US4910291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical article made of amorphous thermoplastic polyester resin
Assignee: Mitsubishi Chemical Corp
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Filing: 1988-08-05
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Granted: 1990-03-20
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Expires: 2008-08-05
Abstract
Abstract An optical article such as optical disk and optical lens, made of an amorphous thermoplastic polyester resin comprised of recurring units, each recurring unit having an aromatic ring in the main chain thereof and an aromatic ring in the side chain thereof. The optical article have a good heat resistance, resistance to absorption of moisture and optical characteristics.
Inventors
- 👤 Naoki Yamamoto
- 👤 Hiroshi Mori
- 👤 Akira Nakata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:46
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; G; G02; G02B; G02B1/00; G02B1/04; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/245; G11B7/252; G11B7/253
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
An optical article made of an amorphous thermoplastic polyester resin comprised of recurring units represented by the following general formula (I) or (II): ##STR6## wherein R 1 stands for a phenylene group which may have a substituent selected from the group consisting of halogen atoms and an alkyl group having 1 to 5 carbon atoms, R 2 and R 3 independently stand for an alkylene group having 1 to 5 carbon atoms or a direct bond wherein the sum of the carbon numbers of R 2 and R 3 is up to 5, R 4 stands for a benzyl group which may have a substituent selected from the group consisting of halogen atoms and an alkyl group having 1 to 5 carbon atoms, and R 5 stands for a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.
Claim 2
Dependent Claim
141 words
An optical article made of an amorphous thermoplastic polyester resin comprised of recurring units represented by the following general formula (I) or (II): ##STR6## wherein R 1 stands for a phenylene group which may have a substituent selected from the group consisting of halogen atoms and an alkyl group having 1 to 5 carbon atoms, R 2 and R 3 independently stand for an alkylene group having 1 to 5 carbon atoms or a direct bond wherein the sum of the carbon numbers of R 2 and R 3 is up to 5, R 4 stands for a benzyl group which may have a substituent selected from the group consisting of halogen atoms and an alkyl group having 1 to 5 carbon atoms, and R 5 stands for a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.
Claim 3
Dependent Claim
12 words
An optical article according to claim 1, which is an optical disk.
Claim 4
Dependent Claim
12 words
An optical article according to claim 1, which is an optical lens.
Claim 5
Dependent Claim
230 words
An optical article made of an amorphous thermoplastic polyester resin comprised of recurring units derived from a dicarboxylic acid and a diol, at least one of the dicarboxylic acid and the diol having an aromatic ring in the main chain thereof and an aromatic ring in a pendant group thereof; wherein said dicarboxylic acid having an aromatic ring in the main chain thereof and an aromatic ring in a pendant group is represented by the following general formula (III) and said diol having an aromatic ring in the main chain thereof and an aromatic ring in a pendant group is represented by the following general formula (IV): ##STR7## wherein X stands for ##STR8## or a direct bond, R 7 and R 9 stand for hydrogen atom or an alkyl group having 1 to 5 carbon atoms, R 8 and R 10 stand for phenyl or benzyl group which may have a substituent selected from the group consisting of halogen atoms and an alkyl group having 1 to 5 carbon atoms; and when x is a direct bond, R 6 stands for a phenyl or benzyl group which may have a substituent selected from the group consisting of halogen atoms and an alkyl group having 1 to 5 carbon atoms; when X is ##STR9## R 6 stands for a hydrogen atom or a alkyl group having 1 to 5 carbon atoms.
Claim 6
Dependent Claim
230 words
An optical article made of an amorphous thermoplastic polyester resin comprised of recurring units derived from a dicarboxylic acid and a diol, at least one of the dicarboxylic acid and the diol having an aromatic ring in the main chain thereof and an aromatic ring in a pendant group thereof; wherein said dicarboxylic acid having an aromatic ring in the main chain thereof and an aromatic ring in a pendant group is represented by the following general formula (III) and said diol having an aromatic ring in the main chain thereof and an aromatic ring in a pendant group is represented by the following general formula (IV): ##STR7## wherein X stands for ##STR8## or a direct bond, R 7 and R 9 stand for hydrogen atom or an alkyl group having 1 to 5 carbon atoms, R 8 and R 10 stand for phenyl or benzyl group which may have a substituent selected from the group consisting of halogen atoms and an alkyl group having 1 to 5 carbon atoms; and when x is a direct bond, R 6 stands for a phenyl or benzyl group which may have a substituent selected from the group consisting of halogen atoms and an alkyl group having 1 to 5 carbon atoms; when X is ##STR9## R 6 stands for a hydrogen atom or a alkyl group having 1 to 5 carbon atoms.
Claim 7
Dependent Claim
12 words
An optical article according to claim 4, which is an optical disk.
Claim 8
Dependent Claim
12 words
An optical article according to claim 4, which is an optical lens.
Claim 9
Dependent Claim
57 words
An optical article made of an amorphous thermoplastic polyester resin comprised of recurring units derived from a hydroxycarboxylic acid represented by the following general formula (V): ##STR10## wherein X and R 6 are as defined in claim 4, and one of Y and Z stands for a hydroxy group and the other stands for a carboxyl group.
Claim 10
Dependent Claim
12 words
An optical article according t claim 7, which is an optical disk.
Claim 11
Dependent Claim
12 words
An optical article according to claim 7, which is an optical lens.
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