JP2008130375A - Arc-extinguishing resin processed product, and circuit breaker using it - Google Patents

Arc-extinguishing resin processed product, and circuit breaker using it Download PDF

Info

Publication number
JP2008130375A
JP2008130375A JP2006314499A JP2006314499A JP2008130375A JP 2008130375 A JP2008130375 A JP 2008130375A JP 2006314499 A JP2006314499 A JP 2006314499A JP 2006314499 A JP2006314499 A JP 2006314499A JP 2008130375 A JP2008130375 A JP 2008130375A
Authority
JP
Japan
Prior art keywords
arc
resin
processed product
extinguishing
group
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2006314499A
Other languages
Japanese (ja)
Other versions
JP4817316B2 (en
Inventor
Hiromasa Yanase
博雅 柳瀬
Toshiyuki Kanno
敏之 管野
Shuichi Sugiyama
修一 杉山
Junko Shigehara
淳孝 重原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Electric Co Ltd
Tokyo University of Agriculture and Technology NUC
Tokyo University of Agriculture
Original Assignee
Tokyo University of Agriculture and Technology NUC
Tokyo University of Agriculture
Fuji Electric Holdings Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokyo University of Agriculture and Technology NUC, Tokyo University of Agriculture, Fuji Electric Holdings Ltd filed Critical Tokyo University of Agriculture and Technology NUC
Priority to JP2006314499A priority Critical patent/JP4817316B2/en
Priority to DE102007055667A priority patent/DE102007055667B4/en
Priority to CN2007101934348A priority patent/CN101186728B/en
Publication of JP2008130375A publication Critical patent/JP2008130375A/en
Application granted granted Critical
Publication of JP4817316B2 publication Critical patent/JP4817316B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/49—Phosphorus-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/28—Treatment by wave energy or particle radiation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/013—Fillers, pigments or reinforcing additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C08L23/0853—Vinylacetate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
    • C08L29/02—Homopolymers or copolymers of unsaturated alcohols
    • C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L59/00—Compositions of polyacetals; Compositions of derivatives of polyacetals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/302—Means for extinguishing or preventing arc between current-carrying parts wherein arc-extinguishing gas is evolved from stationary parts
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/49—Phosphorus-containing compounds
    • C08K5/5399—Phosphorus bound to nitrogen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
    • C08L29/02—Homopolymers or copolymers of unsaturated alcohols
    • C08L29/06—Copolymers of allyl alcohol
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
    • C08L71/02—Polyalkylene oxides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate

Abstract

<P>PROBLEM TO BE SOLVED: To provide an arc-extinguishing resin processed product capable of generating a pyrolysis gas hardly contributing to internal pressure rise and capable of efficiently extinguishing an arc generated in shutting off a circuit, having heat resistance resistant to temperature rise occurring then, and pressure tightness resistant to internal pressure rise, and excelling in flame resistance; and a circuit breaker using it. <P>SOLUTION: In this circuit breaker provided with a fixed contact having a fixed contact point, a moving contact having a moving contact point contacting the fixed contact, and carrying out switching operation with respect to the fixed contact, and an arc-extinguishing device extinguishing an arc generated when the fixed contact and the moving contact carry out the switching operation, this arc-extinguishing resin processed product is composed, for the arc-extinguishing device, by molding a resin composition containing a polyolefin resin containing 0.2-0.7 mol of a hydrocarbon group in 1 mol of a methylene group with a part of hydrogen atoms of a methylene chain substituted by the hydrocarbon group, and a reactive organic phosphorous-based flame retarder having a terminal unsaturated bond, and thereafter applying radiation crosslinking thereto. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、回路遮断器などの電流遮断時に接点から発生するアークを消弧するために使用される、難燃性を備えた消弧用樹脂加工品及びこれを用いた回路遮断器に関する。   The present invention relates to an arc-extinguishing resin processed product having flame retardancy and a circuit breaker using the same, which are used to extinguish an arc generated from a contact at the time of current interruption such as a circuit breaker.

回路遮断器などにおいて、過剰電流または定格電流の通電時に可動接触子の接点と固定接触子の接点を開離させると、接点間にアークが発生する。このアークを消弧するには、通常、アーク発生部の周囲に、消弧部材からなる消弧室を備えた消弧装置を配設している。そして、アークによって消弧部材を熱分解させて、この消弧部材から発生する熱分解ガスによってアークを消弧している。   In a circuit breaker or the like, when the contact of the movable contact and the contact of the fixed contact are opened when an excess current or a rated current is applied, an arc is generated between the contacts. In order to extinguish this arc, an arc extinguishing device having an arc extinguishing chamber made of an arc extinguishing member is usually arranged around the arc generating portion. Then, the arc extinguishing member is pyrolyzed by the arc, and the arc is extinguished by the pyrolysis gas generated from the arc extinguishing member.

これら消弧部材には、不飽和ポリエステル樹脂（特許文献１参照）、メラミン樹脂（特許文献２参照）などの熱硬化性樹脂や、ポリオレフィン樹脂、ポリアミド樹脂、ポリアセタール樹脂（特許文献３参照）などの熱可塑性樹脂などがマトリックス樹脂として主に用いられている。   These arc extinguishing members include thermosetting resins such as unsaturated polyester resins (see Patent Document 1) and melamine resins (see Patent Document 2), polyolefin resins, polyamide resins, and polyacetal resins (see Patent Document 3). A thermoplastic resin or the like is mainly used as the matrix resin.

しかしながら、熱硬化性樹脂は成形時にバリが生じやすいことから、成形加工性が熱可塑性樹脂に比べて劣るという問題点があった。更には、アーク消弧時には、消弧部材から熱分解ガスが発生するため、消弧装置内の内圧が高まるが、比較的硬いものの、破損しやすく、耐圧強度に劣る熱硬化性樹脂では、消弧装置の小型化が困難であった。   However, since the thermosetting resin tends to generate burrs during molding, there is a problem that molding processability is inferior to that of a thermoplastic resin. Furthermore, when arc extinguishing, pyrolysis gas is generated from the arc extinguishing member, so that the internal pressure in the arc extinguishing device increases. However, it is relatively hard, but it is easily damaged and the thermosetting resin having poor pressure strength is extinguished. It was difficult to reduce the size of the arc device.

また、熱可塑性樹脂は、成形時にバリなどは生じにくいものの、強度、耐圧性、耐熱性が劣り、消弧部材が経時で変形ないし劣化する傾向にあった。一方、芳香族ポリアミド樹脂などのように芳香族環の含有量の多い熱可塑性樹脂は、比較的、強度、耐圧性、耐熱性に優れるものの、燃焼時に遊離炭素を放出しやすい。このため消弧装置を炭素で腐食される虞れがあり、消弧装置の絶縁性が損なわれるといった問題があった。   In addition, the thermoplastic resin hardly generates burrs during molding, but has poor strength, pressure resistance, and heat resistance, and the arc extinguishing member tends to be deformed or deteriorated with time. On the other hand, a thermoplastic resin having a large aromatic ring content, such as an aromatic polyamide resin, is relatively excellent in strength, pressure resistance, and heat resistance, but easily releases free carbon during combustion. For this reason, there exists a possibility that an arc-extinguishing apparatus may be corroded by carbon, and there existed a problem that the insulation of an arc-extinguishing apparatus was impaired.

また、熱可塑性樹脂や熱硬化性樹脂の強度、耐圧性、耐熱性などを向上させるため、強化繊維などの無機フィラーを添加するといった試みがなされているものの（特許文献１〜４参照）、無機フィラーの含有量の増加に伴い熱分解ガスの発生量が減少する傾向にあり、消弧性が低下するという問題があった。   Moreover, in order to improve the strength, pressure resistance, heat resistance, etc. of thermoplastic resins and thermosetting resins, attempts have been made to add inorganic fillers such as reinforcing fibers (see Patent Documents 1 to 4), but inorganic As the filler content increased, the amount of pyrolysis gas tended to decrease, and there was a problem that arc extinguishing performance decreased.

一方、下記特許文献５には、ポリエステルやポリアミドなどの熱可塑性樹脂に電子線処理を施して得られる樹脂加工品を用いた回路遮断器が開示されている。   On the other hand, Patent Document 5 below discloses a circuit breaker using a resin processed product obtained by subjecting a thermoplastic resin such as polyester or polyamide to electron beam treatment.

また、近年、回路遮断器に使用される樹脂材料に対して要求される難燃性レベルが向上する傾向にある。その対策として、難燃性樹脂をマトリックス樹脂として消弧材料に用いることが考えられる。そして、樹脂の難燃化には、臭素などのハロゲン化合物が有効であることが知られており、ハロゲン化合物を添加した樹脂が難燃性樹脂として汎用的に使用されている。しかしながら、ハロゲン化合物を大量に含む難燃性樹脂は、燃焼条件によってはダイオキシン類が発生する可能性があり、環境負荷の見地より、近年ハロゲン化合物を含有しない非ハロゲン系難燃性樹脂の使用が望まれている。
特許第３０９８０４２号明細書 特開平２−２５６１１０号公報 特開平７−３０２５３５号公報 特開平８−１７１８４７号公報 国際公開２００３−０４４８１８号パンフレット In recent years, the flame retardancy level required for resin materials used for circuit breakers has been increasing. As a countermeasure, it is conceivable to use a flame retardant resin as a matrix resin for the arc extinguishing material. And, it is known that halogen compounds such as bromine are effective for making the resin flame-retardant, and resins to which a halogen compound is added are widely used as flame-retardant resins. However, flame retardant resins containing a large amount of halogen compounds may generate dioxins depending on the combustion conditions. From the standpoint of environmental impact, the use of non-halogen flame retardant resins that do not contain halogen compounds has recently been used. It is desired.
Japanese Patent No. 3098042 JP-A-2-256110 Japanese Patent Laid-Open No. 7-302535 JP-A-8-171847 International Publication No. 2003-044818 Pamphlet

熱可塑性樹脂に架橋処理を施すことで、強度、耐熱性や耐圧性などに関しては向上が認められるものの、消弧性に関しては向上が認められなかった。また、アーク消弧時に発生する熱分解ガスによる消弧装置内の内圧上昇もほとんど抑制できず、アーク消弧時の内圧上昇により消弧装置が破損しやすかった。更には、難燃性について課題を有するものであった。   Although the improvement in strength, heat resistance, pressure resistance and the like was recognized by applying a crosslinking treatment to the thermoplastic resin, no improvement was observed in the arc extinguishing property. In addition, the increase in internal pressure in the arc extinguishing device due to pyrolysis gas generated during arc extinguishing could hardly be suppressed, and the arc extinguishing device was easily damaged by the increase in internal pressure during arc extinguishing. Furthermore, it has a problem about flame retardancy.

