| 主权项 |
1. A method of making a highly fluorinated polymer comprising:
(i) polymerizing one or more perfluorinated monomers in an aqueous emulsion polymerization in the presence of a polymerizable fluorinated emulsifier to form the highly fluorinated polymer, wherein the polymerizable fluorinated emulsifier having the formula:
X2C═CX(CF2)m(CH2)n[O—(CX2)p]q[O—(CX2)r]s—O—(CX2—CX2)t—[(O)w—(CX2)u]v—[CH2]z—Ywhere X is independently selected from H, F, or CF3; Y is COOM or SO3M where M is H, an alkali metal or NH4; m is 0 to 5, n is 0 to 5, p is at least 1, q is 0 to 5, r is 0 to 5, s is 0 to 5, t is 0-5, u is 0 to 5, v is 0 to 5, w is 0 or 1, and z is 0 to 5; wherein at least one of m, n, q, s, t, u, v, and z is at least 1; wherein the polymerizable fluorinated emulsifier (a) comprises at least 1 fluorine atom; (b) is substantially free of telogenic activity, and (c) is less than 1 wt % based on the total weight of monomers used;
(ii) isolating the highly fluorinated polymer; and (ii) post-fluorinating the isolated highly fluorinated polymer. |
