INTERMITTENT REACTOR AND ITS APPLICATION FOR POLYMERISATION OF LACTONS Russian patent published in 2015 - IPC C08G63/08 B01J19/18 B01J8/00 

FIELD: chemistry.

SUBSTANCE: claimed invention relates to production of multifilament finer or polymer drops composed of polylacton obtained by polymerisation of L-lactide, D-lactide, D,L-lactide, meso-lactide, glycolidea, ε-caprolactone, carnonate tri-methylene or mixes thereof. Polymerisation is carried out in intermittent reactor provided with at least one mixer and driven piston to extract reaction product via at least one spinneret. Said process comprises the steps that follow. a) Preparation of reaction mix containing L-lactide, D-lactide, D,L-lactide, meso-lactide, glycolidea, ε-caprolactone, carnonate tri-methylene or mixes thereof, catalyst and, optionally, molecular mass regulator and other additives. b) Loading of said dry or fused mix into reactor. Thereafter reactor working volume is closed tightly by the piston. c) Polymerisation is performed in reactor heated to temperature higher than monomer fusion point at mixing. Note here that mixing elements can up and lower to different height irrespective of the piston. d) Reaction product is extracted from the reactor by extruding the polylacton melt through at least one spinneret to get monofilament fibre or polymer drops.

EFFECT: production of polylacton of different chemical composition.

11 cl, 1 dwg, 1 tbl, 11 ex