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Polycarbonate resin

A polycarbonate resin, carbon number technology, applied in the field of new terminal modified polycarbonate resin, can solve the problems of low activity of reactive groups and unsuitability, and achieve the effect of excellent ultraviolet absorption ability

Active Publication Date: 2021-11-12
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although these ultraviolet absorbers exhibit excellent weather resistance, they have low activity as reactive groups, and are not suitable as raw materials for the production of block copolymers with other resins or reactive resin modification materials.

Method used

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  • Polycarbonate resin
  • Polycarbonate resin
  • Polycarbonate resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0095] Hereinafter, although an Example demonstrates this invention, this invention is not limited to these Examples.

[0096]

[0097] A terminal-modified polycarbonate resin was produced according to the method described below, and the viscosity-average molecular weight (Mv), 330 nm transmittance, and infrared absorption (IR) spectrum of the obtained resin were analyzed.

[0098]

[0099] 100 g of bisphenol A (BPA) manufactured by NIPPON STEEL Chemical & Material Co., Ltd. and 0.5 g of dithionite were added to 600 ml of 9 w / w % sodium hydroxide aqueous solution and 200 ml of pure water, and dissolved. 330 ml of dichloromethane was added thereto, and 59.7 g of phosgene was blown in over 30 minutes while the temperature of the solution was kept in the range of 15 to 25°C while stirring.

[0100] After the blowing of phosgene was completed, 100ml of 9w / w% sodium hydroxide aqueous solution, 200ml of dichloromethane, 3.3g of RUVA-93 (terminator A) manufactured by Otsuka Chemi...

Embodiment 2

[0106] It synthesized similarly to Example 1 except having changed BPA into Honshu Chemical Industry Co., Ltd. bisphenol AP 87g, and changed terminal terminator A into 3.2g.

[0107]

[0108] (analysis results)

[0109] The Mv is 27,200, and the transmittance at 330nm is 0.1%. As in Example 1, it was confirmed from the IR spectrum that it entered the terminal.

Embodiment 3

[0111] Synthesis was carried out in the same manner as in Example 1, except that BPA was changed to 90 g of bisphenol Z manufactured by Honshu Chemical Industry Co., Ltd., and the terminal terminator A was changed to 3.6 g.

[0112]

[0113] (analysis results)

[0114] The Mv is 22,300 and the transmittance at 330nm is 0.1%. As in Example 1, it was confirmed from the IR spectrum that it entered the terminal.

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Abstract

The present invention provides a terminally modified polycarbonate resin that has ultraviolet absorbing capability. More specifically, the present invention provides a terminally modified polycarbonate resin which has a structure represented by general formula (A) and a constituent unit that is derived from a dihydric phenol. (In general formula (A), R1 represents a hydrogen atom or an alkyl group having 1-6 carbon atoms; R2 represents an alkylene group having 1-6 carbon atoms; R3 represents a hydrogen atom or a methyl group; R4 represents a hydrogen atom or a halogen atom; and * represents the bonding position to the main chain of the polycarbonate resin.).

Description

technical field [0001] The present invention relates to a novel end-modified polycarbonate resin. Background technique [0002] As polycarbonates having terminal reactivity, there are polycarbonates having vinyl terminals or conjugated double bonds (Patent Documents 1 and 2). These have ultraviolet absorbing properties, but because of their high reactivity, they react and polymerize even against ultraviolet rays outside the house, and have the disadvantage of losing activity and gradually losing their function as ultraviolet absorbers. In addition, a polycarbonate having a triazole or benzophenone-type ultraviolet absorber at the end is known (Patent Document 3). However, although these ultraviolet absorbers exhibit excellent weather resistance, they have low activity as reactive groups and are not suitable as raw materials for producing block copolymers with other resins or as reactive resin modifying materials. [0003] As the terminal-modified polycarbonate resin, there...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/14
CPCC08G64/14C08G64/045C08G64/12C08G64/24C08G64/42C07D249/20C08G64/00
Inventor 石川骏小川典庆
Owner MITSUBISHI GAS CHEM CO INC
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