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US4399264A Expired / Lapsed US ⏱️ 0.0 years remaining

Perfluorodioxole and its polymers

Assignee: EIDP Inc
•
Filing: 1981-11-19
•
Granted: 1983-08-16
•
Expires: 2001-11-19
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Abstract

Abstract Perfluoro-1,3-dioxole is a useful monomer, which polymerizes to either amorphous or liquid homopolymers and copolymerizes with tetrafluoroethylene as well as with other monomers to both crystalline and amorphous copolymers having one or more such comonomers incorporated therein. Amorphous homopolymers and copolymers of perfluoro-1,3-dioxole are useful in such applications as glazing for reactors for hydrogen fluoride reactions. Amorphous homopolymers and amorphous or crystalline copolymers form self-supporting films and can be used for coatings and linings which are inert to most chemicals and are stain and weather resistant and as dielectrics for electrical and electronic equipment. Liquid homopolymers can be used as hydraulic fluids and heat exchange media.

Inventors

  • 👤 Edward N. Squire

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 17:59
CPC Classifications
C; C08; C08F; C08F34/00; C08F34/02; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/32; C07D317/42; C08F214/00; C08F214/18; C08F214/26; C08F214/262

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 27 words
A copolymer of perfluoro-1,3-dioxole selected from the group consisting of dipolymers of perfluoro-1,3-dioxole with fluoroolefins and terpolymers of perfluoro-1,3-dioxole with tetrafluoroethylene and with another ethylenically unsaturated monomer.
Claim 2
Dependent Claim 27 words
A copolymer of perfluoro-1,3-dioxole selected from the group consisting of dipolymers of perfluoro-1,3-dioxole with fluoroolefins and terpolymers of perfluoro-1,3-dioxole with tetrafluoroethylene and with another ethylenically unsaturated monomer.
Claim 3
Dependent Claim 14 words
A dipolymer of claim 1, which is an amorphous copolymer of perfluoro-1,3-dioxole with tetrafluoroethylene.
Claim 4
Dependent Claim 14 words
A dipolymer of claim 1, which is a crystalline copolymer of perfluoro-1,3-dioxole with tetrafluoroethylene.
Claim 5
Dependent Claim 26 words
A terpolymer of claim 1 wherein the ethylenically unsaturated monomer is an olefin, a fluoroolefin, or a monomer other than a fluoroolefin having a functional group.
Claim 6
Dependent Claim 20 words
A copolymer of claim 1, which is an amorphous terpolymer of perfluoro-1,3-dioxole with tetrafluoroethylene and with another ethylenically unsaturated monomer.
Claim 7
Dependent Claim 26 words
A copolymer of claim 1 selected from the group consisting of dipolymer of perfluoro-1,3-dioxole with vinylidene fluoride and terpolymer of perfluoro-1,3-dioxole with tetrafluoroethylene and vinylidene fluoride.
Claim 8
Dependent Claim 4 words
A homopolymer of perfluoro-1,3-dioxole.
Claim 9
Dependent Claim 4 words
A homopolymer of perfluoro-1,3-dioxole.
Claim 10
Dependent Claim 19 words
A homopolymer of claim 7 which has two glass transition temperatures, namely at about 172°-179° C. and 212° C.
Claim 11
Dependent Claim 24 words
A copolymer of perfluoro-1,3-dioxole with a minor amount of tetrahydrofuran, which copolymer has a glass transition temperature in the range of about 84°-92° C.
Claim 12
Dependent Claim 24 words
A copolymer of perfluoro-1,3-dioxole with a minor amount of tetrahydrofuran, which copolymer has a glass transition temperature in the range of about 84°-92° C.

References Cited (Backward Citations)

US3308107A Cited
US3734862A Cited
US3978030A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-08-15 1987-02-14 1987-08-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-08-15 1991-02-14 1991-08-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-08-15 1995-02-14 1995-08-16 $7700.00 Window Closed / Lapsed

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