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EP0089801A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Optical element and optical resin composition for the preparation thereof

Assignee: Konica Minolta Inc
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Filing: 1983-03-16
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Granted: —
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Expires: 2003-03-16
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Abstract

Abstract Problems of birefringence can be avoided in an optical element including an optical resin composition consisting essentially of certain polycarbonates having a melt flow rate of more than or equal to 5.0 g/10 min. as measured based on ISO R-1133 Standard at 230 DEG C and 5 kgf., and having a glass transition point of more than or equal to 100 DEG C. The polycarbonates preferably include major repeating units having the formula (I) or (II). …<??>Formula (I) …… &lparstr& O - Ar1 - R - Ar2 - O@ &rparstr& … …<??>Formula (II) …… &lparstr& O - A - R - O@ &rparstr& … wherein Ar1 and AR2 each represent an arylene group or a cycloalkylene group; R represents an alkylene group, a cycloalkylene group, -O-, -O-Ar3-O-, -S-, -SO-, -SO2-, -SO2-Ar3-SO2-, -R1-Ar4-R1-, -O-R1-O-, …<CHEM>… -CONH-R1-NHCO-, or -Ar5-R1-; Ar3 and Ar4 each represent a phenylene group or a bisphenylene group; R1 represents an alkylene group; R2 represents an alkyl group; Ar5 represents a cycloalkylene group, -R1-Ar4-R1-, -R1-Ar5-R1-, -R1-O-Ar4-O-R1-, or -R1-O-Ar4-X-Ar4-O-R1; and X represents -SO2-, -CO-, an alkylene group. or -R1-Ar4-R1-.

Inventors

  • 👤 Sota Kawakami
  • 👤 Hideki Murata
  • 👤 Satoshi Matsunaga
  • 👤 Toshihiko Kiriki

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-26 11:05
CPC Classifications
C; C08; C08L; C08L69/00

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 58 words
An optical element including an optical resin composition consisting essentially of a polycarbonate, characterized in that said optical resin composition has a melt flow rate of more than or equal to 5.0 g/10 min. as measured based on ISO R-1133 Standard at 230°C and 5 kgf., and a glass transition point of more than or equal to 100°C.
Claim 2
Dependent Claim 58 words
An optical element including an optical resin composition consisting essentially of a polycarbonate, characterized in that said optical resin composition has a melt flow rate of more than or equal to 5.0 g/10 min. as measured based on ISO R-1133 Standard at 230°C and 5 kgf., and a glass transition point of more than or equal to 100°C.
Claim 3
Dependent Claim 170 words
An optical element according to Claim 1, characterized in that said polycarbonate has a major repeating unit of the formula (I) or (II), wherein Ar 1 and Ar 2 each represent an arylene group or a cycloalkylene group; R represents an alkylene group, a cycloalkylene group, -0-, -O-Ar 3 -O-, -S-, -SO-, -SO 2 -, -SO 2 -Ar 3 -SO 2 -, -R 1 -Ar 4 -R 1 -, -O-R 1 -O-, -CONH-R 1 -NHCO-, or -Ar 5 -R 1 - ; Ar 3 and Ar4 each represent a phenylene group or a bisphenylene group; R 1 represents an alkylene group; R 2 represents an alkyl group; Ar 5 represents a cycloalkylene group; A represents an alkylene group, a cycloalkylene group, -R 1 -Ar 4 -R 1 -, -R 1 -Ar 5 -R 1 -, -R 1 -O-Ar 4 -O-R l -, or -R 1 -O-Ar 4 -X-Ar 4 -O-R 1 -; and X represents -S0 2 -, -CO-, an alkylene group, or -R 1 -Ar 4 -R 1 -.
Claim 4
Dependent Claim 33 words
An optical element according to Claim 2, characterized in that said major repeating unit has the formula (III) wherein R4 represents and R 5 and R 6 each represent hydrogen, halogen or alkyl.
Claim 5
Dependent Claim 55 words
An optical resin composition consisting essentially of a polycarbonate, characterized in that said optical resin composition has a melt flow rate of more than or equal to 5.0 g/10 min. as measured based on ISO R-1133 Standard at 230°C and 5 Kgf., and has a glass transition point of more than or equal to 100°C.
Claim 6
Dependent Claim 55 words
An optical resin composition consisting essentially of a polycarbonate, characterized in that said optical resin composition has a melt flow rate of more than or equal to 5.0 g/10 min. as measured based on ISO R-1133 Standard at 230°C and 5 Kgf., and has a glass transition point of more than or equal to 100°C.
Claim 7
Dependent Claim 171 words
An optical resin composition according to Claim 4, characterized in that said polycarbonate has a major repeating unit of the formula (I) or (II). wherein Ar 1 and Ar 2 each represent an arylene group or a cycloalkylene group; R represents an alkylene group, a cycloalkylene group, -0-, -O-Ar 3 -O-, -S-, -SO-, -SO 2 -, -SO 2 -Ar 3 -SO 2 -, -R 1 -Ar 4 -R 1 -, -O-R 1 -O-, -CONH-R 1 -NHCO-, or -Ar 5 -R 1 -; Ar 3 and Ar 4 each represent a phenylene group or a bisphenylene group; R 1 represents an alkylene group; R 2 represents an alkyl group; Ar 5 represents a cycloalkylene group; A represents an alkylene group, a cycloalkylene group, -R 1 -Ar 4 -R 1 -, -R 1 -Ar 5 -R 1 -, -R 1 -O-Ar 4 -O-R 1 , or -R 1 -O-Ar 4 -X-Ar 4 -O-R 1 -; and X represents -SO 2 -, -CO-, an alkylene group, or -R 1 -Ar 4 -R 1 -.
Claim 8
Dependent Claim 38 words
An optical resin composition according to Claim 5, characterized in that said major repeating unit has the formula (III) wherein R 4 represents and R 5 and R6 each represent a hydrogen, a halogen or an alkyl group.

References Cited (Backward Citations)

GB939447A Cited
DE2701173A1 Cited
US4216305A Cited
EP0044911A2 Cited

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