Patent US4133798A successfully refreshed from Google Patents.
US4133798A
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Fluorocopolymer composition having improved transparency
Assignee: AGC Inc
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Filing: 1978-01-13
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Granted: 1979-01-09
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Expires: 1998-01-13
Abstract
Abstract Transparency of an ethylene-tetrafluoroethylene type copolymer is improved by an addition of at least one condensed ring compound selected from the group consisting of anthracenes, phenanthrenes, anthraquinones phenanthrenequinones and substituted derivatives thereof.
Inventors
- 👤 Hiromichi Nishimura
- 👤 Masahiko Ichimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:26
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/01; C08K5/04; C08K5/07; C08K5/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
43 words
A fluorocopolymer composition having improved transparency and high ultraviolet absorbancy, which comprises 100 wt. parts of a fluorocopolymer having a tetrafluoroethylene component and an ethylene component in a molar ratio of C 2 F 4 /C 2 H 4 of 60:40 to 40:60;
Claim 2
Dependent Claim
43 words
A fluorocopolymer composition having improved transparency and high ultraviolet absorbancy, which comprises 100 wt. parts of a fluorocopolymer having a tetrafluoroethylene component and an ethylene component in a molar ratio of C 2 F 4 /C 2 H 4 of 60:40 to 40:60;
Claim 3
Dependent Claim
80 words
05 to 20 wt. parts of a condensed ring compound selected from the group consisting of anthracenes, phenanthrenes, anthraquinones, phenanthrenequinones, substituted derivatives thereof and mixtures thereof; and optionally up to 30 mole percent of another comonomer component; wherein the heat melt temperature of said fluorocopolymer is 260° to 360° C.; and wherein said condensed ring compound has a boiling point higher than 250° C., is not decomposed at the fabrication temperature of said fluorocopolymer and is miscible with said fluorocopolymer.
Claim 4
Dependent Claim
80 words
05 to 20 wt. parts of a condensed ring compound selected from the group consisting of anthracenes, phenanthrenes, anthraquinones, phenanthrenequinones, substituted derivatives thereof and mixtures thereof; and optionally up to 30 mole percent of another comonomer component; wherein the heat melt temperature of said fluorocopolymer is 260° to 360° C.; and wherein said condensed ring compound has a boiling point higher than 250° C., is not decomposed at the fabrication temperature of said fluorocopolymer and is miscible with said fluorocopolymer.
Claim 5
Dependent Claim
15 words
A fluorocopolymer composition according to claim 1 wherein the condensed ring compound has no substituent.
Claim 6
Dependent Claim
16 words
A fluorocopolymer composition according to claim 1 wherein the condensed ring compound is anthracene or phenanthrene.
Claim 7
Dependent Claim
14 words
A fluorocopolymer composition according to claim 1 wherein the condensed ring compound is anthraquinone.
Claim 8
Dependent Claim
23 words
A fluorocopolymer composition according to claim 1 wherein the fluorocopolymer has a volumetric melt flow rate of 10 to 300 m 3 /second.
Claim 9
Dependent Claim
21 words
A fluorocopolymer composition according to claim 1 wherein the amount of the condensed ring compound is 0.5 to 5 wt. parts.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |