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Semi-aromatic polyamide resin

A technology of polyamide resin and aromatic dibasic acid, applied in the field of semi-aromatic polyamide resin, to achieve the effect of low water absorption and excellent chemical resistance

Inactive Publication Date: 2013-01-30
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the material is highly crystalline and crystallizes very quickly, it solidifies in the nozzle during the injection molding process, causing certain problems in processing

Method used

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  • Semi-aromatic polyamide resin
  • Semi-aromatic polyamide resin
  • Semi-aromatic polyamide resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] In a 3L autoclave, add 498.4g (3mol) terephthalic acid, 28.2g (0.32mol) 1,4-butanediamine, 465.3g (2.7mol) 1,10-decanediamine, 2.02 (0.09mol) benzene Formic acid, 2.02g (0.1wt% based on the total amount of raw materials) sodium hypophosphite monohydrate, 0.35L deionized water, nitrogen purging and then heating up. While stirring, the temperature was raised to 200° C. over about 2 hours, and the pressure inside the autoclave was raised to 2 MPa at this time. The reaction was continued under this condition for 2 hours, then the temperature was raised to 215° C., and kept under this condition for 2 hours, water vapor was slowly removed, and the reaction was carried out while maintaining the pressure at 2 MPa. Next, the pressure was lowered to 1 MPa over 1 hour, and the reaction was further carried out for 1 hour to obtain a prepolymer having a relative viscosity of 1.6.

[0066] The obtained prepolymer was dried under reduced pressure at 100°C for 20 hours, crushed to a p...

Embodiment 2

[0069] Repeat Example 1, except that the molar ratio of (2) DA4 unit to (1) DA10 unit is 20:80, the results are shown in Table 1.

Embodiment 3

[0071] Repeat Example 1, except that the molar ratio of (2) DA4 unit to (1) DA10 unit is 30:70, and the results are shown in Table 1.

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Abstract

The present invention discloses a semi-aromatic polyamide resin having good formability, and specifically relates to a biomass-based semi-aromatic polyamide which has good crystallinity, good heat resistance and low moisture absorption rate. The polyamide resin contains aliphatic diamine units (1) with the number of carbon atoms of 9-12, 1,4-butanediamine units (2), aliphatic diamine units (3) with the carbon atom number of more than 5 other than the units (1) and the units (2), terephthalic acid units (4), and aromatic dicarboxylic acid units (5) other than units (4). The copolymer has excellent physical and mechanical properties, and is not only used for engineering plastics, but also for other industrial materials and manufacturing materials for electrical and electronic equipment, and for automotive parts, office supplies and home supplies.

Description

technical field [0001] The invention relates to a semi-aromatic polyamide resin with good moldability, in particular to a semi-aromatic polyamide with good crystallinity, heat resistance, retention stability and low moisture absorption rate. Background technique [0002] Aliphatic polyamides, commonly used polyamides represented by nylon 6 and nylon 66, have excellent properties such as heat resistance, chemical resistance, rigidity, sliding properties, formability, etc., and exhibit extremely high toughness in a hygroscopic state. Therefore, it has been used in a wide range of applications such as automotive parts, electrical and electronic parts, and sliding parts. [0003] However, in the field of automotive parts, where polyamides have been commonly used in the past, the temperature inside the engine has increased due to the pursuit of high power of the automotive engine, and the heat resistance of resin parts such as chemical delivery pipes used inside and outside the e...

Claims

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Application Information

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IPC IPC(8): C08G69/26
Inventor 夏振新曹晓秀
Owner TORAY FIBER RES INST(CHINA) CO LTD