Method for manufacturing polycarbonate resin, polycarbonate resin, and methods for manufacturing polycarbonate-resin film and polycarbonate-resin pellets

A technology of polycarbonate resin and manufacturing method, which is applied in the field of polycarbonate resin, can solve problems such as increased pressure loss, filter damage, and resin deterioration, and achieve the effects of less foreign matter, excellent mechanical strength, and excellent hue

Active Publication Date: 2013-12-25
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] Therefore, if it is desired to filter at a temperature that does not cause decomposition of the polycarbonate resin, there is a problem that the pressure loss in the filter becomes large due to too high a viscosity, resulting in the loss of the filter due to the high viscosity. Breakage, or resin deterioration due to shear heat generation during filtration

Method used

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  • Method for manufacturing polycarbonate resin, polycarbonate resin, and methods for manufacturing polycarbonate-resin film and polycarbonate-resin pellets
  • Method for manufacturing polycarbonate resin, polycarbonate resin, and methods for manufacturing polycarbonate-resin film and polycarbonate-resin pellets
  • Method for manufacturing polycarbonate resin, polycarbonate resin, and methods for manufacturing polycarbonate-resin film and polycarbonate-resin pellets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0377] (Phase 1 Response)

[0378]The molar ratio of ISB / TCDDM / DPC is 70 / 30 / 100 in a polymerization reactor equipped with a heat medium jacket and stirring paddle with oil as a heat medium, a distillation pipe connected with a vacuum pump, and a condenser, and then added Make the cesium carbonate of aqueous solution, make every 1 mol reach 2.5×10 relative to all dihydroxy compounds -6 mol (converted into cesium metal atoms), and then sufficient nitrogen substitution (oxygen concentration 0.0005% by volume to 0.001% by volume) was carried out. At this time, the DPC used was distilled and purified so that the concentration of chloride ions was 10 ppb or less. Next, the heated heat medium is circulated through the heat medium jacket of the reactor, and stirring is started when the reaction solution (i.e., the internal temperature) reaches 100° C., and the internal temperature is kept at 100° C. to melt the contents and reach 100° C. uniform.

[0379] Thereafter, the temperatur...

Embodiment 2

[0394] It operated similarly to Example 1 except having made the resin supply rate to an extruder 15 kg / h, and having made the screw rotation speed 130 rpm. The temperature of the polycarbonate resin discharged from the die was 264° C., the reduced viscosity was 0.334, the YI of the pellets was 63.2, the phenol content was 476 ppm, and the DPC content was 27 ppm.

Embodiment 3

[0396] It carried out similarly to Example 1 except having set the resin supply rate to an extruder to 20 kg / h, and the screw rotation speed to 150 rpm. The temperature of the polycarbonate resin discharged from the die was 269° C., the reduced viscosity was 0.328, the YI of the pellets was 65.6, the phenol content was 482 ppm, and the DPC content was 29 ppm.

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Abstract

The present invention relates to a polycarbonate-resin manufacturing method whereby a polycarbonate resin that contains little foreign material and exhibits excellent thermal stability, hue, and mechanical strength is manufactured efficiently and stably.

Description

technical field [0001] The present invention relates to a method for efficiently and stably producing a polycarbonate resin that is excellent in thermal stability, hue, and mechanical strength and has few foreign substances. Background technique [0002] Polycarbonate resin usually uses bisphenols as a monomer component, and effectively utilizes its advantages in transparency, heat resistance, or mechanical strength. It is used in electrical and electronic components, automotive components, optical recording media, and lenses. etc. have been widely used as so-called engineering plastics. [0003] However, in the application of optical compensation films such as flat panel displays which are rapidly spreading recently, higher optical properties such as low birefringence and low photoelastic coefficient are required, and conventional aromatic polycarbonates containing bisphenols as monomer components As far as ester resin is concerned, it cannot meet this requirement. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B13/10B29B9/06B29B9/12C08J3/12C08J5/18B29K69/00
CPCC08G64/305B29B9/06B29B9/12B29B13/10C08J3/12C08J5/18
Inventor 横木正志金政智亮白石义隆并木慎悟永尾刚一山本正规
Owner MITSUBISHI RAYON CO LTD
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