Patent ID: 11898006
Assignee: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 13:
14. The method according to claim 11, wherein any compounds of formula (IX) HOOC—RF—[—CF2—O—CF2CF2—(CRf1Rf2)a—O—Rf—O—(CRf1Rf2)b—CF2CF2—O—CF2—RF]n′″—F of mixture (PFFCOOH—CF3) is modified into a compound of formula A—RF—[—CF2—O—CF2CF2—(CRf1Rf2)a—O—Rf—O—(CRf1Rf2)b—CF2CF2—O—CF2—RF]n′″—F, wherein RF, Rf, Rf1, Rf2, n′″, a and b have the meaning defined above, and A is a group of formula —XaYZb, wherein:
X a polyvalent, selected from the group consisting of —CONR—, —COO—, —COS—, —CO—, and groups of any of formulae:, , a is zero or one;
b is an integer of 1-3;
R is hydrogen, aryl of less than 13 carbon atoms or —YZb radical;
Y is a bond or a polyvalent linking organic radicals free of olefinic unsaturation such as alkylene (e.g., —CH2—, —C2H4—), oxa-alkylene (e.g., —CH2OCH2—), cycloalkylene, thia-alkylene, arylene, or combinations thereof, such as aralkylene and alkarylene;
Z is a functional groups which can undergo electrophilic, nucleophilic, or free radical reaction, and which are optionally selected from the group consisting of —OH, —SH, —SR′, —NR2′, —CO2H, —SiR′dQ3-d, —CN, —NCO, >C═C<, —CO2R′, —OSO2CF3, —OCOCI, —OCN, —N(R′)CN, —(O)COC(O)—, —N═C, —I, —CHO, —CH(OCH3)2, —SO2CI, —C(OCH3)═NH, —C(NH2)═NH, —C6H4OC6H4—Q, —OCR1R2Rf,, , wherein R′ is hydrogen, aryl, or a C1-C6 alkyl; Q is halogen, —OR′, —OCOR′, or —CH═CH2; and d is or an integer of 1 to 3; R1 is hydrogen, or a C1-C6 (fluoro)alkyl, R2 is hydrogen, or a C1-C6 alkyl; and Rf is a C1-C6 (fluoro)alkyl.