したがって、本発明の目的は、内圧上昇が少なく、回路遮断時に発生するアークを効率よく消弧できる熱分解ガスを発生でき、更には、その際に起こる温度上昇に耐える耐熱性及び内圧上昇に耐えうる耐圧性を備え、難燃性に優れる消弧用樹脂加工品及びそれを用いた回路遮断器を提供することにある。   Therefore, an object of the present invention is to generate a pyrolysis gas that can suppress the arc generated at the time of circuit interruption with little increase in internal pressure, and further withstand heat resistance and internal pressure increase that can withstand the temperature increase that occurs at that time. An object of the present invention is to provide an arc-extinguishing resin processed article having excellent pressure resistance and excellent flame retardancy, and a circuit breaker using the same.

上記目的を達成するため、本発明の消弧用樹脂加工品は、メチレン鎖の水素原子の一部が水酸基で置換され、メチレン基１モルに対して、水酸基を０．２〜０．７モル含有するポリオレフィン樹脂（Ａ）と、末端不飽和結合を有する反応性有機リン系難燃剤（Ｂ）とを含む樹脂組成物を、成形後に放射線架橋を施したことを特徴とする。   In order to achieve the above object, in the arc extinguishing resin processed product of the present invention, a part of the hydrogen atoms of the methylene chain is substituted with a hydroxyl group, and the hydroxyl group is 0.2 to 0.7 mol per 1 mol of the methylene group. The resin composition containing the contained polyolefin resin (A) and the reactive organophosphorus flame retardant (B) having a terminal unsaturated bond is subjected to radiation crosslinking after molding.

上記本発明の消弧用樹脂加工品によれば、放射線によって、反応性有機リン難燃剤（Ｂ）の末端不飽和結合と、ポリオレフィン樹脂（Ａ）とが反応し、三次元網目状に架橋しているので、難燃剤成分が樹脂中に安定して取り込まれている。このため、難燃剤のブリードアウトが少なく、長期にわたって難燃性を発揮できると共に、ポリオレフィン樹脂（Ａ）が三次元網目状に架橋しているので、強度、耐熱性、耐圧性が向上している。   According to the arc extinguishing resin processed product of the present invention, the terminal unsaturated bond of the reactive organophosphorus flame retardant (B) reacts with the polyolefin resin (A) by radiation, and is crosslinked in a three-dimensional network. Therefore, the flame retardant component is stably incorporated in the resin. For this reason, there is little bleed-out of a flame retardant, it can exhibit flame retardance over a long period of time, and since the polyolefin resin (A) is crosslinked in a three-dimensional network, the strength, heat resistance, and pressure resistance are improved. .

また、このポリオレフィン樹脂（Ａ）は、熱分解によって側鎖に有するＯＨ基が解離し易いので、水素ガス、Ｈ２Ｏ、Ｏ２及びＯの含有量の高い熱分解ガスを発生できる。このため、アークを速やかに消弧できると共に、タール分などのアークの消弧に対する寄与が乏しい成分の含有量が少なく、消弧装置内の内圧を抑制できる。そして、アーク消弧時において、消弧装置に炭素が付着されにくいので、消弧装置の絶縁性を損なうこともない。 Also, the polyolefin resin (A), because it is easy OH group is dissociated with the thermal decomposition in the side chain, can generate hydrogen gas, H 2 O, a high pyrolysis gas of the content of O 2 and O. For this reason, the arc can be extinguished quickly, and the content of components such as tar that do not contribute significantly to the arc extinction is small, and the internal pressure in the arc extinguishing device can be suppressed. Further, since carbon is hardly attached to the arc extinguishing device during arc extinguishing, the insulating property of the arc extinguishing device is not impaired.

また、本発明の消弧用樹脂加工品は、前記樹脂組成物が、オキシメチレンから誘導される繰り返し単位の含有量が７５〜１００モル％であるポリアセタール系樹脂（Ｃ）を、前記ポリオレフィン樹脂（Ａ）１００質量部に対して５〜９０質量部含有することが好ましい。ポリアセタール系樹脂は、消弧作用の高い熱分解ガスを発生できるものの、溶融混練での成形が困難であることから成形加工性に劣り、また、熱分解ガスの発生量が高く、更には、該熱分解ガスは内圧上昇への寄与が比較的高いものであることから、消弧装置内の内圧が上昇しやすい。この態様によれば、上記ポリオレフィン樹脂（Ａ）と、上記ポリアセタール系樹脂（Ｃ）とを併用したことで、樹脂組成物の成形加工性を損なうことなく、消弧性を向上できる。   In the arc extinguishing resin processed product of the present invention, the resin composition contains a polyacetal-based resin (C) in which the content of repeating units derived from oxymethylene is 75 to 100 mol%, and the polyolefin resin ( A) It is preferable to contain 5-90 mass parts with respect to 100 mass parts. Polyacetal-based resins can generate pyrolysis gas with high arc extinguishing action, but are inferior in molding processability due to difficulty in molding by melt-kneading, and the generation amount of pyrolysis gas is high. Since pyrolysis gas has a relatively high contribution to the increase in internal pressure, the internal pressure in the arc extinguishing device tends to increase. According to this aspect, by using the polyolefin resin (A) and the polyacetal resin (C) in combination, it is possible to improve arc extinguishing properties without impairing the moldability of the resin composition.

また、本発明の消弧用樹脂加工品は、前記樹脂組成物が、前記樹脂組成物が、ガラスファイバー、チタン酸バリウムウィスカー、シリカゲル微粒子、ベーマイト、タルク、炭酸マグネシウム及び金属水酸化物から選ばれた１種以上の無機フィラー（Ｄ）を、１〜７０質量％含有することが好ましい。この態様によれば、樹脂加工品の強度及び耐圧性を向上できる。   Further, in the arc extinguishing resin processed product of the present invention, the resin composition is selected from glass fiber, barium titanate whisker, silica gel fine particles, boehmite, talc, magnesium carbonate and metal hydroxide. It is preferable to contain 1-70 mass% of 1 or more types of inorganic fillers (D). According to this aspect, the strength and pressure resistance of the resin processed product can be improved.

また、本発明の消弧用樹脂加工品は、前記ポリオレフィン樹脂（Ａ）の分解潜熱が３０ｃａｌ／g以上であることが好ましい。   In the arc extinguishing resin processed product of the present invention, the decomposition latent heat of the polyolefin resin (A) is preferably 30 cal / g or more.

また、本発明の消弧用樹脂加工品は、前記ポリオレフィン樹脂（Ａ）が、エチレン−ビニルアルコール共重合体であることが好ましい。   In the arc extinguishing resin processed product of the present invention, the polyolefin resin (A) is preferably an ethylene-vinyl alcohol copolymer.

上記各態様によれば、消弧性に優れた熱分解ガスを発生できるので、アークを速やかに消弧することができ、アーク電圧が損なわれにくい。   According to each said aspect, since the pyrolysis gas excellent in arc extinguishing property can be generated, an arc can be extinguished rapidly and an arc voltage is hard to be impaired.

また、本発明の消弧用樹脂加工品は、前記応性有機リン系難燃剤（Ｂ）が、下記式（Ｉ）及び／又は下式（ＩＩ）に示される有機リン化合物であり、前記樹脂組成物中に０．５〜２０質量％含有することが好ましい。   Further, in the arc extinguishing resin processed product of the present invention, the responsive organophosphorus flame retardant (B) is an organophosphorus compound represented by the following formula (I) and / or the following formula (II): It is preferable to contain 0.5-20 mass% in a thing.

（式（Ｉ）中、Ｒ１〜Ｒ４はそれぞれＣＨ２＝ＣＹ１−Ｙ２−、又はヘテロ原子を含んでもよい一官能性の芳香族炭化水素系基を表し、Ｒ５はヘテロ原子を含んでもよい二官能性の芳香族炭化水素系基を表す。Ｘ１〜Ｘ４はそれぞれ−Ｏ−、−ＮＨ−、−（ＣＨ２＝ＣＹ１−Ｙ２）Ｎ−より選択される基を表し、Ｘ１〜Ｘ４の少なくとも１つは−ＮＨ−、又は−（ＣＨ２＝ＣＹ１−Ｙ２）Ｎ−を含む。Ｒ１〜Ｒ４及びＸ１〜Ｘ4の少なくとも１つはＣＨ２＝ＣＹ１−Ｙ２−を含む。Ｙ１は水素又はメチル基を表し、Ｙ２は炭素数１〜５のアルキレン基、又は−ＣＯＯ−Ｙ３−を表す。ここで、Ｙ３は炭素数１〜５のアルキレン基を表す。） (In formula (I), R 1 to R 4 each represents CH 2 ═CY 1 —Y 2 — or a monofunctional aromatic hydrocarbon group that may contain a hetero atom, and R 5 represents a hetero atom. X 1 to X 4 each represents a group selected from —O—, —NH—, and — (CH 2 ═CY 1 —Y 2 ) N—. And at least one of X 1 to X 4 contains —NH— or — (CH 2 ═CY 1 —Y 2 ) N—, wherein at least one of R 1 to R 4 and X 1 to X 4 is CH. 2 = CY 1 -Y 2 -is included, Y 1 represents hydrogen or a methyl group, Y 2 represents an alkylene group having 1 to 5 carbon atoms, or —COO—Y 3 —, where Y 3 represents carbon. Represents an alkylene group of formula 1-5.)

