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Copolycarbonate

一种共聚碳酸酯、碳原子数的技术，应用在共聚碳酸酯领域，能够解决异山梨醇含量少、耐热性低、分子量低等问题

Active Publication Date: 2016-01-13
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] On the other hand, polyesters of isosorbide and dicarboxylic acid have been proposed, but only polyesters containing a very small amount of isosorbide in the polymer or polyesters with low molecular weight can be obtained (Patent Documents 4 and 5)
In addition, copolymers of isosorbide and polylactic acid have been proposed, but only copolymers with low heat resistance have been obtained.
In addition, this copolymer is low in productivity because a polymer obtained by separately polymerizing isosorbide and lactic acid is reacted using a solvent (Patent Document 6)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0333] 436 parts of isosorbide (hereinafter referred to as ISS), 65 parts of 1,8-octanediol (hereinafter referred to as OD), 750 parts of diphenyl carbonate (hereinafter referred to as DPC) and 0.8×10 -2 Parts tetramethylammonium hydroxide and 0.6 x 10 -4 Parts of sodium hydroxide were heated to 180°C under a nitrogen atmosphere to melt it. Thereafter, the degree of reduced pressure was adjusted to 13.4 kPa over 30 minutes. Thereafter, 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 degree of reduced pressure was reduced to 133 Pa or less over 1 hour. The reaction was carried out under stirring for a total of 6 hours. After the reaction was completed, it was discharged from the bottom of the reaction tank under nitrogen pressure, and was cut with a granulator while cooling in a water tank to obtain pellets. The evaluation results are described in Table 1.

Embodiment 2

[0335] Except having used 441 parts of ISS, 66 parts of 1,9- nonanediol (it abbreviates as ND hereafter), and 750 parts of DPCs as a raw material, the operation completely the same as Example 1 was performed, and the same evaluation was performed. The results are described in Table 1.

Embodiment 3

[0337] Except having used 71 parts of 1, 10- decanediol (it abbreviates DD hereafter) instead of ND, it carried out completely the same operation as Example 2, and performed the same evaluation. The results are described in Table 1.

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Abstract

A copolycarbonate having a low water absorption coefficient and excellent heat resistance, low temperature characteristics and surface hardness. The copolycarbonate (Z) of the present invention contains a unit (A) represented by the following formula and a unit (B) represented by the following formula (B) as main recurring units, the (A / B n=1 ) molar ratio of the unit (A) and the unit (B n=1 ) being 40 / 60 to 99 / 1. The unit (B n=1 ) is a single unit constituting a block. (R 1 is an alkylene group or cycloalkylene group, all of which may be substituted by an aromatic group having 6 to 12 carbon atoms. R 2 is an alkylene group, cycloalkylene group or arylene group, all of which may be substituted by an aromatic group having 6 to 12 carbon atoms. r and s are each independently an integer of 0 to 4. l is 0 or 1. m is 0 or 1. n is an integer of 1 to 100.).

Description

[0001] The patent application of the present invention is a divisional application for the application dated April 18, 2013, the application number is 201380020840.8, and the invention name is "copolycarbonate". technical field [0002] The present invention relates to a copolycarbonate having a low water absorption rate, excellent heat resistance, low-temperature characteristics, and surface hardness. Background technique [0003] In recent years, due to concerns about the depletion of petroleum resources and the increase of carbon dioxide in the air causing global warming, carbon-neutral biomass resources that do not depend on petroleum as raw materials and do not increase carbon dioxide even if burned have attracted attention. In the field of polymers, biomass plastics produced from biomass resources are also actively developed. [0004] A representative example of biomass plastic is polylactic acid. Polylactic acid also has high heat resistance and mechanical properties...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/02C08G64/18C08G63/64
CPCC08G63/64C08G64/0208
Inventor 本吉哲也今里健太山中克浩
Owner TEIJIN LTD
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