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Polyamide, polyamide composition, and molded article

A polyamide composition and polyamide technology, which are used in polyamide compositions and molded products, and polyamide fields, can solve problems such as difficulty in obtaining molded products, and achieve low water absorption, vibration fatigue properties, excellent surface appearance, and polymerization yield. excellent rate

Active Publication Date: 2015-03-18
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, PA6T is a high-melting polyamide with a melting point of about 370°C. Therefore, although it is attempted to obtain a molded article from PA6T by melt molding, the polyamide undergoes severe thermal decomposition, and it is difficult to obtain a molded article with sufficient characteristics.

Method used

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  • Polyamide, polyamide composition, and molded article
  • Polyamide, polyamide composition, and molded article
  • Polyamide, polyamide composition, and molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0419] Hereinafter, the present embodiment will be described more specifically with examples and comparative examples, but the present embodiment is not limited to these examples.

[0420] The raw materials and measurement methods used in the examples and comparative examples are described below.

[0421] It should be noted that in this embodiment, 1kg / cm 2 Refers to 0.098MPa.

[0422] [Raw materials]

[0423] In this example and comparative example, the following compounds were used.

[0424]

[0425] (1) 1,4-Cyclohexanedicarboxylic acid (CHDC)

[0426] Trade name: 1,4-CHDA HP grade (trans form / cis form=25 / 75) (manufactured by Eastman Chemical)

[0427] (2) Sebacic acid (C10DC)

[0428] Trade name: Sebacic acid TA (manufactured by Ito Oil Co., Ltd.)

[0429] (3) Isophthalic acid (IPA) (manufactured by Wako Pure Chemical Industries, Ltd.)

[0430] (4) Adipic acid (ADA) (manufactured by Wako Pure Chemical Industries, Ltd.)

[0431]

[0432] (1) 1,10-Diaminodecane (1,10-decamethylene diamine) (...

manufacture example

[0448]

[0449] First, it is diluted with water to a solid content of 2% by mass of polyurethane resin, 4% by mass of maleic anhydride-butadiene copolymer, 0.6% by mass of γ-aminopropyltriethoxysilane, and 0.1% by mass of carnauba wax. Thus, a glass fiber sizing agent is obtained.

[0450] The obtained glass fiber sizing agent was adhered to the glass fiber having a number average fiber diameter of 7 μm obtained by melt spinning by a coater installed on the way to the rotating drum.

[0451] Then, the glass fiber to which the glass fiber sizing agent is adhered is dried, thereby obtaining a roving of the glass fiber bundle surface-treated with the glass fiber sizing agent.

[0452] At this time, the glass fiber is made into 1,000 pieces per bundle. The adhesion amount of the glass fiber sizing agent to the glass fibers was 0.6% by mass. This was cut into a length of 3 mm to obtain a chopped strand (hereinafter also abbreviated as "GF-2").

[0453] In addition, in this example, the a...

Embodiment 1

[0553] (Production of polyamide)

[0554] The polymerization reaction of polyamide is carried out by the "hot melt polymerization method" as described below.

[0555] 750 g (4.35 moles) of CHDC as (a) alicyclic dicarboxylic acid and 750 g (4.35 moles) of C10DA as (b) diamine with 8 or more carbon atoms were dissolved in 1500 g of distilled water to prepare a raw material list The body is equimolar about 50% by mass homogeneous aqueous solution.

[0556] The obtained aqueous solution and 17g (0.10 mol) of (b) C10DA as an additive during melt polymerization were put into an autoclave (manufactured by Nitto High Pressure) with an internal volume of 5.4L, and kept until the liquid temperature (internal temperature) reaches 50°C , Nitrogen replacement in the autoclave. Continue heating to bring the liquid temperature from about 50°C to the tank of the autoclave (hereinafter also abbreviated as "in the tank"). The pressure is about 2.5kg / in gauge (hereinafter, the pressure in the tank i...

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Abstract

A polyamide containing (a) a unit comprising at least one species of alicyclic dicarboxylic acid and (b) a unit comprising a C8 or higher diamine, and satisfying conditions (1) and (2). (1) The sulfuric acid relative viscosity etar at 25°C is 2.3 or higher. (2) The weight-average molecular weight (Mw) / the number-average molecular weight (Mn) is 4.0 or less.

Description

Technical field [0001] The present invention relates to polyamides, polyamide compositions and molded products. Background technique [0002] Polyamides represented by polyamide 6 and polyamide 66 (hereinafter sometimes referred to as "PA6" and "PA66" respectively), etc., are widely used in automobiles due to their excellent molding processability, mechanical properties, and chemical resistance. Various parts materials such as electrical and electronic use, industrial materials, industrial materials, daily use and household products. [0003] In the automobile industry, as an environmental countermeasure, a reduction in body weight is required in order to reduce exhaust gas. In order to meet this requirement, more and more polyamides are used instead of metals as exterior and interior materials of automobiles. Polyamides used for exterior and interior materials of automobiles require higher levels of heat resistance, strength, and appearance. [0004] Among them, since the tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/26C08L77/06
CPCC08G69/26C08L77/06C08G69/36C08G69/265C08K7/14
Inventor 家田真次永濑康一日户祐
Owner ASAHI KASEI KK
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