Thermally stable, fluorine-containing organsilanes
AssigneeE. I. Du Pont de Nemours and Company
InventorDavid P. Higley
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Abstract
A class of organosilanes of the general formula ##STR1## wherein Ar is a divalent aromatic radical; R.sub.f is a defined fluoroalkyl or perfluoroalkyl ether group; X is methyl, R.sub.f Ar as defined above, a halogen other than fluorine, or an alkoxy group; and each one of Y and Z is a halogen other than fluorine or an alkoxy group. These organosilanes are very useful as precursors to polysiloxane coupling agents for bonding fluoropolymers to glass fibers which can withstand the usual fluoropolymer melt-processing temperatures without decomposition.
Claims9
An organosilane having the following formula (1):
- ##STR4## where R.sub.f has at most 18 carbon atoms and is selected from the group consisting of
- (a) perfluoroalkyl groups having at least 4 carbon atoms
- (b) --[CF.sub.2 CF(CF.sub.3)O].sub.n --CF.sub.2 --CF.sub.2 --CF.sub.3, where n is an integer of at least 1;
- (c) --CF.sub.2 --(CF.sub.2 --O)m--CF.sub.3, where m is an integer of at least 2;
- and
- (d) --CH.sub.2 --C(CF.sub.3).sub.2 --CF.sub.2 --CF.sub.2 --CF.sub.3 ;
- Ar is a divalent aromatic radical;
- X is selected from the group consisting of
- (e) methyl;
- (f) R.sub.f --Ar as defined above;
- (g) halogen atoms selected from the group consisting of chlorine, bromine, and iodine;
- and
- (h) alkoxy groups;
- and
- each of Y and Z independently is selected from the group consisting of
- (i) halogen atoms selected from the group consisting of chlorine, bromine, and iodine;
- and
- (j) alkoxy groups.
An organosilane wherein at least one of X, Y, and Z is an alkoxy group.
Dependencies are inferred from the claim text.