EP0073087A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Amorphous copolymers of perfluoro-2,2-dimethyl-1,3-dioxole
Assignee: EIDP Inc
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Filing: 1982-08-19
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Granted: —
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Expires: 2002-08-19
Abstract
Abstract Amorphous copolymers of perfluoro-2,2-dimethyl-1,3-dioxole with tetrafluoroethylene and, optionally, with another ethylenically unsaturated monomer, have high glass transition temperatures, e.g., 85°C or higher, low indices of refraction, and good physical properties which make them suitable for high-temperature, high-transparency applications.
Inventors
- 👤 Edward Noonan Squire
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 12:59
CPC Classifications
C; C08; C08F; C08F16/00; C08F16/12; C08F16/14; C08F16/24; C08F234/00; C08F234/02; G; G02; G02B; G02B6/00; G02B6/10; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/034; H05K3/00; H05K3/22; H05K3/28; H05K3/285
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
19 words
An amorphous copolymer of perfluoro-2,2-dimethyl-l,3-dioxole with tetrafluoroethylene, which copolymer may also contain at least one other ethylenically unsaturated monomer.
Claim 2
Dependent Claim
19 words
An amorphous copolymer of perfluoro-2,2-dimethyl-l,3-dioxole with tetrafluoroethylene, which copolymer may also contain at least one other ethylenically unsaturated monomer.
Claim 3
Dependent Claim
13 words
A copolymer of Claim 1 which is a dipolymer of perfluoro-2,2-dimethyl-l,3-dioxole with tetrafluoroethylene.
Claim 4
Dependent Claim
17 words
A copolymer of Claim 2 wherein the proportion of perfluoro-2,2-dimethyl-l,3-dioxole is at least about 11 mole percent.
Claim 5
Dependent Claim
42 words
A copolymer of Claim 1 which also contains another ethylenically unsaturated monomer, the proportion of perfluro-2,2-dimethyl-l,3-dioxole being at least 12 mole percent of the tetrafluoroethylene content, and the mole percent content of the third monomer being the smallest of all three monomers.
Claim 6
Dependent Claim
17 words
A copolymer of Claim 4 which is a terpolymer of perfluoro-2,2-dimethyl-1,3-dioxole with tetrafluoroethylene and with an. olefin.
Claim 7
Dependent Claim
10 words
A terpolymer of Claim 5 wherein the olefin is propylene.
Claim 8
Dependent Claim
10 words
A terpolymer of Claim 5 wherein the olefin is isobutylene.
Claim 9
Dependent Claim
10 words
A terpolymer of Claim 5 wherein the olefin is ethylene.
Claim 10
Dependent Claim
16 words
A copolymer of Claim 1 which is a terpolymer of perfluoro-2,2-dimethyl-1,3-dioxole with tetrafluoroethylene and another perfluoromonomer.
Claim 11
Dependent Claim
13 words
A terpolymer of Claim 9 wherein the other perfluoromonomer is 2-[l-[difluoro[(trifluoro- ethenyl)oxy]methyl]-1,2,2,2-tetrafluoroethoxy]-1,1,2,2-tetrafluoroethanesulfonyl fluoride
Claim 12
Dependent Claim
13 words
A terpolymer of Claim 9 wherein the other perfluoromonomer is methyl 3-[l-[difluoro[(tri- fluoroethenyl)oxy]methyl]-1,2,2,2-tetrafluoroethoxy]-2,2,3,3-tetrafluoropropanoate
Claim 13
Dependent Claim
16 words
A terpolymer of Claim 9 wherein the other perfluoromonomer is perfluoropropene, perfluoro-(1,3-dioxole), or a perfluorovinyl ether.
Claim 14
Dependent Claim
10 words
A self-supporting film of an amorphous copolymer of Claim 1.
Claim 15
Dependent Claim
10 words
A self-supporting film of an amorphous copolymer of Claim 3.
References Cited (Backward Citations)
DE2227538A1
Cited
US3978030A
Cited
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