US5180845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally stable, fluorine-containing organsilanes
Assignee: EIDP Inc
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Filing: 1992-04-07
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Granted: 1993-01-19
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Expires: 2012-04-07
Abstract
Abstract A class of organosilanes of the general formula ##STR1## wherein Ar is a divalent aromatic radical; R f is a defined fluoroalkyl or perfluoroalkyl ether group; X is methyl, R 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.
Inventors
- 👤 David P. Higley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:07
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/12; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/40; C07F7/18; C07F7/1804; C09; C09D; C09D183/00; C09D183/04; C09D183/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2962; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
160 words
An organosilane having the following formula (1): ##STR4## where R 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 2 CF(CF 3 )O] n --CF 2 --CF 2 --CF 3 , where n is an integer of at least 1; (c) --CF 2 --(CF 2 --O)m--CF 3 , where m is an integer of at least 2; and (d) --CH 2 --C(CF 3 ) 2 --CF 2 --CF 2 --CF 3 ; Ar is a divalent aromatic radical; X is selected from the group consisting of (e) methyl; (f) R 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.
Claim 2
Dependent Claim
160 words
An organosilane having the following formula (1): ##STR4## where R 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 2 CF(CF 3 )O] n --CF 2 --CF 2 --CF 3 , where n is an integer of at least 1; (c) --CF 2 --(CF 2 --O)m--CF 3 , where m is an integer of at least 2; and (d) --CH 2 --C(CF 3 ) 2 --CF 2 --CF 2 --CF 3 ; Ar is a divalent aromatic radical; X is selected from the group consisting of (e) methyl; (f) R 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.
Claim 3
Dependent Claim
44 words
An organosilane of claim 1 wherein the divalent aromatic radical Ar in formula (1) is a radical remaining when two ring hydrogen atoms are removed from an aromatic compound selected from the group consisting of benzene, naphthalene, toluene, xylene, anthracene, furan, pyrrole, and pyridine.
Claim 4
Dependent Claim
18 words
An organosilane of claim 1 wherein R f is a perfluoroalkyl group having more than four carbon atoms.
Claim 5
Dependent Claim
15 words
An organosilane wherein at least one of X, Y, and Z is an alkoxy group.
Claim 6
Dependent Claim
15 words
An organosilane wherein at least one of X, Y, and Z is an alkoxy group.
Claim 7
Dependent Claim
15 words
An organosilane of claim 4 wherein each alkoxy group has at most four carbon atoms.
Claim 8
Dependent Claim
19 words
An organosilane of claim 5 wherein each alkoxy group is selected from the group consisting of methoxy and ethoxy.
Claim 9
Dependent Claim
16 words
An organosilane of claim 1 wherein the R f group has at least 6 carbon atoms.
Claim 10
Dependent Claim
17 words
A glass fiber coated with a polysiloxane made by the hydrolysis of an organosilane of claim 1.
Claim 11
Dependent Claim
17 words
A glass fiber coated with a polysiloxane obtained by the hydrolysis of an organosilane of claim 6.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-01-19 | 1996-07-20 | 1997-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-19 | 2000-07-20 | 2001-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-19 | 2004-07-20 | 2005-01-19 | $7700.00 | Window Closed / Lapsed |