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US3884885A
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Melt processing of fluorinated polymers
Assignee: EIDP Inc
•
Filing: 1973-08-01
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Granted: 1975-05-20
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Expires: 1993-08-01
Abstract
Abstract A fluorinated polymer which contains pendant groups in the form of -SO3H, salt thereof, or salt of -SO2NH2 is converted to a polymer whose surface is melt processable. Conversion of the polymer is obtained by treatment with a tertiary amine, quaternary ammonium base, or the salt of the amine or base.
Inventors
- 👤 Walther Gustav Grot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:20
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08F; C08F8/00; C08J5/2206; C08J5/2218; C08J5/2231; C08J5/2237; C08J2327/00; C08J2327/02; C08J2327/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
37 words
A METHOD FOR TREATING A FLUORINATED POLYMER WHICH DEGRADES PRIOR TO MELTING SAID POLYMER CONTAINING PENDANT SIDE CHANS WITH SULFONYL GROUPS WHICH ARE ATTACHED TO CARBON AOMS WHICH HAVE AT LEAST ONE FLUORINE ATOM ATTACHED THERETO, ATOM
Claim 2
Independent Claim
37 words
A METHOD FOR TREATING A FLUORINATED POLYMER WHICH DEGRADES PRIOR TO MELTING SAID POLYMER CONTAINING PENDANT SIDE CHANS WITH SULFONYL GROUPS WHICH ARE ATTACHED TO CARBON AOMS WHICH HAVE AT LEAST ONE FLUORINE ATOM ATTACHED THERETO, ATOM
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein the tertiary amine, the amine component of the salt, or quaternary ammonium ion has a molecular weight below 500.
Claim 4
Dependent Claim
12 words
The method of claim 2 wherein said molecular weight is above 100.
Claim 5
Dependent Claim
24 words
The method of claim 2 wherein said tertiary amine or the salt thereof has an ionization constant greater than 10 6 in aqueous solution.
Claim 6
Dependent Claim
19 words
The method of claim 2 wherein said tertiary amine or the salt thereof has a decomposition temperature above 250*C.
Claim 7
Dependent Claim
24 words
The method of claim 5 wherein said tertiary amine or the salt thereof has an ionization constant greater than 10 6 in aqueous solution.
Claim 8
Dependent Claim
19 words
The method of claim 2 wherein the pendant side chain is in the form of the salt of -SO2NH2.
Claim 9
Dependent Claim
19 words
The method of claim 2 wherein the pendant side chain is in the form of -SO3H or salt thereof.
Claim 10
Dependent Claim
25 words
The method of claim 8 wherein the pendant side chain is in the form of -SO3Y with Y an alkali metal or alkaline earth metal.
Claim 11
Dependent Claim
11 words
The method of claim 9 wherein Y is an alkali metal.
Claim 12
Dependent Claim
9 words
The method of claim 10 wherein Y is sodium.
Claim 13
Dependent Claim
9 words
The method of claim 10 wherein Y is potassium.
Claim 14
Dependent Claim
15 words
The method of claim 2 wherein said melt processing is at a temperature below 300*C.
Claim 15
Dependent Claim
16 words
The method of claim 2 wherein said melt processing comprises joining two sections of contacted polymer.
Claim 16
Dependent Claim
14 words
The method of claim 2 wherein said melt processing comprises extruding the contacted polymer.
Claim 17
Dependent Claim
23 words
The method of claim 2 wherein the contacted polymer after melt processing is converted to a fluorinated polymer which degrades prior to melting.
Claim 18
Dependent Claim
12 words
The method of claim 16 wherein said conversion is by ion exchange.
Claim 19
Dependent Claim
25 words
The method of claim 2 wherein a solvent is employed for the tertiary amine, quaternary ammonium base or the salt of said amine or base.
Claim 20
Dependent Claim
15 words
The method of claim 2 wherein a quaternary ammonium base or salt thereof is employed.
References Cited (Backward Citations)
US3236881A
Cited
US3041317A
Cited
US3220984A
Cited
US3392096A
Cited
US3282875A
Cited
US3501432A
Cited
US3632685A
Cited
US3560568A
Cited
US3718627A
Cited
US3784399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |