Polyamide resin composition, and production method therefor
A technology of polyamide resin and composition, which is applied in the field of carbon black and copper compounds, and automotive interior and exterior parts, and can solve the problems of poor stability and elevation
Pending Publication Date: 2021-09-07
TOYOBO CO LTD
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- Application Information
AI Technical Summary
Problems solved by technology
When the polyamide resin composition contains more than 50% by mass of inorganic reinforcing materials, even if polycaprolactam resin (melting point is about 230°C) is used, the temperature of the cylinder during molding needs to be raised to a high temperature of 280°C to ensure molding When necessary fluidity, there is a problem of poor residence stability
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1～12
[0116] Examples 1-12, Comparative Examples 1-4
[0117] The copper compound is used in the form of an aqueous solution of copper bromide. With the composition shown in Tables 1 and 2, each raw material other than the inorganic reinforcing material was pre-mixed and put into the hopper of the twin-screw extruder, and each reinforcing material was put into the side feeding port of the twin-screw extruder. The compounding was carried out under the condition that the cylinder temperature of the twin-screw extruder was 280° C. and the screw rotation speed was 180 rpm to produce pellets. The obtained granules were dried with a hot air dryer until the moisture content was 0.05% or less, and then various properties were evaluated. Evaluation results are shown in Tables 1 and 2. The weather resistance test was performed with Examples 6-10 and the comparative example 4 containing (D) component and (E) component, and the comparative example 1 and the comparative example 1.
[0118] ...
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Abstract
The present invention is a polyamide resin composition comprising (A) a crystalline polyamide resin having a polycapramide resin as the main component, (B) a semi-aromatic non-crystalline polyamide resin, and (C) inorganic reinforcement materials. The polyamide resin composition contains (C-1) glass fiber, (C-2) acicular wollastonite, and (C-3) plate-shaped crystal inorganic reinforcement materials as the (C) inorganic reinforcement materials, has an (A):(B) mass ratio falling within a specific range, respective ingredient contents falling within specific ranges, and an amount of carboxyl group within the polyamide resin composition of less than 120 meq / kg. Even for continuous formation over a long time, with this polyamide resin composition, it is possible to obtain a formed product having excellent strength and rigidity, excellent external appearance on the surface (specular surface gloss, uniform textured surface properties, and the like), and also excellent weather resistance.
Description
technical field [0001] The present invention relates to a polyamide resin composition comprising, as main components, a polycaprolactam resin, a semi-aromatic amorphous polyamide resin, and an inorganic reinforcing material, and further comprising carbon black and a copper compound. In detail, the polyamide resin composition of the present invention can have excellent rigidity and / or strength even if it is continuously molded for a long time, and the molded product has a good surface appearance (mirror surface gloss, uniformity of texture surface, etc.), and further Has good weather resistance. It is especially suitable for automotive interior and exterior parts such as door mirror parts and console parts (console). Background technique [0002] General polyamide resins have excellent mechanical properties, heat resistance, impact resistance, and chemical resistance, and are widely used in automotive parts, motor parts, electronic parts, household goods and other fields. A...
Claims
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IPC IPC(8): C08K7/00C08K7/14C08L77/02C08L77/06C08J5/08C08K3/04C08K3/16
CPCC08L77/06C08L77/02C08K7/14C08K3/34C08K7/00C08K7/10C08K3/04C08K3/16C08K5/098C08J3/22C08L2205/025C08L2205/03
Inventor 吉村信宏梅木亮
Owner TOYOBO CO LTD