US4420225A
Expired / Lapsed
US
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Lens of a homo- or copolymer of a fluorine containing styrene polymer
Assignee: Bayer AG
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Filing: 1981-09-25
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Granted: 1983-12-13
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Expires: 2001-09-25
Abstract
Abstract A homopolymer or copolymer which contains, as a monomer unit, at least one styrene of the formula ##STR1## in which R 1 , R 2 and R 3 independently of one another denote hydrogen, fluorine or partly or completely fluorinated alkyl or alkoxy and R 4 and R 5 independently of one another represent hydrogen or fluoride, the total number of fluorine atoms in the radicals R 1 to R 5 being at least 3 and the total number of carbon atoms in the radicals R 1 to R 3 being at most 8. The homo- or copolymers can be prepared by vinyl polymerization. They are useful as lenses or other components in an optical system where they have a refractive index n D of 1.42 to 1.55 with an Abbe number v D of 30 to 50.
Inventors
- 👤 Bruno Bomer
- 👤 Carlhans Suling
- 👤 Joachim Konig
- 👤 Hans Hespe
- 👤 Carl Heynemann
- 👤 Raimund Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:04
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/14; C08F12/16; C08F12/20
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
134 words
A lens comprising a homopolymer which contains, as a monomer unit, at least one styrene of the formula ##STR5## in which R 1 , R 2 and R 3 independently of one another denote hydrogen or partly or completely fluorinated alkyl or alkoxy and R 4 and R 5 independently of one another represent hydrogen or fluorine, the total number of fluorine atoms in the radicals R 1 to R 5 being at least 3 and the total number of carbon atoms in the radicals R 1 to R 3 being at most 8, said homopolymer having an n D value of between about 1.42 and about 1.55 and a v D value of between about 30 and about 50, and said homopolymer selected from the group consisting of ortho-, meta- and para-trifluoromethyl styrene.
Claim 2
Dependent Claim
134 words
A lens comprising a homopolymer which contains, as a monomer unit, at least one styrene of the formula ##STR5## in which R 1 , R 2 and R 3 independently of one another denote hydrogen or partly or completely fluorinated alkyl or alkoxy and R 4 and R 5 independently of one another represent hydrogen or fluorine, the total number of fluorine atoms in the radicals R 1 to R 5 being at least 3 and the total number of carbon atoms in the radicals R 1 to R 3 being at most 8, said homopolymer having an n D value of between about 1.42 and about 1.55 and a v D value of between about 30 and about 50, and said homopolymer selected from the group consisting of ortho-, meta- and para-trifluoromethyl styrene.
Claim 3
Dependent Claim
134 words
A lens comprising a copolymer which contains, as a monomer unit, at least one styrene of the formula ##STR6## in which R 1 , R 2 and R 3 independently of one another denote hydrogen or partly or completely fuorinated alkyl or alkoxy and R 4 and R 5 independently of one another represent hydrogen or fluorine, the total number of fluorine atoms in the radicals R 1 to R 5 being at least 3 and the total number of carbon atoms in the radicals R 1 to R 3 being at most 8, said copolymer having an n D value of between about 1.42 and about 1.55 and a v D value of between about 30 and about 50, and said copolymer selected from the group consisting of ortho-, meta and para-trifluoromethyl styrene.
Claim 4
Dependent Claim
134 words
A lens comprising a copolymer which contains, as a monomer unit, at least one styrene of the formula ##STR6## in which R 1 , R 2 and R 3 independently of one another denote hydrogen or partly or completely fuorinated alkyl or alkoxy and R 4 and R 5 independently of one another represent hydrogen or fluorine, the total number of fluorine atoms in the radicals R 1 to R 5 being at least 3 and the total number of carbon atoms in the radicals R 1 to R 3 being at most 8, said copolymer having an n D value of between about 1.42 and about 1.55 and a v D value of between about 30 and about 50, and said copolymer selected from the group consisting of ortho-, meta and para-trifluoromethyl styrene.
Claim 5
Dependent Claim
126 words
A lens comprising a homopolymer which contains, as a monomer unit, at least one styrene of the formula ##STR7## in which R 1 , R 2 and R 3 independently of one another denote hydrogen or partly or incompletely fluorinated alkyl or alkoxy and R 4 and R 5 independently of one another represent hydrogen or fluorine, the total number of fluorine atoms in the radicals R 1 to R 5 being at least 3 and the total number of carbon atoms in the radicals R 1 to R 3 being at most 8, said homopolymer having an n D value of between about 1.42 and about 1.55 and a v D value of between about 30 and about 50, and said homopolymer comprising poly-p-perfluoroisopropyl styrene.
Claim 6
Dependent Claim
126 words
A lens comprising a homopolymer which contains, as a monomer unit, at least one styrene of the formula ##STR7## in which R 1 , R 2 and R 3 independently of one another denote hydrogen or partly or incompletely fluorinated alkyl or alkoxy and R 4 and R 5 independently of one another represent hydrogen or fluorine, the total number of fluorine atoms in the radicals R 1 to R 5 being at least 3 and the total number of carbon atoms in the radicals R 1 to R 3 being at most 8, said homopolymer having an n D value of between about 1.42 and about 1.55 and a v D value of between about 30 and about 50, and said homopolymer comprising poly-p-perfluoroisopropyl styrene.
Claim 7
Dependent Claim
15 words
A lens according to claim 1 wherein said homopolymer is a homopolymer of ortho-trifluoromethyl styrene.
Claim 8
Dependent Claim
15 words
A lens according to claim 1 wherein said homopolymer is a homopolymer of meta-trifluoromethyl styrene.
Claim 9
Dependent Claim
16 words
A lens according to claim 1 wherein said lens is made of a para-trifluoromethyl styrene homopolymer.
Claim 10
Dependent Claim
14 words
A lens according to claim 1 wherein R 4 and R 5 are hydrogen.
Claim 11
Dependent Claim
19 words
A lens according to claim 2 wherein said copolymer is derived from ortho-trifluoromethyl styrene and methacrylic acid methyl ester.
Claim 12
Dependent Claim
17 words
A lens according to claim 1 wherein said homopolymer contains monomer units comprising ortho-trifluoromethyl styrene and styrene.
Claim 13
Dependent Claim
18 words
A lens according to claim 1 wherein said homopolymer contains monomer units comprising ortho-trifluoromethyl styrene and n-butyl acrylate.
Claim 14
Dependent Claim
18 words
A lens according to claim 1 wherein said homopolymer contains monomer units comprising ortho-trifluoromethyl styrene and ethyl acrylate.
Claim 15
Dependent Claim
17 words
A lens according to claim 1 wherein said homopolymer contains monomer units comprising ortho-trifluoromethyl styrene and acrylonitrile.
Claim 16
Dependent Claim
20 words
A lens according to claim 2 wherein said copolymer is derived from a mixture of 2,4-bis-trifluoromethyl styrene and 2,5-bis-trifluoromethyl styrene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |