Patent EP0964009A1 successfully refreshed from Google Patents.
EP0964009A1
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Polymerization of fluoromonomers in carbon dioxide
Assignee: EIDP Inc
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Filing: 1999-05-28
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Granted: —
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Expires: 2019-05-28
Abstract
Abstract Polymerization of vinylidene fluoride in carbon dioxide media is effectively initiated by dialkyl(2,2-azobisisobutyrate). Methyl is a preferred alkyl.
Inventors
- 👤 Paul Douglas Brothers
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 18:06
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/26; C08F14/00; C08F14/18; C08F214/22; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/54; Y10; Y10S; Y10S526/00; Y10S526/942
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
32 words
A process for preparing a fluoropolymer, comprising polymerizing
at least one fluorinated monomer in a fluid medium using an azo initiator, wherein
said fluid medium comprises carbon dioxide, said initiator is dialkyl(2,2'-azobisisobutyrate).
Claim 2
Dependent Claim
10 words
The process of Claim 1, wherein said monomer is fluoroolefin.
Claim 3
Dependent Claim
20 words
The process of Claim 1, wherein said polymer is a copolymer of
fluoroolefin and at least one copolymerizable fluorinated comonomer.
Claim 4
Dependent Claim
28 words
The process of Claim 3, wherein said comonomer is selected from
fluoroolefins, other than said fluoroolefin, having 2-8 carbon atoms and
fluorinated vinyl ethers having 3-8 carbon atoms.
Claim 5
Dependent Claim
13 words
The process of Claim 2, wherein said fluoroolefin is vinylidene
fluoride or tetrafluoroethylene.
Claim 6
Dependent Claim
25 words
The process of Claim 4, wherein said comonomer is at least one of
tetrafluoroethylene, hexafluoropropylene, perfluoro(methyl vinyl ether),
perfluoro(ethyl vinyl ether), and perfluoro(propyl vinyl ether).
Claim 7
Dependent Claim
10 words
The process of Claim 3, wherein said polymer is elastomeric.
Claim 8
Dependent Claim
10 words
The process of Claim 3, wherein said polymer is thermoplastic.
Claim 9
Dependent Claim
11 words
The process of Claim 1, wherein said polymer is a homopolymer.
Claim 10
Dependent Claim
13 words
The process of Claim 1, wherein said carbon dioxide is liquid or
supercritical.
Claim 11
Dependent Claim
13 words
The process of Claim 1, wherein said medium consists essentially
of carbon dioxide.
Claim 12
Dependent Claim
21 words
The process of Claim 1, wherein said alkyls are independently
selected from methyl, ethyl, propyl, n-butyl, isobutyl, secondary butyl, and
n-amyl.
Claim 13
Dependent Claim
12 words
The process of Claim 1, wherein each of said alkyls is methyl.
References Cited (Backward Citations)
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