JPH07118509A - Polybutylene terephthalate resin composition - Google Patents

Polybutylene terephthalate resin composition

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Publication number
JPH07118509A
JPH07118509A JP26854893A JP26854893A JPH07118509A JP H07118509 A JPH07118509 A JP H07118509A JP 26854893 A JP26854893 A JP 26854893A JP 26854893 A JP26854893 A JP 26854893A JP H07118509 A JPH07118509 A JP H07118509A
Authority
JP
Japan
Prior art keywords
weight
kaolin
flame
parts
resin composition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP26854893A
Other languages
Japanese (ja)
Inventor
Shinji Ohara
真二 大原
Minoru Omoto
実 大本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kuraray Co Ltd
Ube Corp
Original Assignee
Kuraray Co Ltd
Ube Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kuraray Co Ltd, Ube Industries Ltd filed Critical Kuraray Co Ltd
Priority to JP26854893A priority Critical patent/JPH07118509A/en
Publication of JPH07118509A publication Critical patent/JPH07118509A/en
Withdrawn legal-status Critical Current

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Abstract

PURPOSE:To provide the title compsn. which has good flame-retardant and electrical properties and is suitable for electrical parts such as a relay, a switch, and a terminal board. CONSTITUTION:The compsn. comprises 95-75wt.% flame-retardant resin compsn consisting of 100 pts.wt. polybutylene terephthalate resin. 15-30 pts.wt. bromine flame retardant, and 5-10 pts.wt. antimony oxide compd., and 5-25wt.% unbaked kaolin.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、ポリブチレンテレフタ
レート樹脂組成物に関し、特に難燃性と電気特性に優
れ、電気・電子機器部品において使用されるリレー、端
子台、スイッチなどの部品に適したポリブチレンテレフ
タレート樹脂組成物に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polybutylene terephthalate resin composition, which is particularly suitable for parts such as relays, terminal blocks and switches used in electric / electronic equipment parts because of its excellent flame retardancy and electric characteristics. It relates to a polybutylene terephthalate resin composition.

【0002】[0002]

【従来の技術】電気、電子分野では、強化された難燃性
樹脂組成物を中心に、様々な組成により種々の特徴をも
ったポリブチレンテレフタレート(以下「PBT」とい
う)樹脂が使用されており、近年特に寸法安定性、成形
性、機械的特性等の観点からその使用量が増えている。
通常使用されている強化難燃PBT樹脂組成物は、その
多くがPBT樹脂、臭素系難燃剤、酸化アンチモン化合
物、ガラス繊維等の強化材、および添加剤を含んでなる
組成物であり、これに、様々な特性を付与する為に、さ
らに幾つかの物質が添加されている。
2. Description of the Related Art In electrical and electronic fields, reinforced flame-retardant resin compositions are mainly used, and polybutylene terephthalate (hereinafter referred to as "PBT") resins having various characteristics due to various compositions are used. In recent years, the amount of use has been increasing especially from the viewpoints of dimensional stability, moldability, mechanical properties and the like.
Most of the commonly used reinforced flame retardant PBT resin compositions are compositions containing PBT resin, a brominated flame retardant, an antimony oxide compound, a reinforcing material such as glass fiber, and an additive. , Several substances have been added to impart various properties.

【0003】電気、電子分野に使用される部品等に要求
されている特性の一つとしてUL746A等に規定され
ている電気特性が挙げられる。例えば連続的に加熱され
た導線による発火し易さ(HWI=ホットワイヤー発
火)、高電圧下でのアークトラッキング性(HVT
R)、連続的なアーク放電に対する耐性(耐アーク
性)、電極部に付着したほこりが吸湿した場合や、間欠
的に雨水等がかかった場合を想定した耐トラッキング性
(CTI)などの電気特性は、スイッチ、リレー等通電
時にアーク放電が発生する部品や、端子台等の高電圧が
連続して印加される可能性の高い部品等に特に重要な特
性である。
One of the characteristics required for parts used in the electric and electronic fields is the electric characteristics defined in UL746A and the like. For example, it is easy to ignite with a conductive wire that is continuously heated (HWI = hot wire ignition), arc tracking property under high voltage (HVT).
R), resistance to continuous arc discharge (arc resistance), electric resistance such as tracking resistance (CTI) assuming that dust adhering to the electrode absorbs moisture or intermittent rainwater etc. Is a particularly important characteristic for components such as switches and relays that generate arc discharge when energized, and components such as terminal blocks that are likely to be continuously applied with high voltage.

