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Optical use polycarbonate resin composition, method for producing same, and spectacle lens and camera lens containing same

一种聚碳酸酯树脂、树脂组合物的技术，应用在眼镜/护目镜、光学、光学元件等方向，能够解决制造成本高等问题

Active Publication Date: 2019-01-04
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in these methods, since expensive bisphenols are used as the target of the copolymerization, the production cost is high, and they may not be accepted in the lens market where price reduction is being promoted.

Method used

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  • Optical use polycarbonate resin composition, method for producing same, and spectacle lens and camera lens containing same
  • Optical use polycarbonate resin composition, method for producing same, and spectacle lens and camera lens containing same
  • Optical use polycarbonate resin composition, method for producing same, and spectacle lens and camera lens containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0053] Hereinafter, although an Example and a comparative example are given and this invention is demonstrated concretely, this invention is not limited to these Examples.

[0054]

[0055] Using an Abbe refractometer manufactured by Atago Co., Ltd., at 20° C., the refractive index ( ne), the refractive index (nd) of d line (587.6nm). In addition, the refractive index (nF') of the F' line (488 nm) and the refractive index (nC') of the C' line (643.9 nm) were measured, and the Abbe's number (νe) was calculated from the following formula (3).

[0056] Abbe's number (νe) = (ne-1) / (nF'-nC')...Formula (3)

[0057]

[0058] Using a Gaohua flow tester (manufactured by Shimadzu Corporation), at a temperature of 280 ° C and a pressure of 15.69 MPa, the amount of molten resin flowing out from a nozzle hole (Orifice) with a diameter of 1 mm x a length of 10 mm (unit: × 10 - 2 cm 3 / second).

[0059]

[0060] The intrinsic viscosity of a 0.5% by mass / volume solution of dichloro...

Synthetic example 1

[0068] 34 liters of 8.0 mass / mass % sodium hydroxide aqueous solution was added to 100 liters of reaction containers, 5.8 kg of BPAP (manufactured by Honshu Chemical Industry Co., Ltd., 20 mol) and 10 g of sodium dithionite were added and dissolved. 22 liters of dichloromethane was added thereto, and 2.6 kg of phosgene was bubbled in over 30 minutes while maintaining stirring at 15°C.

[0069] After the aeration finishes, stir vigorously for 1 minute to emulsify the reaction solution, add 100 g of p-tert-butylphenol (hereinafter referred to as PTBP, 0.67 mol), stir for 10 minutes, add 20 ml of triethylamine, and continue stirring for 50 minutes to make its aggregation.

[0070] The polymerization liquid is separated into an aqueous phase and an organic phase, the organic phase is neutralized with phosphoric acid, and washed repeatedly until the conductivity of the washing liquid reaches below 10 μS / cm to obtain a refined polymer resin liquid. The concentration of the obtained...

Synthetic example 2

[0073] Polymerization and purification were performed in the same manner as in Synthesis Example 1 except that PTBP was changed to 140 g (0.93 mol). The intrinsic viscosity of the obtained resin (AP-PC) was 0.355 dL / g. The obtained resin liquid was diluted with dichloromethane, and the density|concentration was adjusted to 10 mass / mass %.

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Abstract

The present invention addresses the problem of providing an optical use polycarbonate resin composition which exhibits good fluidity, has a high refractive index, is inexpensive and exhibits impact resistance. This problem can be solved by an optical use polycarbonate resin composition that contains a polycarbonate resin (A) which contains a constituent unit represented by formula (1) and has an intrinsic viscosity of 0.320-0.630 dL / g, and polycarbonate resin (B) which contains a constituent unit represented by formula (2) and has an intrinsic viscosity of 0.320-0.600 dL / g, wherein the polycarbonate resin that contains a constituent unit represented by formula (2) is contained at a proportion of 45-75 mass%.

Description

technical field [0001] The present invention relates to a polycarbonate resin composition for optics and a method for producing the same. Background technique [0002] Polycarbonate resins are excellent in transparency, impact resistance, heat resistance, dimensional stability, etc., and are used in various fields as general-purpose engineering plastics. In particular, it is often used in the optical field by taking advantage of its excellent transparency. [0003] Common polycarbonate resins are derived from bisphenol A (hereinafter abbreviated as BPA), and are used as optical lenses because of their relatively high refractive index (nD, 1.59). Mainly in North America, it is used as a lens for eyeglasses. (Non-Patent Document 1) [0004] For example, in the spectacle lens industry in Japan, a lens with a refractive index (ne) lower than 1.60 is treated as a medium-refractive lens with a thick lens thickness. High-refractive-index lenses increase added value. [0005] A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00G02B1/04G02C7/00
CPCC08L69/00G02B1/041G02B1/04G02C7/02C08L2205/025C08G64/06C08G64/24C08G64/307G02C7/00
Inventor 小川典庆
Owner MITSUBISHI GAS CHEM CO INC