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Polycarbonate resin and method for producing same

A technology of polycarbonate resin and manufacturing method, which is applied in optics, instruments, optical components, etc., and can solve the problems of low surface energy, high polarity, and non-wear resistance of polycarbonate resin

Inactive Publication Date: 2012-09-26
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, polycarbonate resins containing isosorbide contain a large number of oxygen atoms, and are more polar than polycarbonate resins obtained from diols without ether moieties such as PC-A.
Therefore, the polycarbonate resin containing isosorbide has a higher hygroscopicity than PC-A, and has the disadvantage of easily causing a decrease in the dimensional stability of the molded product due to moisture absorption and a decrease in heat resistance during humid heat.
In addition, polycarbonate resins containing isosorbide have the disadvantages of low surface energy, easy contamination of molded products, and lack of wear resistance.

Method used

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  • Polycarbonate resin and method for producing same
  • Polycarbonate resin and method for producing same
  • Polycarbonate resin and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0272] 731 parts by weight (5.00 moles) of isosorbide, 2206 parts by weight (10.30 moles) of diphenyl carbonate, 1141 parts by weight (5.00 moles) of 2,2-bis(4-hydroxyphenyl) propane and 81 parts by weight of stearyl alcohol Parts by weight (0.30 moles) were added to the reactor as a polymerization catalyst, and 1.0 parts by weight of tetramethylammonium hydroxide (1×10 per mole of diphenyl carbonate component) was added. -4 mol) and NaOH 0.9×10 -3 Parts by weight (relative to 1 mole of diphenyl carbonate component is 0.2×10 -6 mol), melted at 180°C under a nitrogen atmosphere.

[0273] Under stirring, slowly reduce the pressure in the reaction tank over 30 minutes, and reduce the pressure to 13.3×10 while distilling off the generated phenol. -3 MPa. After reacting in this state for 20 minutes, after raising the temperature to 200°C, the pressure was reduced slowly over 20 minutes, and the phenol was distilled off at 4.00×10 -3 MPa was reacted for 20 minutes, then the temp...

Embodiment 2

[0276] Add 906 parts by weight (6.20 moles) of isosorbide, 868 parts by weight (3.80 moles) of 2,2-bis(4-hydroxyphenyl) propane and 122 parts by weight (0.40 moles) of pentadecylphenol with a thermometer, After replacing the reactor with nitrogen, 8,900 parts by weight of pyridine and 32,700 parts by weight of methylene chloride, which had been sufficiently dried in advance, were added and dissolved. Under stirring, 1420 parts by weight (14.30 mol) of phosgene was blown in at 20°C over 100 minutes. After blowing in phosgene, stirring was continued for about 20 minutes as it was, and the reaction was terminated. After the reaction, the product was diluted with dichloromethane, neutralized with hydrochloric acid to remove pyridine, washed with water repeatedly until the conductivity became almost the same as that of ion-exchanged water, and then dichloromethane was evaporated to obtain a powder. The obtained powder was melt-extruded, and the thread was cut to obtain pellets. T...

Embodiment 3

[0278] Using 1242 parts by weight (8.50 moles) of isosorbide, 402 parts by weight (1.50 moles) of 1,1-bis(4-hydroxyphenyl)cyclohexane, 2185 parts by weight (10.20 moles) of diphenyl carbonate and 1-hexane Except the alcohol being 61 parts by weight (0.60 mol), polymerization was carried out in the same manner as in Example 1 to obtain particles. The specific viscosity of the obtained granules was 0.32. Table 1 shows other evaluation results.

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Abstract

Disclosed is a polycarbonate resin which has high biogenic matter content. The polycarbonate resin exhibits excellent moisture absorption resistance, heat resistance, thermal stability and moldability, while having high surface energy. Specifically disclosed is a polycarbonate resin which contains 30-100% by mole of a unit represented by formula (1) in the entire main chain, while satisfying (i) the biogenic matter content thereof as determined in accordance with ASTM D6866 05 is 25-100%, (ii) the specific viscosity at 20 DEG C of a solution that is obtained by dissolving 0.7g of the resin in 100 ml of methylene chloride is 0.2-0.6, and (iii) the OH value thereof is 2.5 103 or less. Also specifically disclosed is a method for producing the polycarbonate resin.

Description

technical field [0001] This invention relates to polycarbonate resins. Furthermore, it relates to the polycarbonate resin containing the repeating unit derived from the carbohydrate which is a biological origin substance in more detail, and being excellent in moisture-absorption resistance, heat resistance, heat stability, and molding processability. Background technique [0002] Polycarbonate resin is a polymer in which aromatic or aliphatic dihydroxy compounds are linked by carbonate, among which polycarbonate resin obtained from 2,2-bis(4-hydroxyphenyl)propane (commonly known as bisphenol A) (hereinafter sometimes referred to as "PC-A") has excellent transparency, heat resistance, and impact resistance, and is used in many fields. [0003] Generally, polycarbonate resins are produced using raw materials derived from petroleum resources, but there is a demand for polycarbonate resins using raw materials derived from biologically derived substances such as plants due to co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/14C08J5/18
CPCC08J2369/00C08J5/18G02B1/04C08G64/0208C08G64/0216C08L69/00
Inventor 木下真美斋藤瑞穗近藤史崇
Owner TEIJIN LTD
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