US4123602A
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US
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Terpolymers of tetrafluoroethylene, ethylene and perfluoroalkyl vinyl monomer and process for producing the same
Assignee: AGC Inc
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Filing: 1978-01-09
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Granted: 1978-10-31
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Expires: 1998-01-09
Abstract
Abstract Copolymers of tetrafluoroethylene and ethylene essentially consist of components of from 40 to 60 mole % of tetrafluoroethylene, 40 to 60 mole % of ethylene and 0.1 to 10 mole % of perfluoroalkyl vinyl component having the formula CH.sub.2 ═ CH--C.sub.n F.sub.2n + 1 wherein n is an integer of 2 to 10. Said copolymer has a volumetric flow rate of 10 to 500 mm 3 /sec. defined in the specification. The copolymers of tetrafluoroethylene and ethylene are produced by copolymerizing tetrafluoroethylene and ethylene with a molar ratio of C 2 F 4 /C 2 H 4 being kept essentially higher than 40/60 in the reactor in the presence of a small amount of a perfluoroalkyl vinyl monomer having the formula CH.sub.2 ═ CH--C.sub.n F.sub.2 + 1 wherein n is an integer of 2 to 10. This is a continuation of application Ser. No. 689.526, filed May 24, 1976, now abandoned.
Inventors
- 👤 Hiroshi Ukihashi
- 👤 Masaaki Yamabe
- 👤 Haruhisa Miyake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:38
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/26; C08F214/265; C08F210/00; C08F210/02
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
78 words
A terpolymer having a volumetric flow rate of 10 to 500 mm 3 /sec. as determined at 300° C under a load of 30 kg/cm 2 containing mainly tetrafluoroethylene and ethylene which consists essentially of components of 40 to 60 mole % of tetrafluoroethylene, 40 to 60 mole % of ethylene and 0.1 to 10 mole % of perfluoroalkyl vinyl monomer having the formula CH.sub.2 ═ CH--C.sub.n F.sub.2n +1 wherein n is an integer of 2 to 10.
Claim 2
Dependent Claim
78 words
A terpolymer having a volumetric flow rate of 10 to 500 mm 3 /sec. as determined at 300° C under a load of 30 kg/cm 2 containing mainly tetrafluoroethylene and ethylene which consists essentially of components of 40 to 60 mole % of tetrafluoroethylene, 40 to 60 mole % of ethylene and 0.1 to 10 mole % of perfluoroalkyl vinyl monomer having the formula CH.sub.2 ═ CH--C.sub.n F.sub.2n +1 wherein n is an integer of 2 to 10.
Claim 3
Dependent Claim
15 words
The terpolymer of claim 1, wherein the perfluoroalkyl vinyl monomer is CH.sub.2 ═ CHC.sub.4 F.sub.9.
Claim 4
Dependent Claim
15 words
The terpolymer of claim 1, wherein the perfluoroalkyl vinyl monomer is CH.sub.2 ═ CHC.sub.5 F.sub.13.
Claim 5
Dependent Claim
19 words
The terpolymer of claim 1, wherein the content of the perfluoroalkyl vinyl monomer is 0.3 to 5 mole %.
Claim 6
Dependent Claim
23 words
The terpolymer of claim 1, wherein the molar ratio of C.sub.2 F.sub.4 to C.sub.2 H.sub.4 is in the range of 45:55 to 55:45.
Claim 7
Dependent Claim
19 words
The terpolymer of claim 5, wherein the molar ratio of C.sub.2 F.sub.4 to C.sub.2 H.sub.4 is higher than 50/50.
Claim 8
Dependent Claim
17 words
The terpolymer of claim 1, wherein the volumetric flow rate is 20 to 300 mm 3 /sec.
Claim 9
Dependent Claim
17 words
The terpolymer of claim 1, wherein the flowing temperature of said terpolymer is higher than 240° C.
Claim 10
Dependent Claim
18 words
The terpolymer of claim 1, wherein the thermal decomposition temperature of said terpolymer is higher than 310° C.
Claim 11
Dependent Claim
34 words
The terpolymer of claim 1, wherein the tensile strength at 200° C of said terpolymer is higher than 30 kg/cm 2 and the elongation at 200° C of said terpolymer is higher than 200%.
Claim 12
Dependent Claim
25 words
The terpolymer of claim 1, wherein the initial strain in a tensile creep test under 30 Kg/cm 2 of said terpolymer is less than 10%.
Claim 13
Dependent Claim
25 words
The terpolymer of claim 11, wherein the initial strain in a tensile creep test under 30 kg/cm 2 of said terpolymer is less than 5%.
Claim 14
Dependent Claim
92 words
A process for producing a terpolymer having a volumetric flow rate of 10 to 500 mm 3 /sec. containing mainly tetrafluoroethylene and ethylene and containing 0.1 to 10 mole % of a perfluoroalkyl vinyl component, which comprises: copolymerizing tetrafluoroethylene, ethylene and a small amount of a perfluoroalkyl vinyl monomer having the formula CH.sub.2 ═ CH--C.sub.n F.sub.2n - 1 wherein n is an integer of 2 to 10, in the presence of a polymerization initiator while maintaining the molar ratio of C 2 F 4 to C 2 H 4 greater than 40/60.
