Polyamide resin composition

A technology of polyamide resin and composition, which is applied in the field of polyamide and resin composition containing other polyamides as needed, and can solve the problems of increased gel and low commodity value

Active Publication Date: 2009-05-13
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the concentration of phosphorus atoms in the polymerization system is low, in order to obtain a sufficient molecular weight, the polymerization reaction time is prolonged, the polymer is oxi

Method used

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  • Polyamide resin composition
  • Polyamide resin composition
  • Polyamide resin composition

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0088] The method for producing the multilayer structure is not particularly limited, and known techniques can be used. For example, after being formed into a film by a co-extrusion method, it is processed into various containers. As the coextrusion method, known methods such as a T-die method and an expansion method can be used. In addition, it is also possible to blow mold a multilayer bottle after preparing a multilayer preform by injection molding. When the polyamide resin composition of the present invention is used as a barrier layer, it is preferable because the effect of preventing air bubbles from entering and the effect of preventing whitening are good, and the productivity and transparency are good when preparing a multilayer preform by injection molding.

[0089] In the preparation of a multilayer structure using the polyamide resin composition of the present invention as a barrier layer, for nylon or polyolefin, slow compression, sudden compression type, single f...

Embodiment 1

[0134] (melt polymerization of polyamide)

[0135] Add accurately weighed 15000 g (102.6 mol) to a reaction vessel with an inner volume of 50 liters having a stirrer, a partial condenser, a total condenser, a thermometer, a dropping funnel, and a nitrogen inlet tube, and a strand die Adipic acid, 5.174g (0.0488mol) of sodium hypophosphite, and 2.803g (0.0342mol) of sodium acetate were fully replaced with nitrogen, then stirred inside the system under a small amount of nitrogen flow, and heated to 170°C at the same time. Then, 13,974 g (102.6 mol) of m-xylylenediamine was added dropwise under stirring, and the generated condensation water was discharged out of the system while the temperature inside the system was continuously raised. After completion of m-xylylenediamine dropwise addition, the internal temperature was made 260° C., and the reaction was continued for 40 minutes. Then, the inside of the system was pressurized with nitrogen, the polymer was taken out from the st...

Embodiment 2

[0143] Except using 12.953g (0.1220mol) sodium hypophosphite, 7.008g (0.0854mol) sodium acetate, same as embodiment 1, carry out melt polymerization and solid state polymerization, obtain relative viscosity and be 2.6, b * Polyamide 2 with a value of -2.0. In addition, the time during which the particle temperature was maintained at 200° C. was 20 minutes.

[0144] Then, with respect to the polyamide 2 of 20kg, add 7.6g (0.0126mol) calcium stearate, stir and mix in the tumbler for 10 minutes, obtain polyamide resin composition 2, same as embodiment 1, carry out counting of white spot, resin Observation of changes in pressure and observation of coloring conditions. The results are shown in Table 1-3.

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Abstract

Disclosed is a polyamide resin composition comprising a resin component containing at least a polyamide (X) and a fatty acid metal salt having 10-50 carbon atoms. This polyamide resin composition may optionally contain an additive (A) and/or an additive (B). The polyamide (X) is obtained by melt polycondensation of a diamine component containing not less than 70 mol% of meta-xylylenediamine and a dicarboxylic acid component containing not less than 70 mol% of an alpha,omega-linear aliphatic dicarboxylic acid. The additive (A) is composed of one or more compounds selected from the group consisting of diamide compounds obtained from a fatty acid having 8-30 carbon atoms and a diamine having 2-10 carbon atoms, diester compounds obtained from a fatty acid having 8-30 carbon atoms and a diol having 2-10 carbon atoms, and surface active agents. The additive (B) is composed of one or more compounds selected from the group consisting of metal hydroxides, metal acetates, metal alkoxides, metal carbonates, and fatty acids.

Description

technical field [0001] The present invention relates to a polyamide containing a m-xylylene group in its main chain and a resin composition containing other polyamides as needed. Specifically, the present invention relates to a polyamide resin composition that has a good color tone, less gel, and can be melt-extruded stably for a long period of time. Background technique [0002] For packaging materials such as food and beverages, in order to protect the contents during distribution, refrigerated storage, and heat sterilization, etc., not only strength, unbreakability, and heat resistance are required, but also transparency that can confirm the contents is required. Excellent performance and many other aspects. In addition, in recent years, performances such as oxygen barrier properties, carbon dioxide barrier properties, and barrier properties against various aroma components have been further required to prevent the intrusion of oxygen from the outside in order to suppres...

Claims

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Application Information

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IPC IPC(8): C08L77/06B32B27/32B32B27/34C08K5/098
Inventor 大滝良二三田寺淳加藤智则神田智道
Owner MITSUBISHI GAS CHEM CO INC
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