JP4830206B2 - Flame retardant polybutylene terephthalate resin composition and molded article - Google Patents

Description

【００４２】
（上式において、Ａｒ¹、Ａｒ²、Ａｒ³、Ａｒ⁴は、同一または相異なる、ハロゲンを含有しない芳香族基を表す。また、Ｘは下記の（２）〜（４）式から選択される構造を示し、（２）〜（４）式中、Ｒ¹〜Ｒ⁸は同一または相異なる水素原子または炭素数１〜５のアルキル基を表し、Ｙは直接結合、Ｏ、Ｓ、ＳＯ₂、Ｃ（ＣＨ₃）₂、ＣＨ₂、ＣＨＰｈを表し、Ｐｈはフェニル基を表す。また、（１）式のｎは０以上の整数である。また、（１）式のｋ、ｍはそれぞれ０以上２以下の整数であり、かつ（ｋ＋ｍ）は０以上２以下の整数である。）なお、かかる芳香族燐酸エステルは、異なるｎや、異なる構造を有する芳香族燐酸エステルの混合物であってもよい。
【００４３】
【化６】

【００４４】
【化７】

【００４５】
【化８】

【００４６】
前記式（１）の式中ｎは０以上の整数であり、上限は難燃性の点から４０以下が好ましい。好ましくは０〜１０、特に好ましくは０〜５である。
【００４７】
またｋ、ｍは、それぞれ０以上２以下の整数であり、かつｋ＋ｍは、０以上２以下の整数であるが、好ましくはｋ、ｍはそれぞれ０以上１以下の整数、特に好ましくはｋ、ｍはそれぞれ１である。
【００４８】
また前記式（２）〜（４）の式中、Ｒ¹〜Ｒ⁸は同一または相異なる水素または炭素数１〜５のアルキル基を表す。ここで炭素数１〜５のアルキル基の具体例としては、メチル基、エチル基、ｎ−プロピル基、イソプロピル基、ｎ−ブチル基、ｓｅｃ−ブチル基、ｔｅｒｔ−ブチル基、ｎ−イソプロピル、ネオペンチル、ｔｅｒｔ−ペンチル基、２ーイソプロピル、ネオペンチル、ｔｅｒｔ−ペンチル基、３−イソプロピル、ネオペンチル、ｔｅｒｔ−ペンチル基、ネオイソプロピル、ネオペンチル、ｔｅｒｔ−ペンチル基などが挙げられるが、水素、メチル基、エチル基が好ましく、とりわけ水素が好ましい。
【００４９】
またＡｒ¹、Ａｒ²、Ａｒ³、Ａｒ⁴は同一または相異なる、ハロゲンを含有しない芳香族基を表す。かかる芳香族基としては、ベンゼン骨格、ナフタレン骨格、インデン骨格、アントラセン骨格を有する芳香族基が挙げられ、なかでもベンゼン骨格、あるいはナフタレン骨格を有するものが好ましい。これらはハロゲンを含有しない有機残基（好ましくは炭素数１〜８の有機残基）で置換されていてもよく、置換基の数にも特に制限はないが、１〜３個であることが好ましい。具体例としては、フェニル基、トリル基、キシリル基、クメニル基、メシチル基、ナフチル基、インデニル基、アントリル基などの芳香族基が挙げられるが、フェニル基、トリル基、キシリル基、クメニル基、ナフチル基が好ましく、特にフェニル基、トリル基、キシリル基が好ましい。
【００５０】
なかでも下記化合物（５）、（６）が好ましく、特に化合物（５）が好ましい。
【００５１】
【化９】

【００５２】
【化１０】

【００５３】
市販の燐酸エステルとしては、大八化学社製ＰＸ−２００、ＰＸ−２０１、ＰＸ−１３０、ＣＲ−７３３Ｓ、ＴＰＰ、ＣＲ−７４１、ＣＲ７４７、ＴＣＰ、ＴＸＰ、ＣＤＰから選ばれる１種または２種以上が使用することができ、好ましくはＰＸ−２００、ＴＰＰ、ＣＲ−７３３Ｓ、ＣＲ−７４１、ＣＲ７４７から選ばれる１種または２種以上、特に好ましくはＰＸ−２００、ＣＲ−７３３Ｓ、ＣＲ−７４１を使用することができるが、この中で特に好ましくはＰＸ−２００である。
【００５４】
また、（Ｃ）燐酸エステルの添加量は、難燃性と機械特性の点から（Ａ）成分１００重量部に対して、１〜１００重量部、好ましくは２〜９０重量部、より好ましくは３〜８０重量部である。
【００５５】
本発明における（Ｄ）トリアジン系化合物とシアヌール酸またはイソシアヌール酸の塩としては、シアヌール酸またはイソシアヌール酸とトリアジン系化合物との付加物が好ましく、通常は１対１（モル比）、場合により１対２（モル比）の組成を有する付加物である。トリアジン系化合物のうち、シアヌール酸またはイソシアヌール酸と塩を形成しないものは除外される。また、（Ｄ）トリアジン系化合物とシアヌール酸またはイソシアヌール酸との塩のうち、とくにメラミン、ベンゾグアナミン、アセトグアナミン、２−アミド−４，６−ジアミノ−１，３，５−トリアジン、モノ（ヒドロキシメチル）メラミン、ジ（ヒドロキシメチル）メラミン、トリ（ヒドロキシメチル）メラミンの塩が好ましく、とりわけメラミン、ベンゾグアナミン、アセトグアナミンの塩が好ましく、公知の方法で製造されるが、例えば、トリアジン系化合物とシアヌール酸またはイソシアヌール酸の混合物を水スラリーとし、良く混合して両者の塩を微粒子状に形成させた後、このスラリーを濾過、乾燥後に一般には粉末状で得られる。また、上記の塩は完全に純粋である必要は無く、多少未反応のトリアジン系化合物ないしシアヌール酸、イソシアヌール酸が残存していても良い。また、樹脂に配合される前の塩の平均粒径は、成形品の難燃性、機械的強度や耐湿熱特性、滞留安定性、表面性の点から１００〜０．０１μｍが好ましく、更に好ましくは８０〜１μｍである。また、上記の塩の分散性が悪い場合には、トリス（β−ヒドロキシエチル）イソシアヌレートなどの分散剤や公知の表面処理剤などを併用してもかまわない。
【００５６】
また、（Ｄ）トリアジン系化合物とシアヌール酸またはイソシアヌール酸の塩の配合量は、難燃性と機械特性の点から（Ａ）成分１００重量部に対して、１〜１５０重量部、好ましくは２〜１４０重量部、更に好ましくは３〜１３０重量部である。
【００５７】
本発明で用いる（Ｅ）アルカリ土類金属化合物におけるアルカリ土類金属としてはマグネシウム、カルシウム、およびバリウムなどが好ましく挙げられる。また、アルカリ土類金属化合物としては、これらアルカリ土類金属の水酸化物、酸化物、炭酸塩、硫酸塩、酢酸塩、リン酸塩等の無機酸塩、酢酸塩、乳酸塩、オレイン酸、パルミチン酸、ステアリン酸およびモンタン酸などの有機酸塩が好ましい。具体例としては水酸化マグネシウム、水酸化カルシウム、水酸化バリウム、酸化マグネシウム、酸化カルシウム、酸化バリウム、炭酸マグネシウム、炭酸カルシウム、炭酸バリウム、硫酸マグネシウム、硫酸カルシウム、硫酸バリウム、リン酸マグネシウム、リン酸カルシウム、リン酸バリウム、酢酸マグネシウム、酢酸カルシウム、酢酸バリウム、乳酸マグネシウム、乳酸カルシウム、乳酸バリウム、さらにはオレイン酸、パルミチン酸、ステアリン酸およびモンタン酸などの有機酸のマグネシウム塩、カルシウム塩、およびバリウム塩などが挙げられ、水酸化マグネシウムおよび炭酸カルシウムが好ましく用いられ、より好ましくは炭酸カルシウムが用いられる。かかるアルカリ土類金属は１種または２種以上で用いることができる。また、上記の炭酸カルシウムは製造方法により、コロライド炭酸カルシウム、軽質炭酸カルシウム、重質炭酸カルシウム、湿式粉砕微粉重質炭酸カルシウム、湿式重質炭酸カルシウム（白亜）などが知られており、いずれも本発明に包含される。また、上記の炭酸カルシウムおよびアルカリ土類金属塩は、シランカップリング剤、有機物および無機物などの一種以上の表面処理剤で処理されていても良く、形状は粉末状、板状あるいは繊維状であっても構わないが、１０μｍ以下の粉末状で用いることが分散性などから好ましい。
【００５８】
（Ｅ）アルカリ土類金属化合物を添加することにより、加水分解特性を著しく向上させることができる。非ハロゲン難燃剤として有効な燐酸エステル系化合物は燐酸エステル結合が加水分解され易いため、耐加水分解性に劣るという欠点を有している。本発明では、ビニル系樹脂によるブリードアウト防止と本アルカリ土類金属化合物による酸トラップの相乗作用により大きく耐加水分解性が改良されているものと推察される。
【００５９】
また（Ｅ）アルカリ土類金属化合物の配合量は、機械特性と耐加水分解性の点から（Ａ）成分１００重量部に対して、０．１〜１０重量部、好ましくは０．２〜９重量部、更に好ましくは０．３〜８重量部である。
【００６０】
本発明においては、さらに（Ｆ）エポキシ化合物を配合することができる。かかるエポキシ化合物としては、グリシジルエステル化合物、グリシジルエーテル化合物、およびグリシジルエステルエーテル化合物が挙げられ、これらは一種以上で用いることができる。
【００６１】
また、ＰＢＴの耐加水分解性に優れた改善効果を発現するには、エポキシ当量５００未満のエポキシ化合物が好ましく、さらにはエポキシ当量４００未満のエポキシ化合物が特に好ましい。ここで、エポキシ当量とは、１グラム当量のエポキシ基を含むエポキシ化合物のグラム数であり、エポキシ当量は、エポキシ化合物をピリジンに溶解し、０．０５Ｎ塩酸を加え４５℃で加熱後、指示薬にチモールブルーとクレゾールレツドの混合液を用い、０．０５Ｎ苛性ソーダで逆滴定する方法により求めることができる。
【００６２】
また、上記のエポキシ化合物としては、単官能のグリシジルエステル化合物とグリシジルエーテル化合物を併用したエポキシ化合物あるいは単官能のグリシジルエステル化合物が好ましく用いられ、とくに、得られる組成物の粘度安定性と耐加水分解性のバランスから単官能のグリシジルエステル化合物がより好ましい。
【００６３】
また、上記のグリシジルエステル化合物としては、限定されるものではないが、具体例として、安息香酸グリシジルエステル、ｔＢｕ−安息香酸グリシジルエステル、Ｐ−トルイル酸グリシジルエステル、シクロヘキサンカルボン酸グリシジルエステル、ペラルゴン酸グリシジルエステル、ステアリン酸グリシジルエステル、ラウリン酸グリシジルエステル、パルミチン酸グリシジルエステル、ベヘン酸グリシジルエステル、バーサティク酸グリシジルエステル、オレイン酸グリシジルエステル、リノール酸グリシジルエステル、リノレイン酸グリシジルエステル、ベヘノール酸グリシジルエステル、ステアロール酸グリシジルエステル、テレフタル酸ジグリシジルエステル、イソフタル酸ジグリシジルエステル、フタル酸ジグリシジルエステル、ナフタレンジカルボン酸ジグリシジルエステル、ビ安息香酸ジグリシジルエステル、メチルテレフタル酸ジグリシジルエステル、ヘキサヒドロフタル酸ジグリシジルエステル、テトラヒドロフタル酸ジグリシジルエステル、シクロヘキサンジカルボン酸ジグリシジルエステル、アジピン酸ジグリシジルエステル、コハク酸ジグリシジルエステル、セバシン酸ジグリシジルエステル、ドデカンジオン酸ジグリシジルエステル、オクタデカンジカルボン酸ジグリシジルエステル、トリメリット酸トリグリシジルエステル、ピロメリット酸テトラグリシジルエステルなどが挙げられ、これらは１種または２種以上を用いることができる。
【００６４】
また、上記のグリシジルエ−テル化合物としては、限定されるものではないが、具体例として、フェニルグリシジルエ−テル、Ｏ−フェニルフェニルグリシジルエ−テル、１，４−ビス（β,γ−エポキシプロポキシ）ブタン、１，６−ビス（β,γ−エポキシプロポキシ）ヘキサン、１，４−ビス（β,γ−エポキシプロポキシ）ベンゼン、１−（β,γ−エポキシプロポキシ）−２−エトキシエタン、１−（β,γ−エポキシプロポキシ）−２−ベンジルオキシエタン、２，２−ビス−［р−（β,γ−エポキシプロポキシ）フェニル］プロパンおよびビス−（４−ヒドロキシフェニル）メタンなどのその他のビスフェノールとエピクロルヒドリンの反応で得られるジグリシジルエーテルなどが挙げられ、これらは１種または２種以上を用いることができる。
【００６５】
また、（Ｆ）エポキシ化合物の配合量は機械特性と耐加水分解性の面から（Ａ）成分１００重量部に対して０．０５〜１０重量部が好ましく、特に好ましくは０．１〜９重量部である。
【００６６】
一般に、エポキシ化合物を使用することでポリブチレンテレフタレート樹脂の末端カルボキシル基を封鎖し、ポリブチレンテレフタレート樹脂の耐加水分解性を向上させることは知られているが、本発明では、ビニル系樹脂、アルカリ土類金属化合物、および本エポキシ化合物を併用すると、相乗的に耐加水分解性が向上し、単なるエポキシ化合物の添加では到底達成しえない高度の耐加水分解性を付与することが可能となる。
【００６７】
本発明においては、さらに繊維強化材を配合することによって、高い強度の樹脂を得ることができ、繊維強化材としては、ガラス繊維、アラミド繊維、および炭素繊維などが挙げられる。上記のガラス繊維としては、通常のＰＢＴの強化材に使用されるチョップドストランドタイプやロービングタイプのガラス繊維でありアミノシラン化合物やエポキシシラン化合物などのシランカップリング剤および／またはウレタン、酢酸ビニル、ビスフェノールＡジグリシジルエーテル、ノボラック系エポキシ化合物などの一種以上のエポキシ化合物などを含有した集束剤で処理されたガラス繊維が好ましく用いられる。また、上記のシランカップリング剤および／または集束剤はエマルジョン液で使用されていても良い。
【００６８】
また、上記の繊維強化材の配合量は難燃性、成形時の流動性の点から（Ａ）成分１００重量部に対して、１〜２５０重量部が好ましく、特に好ましくは２〜２３０重量部である。
【００６９】
また、本発明においてはさらに無機充填剤を配合することができ、本発明組成物の結晶化特性、耐アーク性、異方性、機械強度、難燃性あるいは熱変形温度などの一部を改良するものであり、かかる無機充填剤としては、限定されるものではないが針状、粒状、粉末状および層状の無機充填剤が挙げられ、具体例としては、ガラスビーズ、ミルドファイバー、ガラスフレーク、チタン酸カリウィスカー、ワラステナイト、シリカ、カオリナイト、タルク、スメクタイト系粘土鉱物（モンモリロナイト、ヘクトライト）、バーミキュライト、マイカ、フッ素テニオライト、燐酸ジルコニウム、燐酸チタニウム、およびドロマイトなどが挙げられ、一種以上で用いられる。また、上記の無機充填剤には、カップリング剤処理、エポキシ化合物、あるいはイオン化処理などの表面処理が行われていても良い。また、粒状、粉末状および層状の無機充填剤の平均粒径は衝撃強度の点から０．１〜２０μｍであることが好ましく、特に０．２〜１０μｍであることが好ましい。また、無機充填剤の配合量は、繊維強化剤の配合量を越えない量が好ましい。
【００７０】
本発明においては、さらにフッ素系樹脂を配合することにより、燃焼時の難燃性樹脂組成物が溶融落下することを抑制し、さらに難燃性を向上させることができる。上記のフッ素系樹脂とは、物質分子中にフッ素を含有する樹脂であり、具体的には、ポリテトラフルオロエチレン、ポリヘキサフルオロプロピレン、（テトラフルオロエチレン／ヘキサフルオロプロピレン）共重合体、（テトラフルオロエチレン／パーフルオロアルキルビニルエーテル）共重合体、（テトラフルオロエチレン／エチレン）共重合体、（ヘキサフルオロプロピレン／プロピレン）共重合体、ポリビニリデンフルオライド、（ビニリデンフルオライド／エチレン）共重合体などが挙げられるが、中でもポリテトラフルオロエチレン、（テトラフルオロエチレン／パーフルオロアルキルビニルエーテル）共重合体、（テトラフルオロエチレン／ヘキサフルオロプロピレン）共重合体、（テトラフルオロエチレン／エチレン）共重合体、ポリビニリデンフルオライドが好ましく、特にポリテトラフルオロエチレン、（テトラフルオロエチレン／エチレン）共重合体が好ましい。また、フッ素系樹脂の配合量は、難燃性と機械特性の点から（Ａ）成分１００重量部に対して、０．０２〜２０重量部、好ましくは０．１〜１８重量部、更に好ましくは０．２〜１６重量部である。
【００７１】
本発明においては、さらにポリカーボネート樹脂を配合することにより、さらに難燃性を向上させることができる。上記のポリカーボネート樹脂としては、芳香族二価フェノール系化合物とホスゲン、または炭酸ジエステルとを反応させることにより得られる芳香族ホモまたはコポリカーボネートが挙げられる。該芳香族ホモまたはコポリカーボネート樹脂は、粘度平均分子量が通常、１００００〜１００００００の範囲のものであり、粘度平均分子量が１００００〜１００００００の範囲であれば、粘度平均分子量の異なるポリカーボネート樹脂を併用しても良い。ここで二価フェノール系化合物としては、２，２−ビス（４−ヒドロキシフェニル）プロパン、２，２−ビス（４−ヒドロキシ−３，５−ジメチルフェニル）プロパン、ビス（４−ヒドロキシフェニル）メタン、１，１−ビス（４−ヒドロキシフェニル）エタン、２，２−ビス（４−ヒドロキシフェニル）ブタン、２，２−ビス（４−ヒドロキシ−３，５−ジフェニル）ブタン、２，２−ビス（４−ヒドロキシ−３，５−ジエチルフェニル）プロパン、２，２−ビス（４−ヒドロキシ−３，５−ジエチルフェニル）プロパン、１，１−ビス（４−ヒドロキシフェニル）シクロヘキサン、１−フェニル−１，１−ビス（４−ヒドロキシフェニル）エタン等が使用でき、これら単独あるいは混合物として使用することができる。また、ポリカーボネート樹脂の配合量は、難燃性と機械特性の点から（Ａ）成分１００重量部に対して、１〜１００重量部が好ましく、特に好ましくは２〜９０重量部である。
【００７２】
本発明においては、さらにシリコーン化合物、フェノール樹脂、ホスホニトリル化合物、ポリ燐酸アンモニウム、および燐酸メラミンなどの難燃性を助ける難燃助剤を配合でき、１種以上で用いられる。また、上記の難燃助剤の配合量は、難燃性と機械特性の点から（Ａ）成分１００重量部に対して、１〜１００重量部が好ましく、特に好ましくは２〜９０重量部である。
【００７３】
上記のシリコーン化合物としては、シリコーン樹脂、シリコーンオイルおよびシリコーンパウダーが挙げられる。
【００７４】
上記のシリコーン樹脂としては、飽和または不飽和一価炭化水素基、水素原子、ヒドロキシル基、アルコキシル基、アリール基、ビニルまたはアリル基から選ばれる基とシロキサンが化学的に結合されたポリオルガノシロキサンが挙げられ、室温で約２００〜３００００００００センチポイズの粘度を有するものが好ましいが、上記のシリコーン樹脂である限り、それに限定されるものではなく、製品形状がオイル状、パウダー状およびガム状であっても良く、官能基としてエポキシ基、メタクル基およびアミノ基が導入されていても良く、２種以上のシリコーン樹脂との混合物であっても良い。
【００７５】
また、シリコーンオイルとしては、飽和または不飽和一価炭化水素基、水素原子、ヒドロキシル基、アルコキシル基、アリール基、ビニルまたはアリル基から選ばれる基とシロキサンが化学的に結合されたポリオルガノシロキサンが挙げられ、室温で約０．６５〜１０００００センチストークスの粘度を有するものが好ましいが、上記のシリコーンオイル樹脂である限り、それに限定されるものではなく、製品形状がオイル状、パウダー状およびガム状であっても良く、官能基としてエポキシ基、メタクル基およびアミノ基が導入されていても良く、２種以上のシリコーンオイルあるいはシリコーン樹脂との混合物であっても良い。
【００７６】
また、シリコーンパウダーとしては、上記のシリコーン樹脂および／またはシリコーンオイルに無機充填剤を配合したものなどが挙げられ、無機充填剤としてはシリカなどが好ましく用いられる。
【００７７】
上記のフェノール樹脂としては、フェノール性水酸基を複数有する高分子であれば任意であり、例えばノボラック型、レゾール型および熱反応型の樹脂、あるいはこれらを変性した樹脂が挙げられる。これらは硬化剤未添加の未硬化樹脂、半硬化樹脂、あるいは硬化樹脂であってもよい。中でも、硬化剤未添加で、非熱反応性であるノボラック型フェノール樹脂が難燃性、機械特性、経済性の点で好ましい。
【００７８】
また、形状は特に制限されず、粉砕品、粒状、フレーク状、粉末状、針状、液状などいずれも使用でき、必要に応じ、１種または２種以上使用することができる。また、フェノール系樹脂は特に限定するものではなく市販されているものなどが用いられる。例えば、ノボラック型フェノール樹脂の場合、フェノール類とアルデヒド類のモル比を１：０．７〜１：０．９となるような比率で反応槽に仕込み、更にシュウ酸、塩酸、硫酸、トルエンスルホン酸等の触媒を加えた後、加熱し、所定の時間還流反応を行う。生成した水を除去するため真空脱水あるいは静置脱水し、更に残っている水と未反応のフェノール類を除去する方法により得ることができる。これらの樹脂あるいは複数の原料成分を用いることにより得られる共縮合フェノール樹脂は単独あるいは二種以上用いることができる。
【００７９】
また、レゾール型フェノール樹脂の場合、フェノール類とアルデヒド類のモル比を１：１〜１：２となるような比率で反応槽に仕込み、水酸化ナトリウム、アンモニア水、その他の塩基性物質などの触媒を加えた後、ノボラック型フェノール樹脂と同様の反応および処理をして得ることができる。
【００８０】
ここで、フェノール類としてはフェノール、ｏ−クレゾール、ｍ−クレゾール、ｐ−クレゾール、チモール、ｐ−ｔｅｒｔ−ブチルフェノール、ｔｅｒｔ−ブチルカテコール、カテコール、イソオイゲノール、ｏ−メトキシフェノール、４，４’−ジヒドロキシフェニル−２，２−プロパン、サルチル酸イソアミル、サルチル酸ベンジル、サルチル酸メチル、２，６−ジ−ｔｅｒｔ−ブチル−ｐ−クレゾール等が挙げられる。これらのフェノール類は一種または二種以上用いることができる。一方、アルデヒド類としてはホルムアルデヒド、パラホルムアルデヒド、ポリオキシメチレン、トリオキサン等が挙げられる。これらのアルデヒド類は必要に応じて一種または二種以上用いることができる。
【００８１】
フェノール系樹脂の分子量は、特に限定されないが好ましくは数平均分子量で２００〜２，０００であり、特に４００〜１，５００の範囲のものが機械的物性、流動性、経済性に優れ好ましい。なおフェノール系樹脂の分子量は、テトラヒドラフラン溶液、ポリスチレン標準サンプルを使用することによりゲルパーミエションクロマトグラフィ法で測定できる。
【００８２】
上記のホスホニトリル化合物としては、ホスホニトリル線状ポリマー及び／または環状ポリマーを主成分とするホスホニトリル化合物が挙げられ、直鎖状、環状のいずれかあるいは混合物であってもかまわない。前記ホスホニトリル線状ポリマー及び／または環状ポリマーは、著者梶原『ホスファゼン化合物の合成と応用』などに記載されている公知の方法で合成することができ、例えば、りん源として五塩化リンあるいは三塩化リン、窒素源として塩化アンモニウムあるいはアンモニアガスを公知の方法で反応させて（環状物を精製してもよい）、得られた物質をアルコール、フェノールおよびアミン類で置換することで合成することができる。
【００８３】
上記のポリ燐酸アンモニウムとしては、ポリ燐酸アンモニウム、メラミン変性ポリ燐酸アンモニウム、およびカルバミルポリ燐酸アンモニウムなどが挙げられ、熱硬化性を示すフェノール樹脂、ウレタン樹脂、メラミン樹脂、尿素樹脂、エポキシ樹脂、およびユリア樹脂などの熱硬化性樹脂などによって被覆されていても良く、１種で用いても２種以上で用いても良い。
【００８４】
上記の燐酸メラミンとしては、燐酸メラミンやピロ燐酸メラミンなどの燐酸塩が挙げられ、１種で用いても２種以上で用いても良い。
【００８５】
本発明においては、さらに本発明組成物の衝撃強度などの靱性を改良する目的でエチレン（共）重合体を配合することができ、かかるエチレン（共）重合体としては、高密度ポリエチレン、低密度ポリエチレン、超低密度ポリエチレンなどのエチレン重合体および／またはエチレン共重合体が挙げられ、上記のエチレン共重合体とは、エチレンおよびそれと共重合可能なモノマーを共重合して得られるものであり、共重合可能なモノマーとしてはプロピレン、ブテン−１、酢酸ビニル、イソプレン、ブタジエンあるいはアクリル酸、メタクリル酸等のモノカルボン酸類あるいはこれらのエステル酸類、マレイン酸、フマル酸あるいはイタコン酸等のジカルボン酸類等が挙げられる。エチレン共重合体は通常公知の方法で製造することが可能である。エチレン共重合体の具体例としては、エチレン／プロピレン、エチレン／ブテン１、エチレン／酢酸ビニル、エチレン／エチルアクリレート、エチレン／メチルアクリレートおよびエチレン／メタクリル酸エチルアクリレートなどが挙げられる。また、上記のエチレン（共）重合体に不飽和酸無水物あるいはグリシジルメタクリレートをグラフト重合もしくは共重合された共重合体も好ましく用いられる。これらは一種または二種以上で使用され、上記のエチレン（共）重合体の一種以上と混合して用いても良い。また、エチレン（共）重合体のなかでもポリエチレンに不飽和酸無水物あるいはグリシジルメタクリレートがグラフト重合もしくは共重合された共重合体がＰＢＴとの相溶性が良く好ましく用いられる。 また、エチレン（共）重合体の配合量は、得られる組成物の難燃性と衝撃強度の点から（Ａ）成分１００重量部に対して、１〜１００重量部が好ましく、特に好ましくは２〜９０重量部である。
【００８６】
本発明においては、さらに耐加水分解性を改良する目的でフェノキシ樹脂、オキサゾリン化合物、およびカルボジイミド化合物などを配合でき、とくにフェノキシ樹脂が好ましく用いられる。また、上記の耐加水分解性改良材の添加量は、得られる組成物の耐加水分解性と難燃性の点から（Ａ）成分１００重量部に対して、０．１〜２０重量部が好ましく、とくに好ましくは０．２〜１８重量部である。
【００８７】
また、上記のフェノキシ樹脂としては、芳香族二価フェノール系化合物とエピクロルヒドリンとを各種の配合割合で反応させることにより得られるフェノキシ樹脂が挙げられる。フェノキシ共重合体の分子量は特に制限はないが、粘度平均分子量が１０００〜１０００００の範囲のものでである。ここで、芳香族二価フェノール系化合物 の例としては、２，２−ビス（４−ヒドロキシフェニル）プロパン、２，２−ビス（４−ヒドロキシ−３，５−ジメチルフェニル）プロパン、ビス（４−ヒドロキシフェニル）メタン、１，１−ビス（４−ヒドロキシフェニル）エタン、２，２−ビス（４−ヒドロキシ−３，５ジエチルフェニル）プロパン、１，１−ビス（４−ヒドロキシフェニル）シクロヘキサン、１−フェニル−１，１−ビス（４−ヒドロキシフェニル）エタン等が使用でき、これら単独あるいは混合物として使用することができる。また、形状は特に制限されず、粉砕品、粒状、フレーク状、粉末状、液状などいずれも使用できる。これらのフェノキシ樹脂は必要に応じて一種または二種以上用いることができる。
【００８８】
本発明においては、さらに本発明の組成物が長期間高温にさらされても極めて良好な耐熱エージング性を与える安定剤としてヒンダードフェノール系酸化防止剤および／またはホスファイト系酸化防止剤を配合でき、ヒンダードフェノール系酸化防止剤および／またはホスファイト系酸化防止剤の配合量は、耐熱エージング性と難燃性の点から（Ａ）成分１００重量部に対して、０．１〜１５重量部が好ましく、特に好ましくは０．２〜１０重量部である。
【００８９】
また、上記のヒンダードフェノール系酸化防止剤の具体例としては、トリエチレングリコール−ビス［３−（３−ｔ−ブチル−５−メチル−４−ヒドロキシフェニル）プロピオネート］、１，６−ヘキサンジオール−ビス［３−（３，５−ジ−ｔ−ブチル−４−ヒドロキシフェニル）プロピオネート］、ペンタエリスリチル−テトラキス［３−（３，５−ジ−ｔ−ブチル−４−ヒドロキシフェニル）プロピオネート］、２，２−チオ−ジエチレンビス［３−（３，５−ジ−ｔ−ブチル−４−ヒドロキシフェニル）プロピオネート］、オクタデシル−３−（３，５−ジ−ｔ−ブチル−４−ヒドロキシフェニル）プロピオネート、３，５−ジ−ｔ−ブチル−４−ヒドロキシベンジルホスホネート ジエチルエステル、１，３，５−トリメチル−２，４，６−トリス（３，５−ジ−ｔ−ブチル−４−ヒドロキシベンジル）ベンゼン、ビスもしくはトリス（３−ｔ−ブチル−６−メチル−４−ヒドロキシフェニル）プロパン、Ｎ，Ｎ’−ヘキサメチレンビス（３，５−ジ−ｔ−ブチル−４−ヒドロキシ−ヒドロシンナマミド）、Ｎ，Ｎ’−トリメチレンビス（３，５−ジ−ｔ−ブチル−４−ヒドロキシ−ヒドロシンナマミド）などが挙げられる。
【００９０】
また、上記のホスファイト系安定剤との例としては、トリス（２，４−ジ−ｔ−ブチルフェニル）ホスファイト、２，２−メチレンビス（４，６−ジ−ｔ−ブチルフェニル）オクチルホスファイト、トリスノニルフェニルホスファイト、アルキルアリル系ホスファイト、トリアルキルホスファイト、トリアリルホスファイト、ペンタエリスリトール系ホスファイト化合物などが挙げられる。
【００９１】
本発明においては、さらに滑剤を一種以上添加することにより成形時の流動性や離型性を改良することが可能である。かかる滑剤としては、ステアリン酸カルウシム、ステアリン酸バリウムなどの金属石鹸、脂肪酸エステル、脂肪酸エステルの塩（一部を塩にした物も含む）、エチレンビスステアロアマイドなどの脂肪酸アミド、エチレンジアミンとステアリン酸およびセバシン酸からなる重縮合物あるいはフェニレンジアミンとステアリン酸およびセバシン酸の重縮合物からなる脂肪酸アミド、ポリアルキレンワックス、酸無水物変性ポリアルキレンワックスおよび上記の滑剤とフッ素系樹脂やフッ素系化合物の混合物が挙げられるがこれに限定されるものではない。滑剤の添加量は、（Ａ）成分１００重量部に対して、０．０５〜１０重量部であることが好ましく、より好ましくは０．１〜５重量部である。
【００９２】
本発明においては、さらに、カーボンブラック、酸化チタン、および種々の色の顔料や染料を１種以上配合することにより色調を改良あるいは調色することも可能であり、配合量は、得られる組成物の機械特性の点から（Ａ）成分１００重量部に対して０．１〜３０重量部が好ましく、より好ましくは０．１〜２０重量部、さらに好ましくは０．１〜１５重量部である。
【００９３】
また、上記のカーボンブラックとしては、チャンネルブラック、ファーネスブラック、アセチレンブラック、アントラセンブラック、油煙、松煙、および、黒鉛などが挙げられ、平均粒径５００ｎｍ以下、ジブチルフタレート吸油量５０〜４００ｃｍ³／１００ｇのカーボンブラックが好ましく用いられ、処理剤として酸化アルミニウム、酸化珪素、酸化亜鉛、酸化ジルコニウム、ポリオール、シランカップリング剤などで処理されていても良い。また、上記の酸化チタンとしは、ルチル形、あるいはアナターゼ形などの結晶形を持ち、平均粒子径５μｍ以下のカーボンブラックが好ましく用いられ、処理剤として酸化アルミニウム、酸化珪素、酸化亜鉛、酸化ジルコニウム、ポリオール、シランカップリング剤などで処理されていても良い。また、上記のカーボンブラック、酸化チタン、および種々の色の顔料や染料は、本発明の難燃性樹脂組成物との分散性向上や製造時のハンドリング性の向上から種々の熱可塑性樹脂と溶融ブレンドあるいは単にブレンドした混合材料として用いても良い。とくに、上記の熱可塑性樹脂としては、ポリアルキレンテレフタレート、ビニル系樹脂あるいはエチレン（共）重合体であることが耐トラッキング性などの電気特性から好ましい。
【００９４】
本発明においては、さらに本発明以外の公知の非ハロゲン難燃剤を一種以上添加することが可能であり、燃焼時の燃焼時間短縮もしくは燃焼時の発生ガスの低減が期待できる。かかる公知の非ハロゲン難燃剤としては、限定されるものではないが、例えば、水酸化アルミニウム、ハイドロタルサイト、硼酸、硼酸カルシウム、硼酸カルシウム水和物、硼酸亜鉛、硼酸亜鉛水和物、水酸化亜鉛、水酸化亜鉛水和物、亜鉛錫水酸化物、亜鉛錫水酸化物水和物、赤リン、加熱膨張黒鉛およびドーソナイトなどが挙げられ、熱硬化性メラミン樹脂、熱硬化性フェノール樹脂、熱硬化性エポキシ樹脂などの熱硬化性樹脂が混合あるいは表面に被覆されていても良い。また、カップリング剤、エポキシ化合物、あるいはステアリン酸などの油脂類などが混合あるいは表面に被覆されていても良い。
【００９５】
さらに、本発明の難燃性ポリブチレレンテレフタレート樹脂組成物および成形品に対して本発明の目的を損なわない範囲で、イオウ系酸化防止剤、紫外線吸収剤、可塑剤、および帯電防止剤などの公知の添加剤を１種以上配合された材料も用いることができる。
【００９６】
本発明の難燃性ポリブチレンテレフタレート樹脂組成物および成形品は通常公知の方法で製造される。例えば、（Ａ）ポリブチレンテレフタレート樹脂またはポリブチレンテレフタレート樹脂とポリエチレンテレフタレート樹脂、（Ｂ）ビニル系樹脂、（Ｃ）燐酸エステル、（Ｄ）トリアジン系化合物とシアヌール酸またはイソシアヌール酸との塩、（Ｅ）アルカリ土類金属化合物、および必要に応じて、繊維強化材、フッ素系化合物、ポリカーボネート樹脂、シリコーン化合物、フェノール樹脂、ホスホニトリル化合物、ポリ燐酸アンモニウム、および燐酸メラミンなどの難燃助剤、エチレン（共）重合体、繊維強化材以外の無機充填剤、耐加水分解性改良材、ヒンダードフェノール系酸化防止剤および／またはホスファイト系酸化防止剤、およびさらに必要に応じてその他の必要な添加剤を予備混合して、またはせずに押出機などに供給して十分溶融混練することにより難燃性ポリブチレンテレフタレート樹脂組成物が調製される。
【００９７】
上記の予備混合の例として、ドライブレンドするだけでも本発明の効果が発揮できるが、タンブラー、リボンミキサーおよびヘンシェルミキサー等の機械的な混合装置を用いて混合することが挙げられる。また、繊維強化材は、二軸押出機などの多軸押出機の元込め部とベント部の途中にサイドフィダーを設置して添加する方法であっても良い。また、液体の添加剤の場合は、二軸押出機などの多軸押出機の元込め部とベント部の途中に液添ノズルを設置してプランジャーポンプ添加する方法や元込め部などから定量ポンプで供給する方法なとであっても良い。 また、難燃性ポリブチレンテレフタレート樹脂組成物を製造するに際し、限定されるものではないが、例えば“ユニメルト”あるいは“ダルメージ”タイプのスクリューを備えた単軸押出機、二軸押出機、三軸押出機およびニーダータイプの混練機などを用いることができる。
【００９８】
かくして得られる難燃性ポリブチレンテレフタレート樹脂組成物は、通常公知の方法で成形することができ、例えば射出成形、押出成形、圧縮成形、シート成形、フィルム成形などによって、あらゆる形状の成形品とすることができ、なかでも射出成形が好適であり、金属部品の一部を直接成形品と一体化させるインサート成形による射出成形方法で得られる成形品であっても良い。
【００９９】
また、本発明の難燃性ポリブチレンテレフタレート樹脂組成物からなる成形品は、機器内部の電気火炎に対する安全性、成形品自体の火災に対する安全性、成形品外観、機械特性、および耐加水分解性などに優れているため、電気・電子部品、機械機構部品、および自動車部品に有用である。具体的には、一般家庭電化製品、ＯＡ機器などのハウジング、コイルボビン、コネクター、リレー、ディスクドライブシャーシー、トランス、電磁開閉器、スイッチ部品、コンセント部品、モーター部品、ソケット、プラグ、コンデンサー、各種ケース類、抵抗器、金属端子や導線が組み込まれる電気・電子部品、コンピューター関連部品、音響部品、レーザーディスクなどの音声部品、照明部品、電信・電話機器関連部品、エアコン部品、ＶＴＲやテレビなどの家電部品、複写機用部品、ファクシミリ用部品、光学機器用部品、自動車点火装置部品、自動車用コネクター、および各種自動車用電装部品などが挙げられる。
【０１００】
本発明においては、特に耐加水分解性に優れた高い難燃性の成形品が得られることから、電気・電子部品、および自動車用電装部品にとりわけ有用である。
【０１０１】
【実施例】
以下実施例により本発明の効果を更に詳細に説明する。ここで％および部とはすべて重量％および重量部をあらわす。各特性の測定方法は以下の通りである。
【０１０２】
参考例１（Ａ）ポリブチレンテレフタレート樹脂
＜Ａ−１＞ポリブチレンテレフタレート樹脂（以下、ＰＢＴと略す）である東レＰＢＴ−１１００Ｓ（東レ社製）を用いた。
【０１０３】
参考例２ ポリエチレンテレフタレート樹脂
＜Ａ−２＞三井ＰＥＴＪ００５（三井ペット樹脂社製）固有粘度が０．６５ のポリエチレンテレフタレート樹脂（以下、ＰＥＴと略す）を用いた。
【０１０４】
参考例３（Ｂ）ビニル系樹脂
＜Ｂ−１＞スチレン／アクリロニトリル（７４／２６重量％）共重合体のＡＳ樹脂を用いた。なお、本ＡＳ樹脂のメチルエチルケトン溶媒、３０℃で測定した極限粘度は０．５２ｄｌ／ｇであった。
【０１０５】
＜Ｂ−２＞スチレン／アクリロニトリル／グリシジルメタクリレート（７４／２５．５／０．５重量％）共重合体を用いた（以下エポキシ変性ＡＳ樹脂と略す）。なお、本エポキシ変性ＡＳ樹脂のメチルエチルケトン溶媒、３０℃で測定した極限粘度は０．５３ｄｌ／ｇであった。
【０１０６】
＜Ｂ−３＞エポキシ変成スチレン／ブタジエン共重合体（ダイセル化学工業社製“エポフレンド”Ａ１０１０）を用いた（以下エポキシ変性ＳＢＳ樹脂と略す）。
【０１０７】
参考例４（Ｃ）燐酸エステル
＜Ｃ−１＞下記の（５）式の芳香族燐酸エステル“ＰＸ−２００”（大八化学社製）を用いた。
【０１０８】
【化１１】

【０１０９】
＜Ｃ−２＞下記の（６）式の芳香族燐酸エステル“ＣＲ７４１”（大八化学 社製）を用いた。
【０１１０】
【化１２】

【０１１１】
参考例５（Ｄ）トリアジン系化合物とシアヌール酸またはイソシアヌール酸との塩
＜Ｄ−１＞メラミンシアヌレート“ＭＣＡ”（三菱化学社製）を用いた（以 下、ＭＣ塩と略す）。
【０１１２】
参考例６（Ｅ）アルカリ土類金属化合物
＜Ｅ−１＞水酸化マグネシウム“キスマ６Ｅ”（共和化学工業社製）を用いた（以下、水マグと略す）。
【０１１３】
＜Ｅ−２＞炭酸カルシウム“ＫＳＳ１０００”（同和カルファイン社製）を用いた（以下、炭カルと略す）。
【０１１４】
参考例７（Ｆ）エポキシ化合物
＜Ｆ−１＞バーサティク酸のグリシジルエステル“カージュラＥ１０”（ジャパンエポキシレジン社製）を用いた。
【０１１５】
＜Ｆ−２＞ビスフェノールＡジグリシジルエーテル“エピコート８２８”（ジャパンエポキシレジン社製）を用いた。
【０１１６】
＜Ｆ−３＞＜Ｆ−１＞２０重量％と＜Ｆ−２＞８０重量％を混合したエポキシ化合物
参考例８ 繊維強化材
＜Ｇ−１＞繊維径約１０μｍのチョップドストランド状のガラス繊維“ＣＳ３Ｊ９４８”（日東紡績社製）を用いた（以下、ＧＦと略す）。
【０１１７】
参考例９ フッ素系化合物
＜Ｈ−１＞ポリテトラフルオロエチレン“テフロン６Ｊ”（三井デュポンフ ロロケミカル社製）を用いた（以下、テフロンと略す）。
【０１１８】
参考例１０ 難燃助剤
＜Ｉ−１＞ポリカーボネート樹脂
“ユーピロン”Ｓ３０００（三菱エンジニアリングプラスチックス社製）を使用した（以下、ＰＣ樹脂と略す）。
【０１１９】
＜Ｉ−２＞シリコーン化合物としてシリコーンパウダー“ＤＣ４−７１０５”（東レ・ダウコーニングシリコーン社製）を使用した。
【０１２０】
＜Ｉ−３＞ノボラック型フェノール樹脂として“スミライトレジン”ＰＲ５３１９ ５（住友デュレズ社製）を使用した。
【０１２１】
＜Ｉ−４＞ホスホニトリル化合物
ヘキサクロロシクロトリホスファゼン（環状３量体）とフェノールをトリエチルアミンの存在下、ＴＨＦ中で反応させた。得られた反応液を蒸発・乾固させ、水で洗浄して塩を除去した。収率９５％。このようにして得られたホスホニトリル環状ポリマーをアセトンにより再結晶精製し使用した。なお、数平均重合度ｎに変化はなくｎ＝３であった。
【０１２２】
参考例１１ エチレン共重合体
＜Ｊ−１＞エチレンエチルアクリート共重合体“Ａ−７０９”（三井デュポンポリケミカル社製）を使用した。
【０１２３】
参考例１２ 繊維強化材以外の無機充填剤
＜Ｋ−１＞珪酸塩のタルク“ＬＭＳ３００”（富士タルク社製）を用いた。
【０１２４】
参考例１３ ヒンダードフェノール系酸化防止剤および／またはホスファイト系酸化防止剤
＜Ｌ−１＞ペンタエリスリチル−テトラキス［３−（３，５−ジ−ｔ−ブチル−４−ヒドロキシフェニル）プロピオネート］のヒンダードフェノール系酸化防止剤“ＩＲ−１０１０”（日本チバガイギー社製）
＜Ｌ−２＞ペンタエリスリトール系ホスファイト化合物のホスファイト系酸化防止剤“Ｍａｒｋ ＰＥＰ−３６”（旭電化社製）
実施例１〜１９、比較例１〜１７
スクリュ径３０ｍｍ、Ｌ／Ｄ３５の同方向回転ベント付き２軸押出機（日本製鋼所製、ＴＥＸ−３０α）を用いて、（Ａ）ＰＢＴ、ＰＥＴ、（Ｂ）ビニル系樹脂、（Ｃ）燐酸エステル、（Ｄ）ＭＣ塩、（Ｅ）アルカリ土類金属化合物、（Ｆ）エポキシ化合物、その他の添加剤＜Ｈ−１＞、＜Ｉ−１〜Ｉ−４＞、＜Ｊ−１＞、＜Ｋ−１＞、＜Ｌ−１＞および＜Ｌ−２＞等を表１、表２に示した配合組成で混合し、元込め部から添加した。また、＜Ｇ−１＞のＧＦを配合する例においては、元込め部とベント部の途中にサイドフィダーを設置してＧＦを添加した他は上記と同じ方法で表１、表２に示す添加量の配合物を元込め部から添加した。なお、混練温度２７０℃、スクリュ回転１５０ｒｐｍの押出条件で溶融混合を行い、ストランド状に吐出し、冷却バスを通し、ストランドカッターによりペレット化した。
【０１２５】
得られたペレットを乾燥後、次いで射出成形機により、それぞれの試験片を成形し、次の条件で物性を測定し、表１、表３にその結果を示した。
【０１２６】
（１）難燃性
東芝機械製ＩＳ５５ＥＰＮ射出成形機を用いて、成形温度２７０℃、金型温度８０℃の条件で難燃性評価用試験片の射出成形を行い、ＵＬ９４垂直試験に定められている評価基準に従い、難燃性を評価した。難燃性はＶ−０＞Ｖ−１＞Ｖ−２の順に難燃性が低下しランク付けされる。また、試験片の厚みは１／１６インチ（約１．５９ｍｍ、以下1/16"と略す）厚みと１／３２インチ（約０．７９ｍｍ、以下1/32"と略す）厚みを用い、厚みが薄いほど難燃性は厳しい判定となる。また、燃焼性に劣り上記の難燃性ランクに該当しなかった材料は規格外とした。
【０１２７】
（２）引張強度
東芝機械製ＩＳ５５ＥＰＮ射出成形機を用いて、成形温度２７０℃、金型温度８０℃の条件で３ｍｍ厚みのＡＳＴＭ１号ダンベルの射出成形を行い、ＡＳＴＭＤ６３８に従い引張強を測定した。
【０１２８】
（３）流動性
上記の難燃性と同じく、東芝機械製ＩＳ５５ＥＰＮ射出成形機を用いて、成形温度２７０℃、金型温度８０℃の条件で１／１６インチ（約１．５９ｍｍ）厚み難燃性評価用試験片の射出成形を行い、試験片が充填される最低の成形圧力の成形下限圧力を求めた。
【０１２９】
なお、成形下限圧力が低いほど射出成形時の流動性に優れる材料である。
【０１３０】
（４）色調と色調変化
東芝機械製ＩＳ５５ＥＰＮ射出成形機を用いて、成形温度２７０℃、金型温度８０℃の条件で射出成形された８０ｍｍ×８０ｍｍ×厚み３ｍｍの角板を試料とし、１５０℃に温調されたタバイ社製熱風乾燥機“ＨｉｇｈＴｅｍｐＯｖｅｎ”ＰＶＨ２１０に投入し、１００時間熱処理した。
【０１３１】
上記の乾燥機投入前の角板の色調をスガ試験機社製ＳＭカラーコンピューターを使用して黄色度（ＹＩ）を測定した。なお、ＹＩの値が小さいほど白色に近く、色調に優れる材料である。
【０１３２】
また、上記の乾燥機投入前後の角板の色調変化を上記と同様にスガ試験機社製ＳＭカラーコンピューターを使用してＬ、ａ、ｂのハンター色差を測定した。
【０１３３】
なお、ハンター色差の数値が小さいほど色調変化が少ない材料である。
【０１３４】
（５）ブリードアウト試験
東芝機械製ＩＳ５５ＥＰＮ射出成形機を用いて、成形温度２７０℃、金型温度８０℃の条件で射出成形された８０ｍｍ×８０ｍｍ×厚み３ｍｍの角板を試料とし、１５０℃に温調されたタバイ社製熱風乾燥機“ＨｉｇｈＴｅｍｐＯｖｅｎ”ＰＶＨ２１０に投入し、１００時間熱処理した。
【０１３５】
上記の乾燥機投入前後の角板の外観を目視観察し、次の基準でブリードアウトの有無を判定した。
【０１３６】
ここで、ブリードアウトとは、成形品組成物中の配合物の一部が成形品の表面にしみでてくる現象である。
【０１３７】
○ ：乾燥機投入前後の成形品にブリードアウトが観察されない
△ ：乾燥機投入前の成形品にブリードアウトが観察されない
しかし、乾燥機投入後の成形品にブリードアウトが観察される
× ：乾燥機投入前後の成形品にブリードアウトが観察される
（６）耐加水分解性
東芝機械製ＩＳ５５ＥＰＮ射出成形機を用いて、成形温度２７０℃、金型温度８０℃の条件で３ｍｍ厚みのＡＳＴＭ１号ダンベル片の射出成形を行い、得られたＡＳＴＭ１号ダンベル片を温度１２１℃、湿度１００％ＲＨの条件下で１００時間加水分解処理した後、ＡＳＴＭ Ｄ６４８に準じて引張強度を測定し、測定値 は未処理品の引張強度で割った値の百分率である保持率（％）で示した。
【０１３８】
【表１】

【０１３９】
【表２】

【０１４０】
【表３】

【０１４１】
表１の実施例１〜７と比較例１〜４のＧＦ未添加の評価結果から、実施例１〜７に示す本発明のＰＢＴに、ビニル系樹脂、燐酸エステル、ＭＣ塩、アルカリ土類金属化合物およびエポキシ化合物を配合した組成物は、高度な難燃性を保持しつつ、機械特性と射出成形時の流動性に優れ、成形品表面にブリードアウト物が観察されないことから優れた外観を持つ成形品が得られ、かつ耐加水分解性に優れる信頼性のある成形品が得られていることがわかる。また、上記実施例の中では、ビニル系樹脂としてエポキシ変性ＡＳ樹脂を用いた場合はとくにバランスのとれた性能を示した。また、アルカリ土類金属化合物と単官能のエポキシ化合物を含有するエポキシ化合物を配合した実施例５と実施例７が最も耐加水分解性に優れ、さらには単官能のエポキシ化合物を配合した実施例５が流動性と耐加水分解性のバランスにとくに優れていた。
【０１４２】
一方、比較例１から、ビニル系樹脂を配合しないと乾燥機投入前後の成形品にブリードアウトが観察された。
【０１４３】
また、比較例２〜３から、燐酸エステルまたはＭＣ塩のいずれかが未配合の組成物の場合は、ＰＢＴと同じく難燃性が規格外を示し、難燃性が向上せず、難燃性組成物が得られなかった。
【０１４４】
また、比較例４から、アルカリ土類金属化合物を配合しないと耐加水分解性が劣悪で用途が大きく制限される材料であった。
【０１４５】
また、実施例８〜１０および比較例５〜８から、繊維状強化材のＧＦを配合することによって、引張強度が飛躍的に高くなり、高強度なＰＢＴ樹脂組成物が得られる。
【０１４６】
表１の実施例８〜１０に示す本発明のＰＢＴに、ビニル系樹脂、燐酸エステル、ＭＣ塩、アルカリ土類金属化合物、エポキシ化合物、およびＧＦを配合した組成物は、高度な難燃性を保持しつつ、機械特性と射出成形時の流動性に優れ、成形品表面にブリードアウト物が観察されないことから優れた外観を持つ成形品が得られ、かつ耐加水分解性に優れ、信頼性のある成形品であることがわかる。
【０１４７】
一方、比較例５から、ビニル系樹脂を配合しないＧＦ強化組成物の場合は、乾燥機投入前後の成形品にブリードアウトが観察され、商品価値のない成形品であった。
【０１４８】
また、比較例６〜７から、燐酸エステルまたはＭＣ塩のいずれかが未配合のＧＦ強化組成物の場合は、難燃性が規格外を示し、難燃性の向上が認められなかった。
【０１４９】
また、比較例８のエポキシ化合物は配合するものの、アルカリ土類金属化合物を配合しない材料は、耐加水分解性に大きく劣り、用途が大きく制限される材料であった。また、上記の事実からエポキシ化合物だけでは耐加水分解性が大きく改善されないことが明白である。
【０１５０】
また、表１の実施例１０に示すＭＣ塩を増量した本発明組成物は、難燃性が飛躍的に向上し、1/32”厚みにおいてもＶ−０を示し、他の優れた性能も保持していた。
【０１５１】
表１の比較例７の臭素化ポリカーボネート樹脂と三酸化アンチモンを配合した一般的なハロゲン系難燃剤を用いた1/32”厚みＶ−０の組成物と本発明の実施例１５の1/32”厚みＶ−０の組成物を比較すると、本発明の組成物は機械強度が高く、射出成形時の流動性、および耐加水分解性に優れる材料であることが明白である。
【０１５２】
表２の実施例１１〜１９に示す本発明の組成物は、実施例９の組成物の難燃性、耐加水分解性、耐熱エージング性などを改良する配合物である。
【０１５３】
表３に示す実施例１１〜１４から、ＰＣ樹脂、シリコーン化合物、フェノール樹脂およびホスホニトリル化合物を配合することによって、その他の性能を維持しながら難燃性が向上することがわかる。
【０１５４】
また、実施例１５〜１６のエチレン共重合体あるいはタルクを配合することによって、耐トラッキング性（ＩＥＣ Ｐｕｂｌｉｃａｔｉｏｎ１１２規格に示されている試験方法に従い、成形品の絶縁が破壊される破壊電圧（Ｖ）であり、破壊電圧が大きい程優れる。）が破壊電圧６００Ｖ未満から破壊電圧６００Ｖ以上に向上し、電気特性に優れる成形品が得られた。ただし、エチレン共重合体の場合は難燃性が低下した。
【０１５５】
また、実施例１７〜１９の酸化防止剤を配合した組成物と実施例９のASTM１号ダンベルをタバイ製ギャーオーブン（１８０℃×３００時間処理）に投入して引張強度を測定したとろ、実施例９の組成物より引張強度保持率がいずれも約１５％以上向上した。したがって、酸化防止剤の配合によって、その他の性能を維持しながら耐熱エージング性が向上することがわかる。
【０１５６】
表２と表３に示す比較例１５〜１７は、本発明組成物のビニル系樹脂の代わりに、ビニル系樹脂やＰＢＴ樹脂より難燃性に優れる熱可塑性樹脂として知られているポリフェニレンエーテル樹脂、ポリフェニレンスルフィド樹脂およびナイロン６樹脂をビニル系樹脂と同じく２５重量部を配合した組成物である。
【０１５７】
表３からポリフェニレンエーテル樹脂とポリフェニレンスルフィド樹脂は難燃性が向上したものの、引張強度、流動性、色調、色調変化、および耐加水分解性のいずれにおいても性能に大きく劣る成形品であり、とくに色調と色調変化が大きいため商品価値を大きく損なう材料であった。また、ナイロン６樹脂は難燃性を含むすべての性能において大きく劣る成形品であった。
【０１５８】
【発明の効果】
ＰＢＴに、特定量のビニル系樹脂、燐酸エステル、トリアジン系化合物とシアヌール酸またはイソシアヌール酸との塩、およびアルカリ土類金属化合物さらにはエポキシ化合物、および必要に応じて繊維強化材、フッ素系化合物などを配合することで、高度な難燃性を保持しつつ、特異的に機械特性と射出成形時の流動性に優れると共に、ブリードアウトが生じ難く、かつ耐加水分解性に優れた、信頼性の高い非ハロゲンの難燃性ポリブチレンテレフタレート樹脂組成物および樹脂成形品を得ることでき、自動車部品、電気・電子部品および機械部品の市場拡大に大きく寄与することが期待できる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flame retardant resin composition and a molded article obtained by blending a polybutylene terephthalate resin with a non-halogen flame retardant. More specifically, it has high flame retardancy, mechanical properties, fluidity during injection molding, excellent molded product color tone and hydrolysis resistance, and is suitable for machine mechanism parts, electrical and electronic parts or automotive parts. The present invention relates to a flame retardant polybutylene terephthalate resin composition and a molded article using a flame retardant.
[0002]
[Prior art]
Polybutylene terephthalate resin (PBT) is used in a wide range of fields such as mechanical mechanism parts, electrical / electronic parts, and automobile parts, taking advantage of its excellent properties such as injection moldability and mechanical properties.
[0003]
Further, by combining a fiber reinforcement with PBT, it is widely used as a material that is further excellent in mechanical properties and heat resistance. Among the fiber reinforcements, many glass fibers are used in particular.
[0004]
Because PBT is inherently flammable, it is safe against flames in addition to the balance of general chemical and physical properties for use as industrial materials such as mechanical mechanism parts, electrical / electronic parts, and automobile parts. In other words, a high degree of flame retardancy, which indicates V-0 of the UL-94 standard, is often required.
[0005]
In addition, there is a demand for molded articles that can have various color tones with high flame retardancy and pigments and dyes.
[0006]
As a method for imparting flame retardancy to PBT, a method in which a halogen-based organic compound as a flame retardant and an antimony compound as a flame retardant aid are compounded into a resin is common. However, this method has a tendency to generate a large amount of smoke during combustion.
[0007]
In addition, due to increased environmental awareness, there is a concern about the environmental impact of halogen-based flame retardant materials.
[0008]
Therefore, in recent years, it has been strongly desired to use a flame retardant containing no halogen.
[0009]
Until now, as a method for flame-retarding a thermoplastic resin without using a halogen-based flame retardant, adding a hydrated metal compound such as aluminum hydroxide or magnesium hydroxide is widely known. In order to obtain flame retardancy, it is necessary to add a large amount of the hydrated metal compound, which has the disadvantage of losing the original properties of the resin.
[0010]
On the other hand, as a method for making a thermoplastic resin flame retardant without using such a hydrated metal compound, Japanese Patent Application Laid-Open No. 51-150553, Japanese Patent Application Laid-Open No. 58-108248, Disclosure in Japanese Utility Model Laid-Open Nos. 59-81351, 5-78560, 5-287119, 5-295164, 5-320486, and 5-339417 Has been.
[0011]
However, although it is a useful flame-retardant resin material that does not use a halogen-based flame retardant, there is a problem that the use is limited because there is unique coloring and the color tone of the product is limited.
[0012]
JP-A-3-281652, JP-A-5-70671, JP-A-7-233311 and JP-A-8-73713 disclose that an aromatic phosphate ester and melamine cyanurate are blended. Has been.
[0013]
However, although it is a useful flame-retardant resin material that does not use a halogen-based flame retardant, the bleed-out of the aromatic phosphoric acid ester on the surface of the molded product causes a significant loss in product value and inferior hydrolysis resistance Had a point.
[0014]
JP-A-10-147699, JP-A-10-182955, JP-A-10-18295, and JP-A-2000-26710 contain a composition containing PBT, polyphenylene ether, phosphate ester, and the like. On the other hand, blending a styrene resin is disclosed.
[0015]
However, although it is a useful flame-retardant resin material that does not use halogen-based flame retardants, blending with polyphenylene ether reduces mechanical strength, fluidity during injection molding, and the molded product is colored yellow and hydrolysis resistant. Inferior in properties, the use is limited.
[0016]
Japanese Patent Application Laid-Open No. 2000-212412 discloses that a polyester resin, an organic phosphorus flame retardant, glass fiber, and a vinyl resin are blended.
[0017]
However, although it is a useful flame-retardant resin material that does not use a halogen-based flame retardant, it is very inferior in hydrolysis resistance and has an extremely low flame-retardant effect, and it is difficult to add melamine cyanurate together. Although the flammability is improved, the problem of hydrolysis resistance is not improved, so that the product value and application are limited.
[0018]
[Problems to be solved by the invention]
In other words, the present invention blends a polybutylene terephthalate resin with a non-halogen flame retardant, and is excellent in flame retardancy and mechanical properties, fluidity during injection molding, and color tone of molded products, and also excellent in molding with no bleed out. It is an object of the present invention to obtain a flame-retardant polybutylene terephthalate resin composition and a molded product that maintain the product appearance and are excellent in hydrolysis resistance.
[0019]
[Means for Solving the Problems]
As a result of intensive studies in view of the above situation, the present inventors have found that polybutylene terephthalate resin (or polybutylene terephthalate resin and polyethylene terephthalate resin) has a specific amount of vinyl resin, aromatic phosphate ester, and triazine compound. Incorporating a salt of cyanuric acid or isocyanuric acid with an alkaline earth metal compound, while maintaining high flame retardancy, specifically mechanical properties and fluidity during injection molding, and molded products The present inventors have found that a flame-retardant polybutylene terephthalate resin composition and a molded product having excellent color tone, hardly causing bleed out and maintaining an excellent molded product appearance and excellent in hydrolysis resistance can be obtained. .
[0020]
In the present invention, the decrease in hydrolysis resistance, which has been regarded as a disadvantage of the phosphate ester flame retardant system, has been remarkably improved, and a practical level of hydrolysis resistance has been successfully achieved.
[0021]
  That is, the present invention is based on (A) 100 parts by weight of polybutylene terephthalate resin or 100 parts by weight of polybutylene terephthalate resin and polyethylene terephthalate resin. 1 to 100 parts by weight, (D) 1 to 150 parts by weight of a salt of triazine compound and cyanuric acid or isocyanuric acid, and (E) 0.1 to 10 parts by weight of an alkaline earth metal compound A combustible polybutylene terephthalate resin composition, wherein (B) vinyl resin isA copolymer obtained by copolymerizing acrylonitrile, styrene and glycidyl methacrylate, which is 50 to 99% by weight of styrene and 50 to 1% by weight of acrylonitrile with respect to the total of styrene and acrylonitrile, and glycidyl with respect to the copolymer 0.1 to 5% by weight of methacrylateA flame retardant polybutylene terephthalate resin composition,
and
The present invention provides a molded article used for a mechanical mechanism part, an electric / electronic part or an automobile part, comprising the flame retardant polybutylene terephthalate resin composition.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
The flame-retardant polybutylene terephthalate resin composition and molded article of the present invention will be specifically described below.
[0023]
The (A) polybutylene terephthalate resin in the present invention is a polymer obtained by a polycondensation reaction between terephthalic acid or an ester-forming derivative thereof and 1,4-butanediol or an ester-forming derivative thereof. As an acid component, isophthalic acid, naphthalene dicarboxylic acid, adipic acid, sebacic acid, dodecanedioic acid, oxalic acid and the like are used as glycol components. Ethylene glycol, propylene glycol, neopentyl glycol, 1,5-pentanediol, 1,6 -Hexanediol, decamethylene glycol, cyclohexanedimethanol, cyclohexanediol, etc., or a long chain glycol having a molecular weight of 400 to 6000, that is, polyethylene glycol, poly-1,3-propylene glycol, polytetramethyl Such as glycol to may be copolymerized than 20 mol%. Preferred examples of these polymers or copolymers include polybutylene terephthalate, polybutylene (terephthalate / isophthalate), polybutylene (terephthalate / adipate), polybutylene (terephthalate / sebacate), polybutylene (terephthalate / decanedicarboxylate), polybutylene. (Terephthalate / Naphthalate) and the like may be used, and these may be used alone or in combination of two or more. Here, “/” means copolymerization.
[0024]
A polymer or copolymer having an intrinsic viscosity measured at 25 ° C. using an o-chlorophenol solvent is in the range of 0.36 to 1.60, particularly 0.42 to 1.25. It is suitable from the viewpoint of impact strength and moldability of the composition. Moreover, (A) polybutylene terephthalate resin may use together polybutylene terephthalate resin from which intrinsic viscosity differs. As the polybutylene terephthalate having a different intrinsic viscosity, it is preferable to use a polybutylene terephthalate resin having an intrinsic viscosity in the range of 0.36 to 1.60.
[0025]
Further, those polybutylene terephthalate resins and those having a COOH end group amount determined by potentiometric titration of an m-cresol solution with an alkaline solution in the range of 1 to 50 eq / t (end group amount per ton of polymer) are durable. From the point of anisotropy suppressing effect, it can be preferably used. Furthermore, those having particularly few COOH end groups can be preferably used since they are excellent in hydrolysis resistance.
[0026]
In the present invention, instead of (A) polybutylene terephthalate resin, polybutylene terephthalate resin and polyethylene terephthalate resin can be used in combination. The polyethylene terephthalate resin refers to a polymer obtained by polycondensation using terephthalic acid as an acid component and ethylene glycol as a glycol component. In addition to this, as an acid component, isophthalic acid, adipic acid, oxalic acid, etc. As propylene glycol, 1,4-butanediol, neopentyl glycol, 1,5-pentanediol, 1,6-hexanediol, decamethylene glycol, cyclohexanedimethanol, cyclohexanediol, or a long chain having a molecular weight of 400 to 6000 Glycols, that is, polyethylene glycol, poly-1,3-propylene glycol, polytetramethylene glycol, and the like can be copolymerized in an amount of 20 mol% or less. In addition, the polyethylene terephthalate resin has a composition having an intrinsic viscosity measured at 25 ° C. using an o-chlorophenol solvent of 0.36 to 1.60, particularly 0.45 to 1.15. It is suitable from the point of impact strength and moldability.
[0027]
Moreover, the use ratio of the polybutylene terephthalate resin and the polyethylene terephthalate resin is 1 to 99% by weight of the polybutylene terephthalate resin and polyethylene based on the total of the polybutylene terephthalate resin and the polyethylene terephthalate resin from the viewpoint of flame retardancy and crystallinity. The terephthalate is preferably 99 to 1% by weight, more preferably 10 to 95% by weight of the polybutylene terephthalate resin and 5 to 90% by weight of the polyethylene terephthalate resin.
[0028]
(A) Polybutylene terephthalate and a mixture of polybutylene terephthalate resin and polyethylene terephthalate resin, such as polyester elastomer, polyarylate resin, wholly aromatic liquid crystal polyester, semi-aromatic liquid crystal polyester, and polycyclohexanedimethylene terephthalate resin One or more polyester resins may be blended, and the blending amount is an amount within a range in which the effect of the present invention is not significantly reduced.
[0029]
The vinyl resin (B) in the present invention is not limited, but one or more selected from aromatic vinyl compounds, vinyl cyanide compounds, (meth) acrylic acid alkyl esters, and maleimide monomers. Resin obtained by polymerizing these monomers, or those obtained by graft polymerization of these monomers to rubber-based components such as polybutadiene rubber, or those obtained by copolymerization (hereinafter referred to as “(co)). And may be collectively referred to as "polymer"). Examples of the aromatic vinyl compound include styrene, α-methylstyrene, vinyltoluene, and divinylbenzene. Examples of the vinyl cyanide compound include acrylonitrile and methacrylonitrile. As the (meth) acrylic acid alkyl ester, Examples include (meth) acrylic acid alkyl esters such as methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, methyl acrylate, ethyl acrylate, n-butyl acrylate, and stearyl acrylate. Examples of the body include N-substituted maleimides such as maleimide, N-methylmaleimide, N-ethylmaleimide, N-phenylmaleimide, N-cyclohexylmaleimide, and derivatives thereof. Moreover, vinyl resin with the following component which can be copolymerized with said vinyl resin is also contained in this invention. Specific examples of components capable of such copolymerization include diene compounds, maleic acid dialkyl esters, allyl alkyl ethers, unsaturated amino compounds, and vinyl alkyl ethers.
[0030]
Examples of preferred (co) polymers of (B) vinyl resins include polymethyl methacrylate, methyl methacrylate / acrylonitrile, polystyrene resin, acrylonitrile / styrene resin (AS resin), styrene / butadiene resin, styrene / N- Vinyl maleimide resin, vinyl (co) polymers such as styrene / acrylonitrile / N-phenylmaleimide resin, acrylonitrile / butadiene (may contain acrylonitrile component or styrene component) / styrene resin (ABS resin), acrylonitrile / Styrene resin modified with a rubbery polymer such as butadiene / methyl methacrylate / styrene resin (MABS resin), high impact polystyrene resin, and styrene / butadiene / styrene resin as a block copolymer For example, styrene / ethylene / butadiene / styrene resin, polystyrene resin and acrylonitrile / styrene resin are preferable, and acrylonitrile is a copolymer obtained by copolymerizing acrylonitrile and styrene. / Styrene resin is more preferable (/ indicates copolymerization). The copolymerization amount of styrene and acrylonitrile in the acrylonitrile / styrene resin is not particularly limited, but is preferably 50 to 99% by weight of styrene and 50 to 1% by weight of acrylonitrile with respect to the total of both.
[0031]
As the vinyl resin, the above (co) polymer was further graft-polymerized or copolymerized with unsaturated monocarboxylic acids, unsaturated dicarboxylic acids, unsaturated acid anhydrides, or epoxy group-containing vinyl monomers. A vinyl copolymer may be used. Among these, a vinyl copolymer obtained by graft polymerization or copolymerization of an unsaturated acid anhydride or an epoxy group-containing vinyl monomer is preferable.
[0032]
Such epoxy group-containing vinyl monomers are compounds that share both radically polymerizable vinyl groups and epoxy groups in one molecule. Specific examples thereof include glycidyl acrylate, glycidyl methacrylate, glycidyl ethacrylate, and itacon. Examples thereof include glycidyl esters of unsaturated organic acids such as glycidyl acid, glycidyl ethers such as allyl glycidyl ether, and the above derivatives such as 2-methylglycidyl methacrylate, among which glycidyl acrylate and glycidyl methacrylate can be preferably used. . Moreover, these can be used individually or in combination of 2 or more types.
[0033]
Unsaturated acid anhydrides are compounds that share both radically polymerizable vinyl groups and acid anhydrides in one molecule, and preferred examples include maleic anhydride.
[0034]
As a method for producing a vinyl copolymer obtained by graft polymerization or copolymerization of the unsaturated monocarboxylic acid, unsaturated dicarboxylic acid, unsaturated acid anhydride or epoxy group-containing vinyl monomer, a generally known method is used. In particular, an aromatic vinyl monomer (preferably styrene), or an aromatic vinyl monomer (preferably styrene) and other monomers copolymerizable therewith, and unsaturated monocarboxylic acids, Method of copolymerizing unsaturated dicarboxylic acid, unsaturated acid anhydride or epoxy group-containing vinyl monomer, (co) polymer to unsaturated monocarboxylic acid, unsaturated dicarboxylic acid, unsaturated acid anhydride Or the method of graft-polymerizing an epoxy group containing vinyl-type monomer is mentioned. Such copolymerization and graft polymerization can also be performed by known methods.
[0035]
The amount used for graft polymerization or copolymerization of unsaturated monocarboxylic acids, unsaturated dicarboxylic acids, unsaturated acid anhydrides or epoxy group-containing vinyl monomers depends on the compatibility of component (A) with the vinyl resin. Although it will not specifically limit if it is effective in improving, It is preferable that it is 0.05 weight% or more with respect to vinyl resin. Copolymerization in a large amount tends to decrease fluidity and gelation, and is preferably 20% by weight or less, more preferably 10% by weight or less, and further preferably 5% by weight or less.
[0036]
Moreover, the above-mentioned (co) polymer may be a vinyl (co) polymer that is epoxy-modified with an epoxidizing agent such as peroxides, performic acid, peracetic acid, and perbenzoic acid.
[0037]
The amount of epoxy group introduced into the vinyl resin in the epoxy group introducing method using an epoxidizing agent is not particularly limited as long as it is effective to improve the compatibility between the component (A) and the vinyl resin. However, the epoxy equivalent is preferably 100 g / equivalent to 10,000 g / equivalent, more preferably 200 to 5000 g / equivalent, and still more preferably 250 to 3000 g / equivalent. The epoxy equivalent of these resins can be measured by the method described in JP-A-6-256417.
[0038]
The vinyl resin used in the present invention includes a vinyl resin obtained by graft polymerization or copolymerization of an epoxy group-containing vinyl monomer, and a styrene / butadiene / styrene resin or a styrene / isoprene / styrene resin epoxy-modified with an epoxidizing agent. A block copolymer such as styrene / ethylene / butadiene / styrene resin is preferably used because of its good compatibility with the component (A). Furthermore, a vinyl resin obtained by graft polymerization or copolymerization of glycidyl methacrylate is more preferably used. Of these, a copolymer obtained by copolymerizing glycidyl methacrylate is preferable, and a copolymer obtained by copolymerizing styrene, acrylonitrile and glycidyl methacrylate is particularly preferable. A preferable copolymerization amount of glycidyl methacrylate in the copolymer obtained by copolymerizing styrene, acrylonitrile and glycidyl methacrylate is preferably an amount effective for improving the compatibility with the component (A). It is preferably 1% by weight or more. When copolymerized in a large amount, there is a problem of decrease in fluidity and gelation, and it is preferably 20% by weight or less, more preferably 10% by weight or less, and further preferably 5% by weight or less. The copolymerization amount of styrene and acrylonitrile is not particularly limited, but is preferably 50 to 99% by weight of styrene and 50 to 1% by weight of acrylonitrile with respect to the total of styrene and acrylonitrile.
[0039]
Moreover, the addition amount of vinyl-type resin is 1-100 weight part with respect to 100 weight part of (A) component from the point of the molded article external appearance and flame retardance of the flame-retardant resin composition obtained, Preferably it is 2 ~ 90 parts by weight.
[0040]
Although it does not limit as (C) phosphate ester in this invention, What is generally marketed and the synthesized phosphate ester can be used. Specific examples include tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, triphenyl phosphate, tris-isopropylbiphenyl phosphate, trimethyl phosphate, triethyl phosphate, tributyl phosphate, trioctyl phosphate, tributoxyethyl phosphate, octyl diphenyl Phosphate, orthophenylphenol phosphates, pentaerythritol phosphates, neopetyl glycol phosphates, substituted neopetyl glycol phosphonates, nitrogen-containing phosphates, and aromatic phosphates of the following formula (1) In particular, aromatic phosphates of the following formula (1) are preferably used.
[0041]
[Chemical formula 5]

[0042]
(In the above formula, Ar¹, Ar², Ar^Three, Ar^FourRepresent the same or different aromatic groups containing no halogen. X represents a structure selected from the following formulas (2) to (4), and in the formulas (2) to (4), R¹~ R⁸Represent the same or different hydrogen atoms or alkyl groups having 1 to 5 carbon atoms, Y represents a direct bond, O, S, SO₂, C (CH_Three)₂, CH₂, CHPh, and Ph represents a phenyl group. Moreover, n of (1) Formula is an integer greater than or equal to 0. In the formula (1), k and m are each an integer of 0 or more and 2 or less, and (k + m) is an integer of 0 or more and 2 or less. Note that the aromatic phosphate ester may be a mixture of aromatic phosphate esters having different n or different structures.
[0043]
[Chemical 6]

[0044]
[Chemical 7]

[0045]
[Chemical 8]

[0046]
In the formula of the formula (1), n is an integer of 0 or more, and the upper limit is preferably 40 or less from the viewpoint of flame retardancy. Preferably it is 0-10, Most preferably, it is 0-5.
[0047]
K and m are each an integer of 0 or more and 2 or less, and k + m is an integer of 0 or more and 2 or less, preferably k or m is an integer of 0 or more and 1 or less, particularly preferably k or m. Is 1 respectively.
[0048]
In the formulas (2) to (4), R¹~ R⁸Represent the same or different hydrogen or an alkyl group having 1 to 5 carbon atoms. Specific examples of the alkyl group having 1 to 5 carbon atoms include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, tert-butyl group, n-isopropyl and neopentyl. Tert-pentyl group, 2-isopropyl, neopentyl, tert-pentyl group, 3-isopropyl, neopentyl, tert-pentyl group, neoisopropyl, neopentyl, tert-pentyl group, etc., but hydrogen, methyl group, ethyl group are Hydrogen is particularly preferable.
[0049]
Ar¹, Ar², Ar^Three, Ar^FourRepresent the same or different aromatic groups containing no halogen. Examples of the aromatic group include aromatic groups having a benzene skeleton, a naphthalene skeleton, an indene skeleton, and an anthracene skeleton, and among them, those having a benzene skeleton or a naphthalene skeleton are preferable. These may be substituted with a halogen-free organic residue (preferably an organic residue having 1 to 8 carbon atoms), and the number of substituents is not particularly limited, but may be 1 to 3. preferable. Specific examples include phenyl groups, tolyl groups, xylyl groups, cumenyl groups, mesityl groups, naphthyl groups, indenyl groups, anthryl groups and the like, but phenyl groups, tolyl groups, xylyl groups, cumenyl groups, A naphthyl group is preferable, and a phenyl group, a tolyl group, and a xylyl group are particularly preferable.
[0050]
Of these, the following compounds (5) and (6) are preferable, and the compound (5) is particularly preferable.
[0051]
[Chemical 9]

[0052]
[Chemical Formula 10]

[0053]
As commercially available phosphoric acid esters, one or more selected from Daihachi Chemical Co., Ltd. PX-200, PX-201, PX-130, CR-733S, TPP, CR-741, CR747, TCP, TXP, CDP Preferably, one or more selected from PX-200, TPP, CR-733S, CR-741, CR747, particularly preferably PX-200, CR-733S, CR-741 are used. Among them, PX-200 is particularly preferable.
[0054]
Moreover, the addition amount of (C) phosphate ester is 1-100 weight part with respect to 100 weight part of (A) component from the point of a flame retardance and a mechanical characteristic, Preferably it is 2-90 weight part, More preferably, it is 3 ~ 80 parts by weight.
[0055]
As the salt of (D) triazine-based compound and cyanuric acid or isocyanuric acid in the present invention, cyanuric acid or an adduct of isocyanuric acid and triazine-based compound is preferable, usually 1 to 1 (molar ratio). An adduct having a composition of 1 to 2 (molar ratio). Of the triazine compounds, those that do not form a salt with cyanuric acid or isocyanuric acid are excluded. Among the salts of (D) triazine compounds with cyanuric acid or isocyanuric acid, melamine, benzoguanamine, acetoguanamine, 2-amido-4,6-diamino-1,3,5-triazine, mono (hydroxy) Methyl) melamine, di (hydroxymethyl) melamine, and tri (hydroxymethyl) melamine salts are preferred, and melamine, benzoguanamine, and acetoguanamine salts are preferred, and are prepared by known methods. For example, triazine compounds and cyanurates An acid or isocyanuric acid mixture is made into a water slurry and mixed well to form both salts in the form of fine particles, and the slurry is generally filtered and dried. The salt does not need to be completely pure, and some unreacted triazine compound, cyanuric acid or isocyanuric acid may remain. Moreover, the average particle diameter of the salt before blending with the resin is preferably 100 to 0.01 μm, more preferably in terms of flame retardancy, mechanical strength, heat and humidity resistance, retention stability, and surface properties of the molded product. Is 80-1 μm. In addition, when the dispersibility of the salt is poor, a dispersant such as tris (β-hydroxyethyl) isocyanurate, a known surface treatment agent, or the like may be used in combination.
[0056]
In addition, the blending amount of the (D) triazine compound and the salt of cyanuric acid or isocyanuric acid is 1 to 150 parts by weight, preferably 100 parts by weight of component (A) from the viewpoint of flame retardancy and mechanical properties, It is 2-140 weight part, More preferably, it is 3-130 weight part.
[0057]
Preferred examples of the alkaline earth metal in the (E) alkaline earth metal compound used in the present invention include magnesium, calcium, and barium. In addition, as alkaline earth metal compounds, these alkaline earth metal hydroxides, oxides, carbonates, sulfates, acetates, phosphates and other inorganic acid salts, acetates, lactates, oleic acids, Organic acid salts such as palmitic acid, stearic acid and montanic acid are preferred. Specific examples include magnesium hydroxide, calcium hydroxide, barium hydroxide, magnesium oxide, calcium oxide, barium oxide, magnesium carbonate, calcium carbonate, barium carbonate, magnesium sulfate, calcium sulfate, barium sulfate, magnesium phosphate, calcium phosphate, phosphorus Barium acid, magnesium acetate, calcium acetate, barium acetate, magnesium lactate, calcium lactate, barium lactate, and magnesium, calcium and barium salts of organic acids such as oleic acid, palmitic acid, stearic acid and montanic acid Magnesium hydroxide and calcium carbonate are preferably used, and calcium carbonate is more preferably used. Such alkaline earth metals can be used alone or in combination of two or more. In addition, calcium carbonate, light calcium carbonate, heavy calcium carbonate, wet-pulverized fine powder heavy calcium carbonate, wet heavy calcium carbonate (chalk), etc. are known depending on the production method. Included in the invention. The calcium carbonate and alkaline earth metal salt may be treated with one or more surface treatment agents such as a silane coupling agent, an organic substance, and an inorganic substance, and the shape thereof is powder, plate, or fiber. However, it is preferable from the viewpoint of dispersibility to use it in a powder form of 10 μm or less.
[0058]
(E) By adding an alkaline earth metal compound, the hydrolysis characteristics can be remarkably improved. Phosphoric ester compounds that are effective as non-halogen flame retardants have the disadvantage of poor hydrolysis resistance because the phosphoric ester bonds are easily hydrolyzed. In the present invention, it is presumed that the hydrolysis resistance is greatly improved by the synergistic action of the bleed-out prevention by the vinyl resin and the acid trap by the alkaline earth metal compound.
[0059]
Moreover, the compounding quantity of (E) alkaline-earth metal compound is 0.1-10 weight part with respect to 100 weight part of (A) component from the point of mechanical characteristics and hydrolysis resistance, Preferably it is 0.2-9. Part by weight, more preferably 0.3 to 8 parts by weight.
[0060]
In the present invention, (F) an epoxy compound can be further blended. Examples of such epoxy compounds include glycidyl ester compounds, glycidyl ether compounds, and glycidyl ester ether compounds, which can be used singly or in combination.
[0061]
  Moreover, in order to express the improvement effect excellent in the hydrolysis resistance of PBT, an epoxy compound having an epoxy equivalent of less than 500 is preferable, and an epoxy compound having an epoxy equivalent of less than 400 is particularly preferable. Here, the epoxy equivalent is a gram of an epoxy compound containing 1 gram equivalent of an epoxy group.In numberYes, the epoxy equivalent is obtained by dissolving the epoxy compound in pyridine, adding 0.05N hydrochloric acid and heating at 45 ° C, then using a mixture of thymol blue and cresol red as the indicator and back titrating with 0.05N caustic soda. Can be sought.
[0062]
In addition, as the above-mentioned epoxy compound, an epoxy compound in which a monofunctional glycidyl ester compound and a glycidyl ether compound are used in combination or a monofunctional glycidyl ester compound is preferably used, and in particular, viscosity stability and hydrolysis resistance of the resulting composition are used. From the balance of property, a monofunctional glycidyl ester compound is more preferable.
[0063]
Further, the glycidyl ester compound is not limited, but as specific examples, glycidyl benzoate, tBu-glycidyl benzoate, P-toluic acid glycidyl ester, cyclohexanecarboxylic acid glycidyl ester, pelargonic acid glycidyl Esters, glycidyl stearate, glycidyl laurate, glycidyl palmitate, glycidyl behenate, glycidyl behenate, glycidyl versatate, glycidyl oleate, glycidyl linoleate, glycidyl linolein, glycidyl behenol, stearolic acid Glycidyl ester, terephthalic acid diglycidyl ester, isophthalic acid diglycidyl ester, phthalic acid diglycidyl ester , Naphthalenedicarboxylic acid diglycidyl ester, bibenzoic acid diglycidyl ester, methyl terephthalic acid diglycidyl ester, hexahydrophthalic acid diglycidyl ester, tetrahydrophthalic acid diglycidyl ester, cyclohexanedicarboxylic acid diglycidyl ester, adipic acid diglycidyl ester , Succinic acid diglycidyl ester, sebacic acid diglycidyl ester, dodecanedioic acid diglycidyl ester, octadecanedicarboxylic acid diglycidyl ester, trimellitic acid triglycidyl ester, pyromellitic acid tetraglycidyl ester, and the like. Two or more kinds can be used.
[0064]
Further, the glycidyl ether compound is not limited, but specific examples include phenyl glycidyl ether, O-phenylphenyl glycidyl ether, 1,4-bis (β, γ-epoxypropoxy). ) Butane, 1,6-bis (β, γ-epoxypropoxy) hexane, 1,4-bis (β, γ-epoxypropoxy) benzene, 1- (β, γ-epoxypropoxy) -2-ethoxyethane, 1 Others such as-(β, γ-epoxypropoxy) -2-benzyloxyethane, 2,2-bis- [р- (β, γ-epoxypropoxy) phenyl] propane and bis- (4-hydroxyphenyl) methane Examples include diglycidyl ether obtained by the reaction of bisphenol and epichlorohydrin. These can be used alone or in combination of two or more. .
[0065]
Further, the blending amount of the (F) epoxy compound is preferably 0.05 to 10 parts by weight, particularly preferably 0.1 to 9 parts by weight with respect to 100 parts by weight of the component (A) from the viewpoint of mechanical properties and hydrolysis resistance. Part.
[0066]
In general, it is known that the terminal carboxyl group of a polybutylene terephthalate resin is blocked by using an epoxy compound and the hydrolysis resistance of the polybutylene terephthalate resin is improved. When the earth metal compound and the present epoxy compound are used in combination, the hydrolysis resistance is synergistically improved, and it is possible to impart a high degree of hydrolysis resistance that cannot be achieved by simply adding an epoxy compound.
[0067]
In the present invention, a high-strength resin can be obtained by further blending a fiber reinforcement, and examples of the fiber reinforcement include glass fibers, aramid fibers, and carbon fibers. The above glass fiber is a chopped strand type or roving type glass fiber used for a normal PBT reinforcement, and is a silane coupling agent such as an aminosilane compound or an epoxysilane compound and / or urethane, vinyl acetate, bisphenol A. Glass fibers treated with a sizing agent containing one or more epoxy compounds such as diglycidyl ether and novolac epoxy compounds are preferably used. The silane coupling agent and / or sizing agent may be used as an emulsion.
[0068]
In addition, the amount of the fiber reinforcing material is preferably 1 to 250 parts by weight, particularly preferably 2 to 230 parts by weight with respect to 100 parts by weight of component (A) from the viewpoint of flame retardancy and fluidity during molding. It is.
[0069]
Further, in the present invention, an inorganic filler can be further blended, and the crystallization characteristics, arc resistance, anisotropy, mechanical strength, flame retardancy or heat distortion temperature of the composition of the present invention are improved. Such inorganic fillers include, but are not limited to, needle-like, granular, powdery and layered inorganic fillers, specific examples include glass beads, milled fibers, glass flakes, Examples include potassium titanate, wollastonite, silica, kaolinite, talc, smectite clay minerals (montmorillonite, hectorite), vermiculite, mica, fluorine teniolite, zirconium phosphate, titanium phosphate, and dolomite. It is done. The inorganic filler may be subjected to a surface treatment such as a coupling agent treatment, an epoxy compound, or an ionization treatment. The average particle size of the granular, powdery and layered inorganic fillers is preferably 0.1 to 20 μm, particularly preferably 0.2 to 10 μm from the viewpoint of impact strength. Moreover, the compounding quantity of an inorganic filler has the preferable quantity which does not exceed the compounding quantity of a fiber reinforcement.
[0070]
In this invention, by mix | blending a fluorine resin further, it can suppress that the flame-retardant resin composition at the time of combustion melts and falls, and can further improve a flame retardance. The above-mentioned fluororesin is a resin containing fluorine in a substance molecule. Specifically, polytetrafluoroethylene, polyhexafluoropropylene, (tetrafluoroethylene / hexafluoropropylene) copolymer, (tetra (Fluoroethylene / perfluoroalkyl vinyl ether) copolymer, (tetrafluoroethylene / ethylene) copolymer, (hexafluoropropylene / propylene) copolymer, polyvinylidene fluoride, (vinylidene fluoride / ethylene) copolymer, etc. Among them, polytetrafluoroethylene, (tetrafluoroethylene / perfluoroalkyl vinyl ether) copolymer, (tetrafluoroethylene / hexafluoropropylene) copolymer, (tetrafluoroethylene / ethylene) copolymer , Polyvinylidene fluoride are preferable, polytetrafluoroethylene, (tetrafluoroethylene / ethylene) copolymer are preferable. Moreover, the compounding quantity of fluororesin is 0.02-20 weight part with respect to 100 weight part of (A) component from the point of a flame retardance and a mechanical characteristic, Preferably it is 0.1-18 weight part, More preferably Is 0.2 to 16 parts by weight.
[0071]
In this invention, a flame retardance can be improved further by mix | blending polycarbonate resin further. As said polycarbonate resin, the aromatic homo or copolycarbonate obtained by making an aromatic dihydric phenol type compound, phosgene, or carbonic acid diester react is mentioned. The aromatic homo or copolycarbonate resin usually has a viscosity average molecular weight in the range of 10,000 to 1,000,000. If the viscosity average molecular weight is in the range of 10,000 to 1,000,000, polycarbonate resins having different viscosity average molecular weights are used in combination. Also good. Here, as the dihydric phenol compound, 2,2-bis (4-hydroxyphenyl) propane, 2,2-bis (4-hydroxy-3,5-dimethylphenyl) propane, bis (4-hydroxyphenyl) methane 1,1-bis (4-hydroxyphenyl) ethane, 2,2-bis (4-hydroxyphenyl) butane, 2,2-bis (4-hydroxy-3,5-diphenyl) butane, 2,2-bis (4-hydroxy-3,5-diethylphenyl) propane, 2,2-bis (4-hydroxy-3,5-diethylphenyl) propane, 1,1-bis (4-hydroxyphenyl) cyclohexane, 1-phenyl- 1,1-bis (4-hydroxyphenyl) ethane or the like can be used, and these can be used alone or as a mixture. Moreover, the compounding quantity of polycarbonate resin is 1-100 weight part with respect to 100 weight part of (A) component from the point of a flame retardance and a mechanical characteristic, Most preferably, it is 2-90 weight part.
[0072]
In the present invention, a flame retardant aid that helps flame retardancy such as a silicone compound, a phenol resin, a phosphonitrile compound, ammonium polyphosphate, and melamine phosphate can be blended and used in one or more kinds. Moreover, the blending amount of the flame retardant aid is preferably 1 to 100 parts by weight, particularly preferably 2 to 90 parts by weight with respect to 100 parts by weight of component (A) from the viewpoint of flame retardancy and mechanical properties. is there.
[0073]
Examples of the silicone compound include silicone resin, silicone oil, and silicone powder.
[0074]
Examples of the silicone resin include polyorganosiloxanes in which a group selected from a saturated or unsaturated monovalent hydrocarbon group, a hydrogen atom, a hydroxyl group, an alkoxyl group, an aryl group, a vinyl group, or an allyl group is chemically bonded to a siloxane. And those having a viscosity of about 200 to 300,000,000 centipoise at room temperature are preferable. However, as long as the above silicone resin is used, the present invention is not limited thereto, and the product shape may be oil, powder or gum. In addition, an epoxy group, a metacle group and an amino group may be introduced as a functional group, or a mixture with two or more kinds of silicone resins may be used.
[0075]
Silicone oil includes polyorganosiloxane in which a group selected from saturated or unsaturated monovalent hydrocarbon group, hydrogen atom, hydroxyl group, alkoxyl group, aryl group, vinyl or allyl group is chemically bonded to siloxane. And those having a viscosity of about 0.65 to 100000 centistokes at room temperature are preferable, but the silicone oil resin is not limited thereto, and the product shape is oily, powdery and gumy. An epoxy group, a metacle group and an amino group may be introduced as a functional group, or a mixture of two or more kinds of silicone oils or silicone resins may be used.
[0076]
Examples of the silicone powder include those obtained by blending an inorganic filler with the above silicone resin and / or silicone oil, and silica or the like is preferably used as the inorganic filler.
[0077]
The above-mentioned phenol resin is arbitrary as long as it is a polymer having a plurality of phenolic hydroxyl groups, and examples thereof include novolak type, resol type and thermal reaction type resins, and resins obtained by modifying these. These may be an uncured resin, a semi-cured resin, or a cured resin to which no curing agent is added. Among these, a novolak type phenol resin which is not added with a curing agent and is non-thermally reactive is preferable in terms of flame retardancy, mechanical properties and economy.
[0078]
Further, the shape is not particularly limited, and any of pulverized products, granules, flakes, powders, needles, liquids, and the like can be used, and one or more can be used as necessary. The phenolic resin is not particularly limited, and commercially available ones are used. For example, in the case of a novolak type phenol resin, the reaction vessel is charged with a molar ratio of phenols to aldehydes of 1: 0.7 to 1: 0.9, and further oxalic acid, hydrochloric acid, sulfuric acid, toluenesulfone. After adding a catalyst such as an acid, the mixture is heated and refluxed for a predetermined time. In order to remove the produced water, it can be obtained by a method of vacuum dehydration or standing dehydration and further removing remaining water and unreacted phenols. These resins or co-condensed phenol resins obtained by using a plurality of raw material components can be used alone or in combination of two or more.
[0079]
In the case of a resol type phenol resin, the molar ratio of phenols to aldehydes is charged into the reaction vessel at a ratio of 1: 1 to 1: 2, and sodium hydroxide, aqueous ammonia, other basic substances, etc. After adding the catalyst, it can be obtained by the same reaction and treatment as the novolak type phenol resin.
[0080]
Here, as phenols, phenol, o-cresol, m-cresol, p-cresol, thymol, p-tert-butylphenol, tert-butylcatechol, catechol, isoeugenol, o-methoxyphenol, 4,4′-dihydroxy Examples include phenyl-2,2-propane, isoamyl salicylate, benzyl salicylate, methyl salicylate, and 2,6-di-tert-butyl-p-cresol. These phenols can be used singly or in combination. On the other hand, aldehydes include formaldehyde, paraformaldehyde, polyoxymethylene, trioxane and the like. These aldehydes can be used alone or in combination of two or more as required.
[0081]
The molecular weight of the phenolic resin is not particularly limited, but is preferably 200 to 2,000 in terms of number average molecular weight, and particularly preferably in the range of 400 to 1,500 because of excellent mechanical properties, fluidity, and economy. The molecular weight of the phenolic resin can be measured by gel permeation chromatography using a tetrahydrafuran solution and a polystyrene standard sample.
[0082]
Examples of the phosphonitrile compound include phosphonitrile compounds mainly composed of a phosphonitrile linear polymer and / or a cyclic polymer, and may be linear, cyclic, or a mixture. The phosphonitrile linear polymer and / or the cyclic polymer can be synthesized by a known method described in the author Sugawara “Synthesis and application of phosphazene compounds”, for example, phosphorus pentachloride or trichloride as a phosphorus source. It can be synthesized by reacting ammonium chloride or ammonia gas as a phosphorus and nitrogen source by a known method (the cyclic product may be purified) and substituting the obtained substance with alcohol, phenol and amines. .
[0083]
Examples of the ammonium polyphosphate include ammonium polyphosphate, ammonium melamine-modified polyphosphate, and ammonium carbamyl polyphosphate, and thermosetting phenol resin, urethane resin, melamine resin, urea resin, epoxy resin, and urea resin. It may be covered with a thermosetting resin such as, and may be used alone or in combination of two or more.
[0084]
Examples of the melamine phosphate include phosphates such as melamine phosphate and melamine pyrophosphate, which may be used alone or in combination of two or more.
[0085]
In the present invention, an ethylene (co) polymer can be further blended for the purpose of improving toughness such as impact strength of the composition of the present invention. Examples of such ethylene (co) polymer include high-density polyethylene and low-density polyethylene. Examples include ethylene polymers such as polyethylene and ultra-low density polyethylene, and / or ethylene copolymers. The above ethylene copolymer is obtained by copolymerizing ethylene and a monomer copolymerizable therewith, Examples of the copolymerizable monomer include propylene, butene-1, vinyl acetate, isoprene, butadiene, monocarboxylic acids such as acrylic acid and methacrylic acid, ester acids thereof, and dicarboxylic acids such as maleic acid, fumaric acid, and itaconic acid. Can be mentioned. The ethylene copolymer can be usually produced by a known method. Specific examples of the ethylene copolymer include ethylene / propylene, ethylene / butene 1, ethylene / vinyl acetate, ethylene / ethyl acrylate, ethylene / methyl acrylate, and ethylene / ethyl methacrylate acrylate. A copolymer obtained by graft polymerization or copolymerization of an unsaturated acid anhydride or glycidyl methacrylate with the above ethylene (co) polymer is also preferably used. These may be used alone or in combination of two or more, and may be used in combination with one or more of the above ethylene (co) polymers. Among ethylene (co) polymers, a copolymer obtained by graft polymerization or copolymerization of an unsaturated acid anhydride or glycidyl methacrylate with polyethylene is preferably used because of its good compatibility with PBT. The blending amount of the ethylene (co) polymer is preferably 1 to 100 parts by weight, particularly preferably 2 with respect to 100 parts by weight of the component (A) from the viewpoint of flame retardancy and impact strength of the resulting composition. ~ 90 parts by weight.
[0086]
In the present invention, a phenoxy resin, an oxazoline compound, a carbodiimide compound, and the like can be blended for the purpose of further improving hydrolysis resistance, and a phenoxy resin is particularly preferably used. Moreover, the addition amount of said hydrolysis resistance improving material is 0.1-20 weight part with respect to 100 weight part of (A) component from the point of hydrolysis resistance of a composition obtained, and a flame retardance. The amount is particularly preferably 0.2 to 18 parts by weight.
[0087]
Moreover, as said phenoxy resin, the phenoxy resin obtained by making an aromatic dihydric phenol type compound and epichlorohydrin react with various compounding ratios is mentioned. The molecular weight of the phenoxy copolymer is not particularly limited, but the viscosity average molecular weight is in the range of 1000 to 100,000. Here, examples of the aromatic dihydric phenol compound include 2,2-bis (4-hydroxyphenyl) propane, 2,2-bis (4-hydroxy-3,5-dimethylphenyl) propane, and bis (4 -Hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, 2,2-bis (4-hydroxy-3,5 diethylphenyl) propane, 1,1-bis (4-hydroxyphenyl) cyclohexane, 1-phenyl-1,1-bis (4-hydroxyphenyl) ethane or the like can be used, and these can be used alone or as a mixture. Further, the shape is not particularly limited, and any of pulverized products, granules, flakes, powders, liquids, and the like can be used. These phenoxy resins can be used alone or in combination of two or more as required.
[0088]
In the present invention, a hindered phenolic antioxidant and / or a phosphite antioxidant can be added as a stabilizer that gives extremely good heat aging resistance even when the composition of the present invention is exposed to a high temperature for a long period of time. The blending amount of the hindered phenol antioxidant and / or the phosphite antioxidant is 0.1 to 15 parts by weight with respect to 100 parts by weight of the component (A) from the viewpoint of heat aging resistance and flame retardancy. Is preferable, and 0.2 to 10 parts by weight is particularly preferable.
[0089]
Specific examples of the hindered phenol antioxidant include triethylene glycol-bis [3- (3-t-butyl-5-methyl-4-hydroxyphenyl) propionate], 1,6-hexanediol. -Bis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], pentaerythrityl-tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] 2,2-thio-diethylenebis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) ) Propionate, 3,5-di-t-butyl-4-hydroxybenzylphosphonate diethyl ester, 1,3,5-trimethyl-2 4,6-tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene, bis or tris (3-t-butyl-6-methyl-4-hydroxyphenyl) propane, N, N′-hexa Methylenebis (3,5-di-t-butyl-4-hydroxy-hydrocinnamamide), N, N′-trimethylenebis (3,5-di-t-butyl-4-hydroxy-hydrocinnamamide) ) And the like.
[0090]
Examples of the phosphite stabilizer include tris (2,4-di-t-butylphenyl) phosphite, 2,2-methylenebis (4,6-di-t-butylphenyl) octylphos Phyto, trisnonylphenyl phosphite, alkylallyl phosphite, trialkyl phosphite, triallyl phosphite, pentaerythritol phosphite compound and the like can be mentioned.
[0091]
In the present invention, it is possible to improve the fluidity and releasability during molding by further adding one or more lubricants. Such lubricants include metal soaps such as gallium stearate and barium stearate, fatty acid esters, fatty acid ester salts (including partially salted products), fatty acid amides such as ethylene bisstearoamide, ethylenediamine and stearic acid Fatty acid amides, polyalkylene waxes, acid anhydride-modified polyalkylene waxes composed of a polycondensate consisting of sebacic acid or polycondensates of phenylenediamine and stearic acid and sebacic acid, and the above-mentioned lubricants and fluororesins or fluorine compounds Examples include, but are not limited to, a mixture. The addition amount of the lubricant is preferably 0.05 to 10 parts by weight, more preferably 0.1 to 5 parts by weight with respect to 100 parts by weight of the component (A).
[0092]
In the present invention, it is also possible to improve or adjust the color tone by blending one or more types of carbon black, titanium oxide, and pigments and dyes of various colors. From the viewpoint of the mechanical characteristics, 0.1 to 30 parts by weight is preferred, more preferably 0.1 to 20 parts by weight, and still more preferably 0.1 to 15 parts by weight with respect to 100 parts by weight of component (A).
[0093]
Examples of the carbon black include channel black, furnace black, acetylene black, anthracene black, oil smoke, pine smoke, and graphite. The average particle diameter is 500 nm or less, and the dibutyl phthalate oil absorption is 50 to 400 cm.^Three/ 100 g of carbon black is preferably used, and may be treated with aluminum oxide, silicon oxide, zinc oxide, zirconium oxide, polyol, silane coupling agent or the like as the treating agent. Further, as the above titanium oxide, carbon black having a crystal form such as a rutile form or anatase form and having an average particle diameter of 5 μm or less is preferably used, and aluminum oxide, silicon oxide, zinc oxide, zirconium oxide, It may be treated with a polyol, a silane coupling agent or the like. In addition, the above-mentioned carbon black, titanium oxide, and various color pigments and dyes are melted with various thermoplastic resins because of improved dispersibility with the flame-retardant resin composition of the present invention and improved handling during production. It may be used as a blended material or a blended mixed material. In particular, the thermoplastic resin is preferably a polyalkylene terephthalate, a vinyl resin or an ethylene (co) polymer from the viewpoint of electrical characteristics such as tracking resistance.
[0094]
In the present invention, it is possible to add one or more known non-halogen flame retardants other than the present invention, and it can be expected that the combustion time during combustion is shortened or the gas generated during combustion is reduced. Such known non-halogen flame retardants include, but are not limited to, for example, aluminum hydroxide, hydrotalcite, boric acid, calcium borate, calcium borate hydrate, zinc borate, zinc borate hydrate, hydroxide Examples include zinc, zinc hydroxide hydrate, zinc tin hydroxide, zinc tin hydroxide hydrate, red phosphorus, heat-expanded graphite and dosonite, thermosetting melamine resin, thermosetting phenolic resin, heat A thermosetting resin such as a curable epoxy resin may be mixed or coated on the surface. In addition, a coupling agent, an epoxy compound, or an oil and fat such as stearic acid may be mixed or coated on the surface.
[0095]
Further, in the flame retardant polybutylene terephthalate resin composition and molded article of the present invention, the sulfur antioxidant, ultraviolet absorber, plasticizer, antistatic agent, etc. A material in which one or more known additives are blended can also be used.
[0096]
The flame-retardant polybutylene terephthalate resin composition and molded article of the present invention are usually produced by a known method. For example, (A) polybutylene terephthalate resin or polybutylene terephthalate resin and polyethylene terephthalate resin, (B) vinyl resin, (C) phosphate ester, (D) salt of triazine compound and cyanuric acid or isocyanuric acid, ( E) Alkaline earth metal compounds and, optionally, fiber reinforcements, fluorine compounds, polycarbonate resins, silicone compounds, phenolic resins, phosphonitrile compounds, ammonium polyphosphate, and melamine phosphate flame retardant aids, ethylene (Co) polymers, inorganic fillers other than fiber reinforcements, hydrolysis resistance improvers, hindered phenolic antioxidants and / or phosphite antioxidants, and other necessary additions as required The pre-mixing agent is supplied to an extruder or without Flame retardant polybutylene terephthalate resin composition is prepared by sufficiently kneading.
[0097]
As an example of the above-mentioned premixing, the effect of the present invention can be exhibited only by dry blending, but mixing can be performed using a mechanical mixing device such as a tumbler, a ribbon mixer, and a Henschel mixer. Further, the fiber reinforcing material may be added by adding a side feeder in the middle of the original loading part and the vent part of a multi-screw extruder such as a twin-screw extruder. In addition, in the case of liquid additives, the quantity is determined from the method of adding a plunger pump by installing a liquid addition nozzle in the middle of the intake section and vent section of a multi-screw extruder such as a twin screw extruder, or from the supply section. It may be a method of supplying with a pump. Further, in producing a flame-retardant polybutylene terephthalate resin composition, for example, but not limited to, for example, a single screw extruder, a twin screw extruder, a three screw screw equipped with a “unimelt” or “dalmage” type screw. An extruder, a kneader type kneader, or the like can be used.
[0098]
The flame retardant polybutylene terephthalate resin composition thus obtained can be molded by a generally known method, for example, a molded product of any shape by injection molding, extrusion molding, compression molding, sheet molding, film molding, etc. In particular, injection molding is suitable, and a molded product obtained by an injection molding method by insert molding in which a part of a metal part is directly integrated with a molded product may be used.
[0099]
In addition, the molded product comprising the flame-retardant polybutylene terephthalate resin composition of the present invention is safe against electric flame inside the device, safety against fire of the molded product itself, appearance of the molded product, mechanical properties, and hydrolysis resistance. It is useful for electrical / electronic parts, mechanical mechanism parts, and automobile parts. Specifically, general home appliances, OA equipment housings, coil bobbins, connectors, relays, disk drive chassis, transformers, electromagnetic switches, switch parts, outlet parts, motor parts, sockets, plugs, capacitors, various cases , Resistors, electrical / electronic parts with built-in metal terminals and conductors, computer-related parts, acoustic parts, audio parts such as laser discs, lighting parts, telegraph / telephone equipment-related parts, air conditioner parts, home appliances such as VTR and TV Examples include parts, copier parts, facsimile parts, optical equipment parts, automobile ignition device parts, automobile connectors, and various automotive electrical parts.
[0100]
In the present invention, a highly flame-retardant molded article having particularly excellent hydrolysis resistance is obtained, so that it is particularly useful for electrical / electronic parts and automotive electrical parts.
[0101]
【Example】
The effects of the present invention will be described in more detail with reference to the following examples. Here, “%” and “part” all represent “% by weight” and “part by weight”. The measuring method of each characteristic is as follows.
[0102]
Reference Example 1 (A) Polybutylene terephthalate resin
Toray PBT-1100S (manufactured by Toray Industries, Inc.), which is <A-1> polybutylene terephthalate resin (hereinafter abbreviated as PBT), was used.
[0103]
Reference Example 2 Polyethylene terephthalate resin
<A-2> Mitsui PETJ005 (manufactured by Mitsui Pet Resin Co., Ltd.) A polyethylene terephthalate resin (hereinafter abbreviated as PET) having an intrinsic viscosity of 0.65 was used.
[0104]
Reference Example 3 (B) Vinyl resin
<B-1> AS resin of styrene / acrylonitrile (74/26 wt%) copolymer was used. The intrinsic viscosity of the AS resin measured at 30 ° C. in a methyl ethyl ketone solvent was 0.52 dl / g.
[0105]
<B-2> A styrene / acrylonitrile / glycidyl methacrylate (74 / 25.5 / 0.5 wt%) copolymer was used (hereinafter abbreviated as epoxy-modified AS resin). The intrinsic viscosity of the epoxy-modified AS resin measured at 30 ° C. in a methyl ethyl ketone solvent was 0.53 dl / g.
[0106]
<B-3> Epoxy-modified styrene / butadiene copolymer (“Epofriend” A1010 manufactured by Daicel Chemical Industries, Ltd.) was used (hereinafter abbreviated as epoxy-modified SBS resin).
[0107]
Reference Example 4 (C) Phosphate ester
<C-1> An aromatic phosphate ester “PX-200” (produced by Daihachi Chemical Co., Ltd.) represented by the following formula (5) was used.
[0108]
Embedded image

[0109]
<C-2> An aromatic phosphate ester “CR741” (produced by Daihachi Chemical Co., Ltd.) represented by the following formula (6) was used.
[0110]
Embedded image

[0111]
Reference Example 5 (D) Salt of triazine compound with cyanuric acid or isocyanuric acid
<D-1> Melamine cyanurate “MCA” (manufactured by Mitsubishi Chemical Corporation) was used (hereinafter abbreviated as MC salt).
[0112]
Reference Example 6 (E) Alkaline earth metal compound
<E-1> Magnesium hydroxide “Kisuma 6E” (manufactured by Kyowa Chemical Industry Co., Ltd.) was used (hereinafter abbreviated as water mug).
[0113]
<E-2> Calcium carbonate “KSS1000” (manufactured by Dowa Calfine) was used (hereinafter abbreviated as charcoal cal).
[0114]
Reference Example 7 (F) Epoxy compound
<F-1> Glycidyl ester of versatic acid “Cardura E10” (manufactured by Japan Epoxy Resin Co., Ltd.) was used.
[0115]
<F-2> Bisphenol A diglycidyl ether “Epicoat 828” (manufactured by Japan Epoxy Resin Co., Ltd.) was used.
[0116]
<F-3> <F-1> Epoxy compound mixed with 20% by weight and <F-2> 80% by weight
Reference Example 8 Fiber reinforcement
<G-1> Chopped strand glass fiber “CS3J948” (manufactured by Nitto Boseki Co., Ltd.) having a fiber diameter of about 10 μm was used (hereinafter abbreviated as GF).
[0117]
Reference Example 9 Fluorine compound
<H-1> Polytetrafluoroethylene “Teflon 6J” (manufactured by Mitsui DuPont Fluorochemical Co., Ltd.) was used (hereinafter abbreviated as Teflon).
[0118]
Reference Example 10 Flame retardant aid
<I-1> Polycarbonate resin
"Iupilon" S3000 (manufactured by Mitsubishi Engineering Plastics) was used (hereinafter abbreviated as PC resin).
[0119]
<I-2> Silicone powder “DC4-7105” (manufactured by Dow Corning Toray, Inc.) was used as the silicone compound.
[0120]
<I-3> As a novolac type phenol resin, “Sumilite Resin” PR53195 (manufactured by Sumitomo Durez) was used.
[0121]
<I-4> Phosphononitrile compound
Hexachlorocyclotriphosphazene (cyclic trimer) and phenol were reacted in THF in the presence of triethylamine. The resulting reaction solution was evaporated to dryness and washed with water to remove salts. Yield 95%. The phosphonitrile cyclic polymer thus obtained was recrystallized and purified from acetone. The number average polymerization degree n was not changed and n = 3.
[0122]
Reference Example 11 Ethylene copolymer
<J-1> Ethylene ethyl acrylate copolymer “A-709” (Mitsui DuPont Polychemical Co., Ltd.) was used.
[0123]
Reference Example 12 Inorganic filler other than fiber reinforcement
<K-1> Silicate talc “LMS300” (manufactured by Fuji Talc) was used.
[0124]
  Reference Example 13 Hindered phenolic antioxidant and / or phosphite antioxidant
  <L-1> Hindered phenolic antioxidant “IR-1010” of pentaerythrityl-tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] (manufactured by Ciba Geigy Japan)
  <L-2> Phosphite-based antioxidant “Mark PEP-36” of pentaerythritol-based phosphite compound (manufactured by Asahi Denka)
  Example 119Comparative Examples 1 to17
  (A) PBT, PET, (B) vinyl resin, (C) Phosphate ester, using a twin screw extruder with a screw diameter of 30 mm and L / D35 with the same direction rotating vent (manufactured by Nippon Steel Works, TEX-30α) , (D) MC salt, (E) alkaline earth metal compound, (F) epoxy compound, other additives <H-1>, <I-1 to I-4>, <J-1>, <K -1>, <L-1>, <L-2>, and the like were mixed in the blending compositions shown in Tables 1 and 2 and added from the original filling portion. Moreover, in the example which mix | blends GF of <G-1>, it is Table 1 by the same method as the above except having installed the side feeder in the middle of the original loading part and the vent part, and adding GF.Table 2The formulation of the addition amount shown in (5) was added from the original storage part. In addition, it melt-mixed on the extrusion conditions of kneading | mixing temperature 270 degreeC and screw rotation 150rpm, discharged in strand shape, let the cooling bath pass, and pelletized with the strand cutter.
[0125]
After drying the obtained pellets, each test piece was then molded by an injection molding machine, and the physical properties were measured under the following conditions. Tables 1 and 3 show the results.
[0126]
(1) Flame resistance
Using an IS55EPN injection molding machine manufactured by TOSHIBA MACHINE Co., Ltd., injection molding of a test piece for flame retardancy was performed under conditions of a molding temperature of 270 ° C. and a mold temperature of 80 ° C., and in accordance with the evaluation criteria set forth in the UL94 vertical test Flammability was evaluated. The flame retardancy is ranked in the order of V-0> V-1> V-2, with the flame retardance decreasing. The thickness of the test piece is 1/16 inch (about 1.59 mm, hereinafter abbreviated as 1/16 ") and 1/32 inch (about 0.79 mm, hereinafter abbreviated as 1/32"). The thinner the value, the more severe the flame retardancy. Moreover, the material which was inferior in combustibility and did not correspond to said flame retardance rank was made into the outside of specification.
[0127]
(2) Tensile strength
Using a Toshiba Machine IS55EPN injection molding machine, an ASTM No. 1 dumbbell having a thickness of 3 mm was injection molded under conditions of a molding temperature of 270 ° C. and a mold temperature of 80 ° C., and the tensile strength was measured according to ASTM D638.
[0128]
(3) Fluidity
Similarly to the above flame retardancy, a test piece for evaluation of 1/16 inch (about 1.59 mm) thickness flame retardancy using IS55EPN injection molding machine manufactured by Toshiba Machine under the conditions of a molding temperature of 270 ° C. and a mold temperature of 80 ° C. The minimum molding pressure of the lowest molding pressure at which the test piece was filled was determined.
[0129]
The lower the molding lower limit pressure, the better the fluidity during injection molding.
[0130]
(4) Color tone and color tone change
Tabai Co., Ltd., temperature-controlled at 150 ° C, using a 80 mm x 80 mm x 3 mm thick square plate injection molded using a Toshiba Machine IS55EPN injection molding machine under conditions of a molding temperature of 270 ° C and a mold temperature of 80 ° C. The hot air dryer “HighTempOven” PVH210 was charged and heat-treated for 100 hours.
[0131]
The yellowness (YI) of the color tone of the square plate before the drying machine was measured using an SM color computer manufactured by Suga Test Instruments. Note that the smaller the value of YI, the closer to white and the better the color tone.
[0132]
In addition, the color change of the square plate before and after the dryer was introduced was measured for the L, a and b Hunter color differences using an SM color computer manufactured by Suga Test Instruments Co., Ltd.
[0133]
The smaller the Hunter color difference value, the less the color tone changes.
[0134]
(5) Bleed-out test
Tabai Co., Ltd., temperature controlled at 150 ° C, using a 80 mm x 80 mm x 3 mm thick square plate injection molded using a Toshiba Machine IS55EPN injection molding machine at a molding temperature of 270 ° C and a mold temperature of 80 ° C. The hot air dryer “HighTempOven” PVH210 was charged and heat-treated for 100 hours.
[0135]
The appearance of the square plate before and after the drying machine was visually observed, and the presence or absence of bleed out was determined according to the following criteria.
[0136]
Here, the bleed out is a phenomenon in which a part of the compound in the molded product composition is stained on the surface of the molded product.
[0137]
○: Bleed-out is not observed in the molded product before and after the dryer
Δ: Bleed-out is not observed in the molded product before entering the dryer
However, bleed-out is observed in the molded product after the dryer is loaded
×: Bleed-out is observed in the molded product before and after the dryer is charged
(6) Hydrolysis resistance
Using an IS55EPN injection molding machine manufactured by TOSHIBA MACHINE Co., Ltd., injection molding of ASTM No. 1 dumbbell pieces having a molding temperature of 270 ° C. and a mold temperature of 80 ° C. was performed. After hydrolysis for 100 hours under the condition of 100% RH, the tensile strength was measured according to ASTM D648, and the measured value is expressed as a percentage of the value divided by the tensile strength of the untreated product. It was.
[0138]
[Table 1]

[0139]
[Table 2]

[0140]
[Table 3]

[0141]
  Examples 1 to 1 in Table 17From the evaluation results of Comparative Examples 1 to 4 with no GF added, Examples 1 to7A composition in which a vinyl resin, a phosphate ester, an MC salt, an alkaline earth metal compound, and an epoxy compound are blended with the PBT of the present invention shown in FIG. It can be seen that a molded article having excellent flowability and no bleed-out on the surface of the molded article is obtained, and a molded article having an excellent appearance is obtained, and a reliable molded article having excellent hydrolysis resistance is obtained. Moreover, in the said Example, when the epoxy modified AS resin was used as a vinyl-type resin, the performance balanced especially was shown. Also, an example in which an epoxy compound containing an alkaline earth metal compound and a monofunctional epoxy compound was blended5And examples7Is the most excellent hydrolysis resistance, and also contains a monofunctional epoxy compound5Was particularly excellent in the balance between fluidity and hydrolysis resistance.
[0142]
On the other hand, from Comparative Example 1, bleed-out was observed in the molded product before and after the dryer was introduced unless a vinyl resin was blended.
[0143]
Further, from Comparative Examples 2 to 3, in the case where the phosphoric acid ester or the MC salt is an unblended composition, the flame retardancy is outside the standard as with PBT, the flame retardancy is not improved, and the flame retardancy A composition could not be obtained.
[0144]
Further, from Comparative Example 4, if an alkaline earth metal compound was not blended, the hydrolysis resistance was poor and the use was greatly limited.
[0145]
  Examples8~10And from Comparative Examples 5-8, by mix | blending GF of a fibrous reinforcement, tensile strength becomes high remarkably and a high intensity | strength PBT resin composition is obtained.
[0146]
  Example of Table 18~10A composition in which a vinyl resin, a phosphate ester, an MC salt, an alkaline earth metal compound, an epoxy compound, and GF are blended with the PBT of the present invention shown in FIG. Excellent flowability during molding, no bleed-out product is observed on the surface of the molded product, so that a molded product with an excellent appearance can be obtained, and it can be seen that the molded product has excellent hydrolysis resistance and is reliable. .
[0147]
On the other hand, from the comparative example 5, in the case of the GF reinforced composition not containing the vinyl resin, bleed out was observed in the molded product before and after the dryer was introduced, and the molded product had no commercial value.
[0148]
Moreover, from Comparative Examples 6-7, in the case of GF reinforcement | strengthening composition in which either phosphate ester or MC salt is unblended, flame retardance showed the non-standard and the flame retardance improvement was not recognized.
[0149]
Moreover, although the epoxy compound of the comparative example 8 was mix | blended, the material which does not mix | blend an alkaline-earth metal compound was a material inferior to hydrolysis resistance, and the use was restrict | limited greatly. Moreover, it is clear from the above fact that the hydrolysis resistance is not greatly improved only by the epoxy compound.
[0150]
  Examples of Table 110The composition of the present invention in which the amount of MC salt shown in FIG. 1 was increased dramatically improved flame retardancy, exhibited V-0 even at a thickness of 1/32 ", and maintained other excellent performances.
[0151]
The composition of 1/32 "thickness V-0 using a general halogenated flame retardant blended with the brominated polycarbonate resin of Comparative Example 7 in Table 1 and antimony trioxide and 1/32 of Example 15 of the present invention. “Comparison of the composition of thickness V-0, it is clear that the composition of the present invention is a material having high mechanical strength, excellent fluidity at the time of injection molding and resistance to hydrolysis.
[0152]
  Example of Table 211~19The composition of the present invention shown in Examples9This composition improves the flame retardancy, hydrolysis resistance, heat aging resistance and the like of the composition.
[0153]
  Examples shown in Table 311~14From this, it can be seen that the flame retardancy is improved while maintaining other performances by blending the PC resin, silicone compound, phenol resin and phosphonitrile compound.
[0154]
  Examples15~16By blending the ethylene copolymer or talc, the tracking resistance (the breakdown voltage (V) at which the insulation of the molded product is broken in accordance with the test method shown in the IEC Publication 112 standard) Improved) from a breakdown voltage of less than 600 V to a breakdown voltage of 600 V or more, and a molded article having excellent electrical characteristics was obtained. However, in the case of an ethylene copolymer, the flame retardancy decreased.
[0155]
  Examples17~19Examples and compositions containing various antioxidants9Example 1 ASTM No. 1 dumbbell was put into a Tabai Gir oven (treated at 180 ° C for 300 hours) and the tensile strength was measured.9The tensile strength retention rate of each composition improved by about 15% or more. Therefore, it can be seen that the addition of the antioxidant improves the heat aging resistance while maintaining other performances.
[0156]
  Comparative examples shown in Table 2 and Table 315~17In place of the vinyl resin of the composition of the present invention, a polyphenylene ether resin, a polyphenylene sulfide resin, and a nylon 6 resin, which are known as thermoplastic resins that are superior in flame retardancy than vinyl resins and PBT resins, are replaced with vinyl resins. It is the composition which mix | blended 25 weight part similarly.
[0157]
From Table 3, although the polyphenylene ether resin and the polyphenylene sulfide resin have improved flame retardancy, they are molded products that are greatly inferior in performance in terms of tensile strength, fluidity, color tone, color change, and hydrolysis resistance. Because of the large color change, it was a material that greatly damaged the product value. Nylon 6 resin was a molded product that was greatly inferior in all performance including flame retardancy.
[0158]
【The invention's effect】
A specific amount of vinyl resin, phosphate ester, salt of triazine compound and cyanuric acid or isocyanuric acid, alkaline earth metal compound, epoxy compound, and optionally fiber reinforcement, fluorine compound In addition, while maintaining a high level of flame retardancy, it has excellent mechanical properties and fluidity during injection molding, is less likely to bleed out, and has excellent hydrolysis resistance. High non-halogen flame-retardant polybutylene terephthalate resin composition and resin molded product can be obtained, and it can be expected to greatly contribute to the market expansion of automobile parts, electric / electronic parts and mechanical parts.

Claims (9)

(A) 100 parts by weight of polybutylene terephthalate resin or a total of 100 parts by weight of polybutylene terephthalate resin and polyethylene terephthalate resin, (B) 1 to 100 parts by weight of vinyl resin, (C) 1 to 100 parts by weight of phosphate ester (D) Flame retardant polybutylene terephthalate comprising 1 to 150 parts by weight of a salt of a triazine compound and cyanuric acid or isocyanuric acid, and (E) 0.1 to 10 parts by weight of an alkaline earth metal compound A resin composition, wherein (B) the vinyl-based resin is a copolymer obtained by copolymerizing acrylonitrile, styrene, and glycidyl methacrylate, and 50 to 99% by weight of styrene with respect to the total of styrene and acrylonitrile, acrylonitrile 50% to 1% by weight, based on the copolymer, glycidyl methacrylate Rate flame retardant polybutylene terephthalate resin composition is 0.1 to 5 wt%. (A) The flame-retardant polybutylene terephthalate resin composition according to claim 1, which is 99 to 1% by weight of polybutylene terephthalate resin and 1 to 99% by weight of polyethylene terephthalate resin based on the total of polybutylene terephthalate resin and polyethylene terephthalate resin. object. (E) The flame-retardant polybutylene terephthalate resin composition according to claim 1, wherein the alkaline earth metal compound is one or more alkaline earth metal compounds selected from magnesium, calcium, and barium. (E) The flame-retardant polybutylene terephthalate resin composition according to any one of claims 1 to 3, wherein the alkaline earth metal compound is magnesium hydroxide and / or calcium carbonate. (F) an epoxy compound further formed by 0.05 to 10 parts by weight blended flame retardant polybutylene alkylene terephthalate resin composition according to any one of claims 1 to 4. 6. The flame-retardant polybutylene terephthalate resin composition according to claim 5 , wherein the epoxy compound is an epoxy compound using a glycidyl ester compound and / or a glycidyl ether compound having an epoxy equivalent of 500 g / equivalent or less. The flame retardant polybutylene terephthalate resin composition according to any one of claims 5 to 6, wherein the epoxy compound is a monofunctional glycidyl ester compound having an epoxy equivalent of 500 g / equivalent or less. The flame retardant polybutylene terephthalate resin composition according to any one of claims 1 to 7, wherein the phosphoric acid ester of (C) is an aromatic phosphoric acid ester of the following formula (1).

(In the above formula, Ar ¹ , Ar ² , Ar ³ , Ar ⁴ represent the same or different aromatic groups that do not contain halogen. X is selected from the following formulas (2) to (4): In the formulas (2) to (4), R ^{1 to} R ⁸ represent the same or different hydrogen atoms or alkyl groups having 1 to 5 carbon atoms, Y is a direct bond, O, S, SO ₂ , C (CH ₃ ) ₂ , CH ₂ , CHPh, Ph represents a phenyl group, n in the formula (1) is an integer of 0 or more, and k and m in the formula (1) are respectively It is an integer from 0 to 2, and (k + m) is an integer from 0 to 2.

A molded article used for a mechanical mechanism part, an electric / electronic part, or an automobile part, comprising the flame-retardant polybutylene terephthalate resin composition according to any one of claims 1 to 8.