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US 4,833,227 AGranted
Epoxy resins prepared from perfluoroalkylene telomers
AssigneeAusimont S.p.A.
InventorsALberto Re, Mario Alfieri
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Abstract
Fluorinated polymers having epoxy resin structure, containing at least 10% by weight, preferably 20% by weight, of fluorine, prepared starting from epichlorohydrin and from one or more diols, at least one of which is a perfluoroalkylene diol, and by using conventional cross-linking agents for epoxy resins, such as anhydrides of dicarboxylic acids, di- or tri-isocyanates, polyfunctional amines.
Claims2
Fluorinated epoxy resins, containing at least 10% by weight of fluorine and characterized by the structural units represented by the following formula:
- ##STR11## wherein:
- x=an integer from 0 to 20,
- y=an integer from 1 to 20,
- B, B', equal to or different from each other, are H or ##STR12## A=a radical of a fluorinated or non-fluorinated diol, containing one or more aromatic or cycloaliphatic or polycyclic rings,
- R.sub.f =a perfluoroalkylene radical of formula:
- --(CH.sub.2).sub.q --(CF.sub.2 CF.sub.2).sub.n --(CH.sub.2).sub.q --
- wherein
- n is an integer from 2 to 8 and
- q=1 or 2, or of formula:
- ##STR13## wherein p and m are integers from 1 to 8, 9=1 or 2, and X is a perfluoroalkyl group having from 1 to 3 carbon atoms or a halogen other than F,
- D=A or R.sub.f.
8 more elements
Dependencies are inferred from the claim text.