Polyamide resin, composition containing polyamide resin, and molded articles of polyamide resin and composition

A technology of polyamide resin and composition, which is applied in the field of polyamide resin, can solve the problems of poor melt retention stability and narrow melting point range, and achieve the effect of excellent melt retention stability

Inactive Publication Date: 2011-07-20
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This polyamide resin is composed of a combination unit (5T) of 1,5-pentamethylenediamine and terephthalic acid and a combination unit (6T) of 1,6-hexamethylenediamine and terephthalic acid. Compared to control the melting point, but there is a problem that the range of melting point that can be designed is narrow
[0004] In addition, Patent Documents 3 to 7 disclose polyamide resins mainly composed of 1,6-hexamethylenediamine and terephthalic acid and having excellent heat resistance, but there is a problem of poor melt retention stability.

Method used

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  • Polyamide resin, composition containing polyamide resin, and molded articles of polyamide resin and composition
  • Polyamide resin, composition containing polyamide resin, and molded articles of polyamide resin and composition
  • Polyamide resin, composition containing polyamide resin, and molded articles of polyamide resin and composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0097] The polyamide resins produced in Examples and Comparative Examples were evaluated by the following methods.

[0098] [Relative viscosity (ηr)]

[0099] In 98% sulfuric acid, the measurement was performed at a concentration of 0.01 g / ml at 25° C. using an Ostwald viscometer.

[0100] [Melting point (Tm), glass transition temperature (Tg)]

[0101] About 5 mg of a sample was taken using Robot DSC RDC220 manufactured by Seiko Instruments, and measured under the following conditions in a nitrogen atmosphere. The temperature (melting point: Tm 1), kept at a temperature 40°C higher than the melting point for 2 minutes, then cooled to 30°C at a cooling rate of 20°C / min, and kept at 30°C for 3 minutes. Next, the temperature (melting point: Tm 2 ) and heat (heat of fusion: ΔHm 2 ). In addition, for a sample quenched with liquid nitrogen from a molten state 30°C higher than the melting point of the polyamide resin, the middle point of the step-shaped endothermic peak of the...

reference example 1

[0112] Reference Example 1 (Preparation of Lysine Decarboxylase)

[0113] The cultivation of the Escherichia coli JM109 strain was carried out as follows. First, 1 platinum circle of the strain was inoculated into 5 ml of LB medium, and pre-cultured by shaking at 30° C. for 24 hours. Next, 50 ml of LB medium was added to a 500 ml Erlenmeyer flask, and steam sterilization was performed at 115° C. for 10 minutes in advance. The above-mentioned strains that had been pre-cultured were further inoculated in this medium, and cultured for 24 hours while adjusting the pH value to 6.0 with 1N hydrochloric acid aqueous solution under the conditions of an amplitude of 30 cm and 180 rpm. The bacterial cells thus obtained were collected, and a cell-free extract was prepared by ultrasonication and centrifugation. The activities of these lysine decarboxylases were measured according to the general method (Kenji Satoda, Haruo Mizono, Biochemical Experiment Lecture, vol. 11, P. 179-191 (1976...

reference example 2

[0114] Reference example 2 (production of 1,5-pentanediamine)

[0115] Prepare an aqueous solution with 50 mM lysine hydrochloride (manufactured by Wako Pure Chemical Industries), 0.1 mM pyridoxal phosphate (manufactured by Wako Pure Chemical Industries), 40 mg / L-roughly purified lysine decarboxylase (prepared in Reference Example 1) 1000 ml of the obtained aqueous solution was reacted at 45° C. for 48 hours while maintaining the pH at 5.5 to 6.5 with 0.1 N aqueous hydrochloric acid solution, thereby obtaining 1,5-pentanediamine hydrochloride. 1,5-Pentanediamine hydrochloride was converted into 1,5-pentanediamine by adding sodium hydroxide to this aqueous solution, extracted with chloroform, and distilled under reduced pressure (10 mmHg, 60°C) to obtain 1 , 5-pentanediamine.

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Abstract

Disclosed is a polyamide resin which is produced by the polycondensation of (A) pentamethylenediamine, (B) terephthalic acid and / or a derivative thereof, and (C) at least one compound selected from adipic acid, azelaic acid, sebacic acid, undecanedioic acid, dodecanedioic acid, isophthalic acid, 1,9-diaminononane, 1,10-diaminodecane, 1,11-diaminoundecane, 1,12-diaminododecane, caprolactam, undecalactam, laurolactam, aminocaproic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid, and derivatives of these compounds. In the polyamide resin, the ratio of a repeating unit derived from the component (C) is 10 to 50 wt% (inclusive) relative to the total weight of the polymer. A solution of the polyamide resin in 98% sulfuric acid, which contains the polyamide resin at a concentration of 0.01 g / ml, has a relative viscosity of 1.5 to 4.5 at 25 DEG C.

Description

technical field [0001] The present invention relates to a polyamide resin containing 1,5-pentamethylenediamine, terephthalic acid, and derivatives thereof as essential components and excellent in heat resistance and melt retention stability, a polyamide resin composition, and molded articles thereof. Background technique [0002] As a non-petroleum raw material, 1,5-pentanediamine is expected to be used as a synthetic raw material such as pharmaceutical intermediates and / or as a polymer raw material, and its demand has increased in recent years. Patent Document 1 discloses a polypentamethylene adipamide resin. [0003] On the other hand, Patent Document 2 discloses a polyamide resin mainly composed of an aliphatic diamine based on 1,5-pentanediamine and 1,6-pentanediamine and a terephthalic acid derivative. Hexamethylenediamine is the main ingredient. This polyamide resin is composed of a combination unit (5T) of 1,5-pentamethylenediamine and terephthalic acid and a combin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/00C08K3/00C08K9/04C08L77/00
CPCC08K7/28C08G69/265C08L77/06C08G69/36
Inventor 加藤公哉秋田大松冈英夫
Owner TORAY IND INC
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