【0004】しかしながら、PBT樹脂組成物を難燃化
する際に添加される難燃剤と酸化アンチモン化合物に
は、その難燃化機構から炭化物を形成しやすくする働き
があるため、これらの電気特性は、PBT樹脂組成物の
難燃性を向上させると逆に低下する傾向にある。このた
めPBT樹脂組成物の難燃化は電気・電子分野では一部
を除き必要不可欠な特性であり、PBT樹脂組成物の難
燃化、特にUL94において規定されている垂直燃焼ラ
ンクV−0の難燃化を達成するためには、PBT樹脂組
成物の電気特性をかなり犠牲とする必要があった。
However, since the flame retardant and the antimony oxide compound added when making the PBT resin composition flame-retardant have the function of facilitating the formation of carbides due to the flame-retardant mechanism, their electrical characteristics are On the contrary, when the flame retardancy of the PBT resin composition is improved, it tends to decrease. Therefore, the flame retardancy of the PBT resin composition is an essential property in the electric and electronic fields except for a part thereof, and the flame retardancy of the PBT resin composition, especially the vertical combustion rank V-0 specified in UL94. In order to achieve flame retardancy, it was necessary to considerably sacrifice the electrical characteristics of the PBT resin composition.

【0005】従来この問題を解決するために、例えば特
公昭51−3500号公報には針状メタ硅酸カルシウム
の添加などの無機充填剤を添加する方法、特開昭51−
44154号公報、特開昭51−80351号公報など
にはアンチモン酸ナトリウムなど特殊なアンチモン化合
物を使用する方法、および特開昭51−70251号公
報にはデカブロモジフェニルエーテル等の臭素含有量の
高い難燃剤を使用して難燃剤の総量を減らす方法等がそ
れぞれ提案されている。しかしながら、これらは主に耐
アーク性の改良に重点をおいた改良であり、他の電気特
性への考慮がほとんどなされておらず、また機械物性の
低下や使用上、安全上の問題点などの改良の程度も不十
分であった。
In order to solve this problem, for example, Japanese Patent Publication No. 51-3500 discloses a method of adding an inorganic filler such as the addition of needle-like calcium metasilicate.
44154, JP-A-51-80351 and the like use a special antimony compound such as sodium antimonate, and JP-A-51-70251 discloses that a high content of bromine such as decabromodiphenyl ether is difficult. Methods such as reducing the total amount of flame retardant using a flame retardant have been proposed. However, these are mainly improvements focusing on the improvement of arc resistance, little consideration is given to other electrical characteristics, and there is a decrease in mechanical properties, use, and safety problems. The degree of improvement was also insufficient.

【0006】[0006]

【発明が解決しようとする課題】したがって、本発明
は、機械的特性等の材料特性を高レベルに維持したま
ま、優れた電気特性を有する強化難燃PBT樹脂組成物
を提供することを目的としており、この組成物を用いる
ことにより、安全で且つ信頼性の高い電気、電子部品を
得ることができる。
SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a reinforced flame-retardant PBT resin composition having excellent electrical properties while maintaining material properties such as mechanical properties at a high level. Therefore, by using this composition, safe and highly reliable electric and electronic parts can be obtained.

【0007】[0007]