Claim 15
Dependent Claim
92 words
A process for producing a terpolymer having a volumetric flow rate of 10 to 500 mm 3 /sec. containing mainly tetrafluoroethylene and ethylene and containing 0.1 to 10 mole % of a perfluoroalkyl vinyl component, which comprises: copolymerizing tetrafluoroethylene, ethylene and a small amount of a perfluoroalkyl vinyl monomer having the formula CH.sub.2 ═ CH--C.sub.n F.sub.2n - 1 wherein n is an integer of 2 to 10, in the presence of a polymerization initiator while maintaining the molar ratio of C 2 F 4 to C 2 H 4 greater than 40/60.
Claim 16
Dependent Claim
28 words
The process according to claim 13, wherein the molar ratio of C 2 F 4 to C 2 H 4 in a feed mixture is higher than 70/30.
Claim 17
Dependent Claim
28 words
The process according to claim 13, wherein the molar ratio of C 2 F 4 to C 2 H 4 in a feed mixture is higher than 75/25.
Claim 18
Dependent Claim
50 words
The process according to claim 14, wherein the molar ratio is in a range of 70/30 to 90/10, and wherein the monomer mixture of tetrafluoroethylene and ethylene of a molar ratio of C 2 F 4 to C 2 H 4 of 40/60 to 60/40 is fed during the copolymerization.
Claim 19
Dependent Claim
65 words
The process according to claim 15, wherein the molar ratio of C 2 F 4 to C 2 H 4 in an initial feed mixture is in a range of 75/25 to 85/15 and wherein the monomer mixture of tetrafluoroethylene and ethylene of a molar ratio of C 2 F 4 to C 2 H 4 of 45/55 to 55/45 is fed during the copolymerization.
Claim 20
Dependent Claim
21 words
The process according to claim 13, wherein the perfluoroalkyl group of said perfluoroalkyl vinyl monomer has 3 to 8 carbon atoms.
Claim 21
Dependent Claim
20 words
The process according to claim 18, wherein the perfluoroalkyl vinyl monomer is CH 2 ═ CH--C 4 F 9 .
Claim 22
Dependent Claim
20 words
The process according to claim 18, wherein the perfluoroalkyl vinyl monomer is CH 2 ═ CH--C 6 F 13 .
Claim 23
Dependent Claim
35 words
The process according to claim 13, wherein the mole % of the perfluoroalkyl vinyl monomer is kept essentially in the range of from 0.1 to 10 based on the total monomers content throughout the copolymerization.
Claim 24
Dependent Claim
34 words
The process according to claim 13, wherein the mole % of the perfluoroalkyl vinyl monomer is kept essentially the range of from 0.3 to 5 based on the total monomer content throughout the copolymerization.
Claim 25
Dependent Claim
19 words
The process according to claim 13, wherein the copolymerization is conducted in a solvent or saturated fluoro- or chlorofluoro-hydrocarbon.
Claim 26
Dependent Claim
18 words
The process according to claim 13, wherein the copolymerization is conducted in a saturated fluoro- or chlorofluoro-carbon solvent.
Claim 27
Dependent Claim
24 words
The process according to claim 23, wherein 0.05 to 20 mole of the solvent per 1 mole of initially charged total monomers is used.
Claim 28
Dependent Claim
17 words
The process according to claim 23, wherein the copolymerization is conducted at -50° C to 150° C.
Claim 29
Dependent Claim
20 words
The process according to claim 23, wherein copolymerization is conducted under a pressure of 2 to 50 Kg/cm 2 (gauge).
Claim 30
Dependent Claim
14 words
The process according to claim 13, wherein the polymerization initiator is an ionizing radiation.
Claim 31
Dependent Claim
14 words
The process according to claim 13, wherein the polymerization initiator is a radical initiator.
Claim 32
Dependent Claim
14 words
The process according to claim 29, wherein the radical initiator is a peroxy ester.
Claim 33
Dependent Claim
27 words
The process according to claim 29, wherein the radical initiator is added in a ratio of 0.001 to 2 wt. % to the initially charged total monomers.
Claim 34
Dependent Claim
39 words
The process according to claim 13, wherein a peroxy ester radical initiator having the formula ##STR3## wherein R and R' respectively represent an aliphatic alkyl group is used as the polymerization initiator with the saturated fluoro- or chlorofluoro-hydrocarbon solvent.
Claim 35
Dependent Claim
16 words
The process according to claim 32, wherein the copolymerization is conducted at 30+ to 120° C.
Claim 36
Dependent Claim
24 words
The process according to claim 32, wherein 1 to 10 mole of the solvent per 1 mole of initially charged total monomers is used.
References Cited (Backward Citations)
US3445434A
Cited
US3804817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |