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Polyamide composition and molded article

A polyamide composition and polyamide technology, applied in the direction of semiconductor devices, mirrors, electrical components, etc., can solve the problems of difficulty in obtaining molded products with sufficient characteristics, polyamide thermal decomposition, etc., and achieve excellent light discoloration resistance and extrusion processing excellent effect

Active Publication Date: 2015-09-23
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, PA6T is a high-melting polyamide with a melting point of about 370°C. Therefore, there is a problem that even if a molded product is obtained from PA6T by melt molding, thermal decomposition of the polyamide will occur during the molding process, making it difficult to obtain a polyamide with sufficient characteristics. Formed product

Method used

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  • Polyamide composition and molded article
  • Polyamide composition and molded article
  • Polyamide composition and molded article

Examples

Experimental program
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Effect test

Embodiment

[0242] Hereinafter, the present invention will be explained more specifically through examples and comparative examples, but the present invention is not limited to these examples.

[0243] The raw materials and measurement methods used in the examples and comparative examples are as follows. It should be noted that in this embodiment, 1kg / cm 2 Indicates 0.098MPa.

[0244] [Raw materials]

[0245] "Polyamide (A)"

[0246] The polyamide (A) used in the present example and the comparative example is produced by appropriately using the following dicarboxylic acid constituting the dicarboxylic acid unit (a) and diamine constituting the diamine unit (b).

[0247]

[0248] (1) 1,4-Cyclohexanedicarboxylic acid (hereinafter also referred to as "CHDA") (manufactured by Eastman Chemical Company, trade name: 1,4-CHDA HP grade (trans isomer / cis isomer = 25 / 75))

[0249] (2) Terephthalic acid (manufactured by Wako Pure Chemical Industries, Ltd.)

[0250]

[0251] (b1) 2-Methylpentamethylene diamine (...

manufacture example 1

[0298] 1,4-Cyclohexanedicarboxylic acid (CHDA) 896g (5.20 moles) and 2-methyl pentamethylene diamine (2MC5DA) 604g (5.20 moles) were dissolved in 1500g of distilled water to prepare equimolar A 50% by mass water mixture of raw material monomers. The obtained water mixture and 21 g (0.18 mol) of 2MC5DA as an additive at the time of melt polymerization were put into an autoclave having an internal volume of 5.4 L (manufactured by Nitto High Pressure). Then, heating was performed until the liquid temperature (internal temperature) in the autoclave reached 50°C. Then the inside of the autoclave was replaced with nitrogen. Continue heating until the pressure in the tank of the autoclave (hereinafter sometimes referred to as "in the tank") is about 2.5kg / cm in gauge (hereinafter, the pressure in the tank is all expressed as gauge pressure) 2 (At this time, the liquid temperature is about 145°C). In order to keep the pressure in the tank at about 2.5kg / cm 2 , The water is removed fr...

manufacture example 2

[0302] Dissolve CHDA 782g (4.54 mol), 1,9-nonamethylene diamine (C9DA) 575 g (3.63 mol) and 2-methyl octamethylene diamine (2MC9DA) 144 g (0.91 mol) in 1500 g of distilled water , Thereby preparing a 50% by mass water mixture in which equimolar raw material monomers are dissolved. The obtained water mixture and 11 g (0.07 mol) of C9DA as an additive at the time of melt polymerization were put into an autoclave having an internal volume of 5.4 L (manufactured by Nitto High Pressure). Then, heating was performed until the liquid temperature (internal temperature) in the autoclave reached 50°C. Then the inside of the autoclave was replaced with nitrogen. Continue heating until the pressure in the tank of the autoclave reaches about 2.5kg / cm in gauge 2 (At this time, the liquid temperature is about 145°C). In order to keep the pressure in the tank at about 2.5kg / cm 2 , Remove the water to the outside of the system while continuing to heat, until the solute concentration of the aq...

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Abstract

The purpose of the invention is to provide a polyamide composition having excellent whiteness, reflow resistance, heat discoloration resistance, light discoloration resistance, and extrusion processability. A polyamide composition containing: a polyamide (A) having a dicarboxylic acid unit (a) and a diamine unit (b); 20-70 mass% of titanium oxide (B); and 0.5-7.5 mass% of a phosphorus-based compound (C).

Description

Technical field [0001] The present invention relates to a polyamide composition and a molded article containing the polyamide composition. Background technique [0002] Polyamides represented by polyamide 6 (hereinafter also referred to as "PA6") and polyamide 66 (hereinafter also referred to as "PA66") are excellent in molding processability, mechanical properties, or chemical resistance, so they are used for automobiles , Electrical and electronic, industrial materials, industrial materials, daily and household products, and other parts materials are widely used. [0003] As a measure for the environment in the automotive industry, the weight of the car body is required to reduce exhaust gas. In order to meet this requirement, polyamide is increasingly used instead of metal as exterior and interior materials for automobiles. Polyamides used for exterior materials or interior materials of automobiles require higher levels of properties such as heat resistance, strength, and appe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08G69/26C08K3/22C08K3/32C08K5/00G02B5/08
CPCC08L77/06H01L33/60C08K2003/2241C08K3/22C08K3/32C08G69/265C08K2003/321C08L2201/08C08K5/13C08K2003/329
Inventor 家田真次藤野能宜日户祐
Owner ASAHI KASEI KK