【課題を解決するための手段】本発明者らは、上記問題
点を解決すべく鋭意検討した結果、未焼成のカオリンを
難燃PBT樹脂組成物に5〜25重量%添加することに
より、アーク放電等による発火現象に対し炭化路を形成
しにくくし、難燃性を損なわずに高い電気特性を発現す
ることができることを見出し、本発明を完成した。すな
わち、本発明の要旨とするところは、(A)ポリブチレ
ンテレフタレート樹脂100重量部に対し、(B)臭素
系難燃剤15〜30重量部および、(C)酸化アンチモ
ン化合物5〜10重量部からなる組成物95〜75重量
%と、(D)未焼成カオリン5〜25重量%とからなる
難燃性ポリブチレンテレフタレート樹脂組成物である。
Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that by adding 5 to 25% by weight of unburned kaolin to a flame-retardant PBT resin composition, the arc The present invention has been completed by finding that it is difficult to form a carbonized path against an ignition phenomenon due to discharge or the like, and high electrical characteristics can be exhibited without impairing flame retardancy. That is, the gist of the present invention is that from (A) 100 parts by weight of polybutylene terephthalate resin, (B) 15 to 30 parts by weight of brominated flame retardant and (C) 5 to 10 parts by weight of antimony oxide compound. A flame-retardant polybutylene terephthalate resin composition comprising 95 to 75% by weight of the following composition and (D) 5 to 25% by weight of unsintered kaolin.

【0008】発明者らは従来知られている難燃剤の中
で、特異な難燃化効果を発揮する金属水酸化物に着目し
た。水酸化アルミニウム、水酸化マグネシウムは電線被
覆用難燃化ポリオレフィン等に使用されており、加熱時
に水分子を放出し、その蒸発潜熱により燃焼部位を冷却
するとともに、空気を遮断して消火する、いわば通常の
火災における放水消火と同様の効果を発揮するものと理
解されている。しかし、これらが加熱時に水分子を放出
する温度は比較的高温の水酸化マグネシウムでも270
〜280℃付近からであり、PBT樹脂の成形加工時に
一部の脱水反応がおきてしまい、十分な難燃効果が発揮
できない状況にあった。また、成形加工時の脱水反応は
ポリエステルの加水分解反応を引き起こし、成形品の物
性を著しく低下させる恐れがあった。
Among the flame retardants known hitherto, the inventors have paid attention to a metal hydroxide that exhibits a unique flame retardant effect. Aluminum hydroxide and magnesium hydroxide are used in flame-retardant polyolefins for coating electric wires, etc., and release water molecules during heating, which cools the combustion site by the latent heat of vaporization and shuts off the air to extinguish, so to speak. It is understood to have the same effect as water discharge extinguishing in a normal fire. However, the temperature at which they release water molecules when heated is 270 even with relatively high temperature magnesium hydroxide.
Since the temperature was around 280 ° C, a part of the dehydration reaction occurred during the molding process of the PBT resin, and a sufficient flame retardant effect could not be exhibited. In addition, the dehydration reaction during the molding process may cause the hydrolysis reaction of the polyester, which may significantly deteriorate the physical properties of the molded product.

【0009】一方、耐アーク性を中心に改良効果のある
組成物として、タルク、雲母、さらには先に記載した針
状メタ硅酸カルシウムなどの硅酸塩化合物が古くから知
られており、近年では特表昭56−500416号公報
などにその効果が記載されている。しかしタルク、雲母
粉等の添加により耐アーク性等を改良するためには相当
量の充填が必要な上に、板状結晶であることの形状因子
により特にウェルド強度を中心に機械的特性が著しく低
下する傾向があった。
On the other hand, talc, mica, and the silicate compounds such as the acicular calcium metasilicate described above have been known for a long time as compositions having an improving effect mainly on arc resistance. The effect is described in Japanese Patent Publication No. 56-500416. However, in order to improve arc resistance etc. by adding talc, mica powder, etc., a considerable amount of filling is required, and in addition, due to the shape factor of being a plate crystal, the mechanical properties, especially the weld strength, are remarkable. It tended to decline.

【0010】これらの、加熱時に水分子を放出する化合
物の効果と、硅酸塩化合物の効果を考慮した上で最も電
気的特性を改良できる化合物として未焼成のカオリンを
選定し、組成検討を行った結果、5〜25重量%という
比較的低充填量で抜群の効果を発揮することが判明し、
本発明に至ったものである。
Taking into consideration the effects of these compounds that release water molecules upon heating and the effects of silicate compounds, uncalcined kaolin is selected as the compound that can improve the electrical characteristics most, and the composition is studied. As a result, it was found that the excellent effect is exhibited at a relatively low filling amount of 5 to 25% by weight,
The present invention has been achieved.

