Patent US3773698A successfully refreshed from Google Patents.
US3773698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized melt-processable ethylene/chlorotrifluoroethylene copolymer compositions
Assignee: Solvay Solexis Inc
•
Filing: 1971-03-16
•
Granted: 1973-11-20
•
Expires: 1991-03-16
Abstract
Abstract About equimolar ethylene/chlorotrifluoroethylene copolymer compositions are stabilized against thermal degradation so as to render them melt-processable by incorporating therein a fourcomponent stabilizing system comprising (a) a phosphite of an organic polyhydric phenol; (b) a salt of a carboxylic acid and a metal of Group II of the Periodic Table; (c) a thio dipropionic acid ester or alkali metal salt; and (d) an alkaline earth metal oxide.
Inventors
- 👤 G Khattab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:21
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/5398; C08K5/0091; C08K5/04; C08K5/09; C08K5/098; C08K5/36; C08K5/38; C09; C09D; C09D127/00; C09D127/02; C09D127/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
14 words
The composition of claim 1 wherein the copolymer is an about equimolar ethylene/chlorotrifluoroethylene copolymer.
Claim 2
Dependent Claim
49 words
The composition of claim 1 wherein the transesterified reaction product is obtained from an organic phosphite having the formula (Ra)3P wherein a is selected from the group consisting of oxygen, sulfur and mixtures thereof, and R is selected from the group consisting of aryl, alkyl, cycloalkyl, aryl-alkyL and alkyl-aryl.
Claim 3
Dependent Claim
14 words
The composition of claim 3 wherein the copolymer is an about equimolar ethylene/chlorotrifluoroethylene copolymer.
Claim 4
Dependent Claim
16 words
The composition of claim 1 wherein the salt of a monocarboxylic acid is a zinc salt.
Claim 5
Dependent Claim
16 words
The composition of claim 3 wherein the salt of a monocarboxylic acid is a zinc salt.
Claim 6
Dependent Claim
13 words
The composition of claim 6 wherein the copolymer is an about equimolar ethylene/chlorotrifluoroethylene
Claim 7
Dependent Claim
17 words
The composition of claim 7 wherein the transesterified reaction product is a phosphite of 4,4''-n-butyl-idene-bis(6-tert.-butyl-m-cresol) or 1,1,3-tris(2-methyl-4-hydroxyl-5-tert.butylphenyl)butane.
Claim 8
Dependent Claim
36 words
The composition of claim 1 wherein the transesterified reaction product is a phosphite of 4,4''-n-butyl-idene-bis-(6-tert.butyl-m-cresol) or 1,1,3-tris(2-methyl-4-hydroxy-5-tert.-butylphenyl)butane, wherein the salt of a monocarboxylic acid is zinc-2-ethylhexylate, and wherein the ester of thiodipropionic acid is distearyl thiodipropionate.
Claim 9
Dependent Claim
14 words
The composition of claim 9 wherein the copolymer is an about equimolar ethylene/chlorotrifluoroethylene copolymer.
Claim 10
Dependent Claim
46 words
The composition of claim 1 containing 0.05 to 6 percent by weight of the polymer of a phosphite of 4,4''-n-butylidene-bis(6-tert.-butyl-m-cresol) or 1,1,3-tris(2-methyl-4-hydroxyl-5-tert.-butylphenyl)butane, 0.01 to 3 percent by weight of the polymer of zinc-2-ethylhexylate, and 0.05 to 3 percent by weight of the polymer of distearyl dithiodipropionate.
Claim 11
Dependent Claim
14 words
The composition of claim 11 wherein the copolymer is an about equimolar ethylene/chlorotrifluoroethylene copolymer.
Claim 12
Dependent Claim
57 words
A copolymer composition according to claim 1 containing 0.1 to 1 percent by weight of the polymer of phosphite of 4,4''-n-butylidene-bis-(6-tert.-butyl-m-cresol), 0.02 to 0.5 percent by weight of the polymer of zinc-2-ethyl-hexylate, 0.1 to 1 percent by weight of the polymer of distearyl dithiodipropionate, and 0.1 to 1 percent by weight of the polymer of calcium oxide.
Claim 13
Dependent Claim
14 words
The composition of claim 13 wherein the copolymer is an about equimolar ethylene/chlorotrifluoroethylene copolymer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |