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Polycarbonate resin and manufacturing method

A technology of polycarbonate resin and diester carbonate, which is applied in the field of polycarbonate resin and manufacturing, can solve problems such as color tone deterioration, and achieve the effect of excellent mechanical strength, not easy to color, and remarkable effect

Active Publication Date: 2022-07-08
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polycarbonate resin obtained by using a monomer having no phenolic hydroxyl group as described above has a lower The color tone deteriorates during polymerization and molding, and as a result, the color tone further deteriorates when irradiated with ultraviolet rays or visible light.

Method used

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  • Polycarbonate resin and manufacturing method
  • Polycarbonate resin and manufacturing method
  • Polycarbonate resin and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0215] Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited to these examples. In the following Examples and Comparative Examples, the measurement method of each characteristic is as follows.

[0216] "Evaluation Method"

[0217] (1) Boric acid content

[0218] The quantification of boric acid was performed using the following apparatus and conditions. A standard curve was prepared quantitatively using a boric acid aqueous solution of a predetermined concentration. In addition, N.D. in a table|surface shows less than 1 ppm.

[0219] GC-MS analysis device: Agilent GC6890N, MSD5975B

[0220] Column: Agilent 19091S-433HP-5MS

[0221] Measurement conditions: flow rate 1mL / min, column oven 50~310℃, measurement time 60 minutes

[0222] Silanation method: 10 mg of a sample was dissolved in acetonitrile, 0.1 mL of pyridine and 0.1 mL of BSTFA (silanizing agent) were added, and 1 μL was injected into the ...

Embodiment A1

[0268] 490 parts of TMCB-A4 as raw materials and 728 parts of diphenyl carbonate (hereinafter, abbreviated as DPC) were used as catalysts in 5.9×10 -2 Parts of lithium acetate were heated to 180°C under nitrogen atmosphere and allowed to melt. Then, the decompression degree was adjusted to 13.4 kPa over 30 minutes. Then, the temperature was raised to 250° C. at a rate of 60° C. / hr, and the temperature was maintained for 10 minutes, and then the pressure reduction degree was reduced to 133 Pa or less in 1 hour. The reaction was carried out under stirring for a total of 6 hours, and after the reaction, it was discharged from the bottom of the reaction tank under nitrogen pressure, and was cut with a pelletizer while cooling in a water tank to obtain pellets. Various evaluations were performed on this particle, and Table 1 describes the evaluation results.

Embodiment A2

[0270] Various evaluations were performed in the same manner as in Example A1 except that TMCB-A3 was used as a raw material. The results are shown in Table 1.

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Abstract

The present invention provides a novel polycarbonate resin which is excellent in heat resistance and mechanical strength, is not easily colored during polymerization and molding, and is excellent in transparency and color tone. A polycarbonate resin containing a structural unit derived from a dihydroxy compound represented by the following formula (1), the dihydroxy compound represented by the formula (1) having a boric acid content of 100 ppm by weight or less and / or the tertiary amine content is 1000 ppm by weight or less, and further has a terminal phenyl group derived from the carbonic acid diester represented by the following formula (2), and the terminal phenyl group concentration is 30 μeq / g or more. (In formula (1), R 1 , R 2 , R 3 , R 4 Each independently represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, and a cycloalkoxy group having 6 to 20 carbon atoms. , an aryl group having 6 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an aryloxy group having 6 to 10 carbon atoms, an aralkoxy group having 7 to 20 carbon atoms, or a halogen atom. The cyclobutane ring represents any of a mixture of cis and trans isomers, a single cis isomer, and a single trans isomer) (in formula (2), R 5 , R 6 each independently a substituted or unsubstituted aromatic group)

Description

technical field [0001] The present invention relates to a polycarbonate resin excellent in weather resistance, heat resistance, transparency, color tone, and mechanical strength, a molded article, and a production method. Background technique [0002] Polycarbonate resin (hereinafter referred to as PC) is excellent in transparency, impact resistance, heat resistance, and dimensional stability, so it is used as an engineering plastic in electrical and electronic applications, automotive applications, building materials, furniture, musical instruments, miscellaneous goods, etc. used in a wide range of fields. In addition, compared with inorganic glass, the degree of freedom of processing shape is high, and integration of a plurality of components can be performed, and therefore, improvements in designability, weight reduction, and productivity of the vehicle body can be expected. [0003] However, when the conventional PC is exposed to sunlight for a long period of time, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G64/02C08G64/16
CPCC08G64/0216C08G64/305C08G64/1616C08G64/0208
Inventor 常守秀幸今里健太古野毅山中克浩
Owner TEIJIN LTD
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