（式（ＩＩ）中、１分子中に少なくとも１つのＰ−Ｃ結合を含み、Ａｒ1とＡｒ２は、それぞれ炭素数２０以下の易動性水素を含まない二官能性芳香族炭化水素系基を表し、ｎは０〜２の整数である。Ｒ６〜Ｒ１０はそれぞれ、−ＮＨＣＨ２ＣＨ=ＣＨ２、−Ｎ(ＣＨ２ＣＨ＝ＣＨ２)２、−ＯＣＨ２ＣＨ＝ＣＨ２、−ＣＨ２ＣＨ＝ＣＨ２、−ＣＨ２ＣＨ２ＯＣＨ＝ＣＨ２、−(Ｃ６Ｈ４)−ＣＨ＝ＣＨ２、−Ｏ(Ｃ６Ｈ４)−ＣＨ＝ＣＨ２、−ＣＨ２(Ｃ６Ｈ４)−ＣＨ＝ＣＨ２、−ＮＨ(Ｃ６Ｈ４)−ＣＨ＝ＣＨ２、−Ｎ(ＣＨ２ＣＨ＝ＣＨ２)−(Ｃ６Ｈ４)−ＣＨ＝ＣＨ２、−Ｏ−Ｒ−ＯＯＣ−Ｃ(Ｒ’)＝ＣＨ２、−ＮＨ−Ｒ−ＮＨＣＯ−Ｃ(Ｒ’)＝ＣＨ２、炭素数１２以下のアリール基より選択される基を表す。ここで、Ｒは炭素数２〜５のアルキレン基、Ｒ’は水素またはメチル基を表す。Ｒ６〜Ｒ１０の少なくとも１つは−ＣＨ＝ＣＨ２基又は−Ｃ（ＣＨ３）＝ＣＨ２基を含む。）
上記応性有機リン系難燃剤（Ｂ）は、エネルギー的に安定したものであり、樹脂への混練・成形時に、気化しにくく、更には、熱や剪断によって分解され難いので、成形加工性を損なうこともない。 (In the formula (II), at least one P—C bond is contained in one molecule, and Ar 1 and Ar 2 are each a bifunctional aromatic hydrocarbon group containing no mobile hydrogen having 20 or less carbon atoms. N is an integer of 0 to 2. R 6 to R 10 are —NHCH 2 CH═CH 2 , —N (CH 2 CH═CH 2 ) 2 , —OCH 2 CH═CH 2 , — CH 2 CH = CH 2, -CH 2 CH 2 OCH = CH 2, - (C 6 H 4) -CH = CH 2, -O (C 6 H 4) -CH = CH 2, -CH 2 (C 6 H 4) -CH = CH 2, -NH (C 6 H 4) -CH = CH 2, -N (CH 2 CH = CH 2) - (C 6 H 4) -CH = CH 2, -O-R A group selected from —OOC—C (R ′) ═CH 2 , —NH—R—NHCO—C (R ′) ═CH 2 and an aryl group having 12 or less carbon atoms; Here, R represents an alkylene group having 2 to 5 carbon atoms, R ′ represents hydrogen or a methyl group, and at least one of R 6 to R 10 is —CH═CH 2 group or —C (CH 3 ) ═. Including CH 2 groups)
The responsive organophosphorous flame retardant (B) is stable in terms of energy, hardly vaporizes during kneading and molding into a resin, and further difficult to be decomposed by heat or shearing, thus impairing molding processability. There is nothing.

また、本発明の消弧用樹脂加工品は、前記ポリアセタール系樹脂（Ｃ）が、オキシメチレン−オキシエチレン共重合体又はオキシメチレン重合体であることが好ましい。この態様によれば、消弧性に優れた熱分解ガスを発生できるので、アークを速やかに消弧することができ、アーク電圧が損なわれにくい。   In the arc extinguishing resin processed product of the present invention, the polyacetal resin (C) is preferably an oxymethylene-oxyethylene copolymer or an oxymethylene polymer. According to this aspect, since the pyrolysis gas excellent in arc extinguishing properties can be generated, the arc can be extinguished quickly and the arc voltage is not easily lost.

また、本発明の消弧用樹脂加工品は、前記ポリオレフィン樹脂（Ａ）中に前記ポリアセタール系樹脂（Ｃ）が分散し、ミクロ相分離構造を形成していることが好ましい。この態様によれば、消弧用樹脂加工品が熱分解される際、ポリアセタール系樹脂（Ｃ）が熱分解されやすいので、消弧性の高い熱分解ガスを放出でき、アークを速やかに消弧できる。   In the arc extinguishing resin processed product of the present invention, it is preferable that the polyacetal resin (C) is dispersed in the polyolefin resin (A) to form a microphase separation structure. According to this aspect, when the arc extinguishing resin processed product is pyrolyzed, the polyacetal-based resin (C) is easily pyrolyzed, so that it is possible to release a pyrolysis gas having high arc extinguishing properties, and to extinguish the arc quickly. it can.

一方、本発明の回路遮断器は、固定接点を有する固定接触子と、前記固定接触子と接触する可動接点を有し前記固定接触子に対して開閉動作をする可動接触子と、前記固定接触子と前記可動接触子とが開閉動作する際に発生するアークを消弧する消弧装置とを備えた回路遮断器において、前記消弧装置が、上記消弧用樹脂加工品からなることを特徴とする。上記本発明の回路遮断器によれば、電流遮断時に接点から発生するアークを効率よく消弧でき、かつ、消弧装置内の内圧上昇を抑えることができる。このため、小型化で、過負荷遮断や短絡遮断など遮断性能の優れた回路遮断器とすることができる。   Meanwhile, the circuit breaker of the present invention includes a fixed contact having a fixed contact, a movable contact having a movable contact that contacts the fixed contact, and opening and closing the fixed contact, and the fixed contact. In a circuit breaker comprising an arc extinguishing device that extinguishes an arc generated when a child and the movable contact are opened and closed, the arc extinguishing device is made of the arc extinguishing resin processed product. And According to the circuit breaker of the present invention, it is possible to effectively extinguish an arc generated from the contact when the current is interrupted, and to suppress an increase in internal pressure in the arc extinguishing device. For this reason, it can be set as a circuit breaker excellent in interruption | blocking performance, such as overload interruption | blocking and short circuit interruption | blocking, by size reduction.

本発明の消弧用樹脂加工品は、強度、耐圧性、耐熱性、難燃性、成形加工性に優れるものであると共に、消弧作用の高い熱分解ガスを発生するので、電流遮断時に接点から発生するアークを効率よく消弧でき、消弧装置内の内圧上昇を抑えることができる。このため、この消弧用樹脂加工品を用いた本発明の回路遮断機は、小型化でき、過負荷遮断や短絡遮断など遮断性能の優れたものとすることができる。   The arc extinguishing resin processed product of the present invention is excellent in strength, pressure resistance, heat resistance, flame retardancy, and molding processability, and generates a pyrolytic gas having a high arc extinguishing action. The arc generated from the arc can be extinguished efficiently, and an increase in internal pressure in the arc extinguishing device can be suppressed. For this reason, the circuit breaker of the present invention using this arc-extinguishing resin processed product can be miniaturized and can have excellent interruption performance such as overload interruption and short-circuit interruption.

本発明の消弧用樹脂加工品は、メチレン鎖の水素原子の一部が水酸基で置換され、メチレン基（−ＣＨ２−）１モルに対して、水酸基（−ＯＨ）を０．２〜０．７モル含有するポリオレフィン樹脂（Ａ）と、末端不飽和結合を有する反応性有機リン系難燃剤（Ｂ）とを含む樹脂組成物を、成形後に放射線架橋を施して得られたものである。 In the arc extinguishing resin processed product of the present invention, part of the hydrogen atoms of the methylene chain is substituted with a hydroxyl group, and the hydroxyl group (—OH) is 0.2 to 0 with respect to 1 mol of the methylene group (—CH 2 —). The resin composition containing 0.7 mol of the polyolefin resin (A) and the reactive organophosphorus flame retardant (B) having a terminal unsaturated bond was obtained by subjecting the resin composition to radiation crosslinking after molding.

上記ポリオレフィン樹脂（Ａ）は、メチレン基１モルに対して、水酸基を０．２〜０．７モル含有するものであり、メチレン基１モルに対して、水酸基を０．２〜０．６５モル含有することが好ましい。水酸基が上記割合で０．２未満であると、熱分解時に消弧性に優れた熱分解ガスが発生しにくく、アークを速やかに消弧できないばかりか、アーク消弧時に消弧装置内の内圧が大きくなる傾向にある。また、水酸基が上記割合で０．７を超えると、耐熱性が低下し、更には、熱分解温度が低下して溶融混練による成形加工が困難となる傾向にある。   The polyolefin resin (A) contains 0.2 to 0.7 mol of hydroxyl group per mol of methylene group, and 0.2 to 0.65 mol of hydroxyl group per mol of methylene group. It is preferable to contain. When the hydroxyl group is less than 0.2 in the above ratio, it is difficult to generate a pyrolysis gas excellent in arc extinguishing property during pyrolysis, and not only the arc cannot be extinguished quickly but also the internal pressure in the arc extinguishing device during arc extinguishing Tend to be larger. On the other hand, when the hydroxyl group exceeds 0.7 in the above ratio, the heat resistance is lowered, and further, the thermal decomposition temperature is lowered and the molding process by melt kneading tends to be difficult.

また、上記ポリオレフィン樹脂（Ａ）は、分解潜熱が３０ｃａｌ／g以上であることが好ましく、４０ｃａｌ／g以上がより好ましい。ここで、ポリオレフィン樹脂（Ａ）の分解潜熱を向上させるには、水酸基の含有量を増加させればよく、例えば、メチレン鎖の水素原子の一部が水酸基で置換された、メチレン基１モルに対して、水酸基を０．２〜０．７モル含有するポリオレフィン樹脂は、分解潜熱が３０〜５０ｃａｌ／gである。なお、樹脂の分解潜熱は、不活性雰囲気下にて、測定対象物の樹脂を加熱分解することで測定することができる。   The polyolefin resin (A) preferably has a decomposition latent heat of 30 cal / g or more, and more preferably 40 cal / g or more. Here, in order to improve the decomposition latent heat of the polyolefin resin (A), the content of the hydroxyl group may be increased. For example, in one mole of methylene group in which a part of the hydrogen atoms of the methylene chain is substituted with a hydroxyl group. On the other hand, the polyolefin resin containing 0.2 to 0.7 mol of hydroxyl group has a latent heat of decomposition of 30 to 50 cal / g. The latent heat of decomposition of the resin can be measured by thermally decomposing the resin to be measured in an inert atmosphere.

このようなポリオレフィン樹脂としては、エチレン−ビニルアルコール共重合体が好ましく、消弧性が優れるという理由から、エチレン−ビニルアルコール共重合体が特に好ましい。ただし、ポリエチレンでは消弧性が乏しく、また、ポリビニルアルコールでは成形加工方法が限定されてしまう。   As such a polyolefin resin, an ethylene-vinyl alcohol copolymer is preferable, and an ethylene-vinyl alcohol copolymer is particularly preferable because of excellent arc extinguishing properties. However, polyethylene has poor arc-extinguishing properties, and polyvinyl alcohol limits the molding method.

また、上記反応性有機リン系難燃剤（Ｂ）は、末端不飽和結合を有する有機リン化合物であり、下記式（Ｉ）及び下記式（ＩＩ）に示される有機リン化合物が好ましい。   Moreover, the said reactive organophosphorus flame retardant (B) is an organophosphorus compound which has a terminal unsaturated bond, and the organophosphorus compound shown by following formula (I) and following formula (II) is preferable.

（式（Ｉ）中、Ｒ１〜Ｒ４はそれぞれＣＨ２＝ＣＹ１−Ｙ２−、又はヘテロ原子を含んでもよい一官能性の芳香族炭化水素系基を表し、Ｒ５はヘテロ原子を含んでもよい二官能性の芳香族炭化水素系基を表す。Ｘ１〜Ｘ４はそれぞれ−Ｏ−、−ＮＨ−、−（ＣＨ２＝ＣＹ１−Ｙ２）Ｎ−より選択される基を表し、Ｘ１〜Ｘ４の少なくとも１つは−ＮＨ−、又は−（ＣＨ２＝ＣＹ１−Ｙ２）Ｎ−を含む。Ｒ１〜Ｒ４及びＸ１〜Ｘ4の少なくとも１つはＣＨ２＝ＣＹ１−Ｙ２−を含む。Ｙ１は水素又はメチル基を表し、Ｙ２は炭素数１〜５のアルキレン基、又は−ＣＯＯ−Ｙ３−を表す。ここで、Ｙ３は炭素数１〜５のアルキレン基を表す。） (In formula (I), R 1 to R 4 each represents CH 2 ═CY 1 —Y 2 — or a monofunctional aromatic hydrocarbon group that may contain a hetero atom, and R 5 represents a hetero atom. X 1 to X 4 each represents a group selected from —O—, —NH—, and — (CH 2 ═CY 1 —Y 2 ) N—. And at least one of X 1 to X 4 contains —NH— or — (CH 2 ═CY 1 —Y 2 ) N—, wherein at least one of R 1 to R 4 and X 1 to X 4 is CH. 2 = CY 1 -Y 2 -is included, Y 1 represents hydrogen or a methyl group, Y 2 represents an alkylene group having 1 to 5 carbon atoms, or —COO—Y 3 —, where Y 3 represents carbon. Represents an alkylene group of formula 1-5.)

（式（ＩＩ）中、１分子中に少なくとも１つのＰ−Ｃ結合を含み、Ａｒ1及びＡｒ２は、それぞれ炭素数２０以下の易動性水素を含まない二官能性の芳香族炭化水素系基を表し、ｎは０〜２の整数である。Ｒ６〜Ｒ１０はそれぞれ、−ＮＨＣＨ２ＣＨ=ＣＨ２、−Ｎ(ＣＨ２ＣＨ＝ＣＨ２)２、−ＯＣＨ２ＣＨ＝ＣＨ２、−ＣＨ２ＣＨ＝ＣＨ２、−ＣＨ２ＣＨ２ＯＣＨ＝ＣＨ２、−(Ｃ６Ｈ４)−ＣＨ＝ＣＨ２、−Ｏ(Ｃ６Ｈ４)−ＣＨ＝ＣＨ２、−ＣＨ２(Ｃ６Ｈ４)−ＣＨ＝ＣＨ２、−ＮＨ(Ｃ６Ｈ４)−ＣＨ＝ＣＨ２、−Ｎ(ＣＨ２ＣＨ＝ＣＨ２)−(Ｃ６Ｈ４)−ＣＨ＝ＣＨ２、−Ｏ−Ｒ−ＯＯＣ−Ｃ(Ｒ’)＝ＣＨ２、−ＮＨ−Ｒ−ＮＨＣＯ−Ｃ(Ｒ’)＝ＣＨ２、炭素数１２以下のアリール基より選択される基を表す。ここで、Ｒは炭素数２〜５のアルキレン基、Ｒ’は水素またはメチル基を表す。Ｒ６〜Ｒ１０の少なくとも１つは−ＣＨ＝ＣＨ２基又は−Ｃ（ＣＨ３）＝ＣＨ２基を含む。）
すなわち、上記の有機リン化合物は、末端不飽和結合である−ＣＨ＝ＣＨ２基又は−Ｃ（ＣＨ３）＝ＣＨ２基を少なくとも一つ以上含む化合物である。この官能基は、放射線の照射によって、上記ポリオレフィン樹脂（Ａ）と結合するための官能基である。なお、末端不飽和結合は１分子中に２つ以上有していることが好ましい。 (In the formula (II), a bifunctional aromatic hydrocarbon system containing at least one P—C bond in one molecule, and Ar 1 and Ar 2 each containing no mobile hydrogen having 20 or less carbon atoms Represents a group, and n is an integer of 0 to 2. R 6 to R 10 are —NHCH 2 CH═CH 2 , —N (CH 2 CH═CH 2 ) 2 , —OCH 2 CH═CH 2 , respectively. -CH 2 CH = CH 2, -CH 2 CH 2 OCH = CH 2, - (C 6 H 4) -CH = CH 2, -O (C 6 H 4) -CH = CH 2, -CH 2 (C 6 H 4) -CH = CH 2 , -NH (C 6 H 4) -CH = CH 2, -N (CH 2 CH = CH 2) - (C 6 H 4) -CH = CH 2, -O- R—OOC—C (R ′) ═CH 2 , —NH—R—NHCO—C (R ′) ═CH 2 , a group selected from aryl groups having 12 or less carbon atoms Here, R represents an alkylene group having 2 to 5 carbon atoms, R ′ represents hydrogen or a methyl group, and at least one of R 6 to R 10 is —CH═CH 2 group or —C (CH 3 ). = CH 2 group included.)
That is, the organic phosphorus compound is a compound including at least one —CH═CH 2 group or —C (CH 3 ) ═CH 2 group which is a terminal unsaturated bond. This functional group is a functional group for bonding to the polyolefin resin (A) by irradiation with radiation. In addition, it is preferable to have two or more terminal unsaturated bonds in one molecule.

式（Ｉ）で示される化合物において、ＣＨ２＝ＣＹ１−Ｙ２−基としては、具体的には、ＣＨ２＝ＣＨ−ＣＨ２−、ＣＨ２＝ＣＨ−ＣＨ２ＣＨ２ＣＨ２−、ＣＨ２＝Ｃ（ＣＨ３）−ＣＨ２−、ＣＨ２＝ＣＨＣＯＯ−ＣＨ２ＣＨ２−、ＣＨ２＝Ｃ（ＣＨ３）ＣＯＯ−ＣＨ２ＣＨ２−などが挙げられる。 In the compound represented by the formula (I), the CH 2 ═CY 1 —Y 2 — group specifically includes CH 2 ═CH—CH 2 —, CH 2 ═CH—CH 2 CH 2 CH 2 —, CH 2 = C (CH 3) -CH 2 -, CH 2 = CHCOO-CH 2 CH 2 -, CH 2 = C (CH 3) COO-CH 2 CH 2 - and the like.

また、Ｒ１〜Ｒ４のヘテロ原子を含んでもよい一官能性の芳香族炭化水素系基としては、炭素数が６〜１４の芳香族炭化水素系基が好ましい。具体的には、−Ｃ６Ｈ５（フェニル基）、−Ｃ６Ｈ５ＯＨ（ヒドロキシフェニル基）、−Ｃ６Ｈ５−Ｃ６Ｈ５ＯＨ（ヒドロキシビフェニル基）、−ＣＨ２Ｃ６Ｈ５（ベンジル基）、−α-Ｃ１０Ｈ７（α-ナフチル基）、−β-Ｃ１０Ｈ７（β-ナフチル基）などが挙げられる。 The aromatic hydrocarbon-based group R 1 to R 4 in or monofunctional also contain a hetero atom, preferably an aromatic hydrocarbon group having 6 to 14 carbon atoms. Specifically, -C 6 H 5 (phenyl group), - C 6 H 5 OH ( hydroxyphenyl group), - C 6 H 5 -C 6 H 5 OH ( hydroxybiphenyl group), - CH 2 C 6 H 5 (benzyl group), -α-C 10 H 7 (α-naphthyl group), -β-C 10 H 7 (β-naphthyl group) and the like.

また、Ｒ５のヘテロ原子を含んでもよい二官能性の芳香族炭化水素系基としては、炭素数が１０〜１４の芳香族炭化水素系基が好ましい。具体的には、−ｐ-Ｃ６Ｈ４−p-Ｃ６Ｈ４−、−p-Ｃ６Ｈ４−ＣＨ２−p-Ｃ６Ｈ４−、−p-Ｃ６Ｈ４−Ｃ（ＣＨ３）２−p-Ｃ６Ｈ４−、−p-Ｃ６Ｈ４−Ｃ（＝Ｏ）−p-Ｃ６Ｈ４−、−p-Ｃ６Ｈ４−ＳＯ２−p-Ｃ６Ｈ４−、２，６−Ｃ１０Ｈ６＜（２，６−ナフチレン基）などが挙げられる。 The aromatic hydrocarbon group which may bifunctional contain heteroatoms R 5, preferably an aromatic hydrocarbon group having a carbon number of 10 to 14. Specifically, -p-C 6 H 4 -p -C 6 H 4 -, - p-C 6 H 4 -CH 2 -p-C 6 H 4 -, - p-C 6 H 4 -C ( CH 3) 2 -p-C 6 H 4 -, - p-C 6 H 4 -C (= O) -p-C 6 H 4 -, - p-C 6 H 4 -SO 2 -p-C 6 H 4 -, 2,6-C 10 H 6 <(2,6- naphthylene group).

なお、本発明において芳香族炭化水素系基とは、例えば上記のフェニル基や−p-Ｃ６Ｈ４−p-Ｃ６Ｈ４−のような芳香族炭化水素基のみならず、例えば上記のヒドロキシフェニル基や−p-Ｃ６Ｈ４−ＳＯ２−p-Ｃ６Ｈ４−のような、芳香族炭化水素基に加えて更に酸素や硫黄などのヘテロ原子を含んだ基も含むこととする。 Note that the aromatic hydrocarbon group in the present invention, for example, a phenyl group or -p-C 6 H 4 -p- C 6 H 4 above - not only aromatic hydrocarbon groups such as, for example, the above hydroxyphenyl group or -p-C 6 H 4 -SO 2 -p-C 6 H 4 - like, and also include groups containing heteroatoms such as more oxygen or sulfur in addition to an aromatic hydrocarbon radical To do.

そして、上記式（Ｉ）の有機リン化合物としては、例えば、下記の構造式（Ｉ−１）〜（Ｉ−１８）で示される化合物が挙げられる。   And as an organophosphorus compound of the said formula (I), the compound shown by following structural formula (I-1)-(I-18) is mentioned, for example.

上記の化合物は、国際公開ＷＯ２００５／０１２４１５号パンフレットなどに記載された方法によって合成できる。例えば、上記（Ｉ−１）の化合物は、ジメチルアセトアミド（ＤＭＡｃ）にオキシ塩化リンを加え、この溶液に、４,４’−ビフェニルアルコールとトリエチルアミンを溶解したＤＭＡｃの溶液を滴下して反応させ、次いで、アリルアミンとトリエチルアミンとの混合液を反応させることにより得ることができる。   Said compound is compoundable by the method described in international publication WO2005 / 012415 pamphlet etc. For example, the compound of (I-1) is reacted by adding dropwise a solution of DMAc in which 4,4′-biphenyl alcohol and triethylamine are dissolved, to this solution, adding phosphorus oxychloride to dimethylacetamide (DMAc). Subsequently, it can obtain by making the liquid mixture of an allylamine and a triethylamine react.

また、式（ＩＩ）で示される化合物において、炭素数１２以下のアリール基としては、例えば、−Ｃ６Ｈ５（フェニル基）、−Ｃ６Ｈ５ＯＨ（ヒドロキシフェニル基）、−Ｃ６Ｈ５−Ｃ６Ｈ５ＯＨ（ヒドロキシビフェニル基）、−α-Ｃ１０Ｈ７（α-ナフチル基）、−β-Ｃ１０Ｈ７（β-ナフチル基）などが挙げられる。 In the compound represented by the formula (II), examples of the aryl group having 12 or less carbon atoms include —C 6 H 5 (phenyl group), —C 6 H 5 OH (hydroxyphenyl group), and —C 6 H. 5- C 6 H 5 OH (hydroxybiphenyl group), -α-C 10 H 7 (α-naphthyl group), -β-C 10 H 7 (β-naphthyl group) and the like can be mentioned.

また、Ａｒ1及びＡｒ２の炭素数２０以下の易動性水素を含まない二官能性芳香族炭化水素系基としては、例えば、−p-Ｃ６Ｈ４−、−p-Ｃ６Ｈ４−Ｏ−、−Ｏ−p-Ｃ６Ｈ４−Ｏ−、−p-Ｃ６Ｈ４−p-Ｃ６Ｈ４−、−p-Ｃ６Ｈ４−ＣＨ２−p-Ｃ６Ｈ４−、−p-Ｃ６Ｈ４−Ｃ（ＣＨ３）２−p-Ｃ６Ｈ４−、−p-Ｃ６Ｈ４−Ｃ（＝Ｏ）−p-Ｃ６Ｈ４−、−p-Ｃ６Ｈ４−ＳＯ２−p-Ｃ６Ｈ４−、２，６−Ｃ１０Ｈ６＜（２，６−ナフチレン基）などが挙げられる。ここで、易動性水素としては、−ＯＨ(水酸基)、−ＮＨＣＯ−（アミド結合）、−ＮＨＣＯＯ−（ウレタン結合）などの、水素結合を形成しやすく、金属ナトリウムや水素化ナトリウムなどと常温で容易に反応して水素を発生する官能基に含まれる反応性の高い水素を意味する。 In addition, examples of the bifunctional aromatic hydrocarbon group that does not include the mobile hydrogen having 20 or less carbon atoms of Ar 1 and Ar 2 include -p-C 6 H 4 -and -p-C 6 H 4. -O -, - O-p- C 6 H 4 -O -, - p-C 6 H 4 -p-C 6 H 4 -, - p-C 6 H 4 -CH 2 -p-C 6 H 4 -, - p-C 6 H 4 -C (CH 3) 2 -p-C 6 H 4 -, - p-C 6 H 4 -C (= O) -p-C 6 H 4 -, - p- C 6 H 4 —SO 2 —p—C 6 H 4 —, 2,6-C 10 H 6 <(2,6-naphthylene group) and the like can be mentioned. Here, as mobile hydrogen, it is easy to form hydrogen bonds such as —OH (hydroxyl group), —NHCO— (amide bond), —NHCOO— (urethane bond), etc. It means highly reactive hydrogen contained in a functional group that easily reacts to generate hydrogen.

そして、上記式（ＩＩ）の有機リン化合物としては、例えば、下記の構造式（ＩＩ−１）〜（ＩＩ−２３）で示される化合物が挙げられる。このうち、（ＩＩ−１〜ＩＩ−１２）はｎがゼロ、すなわち１分子中のリン原子が２個の場合の例である。また、（ＩＩ−１３〜ＩＩ−２０）はｎが１、すなわち、１分子中のリン原子が３個の場合の例である。また、（ＩＩ−２１）〜（ＩＩ−２３）はｎが２、すなわち、１分子中のリン原子が４個の場合の例である。   And as an organophosphorus compound of the said formula (II), the compound shown by following structural formula (II-1)-(II-23) is mentioned, for example. Among these, (II-1 to II-12) are examples in which n is zero, that is, there are two phosphorus atoms in one molecule. Further, (II-13 to II-20) is an example in which n is 1, that is, three phosphorus atoms in one molecule. Further, (II-21) to (II-23) are examples in which n is 2, that is, four phosphorus atoms in one molecule.

上記の化合物は、国際公開ＷＯ２００５／０８７８５２号パンフレットなどに記載された方法によって合成できる。例えば、上記（ＩＩ−１）の化合物は、４,４’−ジクロルビフェニルを出発原料とし、これをオキシ塩化リンと反応させた後、更に臭化アリルと反応させて末端に不飽和基を導入することによって合成することができる。   Said compound is compoundable by the method described in international publication WO2005 / 087852 pamphlet etc. For example, the compound of (II-1) above uses 4,4′-dichlorobiphenyl as a starting material, reacts this with phosphorus oxychloride, and further reacts with allyl bromide to form an unsaturated group at the end. It can synthesize | combine by introduce | transducing.

そして、上記反応性有機リン系難燃剤（Ｂ）は、樹脂組成物中に０．５〜２０質量％含有することが好ましく、４〜１２質量％がより好ましい。上記反応性有機リン系難燃剤（Ｂ）の含有量が０．５質量％未満であると、難燃性をほとんど向上することができず、更には樹脂組成物の架橋密度が劣ることから、強度、耐圧性、耐熱性などの物理的特性をほとんど向上させることができない。２０質量％を超えると、反応性有機リン系難燃剤が過剰となり、反応性有機リン系難燃剤の未反応のモノマーや分解ガスが発生したり、オリゴマー化したものがブリードアウトする虞れがある。   And it is preferable to contain 0.5-20 mass% of the said reactive organophosphorus flame retardant (B) in a resin composition, and 4-12 mass% is more preferable. If the content of the reactive organophosphorus flame retardant (B) is less than 0.5% by mass, the flame retardancy can hardly be improved, and further the crosslinking density of the resin composition is inferior, Physical properties such as strength, pressure resistance and heat resistance can hardly be improved. When the amount exceeds 20% by mass, the reactive organophosphorus flame retardant becomes excessive, and there is a possibility that unreacted monomer and decomposition gas of the reactive organophosphorus flame retardant may be generated or oligomerized bleed out. .

本発明の消弧用樹脂加工品に用いられる上記樹脂組成物は、更に、ポリアセタール系樹脂（Ｃ）を含有することが好ましい。ポリアセタール系樹脂は、消弧作用の高い熱分解ガスを発生できるものの、溶融混練での成形が困難であることから成形加工性に劣り、また、熱分解ガスの発生量が高く、更には、該熱分解ガスは内圧上昇への寄与が比較的高いものであることから、消弧装置内の内圧が上昇しやすい。上記ポリアセタール系樹脂と上記ポリオレフィン樹脂（Ａ）とを併用することで、樹脂組成物の成形加工性が損なわれることなく消弧性を向上でき、更には、アーク消弧時における消弧装置内の内圧上昇を抑制できる。   It is preferable that the resin composition used for the arc extinguishing resin processed product of the present invention further contains a polyacetal resin (C). Polyacetal-based resins can generate pyrolysis gas with high arc extinguishing action, but are inferior in molding processability due to difficulty in molding by melt-kneading, and the generation amount of pyrolysis gas is high. Since pyrolysis gas has a relatively high contribution to the increase in internal pressure, the internal pressure in the arc extinguishing device tends to increase. By using the polyacetal-based resin and the polyolefin resin (A) in combination, the arc extinguishing performance can be improved without impairing the molding processability of the resin composition, and further, in the arc extinguishing apparatus during arc extinguishing An increase in internal pressure can be suppressed.

上記ポリアセタール系樹脂（Ｃ）は、オキシメチレンから誘導される繰り返し単位の含有量が７５〜１００モル％であることが好ましく、８０〜１００モル％であることがより好ましい。上記繰り返し単位の含有量が７５モル％未満であると、消弧性が劣り、アークを速やかに消弧できない。   In the polyacetal resin (C), the content of repeating units derived from oxymethylene is preferably 75 to 100 mol%, and more preferably 80 to 100 mol%. When the content of the repeating unit is less than 75 mol%, the arc extinguishing property is inferior and the arc cannot be extinguished quickly.

このようなポリアセタール系樹脂としては、オキシメチレン−オキシエチレン共重合体又はオキシメチレン重合体が好ましく、消弧性が優れるという理由から、オキシメチレン−オキシエチレン共重合体又はオキシメチレン重合体が特に好ましい。ただし、ポリオキシエチレンでは消弧性に乏しい。   As such a polyacetal resin, an oxymethylene-oxyethylene copolymer or an oxymethylene polymer is preferable, and an oxymethylene-oxyethylene copolymer or an oxymethylene polymer is particularly preferable because of excellent arc extinguishing properties. . However, polyoxyethylene has poor arc-extinguishing properties.

そして、ポリアセタール系樹脂（Ｃ）の含有量は、ポリオレフィン樹脂（Ａ）１００質量部に対して５〜９０質量部であることが好ましく、７〜８８質量部がより好ましい。ポリアセタール系樹脂（Ｃ）の含有量が上記割合で５質量部未満であると、ポリアセタール系樹脂（Ｃ）による効果が乏しく、消弧性をほとんど向上できず、９０質量部を超えると、熱分解ガスの発生量が増加し、消弧装置内の内圧が上昇する傾向にある。   And it is preferable that content of polyacetal type-resin (C) is 5-90 mass parts with respect to 100 mass parts of polyolefin resin (A), and 7-88 mass parts is more preferable. When the content of the polyacetal-based resin (C) is less than 5 parts by mass in the above proportion, the effect of the polyacetal-based resin (C) is poor, and the arc-extinguishing property can hardly be improved. The amount of gas generated increases and the internal pressure in the arc extinguishing device tends to increase.

また、本発明の消弧用樹脂加工品に用いられる上記樹脂組成物は汎用性熱可塑性樹脂などの上記樹脂以外の樹脂を更に含有してもよい。これらの樹脂の含有量は、上記ポリオレフィン樹脂（Ａ）１００質量部に対して０〜１５質量部が好ましく、０〜１２質量部がより好ましい。   The resin composition used in the arc extinguishing resin processed product of the present invention may further contain a resin other than the resin such as a general-purpose thermoplastic resin. 0-15 mass parts is preferable with respect to 100 mass parts of said polyolefin resin (A), and, as for content of these resin, 0-12 mass parts is more preferable.

また、本発明の消弧用樹脂加工品に用いられる上記樹脂組成物は、更に放射線架橋剤を含有することが好ましい。放射線架橋剤を含有することで、放射線照射によって放射線架橋剤と樹脂との結合によって、樹脂が３次元網目構造に架橋できるので、架橋密度が密となり、強度、耐圧性、耐熱性などの物理的特性が向上する。   Moreover, it is preferable that the said resin composition used for the arc extinguishing resin processed article of this invention contains a radiation crosslinking agent further. By containing a radiation cross-linking agent, the resin can be cross-linked into a three-dimensional network structure due to the bond between the radiation cross-linking agent and the resin by irradiation, so that the cross-linking density becomes dense and physical strength, pressure resistance, heat resistance, etc. Improved characteristics.

このような放射線架橋剤としては、芳香族環を有せず、かつ水素ガスを発生し易い、メラミン系のトリメタリルアクリレート及びトリアリルアクリレート、イソシアネートトリ（メチル）アクリレートなどの、２官能以上の反応性官能基を有する化合物が挙げられる。具体的には、トリアリルイソシアヌレート、トリメタリルイソシアヌレート及びそれらをラジカルオリゴメリゼーションして得られたオリゴマー、トリメリット酸トリアリル、トリメリット酸トリメタリルエステル、ピロメリット酸テトラアリル、ピロメリット酸テトラメタリルエステル、Ｎ，Ｎ，Ｎ’，Ｎ’，Ｎ”，Ｎ”‐ヘキサアリルメラミン、Ｎ，Ｎ，Ｎ’，Ｎ’，Ｎ”，Ｎ”‐ヘキサメタリルメラミンなどが挙げられる。   As such a radiation cross-linking agent, a bifunctional or higher functional reaction such as melamine-based trimethallyl acrylate and triallyl acrylate, isocyanate tri (methyl) acrylate, which does not have an aromatic ring and easily generates hydrogen gas. A compound having a functional group. Specifically, triallyl isocyanurate, trimethallyl isocyanurate and oligomers obtained by radical oligomerization thereof, triallyl trimellitic acid, trimellitic acid trimethallyl ester, pyromellitic acid tetraallyl, pyromellitic acid tetrametall For example, N-N, N, N ′, N ′, N ″, N ″ -hexaallyl melamine, N, N, N ′, N ′, N ″, N ″ -hexamethallyl melamine and the like.

そして、上記放射線架橋剤は、樹脂組成物中に０．５〜２０質量％含有することが好ましく、１〜１２質量％がより好ましい。上記放射線架橋剤の含有量が０．５質量％未満であると、樹脂組成物の架橋性をほとんど向上させることができず、２０質量％を超えると、放射線架橋剤によるブリードアウトが生じる虞れがある。   And it is preferable to contain 0.5-20 mass% of said radiation crosslinking agents in a resin composition, and 1-12 mass% is more preferable. If the content of the radiation crosslinking agent is less than 0.5% by mass, the crosslinkability of the resin composition can hardly be improved. If the content exceeds 20% by mass, bleeding out due to the radiation crosslinking agent may occur. There is.

また、本発明の消弧用樹脂加工品に用いられる上記樹脂組成物は、強化繊維、チタン酸バリウムウィスカー、シリカゲル微粒子、ベーマイト、タルク、炭酸マグネシウム及び金属水酸化物から選ばれた１種以上の無機フィラー（Ｄ）を含有することが好ましい。無機フィラーを含有することによって、消弧用樹脂加工品の強度、耐圧性及び耐熱性が向上するとともに、寸法安定性を向上させることができる。   The resin composition used in the arc extinguishing resin processed product of the present invention is at least one selected from reinforcing fibers, barium titanate whiskers, silica gel fine particles, boehmite, talc, magnesium carbonate and metal hydroxide. It is preferable to contain an inorganic filler (D). By containing the inorganic filler, the strength, pressure resistance and heat resistance of the arc extinguishing resin processed product can be improved, and the dimensional stability can be improved.

例えば、上記強化繊維としては、ガラス繊維、炭素繊維、金属繊維が挙げられ、強度、及び樹脂や無機充填材との密着性の点からガラス繊維を用いることが好ましい。これらの強化繊維は、単独でも、２種以上を併用して用いてもよく、また、シランカップリング剤などの公知の表面処理剤で処理されたものでもよい。また、ガラス繊維は、表面処理されており、更に樹脂で被覆されていることが好ましい。これにより、樹脂との密着性を更に向上することができる。   For example, examples of the reinforcing fiber include glass fiber, carbon fiber, and metal fiber, and it is preferable to use glass fiber from the viewpoint of strength and adhesiveness with a resin or an inorganic filler. These reinforcing fibers may be used alone or in combination of two or more thereof, and may be treated with a known surface treatment agent such as a silane coupling agent. The glass fiber is preferably surface-treated and further coated with a resin. Thereby, adhesiveness with resin can further be improved.

また、上記金属水酸化物としては、粒径が１〜１０μｍであれば樹脂との分散性の向上が挙げられ、内圧上昇を抑制できるという理由から水酸化アルミニウム、ベーマイトおよび水酸化マグネシウムが好ましい。   Moreover, as said metal hydroxide, if a particle size is 1-10 micrometers, the improvement of a dispersibility with resin is mentioned and aluminum hydroxide, boehmite, and magnesium hydroxide are preferable from the reason that an internal pressure raise can be suppressed.

そして、上記無機フィラー（Ｄ）は、樹脂組成物中に１〜７０質量％含有することが好ましく、２０〜７０質量％がより好ましい。無機フィラー（Ｄ）の含有量が１質量％未満であると、無機フィラーによる効果がほとんど得られず、７０質量％を超えると、熱分解ガスの発生量が低減するので消弧性が劣る。   And it is preferable to contain 1-70 mass% of said inorganic fillers (D) in a resin composition, and 20-70 mass% is more preferable. When the content of the inorganic filler (D) is less than 1% by mass, the effect of the inorganic filler is hardly obtained.

また、本発明の消弧用樹脂加工品に用いられる上記樹脂組成物には、本発明の目的である耐熱性、耐圧性、消弧性、強度などの物性を著しく損わない範囲で、上記以外の常用の各種添加成分、例えば結晶核剤、着色剤、酸化防止剤、離型剤、可塑剤、熱安定剤、滑剤、紫外線防止剤などの添加剤を添加することができる。   In addition, the resin composition used in the arc extinguishing resin processed product of the present invention is within the range that does not significantly impair the physical properties such as heat resistance, pressure resistance, arc extinguishing property, and strength, which are the objects of the present invention. Various conventional additive components other than the above, such as crystal nucleating agents, colorants, antioxidants, mold release agents, plasticizers, heat stabilizers, lubricants, and UV inhibitors can be added.

本発明の消弧用樹脂加工品は、上記樹脂組成物を成形後に、放射線照射することで得られる。   The arc extinguishing resin processed product of the present invention can be obtained by irradiating the resin composition with radiation after molding.

樹脂組成物の成形方法は従来公知の方法が用いられ、例えば、樹脂組成物を溶融混練してペレット化した後、従来公知の射出成形、押出成形、真空成形、インフレーション成形などによって成形することができる。溶融混練は、単軸或いは二軸押出機、バンバリーミキサー、ニーダー、ミキシングロールなどの通常の溶融混練加工機を使用して行うことができる。そして、混練温度は１７０〜２３０℃で行うことが好ましい。１７０℃未満であると溶融混練が困難であり、２３０℃を越えると樹脂組成物の水酸基が解離して消弧性を低下させるからである。なかでも、本発明においては、上記ポリオレフィン樹脂（Ａ）と上記ポリアセタール系樹脂（Ｃ）とを含む樹脂組成物を不活性雰囲気下にて、１８０〜２２０℃で溶融混練した後、成形し、４０〜６０℃に冷却することが好ましい。このようにして成形することで、ポリオレフィン樹脂（Ａ）中にポリアセタール系樹脂（Ｃ）が０．１〜０．９μｍのサブミクロンオーダーで、海−島（ｓｅａ−ｉｓｌａｎｄ）状ないしヘキサゴナルシリンダー（ｈｅｘａｇｏｎａｌ ｃｙｌｉｎｄｅｒ）状ないしラメラ（ｌａｍｅｌｌａｅ）状に分散したミクロ相分離構造を有する樹脂成形品が得られる。該ミクロ相分離構造を形成させることで、ポリアセタール系樹脂（Ｃ）が熱分解されやすくなり、消弧性の高い熱分解ガスを放出できるので、アークを速やかに消弧できる。なお、この段階では全く架橋は進行していないので、成形時の余分のスプール部は、リサイクルが可能である。   Conventionally known methods are used for molding the resin composition. For example, the resin composition may be melt-kneaded and pelletized, and then molded by conventionally known injection molding, extrusion molding, vacuum molding, inflation molding, or the like. it can. The melt-kneading can be performed using a normal melt-kneading machine such as a single or twin screw extruder, a Banbury mixer, a kneader, or a mixing roll. The kneading temperature is preferably 170 to 230 ° C. When the temperature is lower than 170 ° C., melt kneading is difficult, and when the temperature exceeds 230 ° C., the hydroxyl group of the resin composition is dissociated and the arc-extinguishing property is lowered. Especially, in this invention, after melt-kneading the resin composition containing the said polyolefin resin (A) and the said polyacetal-type resin (C) at 180-220 degreeC in inert atmosphere, it shape | molds, It is preferable to cool to ~ 60 ° C. By molding in this way, the polyacetal resin (C) in the polyolefin resin (A) is in the submicron order of 0.1 to 0.9 μm, in the form of sea-island or hexagonal cylinder (hexagonal). A resin molded article having a microphase separation structure dispersed in a cylinder shape or a lamellae shape is obtained. By forming the microphase-separated structure, the polyacetal resin (C) is easily pyrolyzed and a pyrolysis gas having a high arc extinguishing property can be emitted, so that the arc can be extinguished quickly. In this stage, since the crosslinking has not progressed at all, the extra spool portion at the time of molding can be recycled.

そして、こうして得られた樹脂成形品に対し、放射線照射を施すことで、本発明の消弧用樹脂加工品とすることができる。なお、上記ミクロ相分離構造は、放射線照射による架橋反応によって、固定化できる。   And it can be set as the arc extinguishing resin processed product of this invention by irradiating the resin molded product obtained in this way with radiation. The microphase separation structure can be immobilized by a crosslinking reaction by irradiation with radiation.

