C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 43/315 (2006.01) C08G 2/38 (2006.01) C08G 4/00 (2006.01) C08G 16/02 (2006.01) C08G 65/00 (2006.01) C08G 65/324 (2006.01) C08G 65/329 (2006.01) C08G 65/331 (2006.01)
Patent
CA 2095742
NEW FLUORINE-CONTAINING COMPOUNDS HAVING POLYACETALIC STRUCTURE, AND PROCESS FOR PREPARING THEM ABSTRACT 1) New fluorine-containing compounds having polyacetalic structure, of general formula: (I) Image where: Rf = a perfluorooxyalkylene chain having ?n from 500 to 5,000; m = 4 - 25; c = 1 - 10; n = 2 - 100. 2) A process for preparing them, which comprises carrying out the polycondens- ation of diols having formula: (II) HORfOH with formaldehyde, in mass or in the presence of solvents, in an acid medium. The compounds of formula (I) can be oligomeric compounds (polymerization degree ?nfrom 2 to about 20) or polymeric compounds (?nfrom about 20 to about 100). They exhibit a high stability to heat and to chemical agents, and Tg values slight ly different from the ones of the diols utilized for preparing them.
Danusso Ferdinando
Levi Marinella
Strepparola Ezio
Tonelli Claudio
Turri Stefano
Ausimont S.p.a.
Mccarthy Tetrault Llp
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