NEW FLUORINATED POLYMERS WITH IMPROVED INDICES Russian patent published in 2006 - IPC C08F214/26 C08J5/00 B32B27/28 

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to a fluorinated polymer comprising polymeric fragments forming as result of polymerization of a monomeric mixture. The monomeric mixture comprises the following components: (i) from above 30 to 85 wt.-% of tetrafluoroethylene; (ii) from 5 to 30 wt.-% vinylidene fluoride; (iii) from above 14 to 50 wt.-% of at least one unsaturated monomer of ethylene type of the general formula: CF₂=CFR_f wherein R_f represents perfluoroalkyl group comprising from 1 to 8 carbon atoms, and (iv) from 0.1 to 15 wt.-% of perfluorinated ester of the general formula: CF₂=CF-(OCF₂CF(R_f)_aOR'_f wherein R_f is the same group as in (iii); R'_f means perfluoroaliphatic group comprising from 1 to 8 carbon atoms and wherein value "a" has value from 0 to 3. Also, invention relates to a multilayer article, composition, a method for improving polymer flexibility and hardening composition. Invention provides preparing polymers possessing the excellent flexibility and good penetration indices.

EFFECT: improved and valuable properties of polymers.

19 cl, 14 tbl, 12 ex