Polycarbonate resin composition and optical lens using same

Patent metadata

Field	Value
Publication number	US-2025059324-A1
Application number	US-202218710779-A
Country	US
Kind code	A1
Filing date	Nov 28, 2022
Priority date	Nov 30, 2021
Publication date	Feb 20, 2025
Grant date	—

Abstract

According to the present invention, it is possible to provide a polycarbonate resin composition which includes a structural unit (A) derived from a monomer represented by general formula (i) and a structural unit (B) derived from a monomer represented by general formula (ii), and in which the structural unit (A) and the structural unit (B) are contained at a mass ratio of structural unit (A): structural unit (B)=91:9 to 99:1.(In general formula (i), R represents a hydrogen atom or an alkyl group having 1-4 carbon atoms.)(In general formula (ii), R1, R2, R3, and R4 each independently represent a hydrogen atom or the like, and Y1 and Y2 each independently represent an alkylene group having 1-4 carbon atoms.)

First claim

1 . A polycarbonate resin composition comprising a structural unit (A) derived from a monomer represented by general formula (i) and a structural unit (B) derived from a monomer represented by general formula (ii),
wherein the structural unit (A) and the structural unit (B) are contained at a mass ratio of structural unit (A): structural unit (B)=91:9 to 99:1:

wherein in general formula (i), R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms,

wherein in general formula (ii), R 1 , R 2 , R 3 , and R 4 each independently represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an alkoxyl group having 1 to 20 carbon atoms, a cycloalkyl group having 5 to 20 carbon atoms, a cycloalkoxyl group having 5 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an aryloxy group having 6 to 20 carbon atoms, and Y 1 and Y 2 each independently represent an alkylene group having 1 to 4 carbon atoms.

2 . The polycarbonate resin composition according to claim 1 , which comprises a resin mixture of a polycarbonate resin (A) having the structural unit (A) and a polycarbonate resin (B) having the structural unit (B).

3 . The polycarbonate resin composition according to claim 1 , wherein in general formula (ii), R 1 and R 2 each independently represent a hydrogen atom or a phenyl group, and R 3 and R 4 represent a hydrogen atom.

4 . The polycarbonate resin composition according to claim 1 , wherein R in general formula (i) represents a hydrogen atom.

5 . The polycarbonate resin composition according to claim 1 , which has a photoelastic coefficient of 11.0 to 12.0 ×10 −12 m 2 /N).

6 . The polycarbonate resin composition according to claim 1 , which has an Abbe number of 46 to 55.

7 . The polycarbonate resin composition according to claim 1 , which has a refractive index (nD) of 1.533 to 1.547.

8 . The polycarbonate resin composition according to claim 1 , which has Tg of 132 to 135° C.

9 . An optical lens comprising the polycarbonate resin composition according to claim 1 .

Assignees

• Mitsubishi Gas Chemical Co

Inventors

• Kato Noriyuki
• NISHIMORI Katsushi
• Motegi Atsushi
• Ishihara Kentaro
• FUKUI Kiyoshiro

Classifications

• G02B1/041 Primary

  Lenses · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C08L69/00 Primary

  Compositions of polycarbonates; Compositions of derivatives of polycarbonates · CPC title

• C08G64/305

  and alcohols · CPC title

• C08G64/06

  not containing aliphatic unsaturation · CPC title