Patent ID: 8969432
Filing Date: 2015-03-03
Classification: C08F,C08J,C08L

Abstract:
1. Modified polytetrafluoroethylene particles, each comprising a core-shell structure that includes a particle core and a particle shell, the particle core comprising repeating units of tetrafluoroethylene and a comonomer (a), the particle shell comprising repeating units of tetrafluoroethylene and a comonomer (b), the comonomer (a) being a (perfluoroalkyl)ethylene represented by the following formula (I): wherein Rf represents a C the comonomer (b) being at least one monomer selected from the group consisting of 1,1,3,3,3-pentafluoro-1-propylene and 1,2,3,3,3-pentafluoro-1-propylene, wherein the repeating units of the comonomers (b) in the particle shells constitute 0.001 to less than 0.050 wt % of the total amount of the particles.