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

A technology of polycarbonate resin and manufacturing method, which is applied in the field of polycarbonate resin, and can solve the problems of resin deterioration and high melt viscosity

Inactive Publication Date: 2013-12-18
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, if a polycarbonate resin having a fluorene structure is to be filtered with a filter in a molten state, there is a problem that the melt viscosity is too high and the resin deteriorates due to shear heat generation during filtration.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0417] In the raw material preparation tank fully subjected to nitrogen substitution (oxygen concentration 0.0005% to 0.001% by volume), a certain amount of raw material is continuously supplied to the first polymerization reactor, and at the same time, it is continuously fed through the catalyst supply pipe connected to the raw material supply pipe. Supply the magnesium acetate tetrahydrate that has been made into the aqueous solution so that it reaches 19×10 per 1 mol of all dihydroxy compounds. -6 mol (converted into magnesium metal atoms), the raw material is prepared in such a way that the molar ratio of BHEPF / ISB / PEG (average molecular weight 1000) / DPC is 43.2 / 55.6 / 1.2 / 99, and the first polymerization reactor has : Heat medium jacket with oil as heat medium, heat medium internal coil, stirring paddle, distillation tube connected with vacuum pump, and condenser.

[0418] After the raw material and the aqueous catalyst solution are mixed in the piping, two pleated cylindri...

Embodiment 2

[0433]The raw material is prepared in such a way that the molar ratio of BHEPF / ISB / PEG (average molecular weight is 1000) / DPC is 40.3 / 59.4 / 0.3 / 99, the inner temperature of the first polymerization reactor is 194°C, the pressure is 27.8kPa, and the second The internal temperature of the dipolymerization reactor is 208°C and the pressure is 25.8kPa, so that the internal temperature of the third polymerization reactor is 221°C and the pressure is 23.0kPa, so that the internal temperature near the entrance of the fourth polymerization reactor is 225°C and the outlet The nearby internal temperature is 239°C and the pressure is 1.3kPa, and the screw speed of the extruder, the polycarbonate resin extrusion amount / the cross-sectional area of ​​the extruder barrel, the heater setting temperature of the filter, and the filter surface Except that the linear velocity of the molten resin above was changed as shown in Table 1, it was carried out in the same manner as in Example 1. The analy...

Embodiment 3

[0435] For the setting of the heater temperature of the barrel of the extruder, set the 4 upstream components to 240°C, set the 6 downstream components to 220°C, set the screw speed of the extruder, the heater of the filter Except having changed the preset temperature and the heater preset temperature of a die|dye as shown in Table 1, it carried out similarly to Example 2. The analytical values ​​are shown in Table 1.

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Abstract

The present invention relates to a polycarbonate-resin manufacturing method whereby polycarbonate-resin pellets or polycarbonate-resin films that contain little foreign material and exhibit excellent optical properties, thermal stability, hue, and mechanical strength are 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 such as transparency, heat resistance, and mechanical strength, and is used as a so-called Engineering plastics are widely used. [0003] However, in applications such as retardation films such as flat panel displays and lens applications that are rapidly spreading recently, higher optical characteristics such as low birefringence and low photoelastic coefficient are required. As far as polycarbonate resin is concerned, it cannot meet this requirement. [0004] In recent years, polycarbonate resins using dihydroxy compounds having a fluorene structure as monomers have been proposed, and their application to retardati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B13/10B29B9/02B29B9/06C08G64/16C08J5/18B29K69/00B29L7/00
CPCC08G64/307C08J5/18C08J2369/00B29B9/02B29B9/06B29B13/10C08G64/16
Inventor 横木正志并木慎悟永尾刚一山本正规
Owner MITSUBISHI CHEM CORP
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