【0011】カオリンの主成分であるカオリナイトの結
晶水の放出温度は約600℃(化学工業社刊、増補プラ
スチックおよびゴム用添加剤実用便覧597頁、6−3
−3−3−6)項等に記載)であることから、組成物の
混練、成形加工時に水分子が放出されることはなく、燃
焼時に有効的に水が放出されることが推定された。また
カオリナイトは硅酸アルミニウムを主成分とする硅酸塩
類であり、形状もやや微細であることから、機械的強度
をあまり損なわずに、マイカ、クレーと同様の耐アーク
性等の改良効果が期待できた。
The release temperature of crystal water of kaolinite, which is the main component of kaolin, is about 600 ° C. (published by Kagaku Kogyo Co., Ltd., Supplementary Plastics and Rubber Additives Handbook, pages 597, 6-3).
-3-3-6))), it was estimated that water molecules are not released during kneading and molding of the composition, and that water is released effectively during combustion. . Further, kaolinite is a silicate having aluminum silicate as a main component, and since its shape is also slightly fine, it has the same effect of improving arc resistance as mica and clay without significantly impairing mechanical strength. I was expecting it.

【0012】更に、カオリンの使用とその効果について
は特開昭51−127149号公報等に記載されている
が、本発明では、未焼成のカオリンすなわち結晶水を持
った状態でのカオリンのより優れた効果を期待したもの
である。
Further, although the use of kaolin and its effect are described in JP-A-51-127149, in the present invention, it is superior to kaolin in the state of having uncalcined kaolin, that is, water of crystallization. It is expected to have an effect.

【0013】本発明に使用される未焼成カオリンは、特
にその性状が限定されるものではないが、2μm以下の
粒子径のものが80%以上含まれる微粒子品が特に好ま
しい。その添加量は全重量中5〜25重量%の範囲であ
ることが必要であり、特に10〜20%の範囲で最も高
い効果を総合的に発揮する。未焼成カオリンの添加量が
全重量中5重量%未満であると、電気特性の改良効果は
認められず、一方25重量%を超えるとウェルド強度、
引張伸び、アイゾット衝撃値等の機械的特性が低下し実
用上好ましくない。
The properties of the unsintered kaolin used in the present invention are not particularly limited, but a fine particle product containing 80% or more of particles having a particle size of 2 μm or less is particularly preferable. The addition amount is required to be in the range of 5 to 25% by weight in the total weight, and particularly the highest effect is comprehensively exhibited in the range of 10 to 20%. If the amount of uncalcined kaolin added is less than 5% by weight based on the total weight, the effect of improving electrical properties is not observed, while if it exceeds 25% by weight, weld strength,
Mechanical properties such as tensile elongation and Izod impact value deteriorate, which is not preferable for practical use.

【0014】未焼成カオリンには目的とする特性を損な
わない範囲で表面処理を施すことができる。表面処理方
法としては、アミノシラン系化合物、エポキシシラン系
化合物、チタネート系化合物等で処理する方法等が挙げ
られるが、これらに限定されるものではない。
The uncalcined kaolin can be surface-treated so long as the desired characteristics are not impaired. Examples of the surface treatment method include, but are not limited to, a method of treating with an aminosilane compound, an epoxysilane compound, a titanate compound, or the like.

【0015】本発明において使用される難燃剤として
は、臭素系難燃剤であれば特に制限はなく、例えば臭素
化ポリカーボネート系難燃剤、臭素化フェノキシ系難燃
剤、臭素化エポキシ系難燃剤、臭素化アクリル系難燃
剤、臭素化ポリスチレン系難燃剤等が挙げられる。これ
らは一種または二種以上混合して用いられる。難燃剤の
添加量は、PBT樹脂100重量部に対して15〜30
重量部の範囲であることが必要である。添加量が15重
量部未満では十分な難燃効果が発揮されず、一方30重
量部を超えると著しい物性の低下が認められ実用に適さ
ない。また、後に記述するとおり、特性を損なわない範
囲でPBT樹脂に他の樹脂成分を添加した場合には、P
BT樹脂と他の樹脂成分の合計100重量部に対する添
加量としてこれらの数量を適用する。
The flame retardant used in the present invention is not particularly limited as long as it is a brominated flame retardant. For example, brominated polycarbonate flame retardant, brominated phenoxy flame retardant, brominated epoxy flame retardant, brominated flame retardant. Examples thereof include acrylic flame retardants and brominated polystyrene flame retardants. These may be used alone or in combination of two or more. The amount of flame retardant added is 15 to 30 with respect to 100 parts by weight of PBT resin.
It must be in the range of parts by weight. If the amount added is less than 15 parts by weight, a sufficient flame retardant effect is not exhibited, while if it exceeds 30 parts by weight, the physical properties are remarkably deteriorated and it is not suitable for practical use. In addition, as will be described later, when other resin components are added to the PBT resin within the range where the characteristics are not impaired, P
These quantities are applied as the addition amount to 100 parts by weight of the BT resin and other resin components in total.

