. Described is a method of producing nylon microspheres, involving steps (1), (2) and (3) or steps (1'), (2) and (3), where at step (1) a radically polymerisable monomer is dispersed in a molten lactam monomer and a free-radical polymerisation initiator is added for radical polymerisation of the radically polymerisable monomer to obtain a mixture of a free-radical polymer and a lactam monomer; or at step (1') a mixture of a free-radical polymer and a molten lactam monomer is obtained; and at step (2) an initiator and an activator used for anionic polymerisation with opening of the lactam monomer ring are added to the mixture obtained at step (1), from which the remaining radically polymerisable monomer and water are removed or to the mixture obtained at step (1') for anionic polymerisation with opening of the lactam ring to obtain a polymer alloy of free-radical polymer/polyamide; and at step (3) the free-radical polymer in the molten polymer obtained at step (2) is removed through dissolution to obtain nylon microspheres. The invention also describes nylon microspheres obtained using said method, in which the weight-average molecular weight of nylon is in the range of 1.2×105-6.3×104, and the particle size of the nylon microspheres is in the range of 1.4-318 mcm.
EFFECT: obtaining nylon microspheres with a regular spherical shape and possibility of controlling the particle size and molecular weight of the nylon microspheres.
10 cl, 16 ex, 1 dwg
