FLUOROELASTOMERS Russian patent published in 2010 - IPC C08F14/00 C08F14/18 C08F14/22 C08F14/26 C08F16/00 C08F16/12 C08F16/24 

FIELD: chemistry.

SUBSTANCE: hardened fluoroelastomers, based on vinylidene fluoride VDF, having Tg below -35°C and amount of terminal -COF groups less than 0.05 mmol/kg. The fluoroelastomers contain: (A) from 1% to 99% monomer of formula CF₂=CFOCF₂OCF₃ and (B) from 1% to 99% one or more perfluorinated comonomers having at least one ethylene-type unsaturation. The said one or more comonomers (B) contain vinylidene fluoride (VDF) in amount ranging from 1% to 85% of total number moles of monomers.

EFFECT: articles made from fluoroelastomers have improved combination of mechanical properties and residual deformation during compression in wide range of low and high temperatures.

5 cl, 15 ex, 1 tbl