【0016】本発明に使用される酸化アンチモン化合物
は、三酸化アンチモン、四酸化アンチモン、五酸化アン
チモン、アンチモン酸ナトリウムなどが例示できるが、
特に限定するものではない。酸化アンチモン化合物の添
加量は、PBT樹脂100重量部に対して5〜10重量
部の範囲で用いられ、通常難燃剤量の3分の1の量で使
用される。その添加量が5重量部未満では十分な難燃効
果が発揮されず、一方10重量部を超えると増量効果が
認められないばかりか、多量に使用すると著しい物性の
低下が認められ実用に適さない。また、後に記述すると
おり、特性を損なわない範囲でPBT樹脂に他の樹脂成
分を添加した場合には、PBT樹脂と他の樹脂成分の合
計100重量部に対する添加量としてこれらの数量を適
用する。
Examples of the antimony oxide compound used in the present invention include antimony trioxide, antimony tetraoxide, antimony pentoxide and sodium antimonate.
It is not particularly limited. The addition amount of the antimony oxide compound is in the range of 5 to 10 parts by weight with respect to 100 parts by weight of the PBT resin, and is usually used in an amount of 1/3 of the amount of the flame retardant. If the amount added is less than 5 parts by weight, sufficient flame retardant effect is not exhibited, while if it exceeds 10 parts by weight, not only the effect of increasing the amount is not observed, but also if used in a large amount, remarkable deterioration of physical properties is observed and it is not suitable for practical use. . Further, as will be described later, when other resin components are added to the PBT resin within a range that does not impair the characteristics, these amounts are applied as the addition amount with respect to 100 parts by weight of the PBT resin and the other resin components in total.

【0017】本発明の組成物には、発明の目的を損なわ
ない範囲で、ガラス繊維を用いて特性を改質することが
できる。この場合に使用されるガラス繊維としては、特
に限定されず、通常使用されるガラス繊維が使用可能で
ある。ガラス繊維の使用量としては、本発明の特徴を発
揮する上で特に制限を設けるものではないが、40%を
超える強化量ではカオリンとの合計充填量が50%を超
える場合もおこり、実用上、成形性、機械的特性が著し
く損なわれるため、40%以下の量である。
In the composition of the present invention, glass fibers may be used to modify the properties as long as the object of the invention is not impaired. The glass fiber used in this case is not particularly limited, and a commonly used glass fiber can be used. The amount of the glass fiber used is not particularly limited in order to exert the characteristics of the present invention, but when the reinforcing amount exceeds 40%, the total filling amount with kaolin may exceed 50%, which is not practical. Since the moldability and mechanical properties are significantly impaired, the amount is 40% or less.

【0018】本発明には、発明の目的を損なわない範囲
で種々の他の成分を添加することができる。目的、用途
に応じて、例えば耐熱剤、耐候剤、離型剤、核剤、滑
剤、可塑剤、無機強化材、着色剤、その他の改質剤の
他、無機充填材、有機充填材、他の高分子材料等を使用
することができる。
Various other components can be added to the present invention as long as the object of the invention is not impaired. Depending on the purpose and application, for example, heat-resistant agents, weather-resistant agents, release agents, nucleating agents, lubricants, plasticizers, inorganic reinforcing agents, coloring agents, other modifiers, inorganic fillers, organic fillers, etc. It is possible to use a polymer material of

