APPLICATION OF MONOSUBSTITUTED SUCCINIC ANHYDRIDE Russian patent published in 2021 - IPC C08K3/26 

FIELD: polymer processing.

SUBSTANCE: group of inventions relates to the use of at least one monosubstituted succinic anhydride prior to the extrusion of a polymer composition containing polylactic acid as a polymer component and at least one material containing calcium carbonate as a filler, as well as a method for reducing the decomposition of the polymer during processing and reducing the melt flow rate of a polymer composition containing polylactic acid as a polymer component and at least one material containing calcium carbonate as a filler, for the use of a polymer composition obtained by using a technological process that includes the following steps: a) supplying at least one polylactic acid as a polymer component, b) supplying at least one material containing calcium carbonate as a filler, c) supplying at least one monosubstituted succinic anhydride, d) bringing into contact components a), b) and c) in any order; and e) compounding the components brought into contact in step d), as well as to an article containing the polymer composition obtained using the above-mentioned technological process.

EFFECT: invention makes it possible to reduce the decomposition of the polymer during processing and/or to reduce the melt flow rate of such an extruded polymer, as well as to facilitate the processability of the polymer composition.

15 cl, 3 dwg, 5 tbl