POLYESTERS AND ARTICLES MADE THEREFROM Russian patent published in 2018 - IPC C08G67/02 B32B27/36 C09D167/02 C08J5/18 

FIELD: biotechnology.

SUBSTANCE: present invention relates to articles made of poly(trimethylene-furandicarboxylate). Described is an article, comprising: a substrate comprising a first surface and a second surface, wherein the second surface is in contact with the external environment, wherein the substrate comprises a polymer comprising poly(trimethylene furancarboxylate), having a repeating unit of the formula:

,

where n is from 10 to 1000, where the content of poly (trimethylene furancarboxylate) is from 0.1 to 99.9 % of the total polymer weight and wherein the polymer provides improved gas barrier properties of the substrate compared to a substrate made from freshly prepared poly (ethylene terephthalate) (PET), expressed as

where G_PTF is the measured gas barrier value for PTF and G_PET is the measured gas barrier value for PET, where the barrier properties for oxygen, carbon dioxide or moisture are measured according to ASTM D3985-05, ASTM F2476-05, ASTM F1249-06, respectively, where the improvement with respect to oxygen is 2–99 %, the improvement with respect to carbon dioxide is 11–99 % and the improvement in moisture is 3–99 %. Also described is a polymer composition for improving the gas barrier properties of an article, comprising at least one of: i) a poly(trimethylenefurancarboxylate) polymer having a repeating unit of the formula:

,

where n is from 10 to 1,000 and the content of poly(trimethylenefurancarboxylate) is from 0.1 to 99.9 % of the total weight of the polymer composition; or ii) a copolymer containing units derived from 2,5-furandicarboxylate, 1,3-propanediol and terephthalate, wherein the weight percentage of repeating units of PTF in the copolymer is 0.1 to 99.9 % of the total weight of the copolymer; or iii) a polymer mixture containing a) poly(trimethylenefurancarboxylate) as defined above, and poly(alkyleneterephthalate), wherein the polymer mixture contains 0.1–99.9 % by weight of poly(trimethylenefurandicarboxylate) based on the total weight of the polymer mixture, or b) a polymer mixture containing poly (trimethylenefurancarboxylate), as defined above, and poly(alkylenefurandicarboxylate), and where the polymer mixture contains 0.1–99.9 % by weight of poly(trimethylenefurandicarboxylate) based on the total weight of the polymer mixture, and wherein the poly(alkylenefurandicarboxylate) is not poly(trimethylenefurandicarboxylate); where the polymer provides improved gas barrier properties of the substrate compared to a substrate made from freshly prepared poly(ethylene terephthalate) (PET), expressed as

where G_PTF is the measured gas barrier value for PTF and G_PET is the measured gas barrier value for PET, where the barrier properties with respect to oxygen, carbon dioxide or moisture are measured in accordance with ASTM D3985-05, ASTM F2476-05, ASTM F1249-06, respectively, where the oxygen improvement is 2–99 %, the improvement with respect to carbon dioxide is 11–99 % and the improvement in moisture is 3–99 %.

EFFECT: technical result is obtaining a composition for improving the gas barrier properties of an article with respect to oxygen, carbon dioxide and moisture.

17 cl, 4 dwg, 9 ex, 11 tbl