【0019】本発明のPBT樹脂組成物を製造する方法
としては、特に限定されるものではなく、一般の難燃P
BT樹脂組成物を製造する方法を適用することができ
る。未焼成カオリンの脱水温度は600℃付近であるの
で、カオリンの脱水について特に加工条件を考慮する必
要はなく、目的とする難燃性と機械的特性を発現できる
条件選定を行えば、特に加工方法に制限を設けるもので
はない。ガラス繊維を用いる場合の好ましい方法として
は二軸押出機を使用し、ガラス繊維以外の成分をすべて
初めから投入し、溶融混合した後に途中からガラス繊維
を添加する方法、あるいはガラス繊維、カオリン、その
他の無機充填材を除いたすべての成分を初めから投入
し、溶融混合した後、途中からカオリンとその他の無機
充填材を投入して混合し、さらにその後ガラス繊維を投
入して混合する方法が挙げられる。
The method for producing the PBT resin composition of the present invention is not particularly limited, and a general flame retardant P
A method for producing a BT resin composition can be applied. Since the dehydration temperature of uncalcined kaolin is around 600 ° C., it is not necessary to consider the processing conditions for the dehydration of kaolin, and if the conditions that can achieve the target flame retardancy and mechanical properties are selected, the processing method will be particularly Does not impose any restrictions. When using glass fibers, a preferred method is to use a twin-screw extruder, in which all components other than glass fibers are added from the beginning, and glass fibers are added halfway after being melt mixed, or glass fibers, kaolin, etc. The method of adding all the components excluding the inorganic filler from the beginning, melt-mixing, then adding kaolin and other inorganic fillers from the middle and mixing, and then adding the glass fibers and mixing are mentioned. To be

【0020】[0020]

【実施例】以下に実施例および比較例を用いて、本発明
をさらに具体的に説明する。以下の実施例および比較例
においては、使用した成分はガラス繊維を除いてすべて
ヘンシェル型混合機を用いて前混合したものを用意し、
これを日本製鋼所製44mmφ同方向回転二軸混練機に
初めから供給し、途中からガラス繊維を投入して加熱溶
融混合したものを用いた。混合した組成物はペレットと
して採取し、乾燥後射出成形機を用いて、所定の試験片
に成形した。成形した試験片は一般試験用と電気特性用
に分け、一般試験片は湿度50%、温度23℃で2日間
状態調節して試験に供した。また、電気特性用試験片
は、湿度50%、温度23℃で2週間状態調節した後測
定に供した。
EXAMPLES The present invention will be described more specifically below with reference to Examples and Comparative Examples. In the following Examples and Comparative Examples, the components used were all pre-mixed using a Henschel type mixer except for glass fiber,
This was supplied from the beginning to a 44 mmφ co-rotating twin-screw kneader manufactured by Japan Steel Works, and glass fibers were charged in the middle and heated and melted and mixed, and used. The mixed composition was collected as pellets, dried, and molded into a predetermined test piece using an injection molding machine. The molded test pieces were divided into those for general tests and those for electrical characteristics. The general test pieces were conditioned at a humidity of 50% and a temperature of 23 ° C. for 2 days and then subjected to the test. The test pieces for electrical characteristics were subjected to measurement after conditioning for 2 weeks at a humidity of 50% and a temperature of 23 ° C.

【0021】使用したカオリンは次の性状のものを用い
た。 未焼成カオリン 粒径2μm以下83%以上 強熱減
量14% 未焼成カオリン 粒径2μm以下45%以上 強熱減
量11% 未焼成カオリン 粒径2μm以下25%以上 強熱減
量11%PH調整品 未焼成カオリン 粒径2μm以下53%以上 強熱減
量0.1% 焼成カオリン+表面処理 上記にアミノシラン処理
The kaolin used had the following properties. Unbaked kaolin Particle size 2 μm or less 83% or more Ignition loss 14% Unbaked kaolin particle size 2 μm or less 45% or more Ignition loss 11% Unbaked kaolin Particle size 2 μm or less 25% or more Ignition loss 11% PH adjusted product Unbaked Kaolin Particle size 2 μm or less 53% or more Ignition loss 0.1% Calcined kaolin + surface treatment Above aminosilane treatment

