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Polyamide resin composition

一种聚酰胺树脂、组合物的技术，应用在燃料部件,聚酰胺树脂组合物领域，能够解决HDPE树脂与聚酰胺树脂粘接性差、燃料罐主体无法得到充分的粘接强度、高密度聚乙烯的耐燃料透过性差等问题，达到燃料耐透过性优良、优良粘接强度和燃料气体阻挡性的效果

Inactive Publication Date: 2012-09-05
UBE IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, even if the amount of permeation of the fuel from the main body of the fuel tank can be reduced by the above methods, the amount of permeation from various parts (such as valves, etc.) attached to the fuel tank is large, so the volatilization from the entire fuel part is hindered. Quantity reduction
[0005] The reason is that in order to obtain sufficient bonding strength with the fuel tank, various parts attached to the fuel tank are made of the same material as the fuel tank, that is, high-density polyethylene, which has poor fuel permeation resistance.
[0006] Therefore, it has been studied to use polyamide resin with excellent fuel permeation resistance to manufacture various parts attached to the fuel tank, but because the adhesion between HDPE resin and polyamide resin is poor, there is a problem with the use of HDPE resin. The problem that sufficient bonding strength cannot be obtained for the main body of the formed fuel tank

Method used

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  • Polyamide resin composition
  • Polyamide resin composition
  • Polyamide resin composition

Examples

Experimental program
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Embodiment

[0091] Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not limited to this. In addition, the physical property measurement of the molded article in the Example and the comparative example was performed as follows.

[0092] (1) Determination of the terminal amino group concentration of polyamide resin

[0093] Add 1 g of polyamide resin to an Erlenmeyer flask with a stopcock, add 40 ml of a pre-adjusted solvent (phenol / methanol (volume ratio)=9 / 1), then stir and dissolve with a magnetic stirrer, using thymol blue as an indicator reagent, titrated with 0.02N hydrochloric acid, and then the concentration of the terminal amino group was determined.

[0094] (2) Determination of the terminal carboxyl group concentration of polyamide resin

[0095] 1 g of polyamide resin and 40 ml of benzyl alcohol were added to a three-neck pear-shaped flask, and then immersed in an oil bath set at 180° C. under...

Embodiment I-1

[0107] (1) Manufacture of aliphatic polyamide resin I-1

[0108] In a 70-liter autoclave, add 0.5 kg of water, 200 g, and 70 g of hexamethylenediamine to 20 kg of ε-caprolactam as a polymerizable monomer, replace the tank with nitrogen, heat to 100°C, and stir to make the tank become uniform within. Then, the inside of the tank was stirred for 1 hour under the conditions of 260° C. and 1.7 MPa. Thereafter, the pressure was released, and polymerization was performed under normal pressure for 3 hours while evaporating moisture from the reaction vessel. After the reaction, the polymer taken out from the lower nozzle of the reaction vessel in the form of strands is cooled and cut to obtain pellets formed of polyamide resin. The obtained pellets were extracted in hot water at 100° C. to extract unreacted monomers, and vacuum-dried to obtain samples.

[0109] The obtained polyamide 6 had a terminal amino group concentration of 100 meq / kg and a terminal carboxyl group concentratio...

Embodiment I-2

[0115] In Example I-1(2), Harima Chemicals Co., Ltd. granulated talc "HT-7050" (powder talc with an average particle diameter of 1.8 μm (aspect ratio: 10) 95.0% by weight + rosin-based resin (modified rosin) 5.0% by weight) 0.7% by weight and resin I-1 99.3% by weight, the same operation as Example I-1 was carried out to obtain a polyamide resin composition. As a result of electron microscope observation, talc was uniformly dispersed in the polyamide resin composition. The results are shown in Table 1.

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Abstract

Disclosed are: [1] a polyamide resin composition which is characterized by comprising 85 wt% or more of an aliphatic polyamide resin (A-1) in which the concentration of the terminal amino group is higher than that of the terminal carboxy group, 0.01 to 10 wt% of talc (B) which is dispersed in the aliphatic polyamide resin (A-1), and 0.0001 to 1 wt% of a dispersing agent (C); [2] a polyamide resincomposition which is characterized by comprising 75 to 95 wt% of the aliphatic polyamide resin (A-1), 1 to 15 wt% of an aromatic polyamide resin (A-2), 0.01 to 10 wt% of talc (B) which is dispersed in the polyamide resins (A-1) and (A-2), and 0.0001 to 1 wt% of a dispersing agent (C); [3] a process for producing each of the above-mentioned polyamide resin compositions; and [4] a fuel component comprising any one of the above-mentioned polyamide resin compositions. The polyamide resin compositions are not deteriorated in the properties inherent in polyamide resins and has excellent adhesion strength to a polyolefin resin and the like and excellent fuel gas barrier properties.

Description

technical field [0001] The present invention relates to a polyamide resin composition excellent in fuel permeation resistance for use in welded portions of fuel tanks and the like, a method for producing the same, and fuel parts using the polyamide resin composition. Background technique [0002] Conventionally, in consideration of safety and environmental measures, it has been required to reduce the amount of volatilization of fuel from the walls and connecting parts of fuel tanks and their accessories. For example, in the automotive field, fuel tanks made of single-layer high-density polyethylene (HDPE) resin manufactured by blow molding are popular. When using this HDPE resin fuel tank, in order to reduce the amount of permeation of the fuel from the tank main body, a method of sulfonating the HDPE resin (see Patent Document 1), a method of fluorine treatment, and the formation of a gas-barrier resin have been proposed. A method of forming a hollow molded body with a mul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/00B29C45/16C08L77/10C08L93/04
CPCB29C66/71B29C65/20B60K15/03177C08L2205/02B29C66/91411B29C65/06B29K2035/00B29L2031/7172B60K2015/03046B29C65/0672B29K2023/00B29C65/16B29K2077/00B29C65/14B29C66/919C08K3/14B29C65/8215B29C65/08C08L77/06C08L93/04B29C65/02B29C66/712C08K2201/008C08L2666/02Y10T428/31725B29C65/00
Inventor 坂本直树野中裕文儿玉齐
Owner UBE IND LTD