樹脂成形品に照射する放射線としては、α線、γ線、Ｘ線、紫外線などが利用でき、透過性が強く照射を均一にできるという理由からγ線が好ましい。   As the radiation applied to the resin molded product, α rays, γ rays, X rays, ultraviolet rays and the like can be used, and γ rays are preferable because of its high transparency and uniform irradiation.

放射線の照射線量は１０ｋＧｙ以上であることが好ましく、１０〜４５ｋＧｙがより好ましい。この範囲であれば、架橋によって上記の物性に優れる消弧用樹脂加工品が得られる。照射線量が１０ｋＧｙ未満であると、架橋による３次元網目構造の形成が不均一となり、未反応の架橋剤がブリードアウトする可能性がある。また、４５ｋＧｙを超えると、酸化分解生成物による樹脂加工品の内部歪みが残留し、これによって変形や収縮などが発生する可能性がある。   The radiation dose is preferably 10 kGy or more, more preferably 10 to 45 kGy. If it is this range, the arc-extinguishing resin processed product which is excellent in said physical property by bridge | crosslinking will be obtained. If the irradiation dose is less than 10 kGy, the formation of a three-dimensional network structure due to cross-linking becomes non-uniform, and the unreacted cross-linking agent may bleed out. On the other hand, if it exceeds 45 kGy, the internal distortion of the resin processed product due to the oxidative decomposition product remains, which may cause deformation or shrinkage.

このようにして得られた本発明の消弧用樹脂加工品は、強度、耐圧性、耐熱性、消弧性、難燃性に優れ、回路遮断器の消弧装置として好適に用いることができる。   The arc extinguishing resin processed product of the present invention thus obtained is excellent in strength, pressure resistance, heat resistance, arc extinguishing properties, and flame retardancy, and can be suitably used as an arc extinguishing device for a circuit breaker. .

次に、本発明の回路遮断器について説明する。   Next, the circuit breaker of the present invention will be described.

本発明の回路遮断器は、固定接点を有する固定接触子と、前記固定接触子と接触する可動接点を有し前記固定接触子に対して開閉動作をする可動接触子と、前記固定接触子と前記可動接触子とが開閉動作する際に発生するアークを消弧する、上記消弧用樹脂加工品からなる消弧装置とを備えたものである。   The circuit breaker of the present invention includes a fixed contact having a fixed contact, a movable contact having a movable contact that contacts the fixed contact, and opening and closing the fixed contact, and the fixed contact. And an arc extinguishing device made of the arc extinguishing resin processed product for extinguishing an arc generated when the movable contactor opens and closes.

このような、回路遮断器の一例としては、例えば、図１〜３に示すものなどが具体例として挙げられる。図１は、回路遮断器の破断斜視図であり、図２は、消弧装置の斜視図であり、図３は、回路遮断器の断面図である。   As an example of such a circuit breaker, for example, those shown in FIGS. 1 is a cutaway perspective view of a circuit breaker, FIG. 2 is a perspective view of an arc extinguishing device, and FIG. 3 is a cross-sectional view of the circuit breaker.

図１において、電源側端子４が一体形成された固定接触子５の反対側の端部は、可動接触子１に沿うようにＵ字状に折り返され、この折り返し部５ａの先端に可動接触子１の可動接点６と接触する固定接点７が設けられている。また、固定接触子５には可動・固定接点６，７間に発生したアークを消弧装置に向かって導くアークホーン９が取り付けられている。   In FIG. 1, the opposite end portion of the fixed contact 5 with which the power supply side terminal 4 is integrally formed is folded back in a U-shape along the movable contact 1, and the movable contact at the tip of the folded portion 5a. A fixed contact 7 that contacts one movable contact 6 is provided. An arc horn 9 for guiding an arc generated between the movable and fixed contacts 6 and 7 toward the arc extinguishing device is attached to the fixed contact 5.

消弧装置は、グリット２と、消弧室１３とで構成されている。グリット２は、所定間隔で、絶縁体１２に複数枚（図では５枚）積み重ねられており、可動接触子１がグリッド２に形成されたＶ字状の切欠２ａを通して、図１に実線で示した閉成位置と鎖線で示した開離位置との間で開閉運動をするように構成されている。また、可動接触子１とグリッド２との間に、上記本発明の消弧用樹脂加工品で形成された消弧室１３が設置されている。   The arc extinguishing device includes a grit 2 and an arc extinguishing chamber 13. A plurality of grids (5 in the figure) are stacked on the insulator 12 at a predetermined interval, and the movable contact 1 is indicated by a solid line in FIG. 1 through a V-shaped notch 2a formed in the grid 2. It is configured to open and close between the closed position and the open position indicated by the chain line. Further, an arc extinguishing chamber 13 formed of the arc extinguishing resin processed product of the present invention is installed between the movable contact 1 and the grid 2.

図１及び図３において、絶縁体１２は、左右の一対の側壁１２ａと、これらを上部及び下部でそれぞれ互いに連結する連結部１２ｂ及び１２ｃとからなり、耐アーク性のメラミン系モールド樹脂により一体成形されている。左右の側壁１２ａの対向面には断面方形の条溝１４が側壁１２ａの負荷側端面（図３の右側端面）から斜めに上昇するように多段に形成されており、グリッド２は左右の側壁１２ａに跨がるようにして条溝１４に圧入されている。   1 and 3, the insulator 12 includes a pair of left and right side walls 12a and connecting portions 12b and 12c that connect the side walls 12a and 12b at the upper and lower portions, respectively, and is integrally formed by arc-resistant melamine mold resin. Has been. On the opposing surfaces of the left and right side walls 12a, a strip 14 having a square cross section is formed in multiple stages so as to rise obliquely from the load side end face (the right end face in FIG. 3) of the side wall 12a. Is press-fitted into the groove 14.

一方、消弧室１３は、左右一対の側壁１３ａと、左右の側壁１３ａの上端部間をグリッド２の切欠２ａに沿って円弧状に結ぶ前壁１３ｂとを備えている。また、消弧室１３には、消弧装置と開閉機構との間を仕切る隔壁１５と、固定接触子５の上面を覆う絶縁カバー１６とが一体形成されている。隔壁１５には、可動接触子１の開閉運動経路に沿ってスリット１５ａが設けられ、絶縁カバー１６には固定接点７を露出させる窓穴１６ａが設けられている。そして、消弧室１３は、絶縁体１２の内側に、隔壁１５が絶縁体側壁１２ａの端面に接するように図３の右側から組み合わされ、絶縁カバー１６を介して固定接触子５上に支持され、回路遮断器の図示しない本体カバーで押さえられて固定される。この状態において、消弧室１３の側壁１３ａは、可動接触子１の両側に位置するグリッド２の両脚部（切欠２ａの両側部分）を内側から覆い、また前壁１３ｂは図３に示すように、最上段のグリッド２の切欠２ａの奥部に位置する。   On the other hand, the arc extinguishing chamber 13 includes a pair of left and right side walls 13 a and a front wall 13 b that connects the upper end portions of the left and right side walls 13 a along an arc along the notch 2 a of the grid 2. In the arc extinguishing chamber 13, a partition wall 15 that partitions the arc extinguishing device and the opening / closing mechanism and an insulating cover 16 that covers the upper surface of the fixed contact 5 are integrally formed. The partition 15 is provided with a slit 15 a along the opening / closing movement path of the movable contact 1, and the insulating cover 16 is provided with a window hole 16 a for exposing the fixed contact 7. The arc extinguishing chamber 13 is combined from the right side of FIG. 3 so that the partition wall 15 is in contact with the end surface of the insulator side wall 12 a inside the insulator 12, and is supported on the fixed contact 5 via the insulating cover 16. The circuit breaker is fixed by being pressed by a body cover (not shown). In this state, the side wall 13a of the arc extinguishing chamber 13 covers both legs of the grid 2 located on both sides of the movable contact 1 (both sides of the notch 2a) from the inside, and the front wall 13b is as shown in FIG. The uppermost grid 2 is located at the back of the notch 2a.

上記構成において、電流遮断時には可動・固定接点６、７間にはアークが発生し、このアークはグリッド２に引き込まれて消弧されるが、その際、グリッド２の両脚部は消弧室１３の側壁１３ａで内側から覆われ、アークから遮蔽されるので、アークによるこの部分の溶融、飛散が防止されるとともに、アークに近接する側壁１３ａからは消弧性の高い熱分解ガスが発生し、アークの冷却が促進されて速やかに消弧する。   In the above configuration, when the current is interrupted, an arc is generated between the movable and fixed contacts 6 and 7, and this arc is drawn into the grid 2 to extinguish the arc. The side wall 13a is covered from the inside and shielded from the arc, so that this part is prevented from melting and scattering by the arc, and a highly extinguishing pyrolytic gas is generated from the side wall 13a adjacent to the arc. Arc cooling is accelerated and extinguishes quickly.

以下、実施例を用いて本発明を更に詳細に説明するが、本発明はこれらの実施例に限定されるものではない。   EXAMPLES Hereinafter, although this invention is demonstrated further in detail using an Example, this invention is not limited to these Examples.

（実施例１）
メチレン基１モルに対して、水酸基を０．５８モル含有するポリオレフィン樹脂（商品名；「ＥＶＡＬ-Ｌ１０４Ｂ」 クラレ（株）社製）６７質量部と、オキシメチレンから誘導される繰り返し単位の含有量が９０モル％であるポリオキシメチレン−オキシエチレン共重合体（商品名；「テナック−Ｃ ４５２０」 旭化成（株）社製）２５質量部とを溶融混合した後、反応性有機リン系難燃剤として上記式（Ｉ−１４）の化合物８質量部を添加し、サイドフロー型２軸押出機（日本製鋼社製）を用いて２２０℃で混練して樹脂ペレットを得た。次いで、この樹脂ペレットを、８０℃で、７時間乾燥した後、射出成形機（ＦＵＮＵＣ社製：α５０Ｃ）を用いて樹脂温度２１５℃、金型温度５０℃の条件で成形した。この成形体の断面状態をＳＥＭで観察したところ、ラメラ状態の球晶と均一な海島構造をしたミクロ相分離状態が確認できた。 (Example 1)
67 parts by mass of a polyolefin resin (trade name; “EVAL-L104B” manufactured by Kuraray Co., Ltd.) containing 0.58 mol of hydroxyl group per mol of methylene group, and the content of repeating units derived from oxymethylene As a reactive organophosphorus flame retardant, 25 parts by mass of polyoxymethylene-oxyethylene copolymer (trade name; “TENAC-C 4520” manufactured by Asahi Kasei Co., Ltd.) having a mol of 90 mol% is mixed. 8 parts by mass of the compound of the above formula (I-14) was added and kneaded at 220 ° C. using a side flow type twin screw extruder (manufactured by Nippon Steel Co., Ltd.) to obtain resin pellets. Next, the resin pellets were dried at 80 ° C. for 7 hours, and then molded using an injection molding machine (manufactured by FUNUC: α50C) under conditions of a resin temperature of 215 ° C. and a mold temperature of 50 ° C. When the cross-sectional state of the molded body was observed with an SEM, a microphase separation state having a lamella spherulite and a uniform sea-island structure could be confirmed.

