Polycarbonate resin with stable high refractive index as well as preparation method and application of polycarbonate resin

A polycarbonate resin, refractive index technology, applied in the polycarbonate field, can solve the problems of unfavorable optical device image rendering effect and stability, low glass lens stability, large refractive index drop, etc. The effect of low bezel number and high refractive index

Active Publication Date: 2021-06-15
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It also cannot meet the future market demand for lens materials with higher refractive index and thinness
[0006]In addition, because optical lenses (mobile phone, vehicle, security, etc.) are usually used outdoors, they need to withstand changes in temperature in four seasons, while existing optical resin lenses use When the temperature changes in the range of -10 to 50°C, its optical and mechanical properties will also change accordingly, and the stability is poor. Among them, the refractive index will decrease with the increase of the ambient temperature, which is much lower than that of the glass lens. stability
For example, the refractive index of Osaka Gas OKP brand high-refractive resin is 1.6418 at -10°C (436nm), and 1.6319 at 70°C, and the temperature coefficient of refractive index is 1.24×10-3 The drop rate is relatively large, which is not conducive to the imaging effect and stability of the optical device during use

Method used

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  • Polycarbonate resin with stable high refractive index as well as preparation method and application of polycarbonate resin
  • Polycarbonate resin with stable high refractive index as well as preparation method and application of polycarbonate resin
  • Polycarbonate resin with stable high refractive index as well as preparation method and application of polycarbonate resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] 68.03g (0.1mol) BAEBMA, 19.92g (0.093mol) diphenyl carbonate, 0.2μg (5.0×10 -9mol) sodium hydroxide, 2.18μg (5.0×10 -9 mol) lanthanum acetylacetonate was put into a 200ml four-necked flask equipped with a stirrer and a distillation device, replaced with nitrogen 4 times, heated to 210°C under a nitrogen atmosphere of 101Kpa (A), started heating for 60 minutes and confirmed that the raw materials were completely melted, and then opened Stir, adjust the pressure to 20Kpa (A), and at the same time raise the temperature to 250°C at a rate of 30°C / hr. At this time, confirm that the phenol formed as a by-product begins to distill. The temperature was raised to 290°C at a certain speed, and after the temperature reached 290°C, the pressure was gradually reduced to 50 Pa (A) within 1 hour, and the reaction was stirred for 40 minutes under this condition to end the reaction. After the reaction, the four-necked flask was filled with nitrogen to return to normal pressure, and the...

Embodiment 2

[0075] 0.68g (0.001mol) BAEBMA, 46.94g (0.099mol) BHEBA, 25.28g (0.118mol) diphenyl carbonate, 8.401μg (1×10 -7 mol) sodium bicarbonate is put into the 200ml four-necked flask that has stirrer and distillation unit, except that, carry out the operation identical with embodiment 1, the polycarbonate physical parameter that obtains is as shown in table 1, table 2.

Embodiment 3

[0077] 79.63g (0.099mol) BAPEA, 0.63g (0.001mol) BHEBA, 20.99g (0.098mol) diphenyl carbonate, 4.36mg (1.0×10 -5 mol) lanthanum acetylacetonate is put into the 200ml four-necked flask that has stirrer and distillation unit, except that, carry out the operation identical with embodiment 1, the polycarbonate physical property parameter that obtains is as shown in table 1, table 2.

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Abstract

The invention provides stable polycarbonate resin with high refractive index and a preparation method and application thereof. The polycarbonate resin comprises a structural unit as shown in a formula A and optional structural units as shown in a formula B and a formula C. The polycarbonate resin is high in refractive index, good in stability, and capable of meeting the use requirements of optical lenses; the manufacturing method is simple, and has the industrial application prospect.

Description

technical field [0001] The invention relates to the field of polycarbonate, in particular to a polycarbonate resin with a stable high refractive index, a preparation method thereof and an application in the field of optical lenses. Background technique [0002] The arrival of the era of dual-camera smartphones, the rapid development of autonomous driving technology, and the imminent explosion of VR / AR equipment will drive a new round of demand for optical lenses. The downstream application fields of optical lenses will bloom everywhere, and there is room for future growth huge. The lens material is a key factor in determining the image quality of the lens. Among them, plastic lenses are widely used in mobile devices such as mobile phones and tablets due to their strong plasticity, easy to make aspherical shapes, and convenient miniaturization. [0003] Optical resin is easy to form and has high production efficiency. Currently, more and more lenses are made of optical resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/16C08G64/30G02B1/04
CPCC08G64/305C08G64/1608G02B1/041G02B1/04
Inventor 靳少华曾伟赵欣黎雷魏志涛李凤闯王磊黎源
Owner WANHUA CHEM GRP CO LTD
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