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High-temperature oil resistant molded component for automobile

A molding part, high temperature technology, applied in the field of molding parts, can solve the problems of poor oil resistance of PBT resin, deterioration of dimensional stability and strength of molded parts, generation of voids, etc., and achieve the effect of excellent high temperature oil resistance

Inactive Publication Date: 2018-08-07
YAZAKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in such conventional materials, since PA resin has water absorption, which deteriorates the dimensional stability and strength of molded parts, it is problematic to apply PA resin to small parts
In addition, PPS resin has problems of mold staining due to gas generated during molding, and generation of voids in molded parts with complex shapes
In addition, since PPS resin has low flexibility, there is also a problem that it is difficult to form a lance portion for locking and holding a terminal, a locking portion for fitting a connector, etc. for a small part such as a connector by using PPS resin.
[0004] Polybutylene terephthalate (PBT resin) is a more manageable material for solving these problems, but there is a problem that PBT resin is inferior to PA resin and PPS resin in oil resistance

Method used

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  • High-temperature oil resistant molded component for automobile

Examples

Experimental program
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Effect test

Embodiment 1 to 9 and comparative example 1 to 4

[0057] In each example or comparative example, a resin composition containing the components listed in Table 1 below was produced. Using this resin composition, injection molding was performed by a horizontal molding machine manufactured by FUNAC Co., Ltd. at a resin temperature of 260° C. and a mold temperature of 80° C. to obtain a test piece 127 mm long, 12.7 mm wide, and 1.6 mm thick piece. Using the obtained test pieces, the following evaluation tests were performed.

[0058] [Table 1]

[0059]

[0060] Details of the individual components in Table 1 are described below.

[0061] PBT resin 1: PBT non-reinforced material manufactured by Toray Industries, Inc. 1401-X06

[0062] PBT resin 2: PBT SK602 manufactured by Du Pont

[0063] * As a PBT-G15 material, 18 parts by mass of glass fibers are contained per 100 parts by mass of PBT resin.

[0064] Epoxy type additive (epoxy compound): JONCRYL ADR4368 manufactured by BASF

[0065] Carbodiimide-type additive (carbodi...

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Abstract

A high-temperature oil resistant molded component for an automobile including a resin composition containing a polybutylene terephthalate resin and having a carboxyl end group concentration of 20 mmol / kg or less is provided. The resin composition preferably contains 0.1 to 0.5 parts by mass of an epoxy compound or 0.5 to 5 parts by mass of a carbodiimide compound with respect to 100 parts by massof the polybutylene terephthalate resin. With such a configuration, the molded component for an automobile is excellent in high-temperature oil resistance.

Description

technical field [0001] The invention relates to a molded part for automobiles. More specifically, the present invention relates to a molded part for automobiles, which is produced by molding a resin composition containing a polybutylene terephthalate resin and is excellent in oil resistance at high temperatures. Background technique [0002] For vehicles such as automobiles and trucks, oil resistance is required around molded parts used in portions exposed to oil, such as an engine and a transmission housing for automatic transmission. Polyamide (PA resin) and polyphenylene sulfide (PPS resin) are often used as conventional materials for molded parts for automobiles requiring oil resistance (for example, see JP 2014-93176A). [0003] However, among such conventional materials, application of PA resin to small parts is problematic because PA resin has water absorption, which deteriorates dimensional stability and strength of molded parts. In addition, PPS resin has problems...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L63/00C08K9/06C08K7/14
CPCC08L67/02C08L63/00C08K9/06C08K7/14C08G63/183C08K5/29C08G63/916C08L2201/08
Inventor 平田宙史
Owner YAZAKI CORP
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