COMPOSITION FOR PRODUCING BIODEGRADABLE POLYMER MATERIAL AND BIODEGRADABLE POLYMER MATERIAL ON ITS BASIS Russian patent published in 2023 - IPC C08L3/02 C08L29/04 C08L101/16 C08K5/05 C08J5/18 

FIELD: polymer materials.

SUBSTANCE: group of inventions: a composition for obtaining a biodegradable polymeric film material and a biodegradable polymeric film material itself. This composition contains components in the ratio, wt.%: starch - 0.8-1.2, polyvinyl alcohol - 1.1-2.5, glycerin - 3.5-5.5, acid - 0.2-0,5, ethyl alcohol - 0-8.4, chokeberry or cranberry juice - 0-1, water - the rest. The acid is selected from adipic, citric, phosphoric, oxalic, succinic acids. Biodegradable polymeric film material based on this composition contains in the ratio, wt.%: starch - 10.22–14.40, polyvinyl alcohol - 17.22–26.05, glycerin - 47.23–56.23, acid - 2.30–5.48, chokeberry or cranberry juice - 0-9.84 and water - the rest.

EFFECT: increase strength of the resulting film (increased ultimate tensile stress); reducing the time of biodegradation of the material in the soil; decrease in the degree of sorption of water vapor.

2 cl, 1 dwg, 1 tbl, 9 ex