| abstract |
(57) [Summary] (Revised) [Constitution] Fluoroolefins; carboxylic acid vinyl esters, allyl esters, vinyl ethers or allyl ethers; or (meth) acrylic acid or crotonic acid, etc., Such as other comonomers that are copolymerizable with the above fluoroolefins, After the completion of the polymerization reaction, these unreacted fluoroolefins, which essentially require fluoroolefins, In each case, as the first stage, the pressure in the reaction vessel transfers the gas to the gas collection tank, and as the second stage, Dissolved unreacted fluoroolefins are transferred to a gas collection tank and condensed and liquefied. [Effect] Unreacted fluoroolefins can be recovered without destroying the particle morphology. |