Preparation Method for Polytrifluorostyrene
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United States of America Patent
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Issued Date -
Oct 24, 2024
app pub date -
Oct 26, 2021
filing date -
Oct 26, 2021
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Abstract
Disclosed is a preparation method for a polytrifluorostyrene. The method comprises: (i) providing a pre-emulsion of a trifluorostyrene monomer and a non-perfluorinated fluorine-containing anionic surfactant, wherein based on the weight of the trifluorostyrene monomer, the amount of the non-perfluorinated fluorine-containing anionic surfactant in the emulsion is 0.1-5 wt %, the non-perfluorinated fluorine-containing anionic surfactant has the general formula: CF3(CFX)n-(CH2)m-(C6H4)o-M, where n is an integer of 1-7, m is an integer of 1-4, and o is an integer of 0-2; X is selected from —F, —CF3, —OCF3, and —FCF2C(CF3)2; and M is selected from a carboxyl group, a sulfo group or respective salts thereof; (ii) adding an initiator to initiate a microemulsion polymerization reaction of the trifluorostyrene monomer; and (iii) adding a coagulant for demulsification.
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