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Constituent part of cooling system for motor vehicle

A technology for cooling systems and motor vehicles, applied in the direction of engine cooling, liquid cooling, engine components, etc., can solve problems such as undesired deformation, creep of motor vehicle cooling system components, and accelerated deterioration rate of polyamide compositions, to achieve Effects of high productivity and improved service life

Active Publication Date: 2010-01-27
DENSO CORP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in automotive cooling system components in which a glass-reinforced polyamide composition is used, an increase in engine coolant temperature may accelerate the deterioration rate of the polyamide composition due to hydrolysis, thus requiring higher hydrolysis resistance
Additionally, prolonged exposure of polyamide compositions to high temperature fluids can lead to creep and other undesirable deformation of automotive cooling system components, requiring higher levels of toughness and high temperature creep resistance than the prior art

Method used

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  • Constituent part of cooling system for motor vehicle
  • Constituent part of cooling system for motor vehicle
  • Constituent part of cooling system for motor vehicle

Examples

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Embodiment Construction

[0075] An explanation of examples of polyamide 6,10 compositions is provided below.

[0076] Table 1 shows the materials and amounts of the components used in Examples 1 to 15 and Comparative Examples 1 to 6.

[0077] The amounts of components shown in Table 1 are expressed in weight percent based on the total weight of polyamide, glass fiber, carbon black, and copper (Cu).

[0078]

[0079] Sample Preparation: Examples (in Table 1, referred to as "Examples") and Comparative Examples (in Table 1, referred to as Comparative example) composition. Copper is added in the form of CuI. The amounts shown in Table 1 correspond to the actual weight of copper present.

[0080] In Examples 1 to 15 and Comparative Examples 1 and 2, five types of polyamide 6,10 (in the column of PA 6,10 in Table 1, referred to as "A" to "E") with different relative viscosities were used. "). Their relative viscosities are as follows:

[0081] Polyamide 6, 10A: 2.9

[0082] Polyamide 6, 10B: 2.8 ...

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Abstract

A tank main body (125) constituting a radiator header tank (120) is formed from a polyamide composition comprising polyamide-6,10, glass fibers, copper, and a nucleating agent. This polyamide composition specifically comprises 48.9-79.988 wt.% polyamide-6,10 (a), 20-50 wt.% glass fibers (b), 0.002-0.1 wt.% copper (c), and 0.01-1.5 wt.% nucleating agent (d) based on the total amount of the polyamide-6,10, glass fibers, copper, and nucleating agent. The composition has a half-crystallization time of 5 minutes or less. The polyamide-6,10 is one having a relative viscosity as measured in 98% sulfuric acid of 2.3-2.9.

Description

technical field [0001] The present invention relates to a motor vehicle cooling system exemplified by, for example, a radiator, a reserve tank, a heater core, a heat storage tank, a water vavle or a water pump part. Background technique [0002] Plastic parts used in motor vehicle cooling systems through which engine coolant flows require the use of a plastic that has satisfactory productivity, hydrolysis resistance, and resistance to cracking caused by exposure to calcium chloride. Satisfactory resistance to calcium chloride, and satisfactory toughness, etc. [0003] Thus, in the prior art, for example, glass-reinforced polyamide 6,6 compositions and glass-reinforced polyamide compositions reinforced with glass fibers have been used for the production of automotive cooling system components, the glass- The reinforced polyamide composition comprising a blend of polyamide 6,6 and polyamide 6,12 has better resistance to cracking caused by exposure to calcium chloride. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01P3/18C08K7/14C08L77/00F28F21/06
CPCF28F21/062F28D2021/0094C08K5/0083F01P3/18F01P2011/205C08K7/14F01P2060/08C08L77/06F28F9/0226C08K3/08
Inventor 后藤伸哉长屋隆彦野崎雅裕
Owner DENSO CORP
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