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Polybutylene terephthalate resin composition

A technology of polybutylene terephthalate and resin composition, applied in the field of polybutylene terephthalate resin composition, can solve problems such as strength reduction, and achieve the effect of inhibiting strength reduction

Active Publication Date: 2020-01-03
POLYPLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, polybutylene terephthalate resin has excellent physical properties and chemical properties, and when it is exposed to a high-temperature environment in a state of being in contact with automotive lubricating oil such as the above-mentioned ATF, decomposition becomes conspicuous, which may lead to Possibility of reduced strength
Therefore, for example, it is not used as a resin for molded products that are used in contact with automotive lubricating oil such as ATF for a long time as described above.

Method used

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  • Polybutylene terephthalate resin composition
  • Polybutylene terephthalate resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～14、 comparative example 1～6

[0103] [Production of resin composition, production of molded products]

[0104] The components shown in the following Tables 1 to 2 were weighed and then dry-blended, melted and kneaded using a 30mmφ twin-screw extruder (manufactured by Nippon Steel Works, TEX-30) to produce pellets (barrel temperature 260°C, discharge rate 15kg / h, screw speed 150rpm).

[0105] Next, the prepared pellets were charged into an injection molding machine (J55AD manufactured by Nippon Steel Corporation) to prepare ISO tensile test pieces.

[0106] Here, as constituent components of the resin composition, the following were used.

[0107] (A) Polybutylene terephthalate (PBT) resin

[0108] ・(A-1) Manufactured by WinTech Polymer Ltd., intrinsic viscosity 0.83, amount of terminal carboxyl group 14meq / kg

[0109] ・(A-2) Manufactured by WinTech Polymer Ltd., intrinsic viscosity 1.14, amount of terminal carboxyl group 8meq / kg

[0110] (B) Carbodiimide compound

[0111] (B-1) Aromatic carbodiimide c...

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Abstract

Provided is a resin composition which includes a poly(butylene terephthalate) resin excellent in terms of physical and chemical properties, etc. and which has excellent ATF resistance and is suitable for use as molded articles to be used in contact with high-temperature automotive lubricating oils such as ATF. The poly(butylene terephthalate) resin composition according to the present invention comprises a poly(butylene terephthalate) resin and a carbodiimide compound, has a tensile strength retention of 50% or higher after 250-hour immersion in a 150ºC automotive lubricating oil, and is for use in configuring molded articles to be used in contact with automotive lubricating oils.

Description

technical field [0001] The present invention relates to a polybutylene terephthalate resin composition, and more specifically, to a polybutylene terephthalate resin constituting a molded article used in a state of being in contact with an automotive lubricating oil such as ATF combination. Background technique [0002] For example, there is an AT connector as a component that connects electronic components that control a transmission mechanism of an automobile (AT vehicle). Usually, this AT connector is used in a state of being soaked in ATF (automatic transmission fluid) which is a kind of lubricating oil. [0003] When ATF is heated to a very high temperature of over 100°C, for example, about 150°C, as a molded product such as an AT connector used in a state immersed in this ATF, it will have excellent heat resistance, hydrolysis resistance, etc. considered as a condition. In addition, not limited to ATF, engine oil, brake oil, gear oil, etc., which are other automotive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K5/13C08K5/29C08K5/372C08K5/49
CPCC08K5/13C08K5/29C08K5/372C08K5/49C08L67/02
Inventor 小佐野惠市坂田耕一
Owner POLYPLASTICS CO LTD
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