US4038244A
Expired / Lapsed
US
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Fluorocarbon polymer
Assignee: Imperial Chemical Industries Ltd
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Filing: 1974-02-27
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Granted: 1977-07-26
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Expires: 1994-02-27
Abstract
Abstract Filled coagulated dispersion fluorocarbon polymers are made by coagulating the filler and the polymer together after treating the filler with a tetrafluoroethylene oligomer derivative.
Inventors
- 👤 Keith Ogden
- 👤 John Quinby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:26
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08K; C08K9/00; C08K9/04; C08J2327/00; C08J2327/02; C08J2327/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
A method of producing a filled coagulated dispersion form of a fluorocarbon polymer which method comprises a. treating a filler with a hydrophobising agent which is an anionic surface active agent of the formula: ##STR11## where R f 4 is a perfluorocarbon group derived from a TFE oligomer, X is a an anionic group and K is a cationic group, b. adding the treated filler to an aqueous dispersion of the fluorocarbon polymer, and c. coagulating the polymer and filler together.
Claim 2
Independent Claim
81 words
A method of producing a filled coagulated dispersion form of a fluorocarbon polymer which method comprises a. treating a filler with a hydrophobising agent which is an anionic surface active agent of the formula: ##STR11## where R f 4 is a perfluorocarbon group derived from a TFE oligomer, X is a an anionic group and K is a cationic group, b. adding the treated filler to an aqueous dispersion of the fluorocarbon polymer, and c. coagulating the polymer and filler together.
Claim 3
Dependent Claim
34 words
A method according to claim 1 in which XK represents ##STR12## where R 2 is hydrogen or an alkyl group with 1 to 5 carbon atoms and M is H, alkali metal or ammonium.
Claim 4
Dependent Claim
37 words
A method according to claim 2 in which R f 4 in the formula of the hydrophobising agent represents a group of the formula C n F 2n -1 where n = 8 or 10 or 12.
Claim 5
Independent Claim
50 words
A method of producing a filled coagulated dispersion form of a fluorocarbon polymer which method comprises: An aniones treating the filler with a hydrophobising agent of the formula ##STR13## b. adding the treated filler to an aqueous dispersion of the fluorocarbon polymer, and c. coagulating the polymer and filler together.
Claim 6
Independent Claim
50 words
A method of producing a filled coagulated dispersion form of a fluorocarbon polymer which method comprises: An aniones treating the filler with a hydrophobising agent of the formula ##STR13## b. adding the treated filler to an aqueous dispersion of the fluorocarbon polymer, and c. coagulating the polymer and filler together.
Claim 7
Dependent Claim
23 words
A method acording to claim 1 wherein the filler is selected from aluminum, bronze, copper, nickel, iron, asbestos, mica, silica, talc and glass.
Claim 8
Dependent Claim
72 words
A filled coagulated dispersion form of a fluorocarbon polymer comprising in intimate admixture particles of the fluorocarbon polymer and particles of filler, the filler particles being coated with an anionic fluorocarbon derivative of the formula: ##STR14## wherein XK is selected from ##STR15## where R 2 is hydrogen or an alkyl group with 1 to 5 carbon atoms and M is H, alkali metal or ammonium, and n is 8, 10 or 12.
Claim 9
Dependent Claim
72 words
A filled coagulated dispersion form of a fluorocarbon polymer comprising in intimate admixture particles of the fluorocarbon polymer and particles of filler, the filler particles being coated with an anionic fluorocarbon derivative of the formula: ##STR14## wherein XK is selected from ##STR15## where R 2 is hydrogen or an alkyl group with 1 to 5 carbon atoms and M is H, alkali metal or ammonium, and n is 8, 10 or 12.
Claim 10
Dependent Claim
14 words
A filled polymer according to claim 6 wherein the filler is bronze or glass.
References Cited (Backward Citations)
US3880798A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |