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Semi-aromatic polyamide resin composition and molded article obtained by molding same

A polyamide resin and semi-aromatic technology, which is applied in the field of semi-aromatic polyamide resin compositions, can solve the problems of poor surface appearance and reduced fluidity of the molded body, and achieves excellent molding processability and improved retention stability. Effect

Inactive Publication Date: 2016-10-12
UNITIKA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is known that when a semi-aromatic polyamide is used together with a certain amount or more of a fibrous reinforcing agent, the fluidity during molding decreases and the surface appearance of the obtained molded product deteriorates

Method used

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  • Semi-aromatic polyamide resin composition and molded article obtained by molding same
  • Semi-aromatic polyamide resin composition and molded article obtained by molding same
  • Semi-aromatic polyamide resin composition and molded article obtained by molding same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0152] 100 parts by mass of semi-aromatic polyamide (A-1), 1 part by mass of azine-based dye (C-1), and 0.5 part by mass of antioxidant (F-1) were dry-blended, and a weight loss compensation method was used. Type CE-W-1 type continuous quantitative supply device (manufactured by Kubota Corporation) is used for metering, and it is supplied to the main supply port of a co-rotating twin-screw extruder TEM26SS type (manufactured by Toshiba Machinery Co., Ltd.) with a screw diameter of 26mm and L / D50. Melt kneading is carried out. On the way, 20 parts by mass of the fibrous reinforcement (B-1) was supplied from the side feed port, and kneaded further. After being drawn into a thread form from a die, it was cooled and solidified in a water bath, and cut with a pelletizer to obtain semi-aromatic polyamide resin composition pellets. The barrel temperature of the extruder was set at (Tm+15° C.), the screw speed was 250 rpm, and the discharge rate was 25 kg / hour.

Embodiment 2～30

[0153] Examples 2-30, Comparative Examples 1-10

[0154] Except having changed the composition of the semi-aromatic polyamide resin composition as shown in Table 2, 3, operation similar to Example 1 was performed, and the semi-aromatic polyamide resin composition pellet was obtained.

[0155] Various evaluation tests were performed using the obtained semi-aromatic polyamide resin composition pellets. The results are shown in Tables 2 and 3.

[0156] [Table 2]

[0157]

[0158] [table 3]

[0159]

[0160] Since the resin compositions of Examples 1 to 30 satisfy the requirements of the present invention, the retention rate of tensile strength after 600 seconds of retention treatment is high, the retention stability is excellent, and the flow length of the strip-shaped fluid is long, and the load of the obtained molded article is high. High deflection temperature and excellent heat resistance, high tensile strength retention rate after heat treatment at 200°C×1000 hours,...

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Abstract

A semi-aromatic polyamide resin composition containing 100 parts by mass of a semi-aromatic polyamide (A), 20-110 parts by mass of a fibrous reinforcing material (B), and 0.1-5 parts by mass of an azine dye (C), wherein the semi-aromatic polyamide resin composition is characterized in that the semi-aromatic polyamide (A) has an aromatic dicarboxylic acid component, an aliphatic diamine component, and a monocarboxylic acid component as constituent components, the melting point is 300DEG C or higher, and the monocarboxylic acid component constituting the semi-aromatic polyamide (A) is an aliphatic monocarboxylic acid having a molecular weight of 200 or higher.

Description

technical field [0001] The present invention relates to a semi-aromatic polyamide resin composition which is excellent in surface appearance, heat resistance, fluidity, heat aging resistance, mechanical properties, and moldability, and has improved retention stability during melt processing. Background technique [0002] Semi-aromatic polyamides are widely used as molding materials because of their excellent heat resistance and mechanical properties. Among them, semi-aromatic polyamides with a melting point of 300°C or higher and high heat resistance and heat aging resistance are used in applications requiring high heat resistance such as automotive engine peripherals and LED lighting. [0003] It is known that when a semi-aromatic polyamide is used in combination with a certain amount or more of a fibrous reinforcing agent, the fluidity during molding decreases, and the surface appearance of the obtained molded article deteriorates. As a method of improving the surface app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K5/053C08K5/29C08K7/02
CPCC08K5/053C08K7/02C08L77/06C08K5/3475C08K5/0091C08K5/3495C08K5/0041C08K5/06C08K7/14C08L2201/08C08L2205/02
Inventor 竹谷丰三井淳一甘利太阳上川泰生椛岛洋平
Owner UNITIKA LTD
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