Polyester carbonate resin, and molded body which is obtained by molding resin composition containing said resin

A technology of polyester carbonate and molded body, applied in the direction of instruments, lenses, optical components, etc., can solve the problems of high material cost, poor molding processability, low productivity, etc., achieve high glass transition temperature, reduce photoelastic coefficient, good fluidity

Active Publication Date: 2021-11-09
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Optical glass is excellent in heat resistance, transparency, dimensional stability, chemical resistance, etc., and there are many materials with various refractive indices (nD) and Abbe numbers (νD), but there are not only high material costs, but also molding Problems such as poor processability and low productivity
In particular, in order to process aspheric lenses for aberration correction, extremely high technology and high cost are required, which has become a major obstacle in practical use.

Method used

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  • Polyester carbonate resin, and molded body which is obtained by molding resin composition containing said resin
  • Polyester carbonate resin, and molded body which is obtained by molding resin composition containing said resin
  • Polyester carbonate resin, and molded body which is obtained by molding resin composition containing said resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0284] D-NHEs: 56.14g (0.224mol), D-NDM: 199.30g (0.896mol), diphenyl carbonate (DPC): 192.24g (0.897mol) and tetrabutoxytitanium: 38.6mg (11.3×10 －5 mol) were added to a 500mL reactor equipped with a stirrer and a distillation device, nitrogen gas was introduced into the system, and heated to 180° C. for 1 hour while stirring under a nitrogen atmosphere of 101.3 kPa. Then, after reaching 180°C, the pressure was reduced to 40kPa over 30 minutes, and the temperature was raised to 255°C over 2 hours from the start of decompression, and when methanol and phenol were distilled out to 60%, the pressure was reduced over 1 hour. Pressure to below 0.133kPa. Thereafter, the temperature was maintained at 0.133 kPa or lower for 30 minutes to obtain a polyester carbonate resin (1).

[0285] The physical properties of this polyester carbonate resin (1) are Mw: 31,000, Tg: 141°C, MVR: 38cm 3 / 10min, refractive index nd: 1.532, specific gravity: 1.19, birefringence: 88nm, photoelastic coef...

Embodiment 2

[0287] D-NHEs: 89.44g (0.357mol), D-NDM: 185.32g (0.834mol), diphenyl carbonate (DPC): 178.75g (0.834mol) and tetrabutoxytitanium: 20.2mg (5.9×10 －5 mol) were added to a 500mL reactor equipped with a stirrer and a distillation device, and the same operation as in Example 1 was performed to obtain a polyester carbonate resin (2).

[0288] The physical properties of this polyester carbonate resin (2) are Mw: 29,000, Tg: 142°C, MVR: 48cm 3 / 10min, refractive index nd: 1.534, specific gravity: 1.19, birefringence: 76nm, photoelastic coefficient: 5×10 －12 Pa －1 .

Embodiment 3

[0290] D-NHEs: 154.68g (0.618mol), D-NDM: 137.36g (0.618mol), diphenyl carbonate (DPC): 134.34g (0.627mol) and tetrabutoxytitanium: 20.5mg (6.0×10 －5 mol) were respectively added to a 500mL reactor equipped with a stirrer and a distillation device, and the same operation as in Example 1 was performed to obtain a polyester carbonate resin (3).

[0291] The physical properties of this polyester carbonate resin (3) are Mw: 29,000, Tg: 145°C, MVR: 52cm 3 / 10min, refractive index nd: 1.535, specific gravity: 1.18, birefringence: 65nm, photoelastic coefficient: 4×10 －12 Pa －1 .

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Abstract

The present invention provides a polyester carbonate resin which has a constituent unit (I) represented by general formula (1), a constituent unit (II) represented by general formula (2) and a constituent unit (III) represented by general formula (3). (In formula (1), each of R1-R3 independently represents a hydrogen atom, a methyl group or an ethyl group. In formula (2), Q represents a divalent linking group.).

Description

technical field [0001] The present invention relates to a polyester carbonate resin and a molded article obtained by molding a resin composition containing the resin. Background technique [0002] Optical glass or optical transparent resin is used as a material for optical elements used in optical systems of various cameras such as cameras, film-integrated cameras, and video cameras. [0003] Optical glass is excellent in heat resistance, transparency, dimensional stability, chemical resistance, etc., and there are many materials with various refractive indices (nD) and Abbe numbers (νD), but there are not only high material costs, but also molding There are problems of poor processability and low productivity. In particular, processing into an aspheric lens for aberration correction requires extremely high technology and high cost, which is a major obstacle in practical use. [0004] On the other hand, optical transparent resins, especially optical lenses made of thermopl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/00G02B1/04C08G63/64
CPCC08G63/64G02B1/041C08L69/005C08G64/0208G02B1/04
Inventor 平川学本多荣一吉村康明佐竹雄一郎
Owner MITSUBISHI GAS CHEM CO INC
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