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Polycarbonate and preparation method and application thereof

A polycarbonate, an independent technology, applied in the field of polycarbonate and its preparation, can solve the problems of complex lens composition, large chromatic aberration, etc., and achieve the effect of multi-selectivity, high glass transition temperature, and high refractive index

Pending Publication Date: 2021-01-05
WANHUA CHEM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Studies have shown that the higher the refractive index of the optical lens, the lighter and thinner the lens. Therefore, the existing technology has been devoted to the research of polycarbonate with high refractive index; and the higher the refractive index of the lens, the lower the Abbe number , the more obvious the dispersion, the greater the chromatic aberration. In the optical system of the camera, the chromatic aberration is usually corrected by a combination of multiple concave lenses and convex lenses, which makes the lens composition of the optical system very complicated.

Method used

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  • Polycarbonate and preparation method and application thereof
  • Polycarbonate and preparation method and application thereof
  • Polycarbonate and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example 1

[0160] 2,2-bis(2-hydroxyethoxy)-6,6-diphenyl-1,1-dithionaphthalene (BINSL-2EO)

[0161] The synthetic route is as follows:

[0162]

[0163] (1) In a four-necked flask equipped with a magnetic stirrer, a thermometer, a constant pressure dropping funnel and a condensing reflux tube, add 223g (1mol) of 6-bromo-2-naphthol (Wuhan Rongcan Biopharmaceutical) and toluene and Mixed solution 500mL of ethyl acetate (mass ratio of toluene to ethyl acetate is 3:2), stir to make it dissolve, under ice bath condition, slowly add sulfur dichloride 53g (0.52mol), control reaction system temperature at Around 15°C. After dripping, continue to react for 3h. Raise the temperature to 100°C, distill off most of the solvent, put it in the refrigerator to freeze for 1 hour, a solid precipitates out, filter, recrystallize with absolute ethanol, filter and dry to obtain 6,6-dibromo-1,1-dithionaphthalene phenol.

[0164] (2) In the reactor, 6,6-dibromo-1,1-dithionaphthalene 1mol and phenylboroni...

preparation example 2

[0168] 2,2-bis(2-hydroxyethoxy)-6,6-bis(naphthalene-1-yl)-1,1-dithionaphthalene (1DNBINSL-2EO)

[0169] The synthetic route is as follows:

[0170]

[0171] The difference between the specific preparation method and Preparation Example 1 is that the phenylboronic acid in step (2) is replaced with an equimolar amount of 1-naphthylboronic acid (Puyang Huicheng Technology); other reaction steps are the same as Preparation Example 1, The target product 1DNBINSL-2EO was obtained.

[0172] The NMR results of the target product are as follows: 1 H-NMR (400MHz, CDCl 3 )δ / ×10 -6 : 8.55(t, 2H), 8.42(t, 2H), 8.08-8.04(m, 6H), 7.95(t, 2H), 7.86(d, 2H), 7.61-7.55(m, 8H), 6.85(d , 2H), 4.43(t, 4H), 3.69(m, 4H), 3.65(m, 2H).

preparation example 3

[0174] 2,2-bis(2-hydroxyethoxy)-1,1-dithionaphthalene (BNSE)

[0175] The synthetic route is as follows:

[0176]

[0177] (1) In a four-necked flask equipped with a magnetic stirrer, a thermometer, a constant pressure dropping funnel and a condensing reflux tube, add 144g (1mol) of 2-naphthol (Jiangsu chiral chemical industry) and toluene and ethyl acetate successively. Mix 500mL of the solution (the mass ratio of toluene to ethyl acetate is 3:2), stir to dissolve it, and slowly add 53g (0.52mol) of sulfur dichloride dropwise under ice bath conditions, and control the temperature of the reaction system at about 15°C. After dripping, continue to react for 3h. The temperature was raised to 100°C, most of the solvent was distilled off, and then put into the refrigerator to freeze for 1 hour. Solids were precipitated, filtered, recrystallized from absolute ethanol, filtered, and dried to obtain bithionaphthol.

[0178] (2) In the reactor, add the dithionaphthol, sodium hydro...

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Abstract

The invention provides polycarbonate and a preparation method and application thereof, the polycarbonate comprises a repeating unit with a structure as shown in a formula I, and the repeating unit comprises a specific dithionaphthalene group, so that the polycarbonate has high refractive index, high Abbe number and excellent hydrothermal stability, and the performance requirements of polycarbonateserving as optical resin in optical parts can be fully met. The refractive index of the polycarbonate reaches up to 1.66-1.75, the Abbe number is 20-40, and the polycarbonate has high transparency, high refractive index, high Abbe number and excellent hydrothermal stability, and can fully meet the application requirements of polycarbonate materials in high-performance optical components. The optical lens comprising the polycarbonate has the characteristics of lightness, thinness, low chromatic aberration and low chromatic dispersion, and provides more selectivity for the combination of optical systems.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polycarbonate and its preparation method and application. Background technique [0002] Nowadays, the lenses in optical lenses are developing in the direction of thinning and thinning. Commonly used lens materials include optical glass and optical resin; among them, optical glass has high cost, poor molding and processing performance, and poor water and heat resistance stability, which limits its use. Large-scale applications in optical lenses and lenses. In contrast, optical resin has the advantages of lower cost, easy processing and molding, and thinner and lighter, and has a broader application prospect. [0003] With the development of thinner and lighter electronic digital products, new requirements are put forward for the performance of optical resins, including refractive index, Abbe number and stability. Polycarbonate is an engineering plastic wi...

Claims

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Application Information

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IPC IPC(8): C08G64/30G02B1/04
CPCC08G64/307G02B1/041G02B1/04Y02E10/549
Inventor 赵欣黎雷靳少华曾伟王磊
Owner WANHUA CHEM GRP
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