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Polyamide composition and molded article

A polyamide composition and polyamide technology, applied in the field of polyamide compositions and molded products, can solve problems such as inability to obtain molded products stably, fluidity changes caused by polyamide decomposition, and achieve surface appearance and weather resistance. Good, good surface appearance, excellent shape effect

Active Publication Date: 2022-03-22
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] On the other hand, when molding under high temperature conditions, there is a problem that the polyamide is decomposed or the fluidity changes, resulting in the inability to obtain molded products stably.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1～1-8

[1441] "Examples 1-1 to 1-8, Comparative Examples 1-1 to 1-6"

[1442] Hereinafter, specific examples and comparative examples are given to describe the above-mentioned forms in detail, but the above-mentioned forms are not limited to the following examples. It should be noted that, in this embodiment, 1kg / cm 2 means 0.098MPa.

[1443] First, (1A) aliphatic polyamide, (1B) semiaromatic polyamide, (1C) inorganic filler, and (1D) additives used in Examples and Comparative Examples are shown below.

[1444] (1A) Aliphatic polyamide

[1445] 1A-1: Polyamide 66

[1446] 1A-2: Polyamide 66

[1447] 1A-3: Polyamide 66

[1448] (1B) Semi-aromatic polyamide

[1449] 1B-1: polyamide 66 / 6I (Mw = 28000, Mw / Mn = 2.3, the total amount of amino terminal and carboxyl terminal: 154 μ equivalent / g)

[1450] 1B-2: Polyamide 6I (Mw=20000, Mw / Mn=2.0, total amount of amino terminal and carboxyl terminal: 253 μ equivalent / g)

[1451] 1B-3: Polyamide 6I T-40 (manufactured by Lanxess, Mw=44000...

Embodiment 1-1～1-8 and comparative example 1-1～1-6

[1504] Using the aforementioned (1A) aliphatic polyamide and (1B) semiaromatic polyamide in the types and ratios described in Table 1-1 below, polyamide compositions were produced as follows.

[1505] It should be noted that the polyamide obtained above was dried in a nitrogen gas flow to adjust the moisture content to about 0.2% by mass, and then used as a raw material of a polyamide composition.

[1506] A twin-screw extruder [ZSK-26MC: manufactured by Coperion (Germany)] was used as a production apparatus of the polyamide composition.

[1507] The twin-screw extruder has an upstream supply port at the first barrel from the upstream side of the extruder, a downstream first supply port at the sixth barrel, and a downstream side at the ninth barrel Second supply port. In addition, in the twin-screw extruder, L / D was 48, and the number of barrels was 12.

[1508] In the twin-screw extruder, the temperature from the upstream side supply port to the die was set to the melting p...

Embodiment 2-1～2-4、 comparative example 2-1～2-7

[1568] (Constituent) [(2A) Aliphatic polyamide]

[1569] 2A-1: Polyamide 66 (using the same material as 1A-1 above)

[1570] 2A-2: Polyamide 6 (SF1013A manufactured by Ube Industries)

[1571] [(2B) Semi-aromatic polyamide]

[1572] 2B-1: Polyamide 6I (the same material as that of 1B-2 above was used)

[1573] 2B-2: Polyamide 6I (T40 manufactured by LANXESS, Mw=44000, Mw / Mn=2.8, VR31, Mw / VR=1419)

[1574] 2B-3: Polyamide 6I / 6T (G21 manufactured by EMS, Mw=27000, Mw / Mn=2.2, Mw / VR=1000, VR27, Mw / VR=1000, dicarboxylic acid unit isophthalic acid The ratio is 70 mol%)

[1575] 2B-4: Polyamide 6I (high molecular weight)

[1576] 2B-5: Polyamide 66 / 6I (using the same material as 1B-1 above)

[1577] [(2C) pigment]

[1578] (2C) Zinc sulfide (ZnS) (SACHTOLITH HD-S) was used.

[1579] [(2D1) flame retardant]

[1580] (2D1) Brominated polystyrene (manufactured by Albemarle Corporation, brand name "SAYTEX (registered trademark) HP-7010G" (bromine content determined by elemental ...

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Abstract

The present invention provides a polyamide composition containing 50 to 99 parts by mass of (1A) an aliphatic compound containing a diamine and a dicarboxylic acid, and molded articles using the polyamide composition. Polyamide and 1 to 50 parts by mass of (1B) semi-aromatic polyamide, the (1B) semi-aromatic polyamide contains dibasic carboxylic acid units and diamine units, and the dibasic carboxylic acid units include at least 75 mol% of isophthalic acid, the diamine units comprising at least 50 mol% of diamines having 4 to 10 carbon atoms, wherein the polyamide composition has a tanδ peak temperature of 90°C or higher, and The weight average molecular weight Mw of the above polyamide composition is 15000≤Mw≤35000.

Description

technical field [0001] The present invention relates to polyamide compositions and molded articles. [0002] This application claims priority based on Japanese Patent Application No. 2017-068946 for which it applied in Japan on March 30, 2017, and uses the content here. Background technique [0003] Polyamides represented by polyamide 6 (hereinafter sometimes referred to as "PA6") and polyamide 66 (hereinafter sometimes referred to as "PA66") are widely used due to their excellent moldability, mechanical properties, and chemical resistance. It is used as a material for various parts such as automobiles, electrical and electronic products, industrial materials, industrial materials, and daily and household products. [0004] In recent years, the use environment of polyamide has become more and more strict in thermal and mechanical aspects, and the mechanical properties, especially the rigidity after water absorption (hereinafter sometimes referred to as "water absorption rig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08G69/26C08K3/013C08K3/016C08K3/32C08K5/00C08K5/524C08K7/06C08L71/12
CPCC08L77/06C08L2205/025C08L2201/02C08L25/06C08K3/2279C08K5/3475C08K7/14C08K3/013C08K3/016C08K3/32C08K5/00C08K5/524C08K7/06C08L71/12C08G69/265B29C45/0001C08G69/26C08K3/04C08K3/22C08K5/005C08K5/0066C08K5/51C08K2003/2241C08L2203/20C08L2205/02
Inventor 家田真次永濑康一山田飞将三上纯胁田嵩之荒木祥文川谷公昭奥村知世近藤义公寺田和范
Owner ASAHI KASEI KK