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Polyamide resin composition

一种聚酰胺树脂、组合物的技术，应用在聚酰胺树脂组合物领域，能够解决降低磷原子浓度、没有公开等问题

Active Publication Date: 2008-06-25
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no description about the amino group reaction rate, and it is suggested that it is preferable to reduce the concentration of phosphorus atoms.
[0011] As described above, regarding the polyamide resin obtained from the diamine component mainly composed of m-xylylenediamine and the dicarboxylic acid component mainly composed of adipic acid, it is possible to simultaneously prevent yellowing and reduce gel or white spots. The target resin and its preparation method have not been disclosed yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-9

[0060] Embodiment 1-9, comparative example 1-5

[0061] Melt condensation of polym-xylylene adipamide

[0062]Add 1000 g of adipic acid (purity: 99.85% by mass) to a batch-type polymerization device with a stirrer, a partial condenser, a full condenser, a nitrogen gas introduction pipe, and a pressure-reducing regulating valve, and then add a prescribed amount of sodium hypophosphite and sodium acetate, and nitrogen replacement. Heat while flowing a small amount of nitrogen, stir and raise the temperature to 190°C. After the adipic acid was melted, 925 g of m-xylylenediamine (purity: 99.90% by mass) was continuously added dropwise for 2 hours under normal pressure. During the dropwise addition of m-xylylenediamine, the temperature in the polymerization device continued to rise to 250°C. The water distilled off while m-xylylenediamine is added dropwise is discharged out of the reaction system through a partial condenser and a total condenser. At this time, the maximum tempe...

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Abstract

A polyamide resin composition comprising: a polyamide (X) having a diamine constituent unit which mainly comprises a metaxylylenediamine unit and a dicarboxylate constituent unit which mainly comprises an adipate constituent unit; and specific amounts of a phosphate-type antioxidant and alkaline component. The polyamide (X) is characterized by a specific terminal group concentration balance and a specific amino group reaction rate. By using the polyamide resin composition, both of the prevention of yellow discoloration and the reduction of gelatinization or fisheye formation can be achieved.

Description

technical field [0001] The present invention relates to polyamide resin compositions used in bottles, sheets, films, fibers and the like. In particular, it relates to a compound that contains a diamine structural unit mainly composed of m-xylylenediamine units and a dicarboxylic acid structural unit mainly composed of adipic acid units, and has a specific range of end group balance and amino reaction. A high-rate polyamide, and a specific amount of phosphoric acid antioxidant and alkali components, can simultaneously achieve the purpose of preventing yellowing and reducing gel or white spots. Background technique [0002] Generally, polyamide resin is a polymer with low thermal stability that is easily oxidized. When heated in the presence of oxygen, it will turn yellow, and it will further turn black when subjected to a more severe thermal process. The polyamide resin that turns yellow loses the performance of the original polyamide, and of course its commercial value is v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K5/098C08G69/28C08K5/52
CPCC08L77/10C08G69/26C08K3/32C08K5/098C08L77/06C08G69/28C08K5/52
Inventor 田中一实菊地稔
Owner MITSUBISHI GAS CHEM CO INC
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