METHOD OF MANUFACTURING POROUS FILM FROM POLY(α, α, α', α'-TETRAFLUORO-P-XYLYLENE), AND POROUS FILM Russian patent published in 2006 - IPC C08G61/02 C08J5/18 

FIELD: polymer materials.

SUBSTANCE: method is implemented via consecutively effecting sublimation and pyrolysis of cyclic dimer 1,1,2,2,9,9,10,10-octafluori[2.2]paracyclophane in three-zone reactor, including sublimation zone, pyrolysis zone, and condensation zone, at residual pressure 0.001 to 0.1 mm Hg to form α,α,α',α'-tetrafluoro-p-xylylene, which is the subjected to condensation and supported polymerization at temperature from -40°C to +25°C to form film followed by heat processing thereof into porous film. According to invention, sublimation is carried out at 30 to 260°C, pyrolysis at 450-650°C, and heat processing is effected in two steps: first at 30-260°C for 10-1440 min until content of residual cyclic dimer achieves 3.0-5.0% of the mass of film and then at 430-480°C for 15-120 min until content of residual cyclic dimer drops below 0.05% of the mass of film. Process is conducted at flow velocity of cyclic dimer from sublimation zone to pyrolysis zone ranging from 0.005 to 10 g/min and film formation rate upon polymerization between 0.22 and 0.88 μm/min.

EFFECT: optimized process parameters.

3 cl, 6 ex