【0022】機械的特性として、引張試験(ASTMD
638準拠、I号ダンベル試験片使用)、曲げ試験(A
STMD790準拠、6.4mm厚みの短冊試験片使
用)、アイゾット衝撃試験(ASTMD256準拠、
3.2mm厚み衝撃試験片使用、切削ノッチ付およびノ
ッチ無し試験実施)を行った。また、電気特性試験とし
てUL746Aに記載の方法に従って、HWI、HA
I、HVTR、耐アーク性の評価を行った。更に、燃焼
性の確認のため、0.8mm厚みの短冊試験片を用い
て、UL94記載の垂直燃焼試験に従って、燃焼性を評
価した。
Mechanical properties include tensile test (ASTMD
638 standard, No. I dumbbell test piece used), bending test (A
STMD790 compliant, 6.4 mm thick strip test piece used, Izod impact test (ASTM D256 compliant,
A 3.2 mm thick impact test piece was used, and a test with and without a cutting notch was conducted). In addition, according to the method described in UL746A as an electrical characteristic test, HWI, HA
I, HVTR, and arc resistance were evaluated. Further, in order to confirm the flammability, a flammability was evaluated according to a vertical flammability test described in UL94 using a strip test piece having a thickness of 0.8 mm.

【0023】実施例1、および比較例1〜2 PBT樹脂(極限粘度0.85)100重量部に対し、
臭素化ポリカーボネート(以下臭素化PC)系難燃剤2
0重量部、平均粒子径7μmの三酸化アンチモン7.2
重量部の比率で混合したもの82.4重量%と、未焼成
カオリン17.6重量%からなる組成物100重量部
に対し、直径13μmのガラス繊維(長さ3mm、表面
処理品)17.6重量部を、上記の方法にて加熱溶融混
合した後、特性を評価した。結果を表1に示す。カオリ
ンを使用しなかった他は同様に評価した比較例1およ
び、カオリンの代わりにガラス繊維を用いた比較例2に
比べ、機械的強度は遜色ない値を示しつつ、優れた電気
特性を示している。
Example 1 and Comparative Examples 1-2 With respect to 100 parts by weight of PBT resin (intrinsic viscosity 0.85),
Brominated polycarbonate (hereinafter brominated PC) flame retardant 2
Antimony trioxide 7.2 with 0 parts by weight and an average particle size of 7 μm
Glass fiber having a diameter of 13 μm (length 3 mm, surface-treated product) 17.6 with respect to 100 parts by weight of a composition consisting of 82.4% by weight of a mixture of parts by weight and 17.6% by weight of uncalcined kaolin. After parts by weight were heated, melted and mixed by the above method, the characteristics were evaluated. The results are shown in Table 1. Compared with Comparative Example 1 and Comparative Example 2 in which glass fiber was used instead of kaolin except that kaolin was not used, mechanical strength showed a value comparable to that of Comparative Example 1 and excellent electrical characteristics. There is.

【0024】実施例2〜4、および比較例1と3 実施例1の組成を基本に未焼成カオリンの量を変化さ
せて評価を行ったところ、表1及び表2から分かるよう
に、カオリン0重量%から10重量%の間で電気特性の
大きな変化が確認された。また、カオリン23.5重量
%と35.3重量%の間では機械的特性の大きな変化が
確認された。
Examples 2 to 4 and Comparative Examples 1 and 3 Evaluations were carried out by changing the amount of uncalcined kaolin based on the composition of Example 1, and as shown in Tables 1 and 2, kaolin 0 was obtained. A large change in the electrical properties was confirmed between 10% and 10% by weight. Also, a large change in mechanical properties was confirmed between kaolin 23.5 wt% and 35.3 wt%.

【0025】実施例5〜6、および比較例4〜7 実施例1の組成を基本にカオリンの種類を替えて実施例
5〜6および比較例4〜5の評価を行った。また、カオ
リンの代わりにタルク、マイカを用いて同様の評価を行
い、カオリンの場合と比較した。結果を表2に示す。カ
オリンどうしでは粒子径等種類の差はあまりみられなか
ったものの、未焼成品と焼成品との差は大きく、またタ
ルク、マイカの場合も電気特性、機械特性が劣る傾向が
見られた。
Examples 5 to 6 and Comparative Examples 4 to 7 Examples 5 to 6 and Comparative Examples 4 to 5 were evaluated by changing the type of kaolin based on the composition of Example 1. In addition, talc and mica were used instead of kaolin, and the same evaluation was performed and compared with the case of kaolin. The results are shown in Table 2. Although there was not much difference in the particle size and the like between kaolins, the difference between the unbaked product and the baked product was large, and the electrical and mechanical properties of talc and mica tended to be inferior.

