US3903045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized, melt processable 3,3,3-trifluoro-2-trifluoromethyl propene/vinylidene fluoride copolymer compositions
Assignee: Solvay Solexis Inc
•
Filing: 1973-12-12
•
Granted: 1975-09-02
•
Expires: 1993-12-12
Abstract
Abstract Stabilized, melt-processable compositions are provided which comprise a copolymer of 3,3,3-trifluoro-2-trifluoromethyl propene and vinylidene fluoride and an effective amount of a stabilizing agent selected from the group consisting of the oxides and salts of divalent metals and mixtures thereof. Such divalent metals include the metals of Group II of the Periodic Table and lead, tin and manganese. In general, the stabilizer is present in an amount of at least about 0.20 weight percent of the copolymer.
Inventors
- 👤 Swayambu Chandrasekaran
- 👤 Dulari L Sawhney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:55
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K3/00; C08K3/01; C08K3/014; C08K3/10; C08K3/18; C08K3/20; C08K3/22; C08K3/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
69 words
A STABILIZED MELT PROCESSABLE COPOLYMER COMPOSITION COMPRISING A COPOLYMER OF 3,3,3 TRIFLUORO-2-TRIFLUOROEMETHYL PROPENE AND VINYLIDENE FLUORIDE CONTAINING FROM ABOUT 1 TO ABOUT 55 MOL PERCENT OF 3,33,-TRIFLUORO-2-TRIFLUOROMETHYL PROPENE AND CORRESPONDINGLY FROM ABOUT 99 TO ABOUT 45 MOL PERCENT OF VINYLIDENE FLUORIDE AND AN EFFECTIVE AMOUNT OF A THERMAL STABILIZER SELECTED FROM THE GROUP CONSISTING OF OXIDES SULFATES CARBONATES PHOSPHATES, ACETATES BORATES AND ALUMINATES OF DIVALENT METALS AND MIXTURES THEREOF.
Claim 2
Dependent Claim
69 words
A STABILIZED MELT PROCESSABLE COPOLYMER COMPOSITION COMPRISING A COPOLYMER OF 3,3,3 TRIFLUORO-2-TRIFLUOROEMETHYL PROPENE AND VINYLIDENE FLUORIDE CONTAINING FROM ABOUT 1 TO ABOUT 55 MOL PERCENT OF 3,33,-TRIFLUORO-2-TRIFLUOROMETHYL PROPENE AND CORRESPONDINGLY FROM ABOUT 99 TO ABOUT 45 MOL PERCENT OF VINYLIDENE FLUORIDE AND AN EFFECTIVE AMOUNT OF A THERMAL STABILIZER SELECTED FROM THE GROUP CONSISTING OF OXIDES SULFATES CARBONATES PHOSPHATES, ACETATES BORATES AND ALUMINATES OF DIVALENT METALS AND MIXTURES THEREOF.
Claim 3
Dependent Claim
24 words
The composition of claim 1 wherein the stabilizer is present in an amount of at least about 0.2 percent by weight of the copolymer.
Claim 4
Dependent Claim
33 words
The composition of claim 1 wherein the copolymer contains from about 10 to about 52 mol percent of 3,3,3-trifluoro-2-trifluoromethyl propene and correspondingly from about 90 to about 48 mol percent of vinylidene fluoride.
Claim 5
Dependent Claim
30 words
The composition of claim 1 wherein said stabilizer is selected from the group consisting of oxides and sulfates of a metal of Group II of the Periodic Table or lead.
Claim 6
Dependent Claim
30 words
The composition of claim 4 wherein said stabilizer is selected from the group consisting of magnesium oxide, calcium oxide, barium oxide, zinc oxide, cadmium oxide, lead oxide and calcium sulfate.
Claim 7
Dependent Claim
20 words
The composition of claim 5 wherein said stabilizer is selected from the group consisting of calcium oxide and zinc oxide.
Claim 8
Dependent Claim
24 words
The composition of claim 1 wherein said stabilizer is present in an amount of about 1 to 3 percent by weight of the copolymer.
Claim 9
Dependent Claim
33 words
The composition of claim 1 wherein the copolymer contains from about 40 to about 51 mol percent of 3,3,3-trifluoro-2-trifluoromethyl propene and correspondingly from about 60 to about 49 mol percent of vinylidene fluoride.
Claim 10
Dependent Claim
37 words
The composition of claim 8 wherein said stabilizer is selected from the group consisting of calcium oxide and zinc oxide and is present in an amount of about 1 to 3 percent by weight of the copolymer.
Claim 11
Dependent Claim
28 words
The Composition of claim 1 wherein said divalent metals are selected from the group consisting of metals of Group II of the Periodic Table, lead, tin and manganese.
References Cited (Backward Citations)
US1932889A
Cited
US2075251A
Cited
US2218645A
Cited
US2406837A
Cited
US2629700A
Cited
US2855266A
Cited
US3320206A
Cited
US3773698A
Cited
US3712877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |