US5066746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfluorocyclobutane ring-containing polymers
Assignee: Dow Chemical Co
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Filing: 1990-06-07
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Granted: 1991-11-19
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Expires: 2010-06-07
Abstract
Abstract The present invention is a process for preparing a polymer having perfluorocyclobutane rings by the steps of (a) contacting monomers having at least two dimerizable perfluorovinyl groups; and (b) exposing the monomers to sufficient heat and for a sufficient time that a polymer containing perfluorocyclobutane rings is formed wherein at least about 0.05 mole percent of the monomer, have at least 3 dimerizable perfluorovinyl groups and polymers prepared thereby.
Inventors
- 👤 Katherine S. Clement
- 👤 David A. Babb
- 👤 Bobby R. Ezzell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:15
CPC Classifications
C; C10; C10M; C10M107/00; C10M107/38; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/14; C07C43/17; C07C43/20; C07C43/225; C07C65/00; C07C65/21; C07C65/24; C08; C08F; C08F16/00; C08F16/12; C08F16/32; C10M105/00; C10M105/50; C10M105/54; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10; C07C2603/12; C07C2603/18
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
61 words
A process for preparing a polymer having perfluorocyclobutane rings comprising the steps of: (a) contacting monomers having at least two dimerizable perfluorovinyl groups; and (b) exposing the monomers to sufficient heat and for a sufficient time that a polymer containing perfluorocyclobutane rings is formed wherein at least about 0.05 mole percent of the monomers have at least three dimerizable perfluorovinyl groups.
Claim 2
Dependent Claim
61 words
A process for preparing a polymer having perfluorocyclobutane rings comprising the steps of: (a) contacting monomers having at least two dimerizable perfluorovinyl groups; and (b) exposing the monomers to sufficient heat and for a sufficient time that a polymer containing perfluorocyclobutane rings is formed wherein at least about 0.05 mole percent of the monomers have at least three dimerizable perfluorovinyl groups.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the monomers are heated to a temperature of at least about 50° C.
Claim 4
Dependent Claim
17 words
The process of claim 2 wherein the monomers have at least one atom between dimerizable perfluorovinyl groups.
Claim 5
Dependent Claim
12 words
The process of claim 3 wherein the atom is a carbon atom.
Claim 6
Dependent Claim
16 words
The process of claim 3 wherein the monomers also have at least one aromatic molecular fragment.
Claim 7
Dependent Claim
12 words
The process of claim 5 wherein the atom is oxygen or sulfur.
Claim 8
Dependent Claim
19 words
The process of claim 5 wherein the aromatic molecular fragment has from about 6 to about 50 carbon atoms.
Claim 9
Dependent Claim
16 words
The process of claim 7 wherein the aromatic molecular fragment has more than one aromatic ring
Claim 10
Dependent Claim
36 words
The process of claim 7 wherein the aromatic molecular fragment is selected from the group consisting of 4,4'-biphenylene; phenylene; 9,9-diphenylenefluorene; oxydiphenylene; thiodiphenylene; 2,2-diphenylenepropane; 1,1,1,3,3,3-hexafluoro-2,2-diphenylenepropane; 1,1-diphenylene-1-phenylethane; 1,1-1-triphenyleneethane; 1,3,5-triphenylene benzene; 1,3,5-tris(2-phenylene- 2propyl)benzene; 1,1,1-triphenylenemethane; 1,1,2,2-tetraphenylene-1,2-diphenylethane, 1-(2-phenylene-2-propyl)-4-(1,1-diphenyleneethyl)benzene; naphthalene; and anthracene.
Claim 11
Dependent Claim
19 words
The process of claim 7 wherein the monomers are heated to a temperature of at least about 100° C.
Claim 12
Dependent Claim
17 words
The process of claim 7 wherein the temperature is from about 125° C. to about 350° C.
Claim 13
Dependent Claim
43 words
The process of claim 10 wherein the monomers are heated to a first temperature and for a time sufficient to increase viscosity of the monomers, then heated to a second higher temperature and for a time sufficient to result in a crosslinked polymer.
Claim 14
Dependent Claim
31 words
The process of claim 12 wherein the first temperature is from about 50° C. to about 400° C. and the second temperature is from about 100° C. to about 450° C.
Claim 15
Dependent Claim
30 words
The process of claim 13 wherein the first temperature is from about 105° C. to about 250° C. and the second temperature is from about 120° C. to about 400CC.
Claim 16
Dependent Claim
24 words
The process of claim 1 wherein from about 0.5 to about 100 mole percent of the monomers have at least three dimerizable perfluorovinyl groups.
Claim 17
Dependent Claim
24 words
The process of claim 1 wherein from about 0.05 to about 75 mole percent of the monomers have at least three dimerizable perfluorovinyl groups.
Claim 18
Dependent Claim
24 words
The process of claim 1 wherein from about 75 to about 100 mole percent of the monomers have at least three dimerizable perfluorovinyl groups.
Claim 19
Dependent Claim
24 words
The process of claim 17 wherein from about 85 to about 100 mole percent of the monomers have at least three dimerizable perfluorovinyl groups.
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