【0026】[0026]

【表1】 [Table 1]

【0027】[0027]

【表2】 [Table 2]

【0028】[0028]

【発明の効果】本発明によれば、電気特性に優れ、燃焼
性も機械的特性も満足するPBT樹脂組成物を得ること
ができ、これを用いた成形品は頻繁にアーク放電が発生
する状況においても、また、ほこりが多く、湿度の高い
状態に置かれる場合が想定される状況においても、優れ
た電気的特性を維持することができ、電気、電子分野で
安全性と信頼性の高い部品を構成する要素としてその効
果を発揮するものである。
EFFECTS OF THE INVENTION According to the present invention, a PBT resin composition having excellent electrical characteristics, satisfying both flammability and mechanical characteristics can be obtained, and a molded article using this PBT resin composition frequently causes arc discharge. In addition, it is possible to maintain excellent electrical characteristics even in a situation where it is assumed that it will be placed in a dusty, high-humidity state, and it is a safe and reliable component in the electrical and electronic fields. The effect is exhibited as an element that constitutes.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 (A)ポリブチレンテレフタレート樹脂
100重量部に対し、(B)臭素系難燃剤15〜30重
量部および、(C)酸化アンチモン化合物5〜10重量
部からなる組成物95〜75重量%と、(D)未焼成カ
オリン5〜25重量%とからなる難燃性ポリブチレンテ
レフタレート樹脂組成物。
1. A composition 95-75 comprising (A) 100 parts by weight of polybutylene terephthalate resin and (B) 15-30 parts by weight of a brominated flame retardant and (C) 5-10 parts by weight of an antimony oxide compound. A flame-retardant polybutylene terephthalate resin composition comprising 5% by weight and (D) 5 to 25% by weight unbaked kaolin.
JP26854893A 1993-10-27 1993-10-27 Polybutylene terephthalate resin composition Withdrawn JPH07118509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26854893A JPH07118509A (en) 1993-10-27 1993-10-27 Polybutylene terephthalate resin composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26854893A JPH07118509A (en) 1993-10-27 1993-10-27 Polybutylene terephthalate resin composition

Publications (1)

Publication Number Publication Date
JPH07118509A true JPH07118509A (en) 1995-05-09

Family

ID=17460067

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26854893A Withdrawn JPH07118509A (en) 1993-10-27 1993-10-27 Polybutylene terephthalate resin composition

Country Status (1)

Country Link
JP (1) JPH07118509A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005521767A (en) * 2002-03-28 2005-07-21 イメリーズ ミネラルズ リミテッド Flame retardant polymer composition comprising granular clay mineral
JP2009277566A (en) * 2008-05-16 2009-11-26 Fuji Electric Fa Components & Systems Co Ltd Resin processed article for arc extinguishment, and circuit breaker using the same
CN108603025A (en) * 2015-12-15 2018-09-28 英默里斯美国公司 Include the polymer composite compositions of hydrous kaolin

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005521767A (en) * 2002-03-28 2005-07-21 イメリーズ ミネラルズ リミテッド Flame retardant polymer composition comprising granular clay mineral
JP2009277566A (en) * 2008-05-16 2009-11-26 Fuji Electric Fa Components & Systems Co Ltd Resin processed article for arc extinguishment, and circuit breaker using the same
JP4529034B2 (en) * 2008-05-16 2010-08-25 富士電機機器制御株式会社 Arc extinguishing resin processed product and circuit breaker using the same
CN108603025A (en) * 2015-12-15 2018-09-28 英默里斯美国公司 Include the polymer composite compositions of hydrous kaolin
JP2018537577A (en) * 2015-12-15 2018-12-20 アイメリーズ ユーエスエー,インコーポレーテッド Polymer composite composition containing hydrous kaolin
US20180371207A1 (en) * 2015-12-15 2018-12-27 Imerys Usa, Inc. Polymer composite compositions including hydrous kaolin

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