その後、上記成形品に、コバルト６０を線源としたγ線を２５ｋＧｙ照射して実施例１の消弧用樹脂加工品を得た。この消弧用樹脂加工品の断面状態をＳＥＭで観察したところ、ラメラ状態の球晶と均一な海島構造をしたミクロ相分離状態が確認できた。   Thereafter, the molded product was irradiated with 25 kGy of γ rays using cobalt 60 as a radiation source to obtain an arc-extinguishing resin processed product of Example 1. When the cross-sectional state of the arc extinguishing resin processed product was observed with an SEM, a lamellar spherulite and a micro phase separation state having a uniform sea-island structure could be confirmed.

（実施例２）
メチレン基１モルに対して、水酸基を０．５８モル含有するポリオレフィン樹脂（商品名；「ＥＶＡＬ-Ｌ１０４Ｂ」 クラレ（株）社製）５０質量部と、オキシメチレンから誘導される繰り返し単位の含有量が９０モル％であるポリオキシメチレン−オキシエチレン共重合体（商品名；「テナック−Ｃ ４５２０」 旭化成（株）社製）２０質量部とを溶融混合した後、無機フィラーとして、ベーマイト（商品名；「ＢＭＴ−１０」 河合石灰工業（株）１０質量部及びシラン処理したガラスファイバー（商品名；「０３.ＪＡＦＴ２Ａｋ２５」 旭ファイバーグラス社製）１５質量部と、反応性有機リン系難燃剤として上記式（ＩＩ−３）の化合物５質量部を添加し、サイドフロー型２軸押出機（日本製鋼社製）を用いて２２０℃で混練して樹脂ペレットを得た。次いで、この樹脂ペレットを、８０℃で、７時間乾燥した後、射出成形機（ＦＵＮＵＣ社製：α５０Ｃ）を用いて樹脂温度２１５℃、金型温度５０℃の条件で成形した。この成形体の断面状態をＳＥＭで観察したところ、ラメラ状態の球晶と均一な海島構造をしたミクロ相分離状態が確認できた。 (Example 2)
50 parts by mass of a polyolefin resin (trade name; “EVAL-L104B” manufactured by Kuraray Co., Ltd.) containing 0.58 mol of hydroxyl group per mol of methylene group, and the content of repeating units derived from oxymethylene After melting and mixing 20 parts by mass of a polyoxymethylene-oxyethylene copolymer (trade name; “Tenac-C 4520”, manufactured by Asahi Kasei Co., Ltd.) with 90 mol%, boehmite (trade name) "BMT-10" 10 parts by weight of Kawai Lime Industry Co., Ltd. and 15 parts by weight of silane-treated glass fiber (trade name; "03.JAFT2Ak25" manufactured by Asahi Fiber Glass Co., Ltd.) and the above as a reactive organic phosphorus flame retardant 5 parts by mass of the compound of the formula (II-3) was added and kneaded at 220 ° C. using a side flow type twin screw extruder (manufactured by Nippon Steel Co., Ltd.). The resin pellets were then dried at 80 ° C. for 7 hours, and then molded using an injection molding machine (FUNUC: α50C) under conditions of a resin temperature of 215 ° C. and a mold temperature of 50 ° C. When the cross-sectional state of this molded body was observed with an SEM, a microphase-separated state having a lamellar spherulite and a uniform sea-island structure could be confirmed.

その後、上記成形品に、コバルト６０を線源としたγ線を２５ｋＧｙ照射して実施例２の消弧用樹脂加工品を得た。この消弧用樹脂加工品の断面状態をＳＥＭで観察したところ、ラメラ状態の球晶と均一な海島構造をしたミクロ相分離状態が確認できた。   Thereafter, the molded product was irradiated with 25 kGy of γ rays using cobalt 60 as a radiation source to obtain an arc extinguishing resin processed product of Example 2. When the cross-sectional state of the arc extinguishing resin processed product was observed with an SEM, a lamellar spherulite and a micro phase separation state having a uniform sea-island structure could be confirmed.

（実施例３）
メチレン基１モルに対して、水酸基を０．５８モル含有するポリオレフィン樹脂（商品名；「ＥＶＡＬ-Ｌ１０４Ｂ」 クラレ（株）社製）５３質量部と、オキシメチレンから誘導される繰り返し単位の含有量が９０モル％であるポリオキシメチレン−オキシエチレン共重合体（商品名；「テナック−Ｃ ４５２０」 旭化成（株）社製）２０質量部とをＮ２雰囲気下にて、２２０℃で溶融混合した。次いで、無機フィラーとしてベーマイト（商品名；「ＢＭＴ−１０」 河合石灰工業（株））１５質量部と、反応性有機リン系難燃剤として上記式（Ｉ−１８）の化合物１２質量部を添加し、Ｎ２ガス置換したサイドフロー型２軸押出機（日本製鋼社製）を用いて２２０℃で混練して樹脂ペレットを得た。そして、この樹脂ペレットを、８０℃で、７時間乾燥した後、射出成形機（ＦＵＮＵＣ社製：α５０Ｃ）を用いてＮ２雰囲気下、樹脂温度２１５℃、金型温度５０℃の条件で成形した。この成形体の断面状態をＳＥＭで観察したところ、ラメラ状態の球晶と均一な海島構造をしたミクロ相分離状態が確認できた。 (Example 3)
53 parts by mass of a polyolefin resin (trade name; “EVAL-L104B” manufactured by Kuraray Co., Ltd.) containing 0.58 mol of hydroxyl group per mol of methylene group and the content of repeating units derived from oxymethylene 20 parts by mass of a polyoxymethylene-oxyethylene copolymer (trade name: “TENAC-C 4520” manufactured by Asahi Kasei Co., Ltd.) having a N content of 90 mol% was melt mixed at 220 ° C. in an N 2 atmosphere. . Next, 15 parts by mass of boehmite (trade name; “BMT-10” Kawai Lime Industry Co., Ltd.) as an inorganic filler and 12 parts by mass of the compound of the above formula (I-18) as a reactive organic phosphorus flame retardant are added. The resin pellets were obtained by kneading at 220 ° C. using a side flow type twin screw extruder (Nippon Steel Co., Ltd.) substituted with N 2 gas. Then, the resin pellets at 80 ° C., dried 7 hours, an injection molding machine (FUNUC Co.: α50C) N 2 atmosphere using a resin temperature of 215 ° C., it was molded under the conditions of a mold temperature of 50 ° C. . When the cross-sectional state of the molded body was observed with an SEM, a microphase separation state having a lamella spherulite and a uniform sea-island structure could be confirmed.

その後、上記成形品に、コバルト６０を線源としたγ線を２５ｋＧｙ照射して実施例２の消弧用樹脂加工品を得た。この消弧用樹脂加工品の断面状態をＳＥＭで観察したところ、ラメラ状態の球晶と均一な海島構造をしたミクロ相分離状態が確認できた
（比較例１）
実施例１において、反応性有機リン系難燃剤を配合しなかった以外は、実施例１と同様の条件で混練して樹脂ペレットを得た。そして、得られた樹脂ペレットを、８０℃で、７時間乾燥した後、射出成形機（ＦＵＮＵＣ社製：α５０Ｃ）を用いて樹脂温度２１５℃、金型温度５０℃の条件で成形して、比較例１の消弧用樹脂加工品を得た。 Thereafter, the molded product was irradiated with 25 kGy of γ rays using cobalt 60 as a radiation source to obtain an arc extinguishing resin processed product of Example 2. When the cross-sectional state of the arc extinguishing resin processed product was observed with an SEM, a microphase separation state having a lamellar spherulite and a uniform sea-island structure could be confirmed (Comparative Example 1).
In Example 1, resin pellets were obtained by kneading under the same conditions as in Example 1 except that no reactive organophosphorous flame retardant was blended. The obtained resin pellets were dried at 80 ° C. for 7 hours, and then molded using an injection molding machine (FUNUC: α50C) at a resin temperature of 215 ° C. and a mold temperature of 50 ° C. for comparison. The arc extinguishing resin processed product of Example 1 was obtained.

（比較例２）
実施例２において、反応性有機リン系難燃剤を配合しなかった以外は、実施例２と同様の条件で混練して樹脂ペレットを得た。そして、得られた樹脂ペレットを、８０℃で、７時間乾燥した後、射出成形機（ＦＵＮＵＣ社製：α５０Ｃ）を用いて樹脂温度２１５℃、金型温度５０℃の条件で成形して、比較例２の消弧用樹脂加工品を得た。 (Comparative Example 2)
In Example 2, resin pellets were obtained by kneading under the same conditions as in Example 2 except that no reactive organophosphorous flame retardant was blended. The obtained resin pellets were dried at 80 ° C. for 7 hours, and then molded using an injection molding machine (FUNUC: α50C) at a resin temperature of 215 ° C. and a mold temperature of 50 ° C. for comparison. The arc extinguishing resin processed product of Example 2 was obtained.

（比較例３）
実施例２において、反応性有機リン系難燃剤の代わりに、反応性を有しない添加型の有機リン系難燃剤（商品名；「ＨＣＡ‐ＨＱ」 三光化学社製）を用いた以外は実施例２と同様にして比較例３の消弧用樹脂加工品を得た。 (Comparative Example 3)
In Example 2, instead of the reactive organophosphorus flame retardant, an additive type organophosphorus flame retardant having no reactivity (trade name: “HCA-HQ” manufactured by Sanko Chemical Co., Ltd.) was used. In the same manner as in Example 2, an arc-extinguishing resin processed product of Comparative Example 3 was obtained.

（比較例４）
実施例２において、反応性有機リン系難燃剤の代わりに、臭素系難燃剤（商品名；「Ｇｒｅａｔ Ｌａｋｅｓ ｐｄｂｓ−８０」 グレートレークス製）を用いた以外は実施例２と同様にして比較例４の消弧用樹脂加工品を得た。 (Comparative Example 4)
In Example 2, a brominated flame retardant (trade name; “Great Lakes pdbs-80” manufactured by Great Lakes) was used in place of the reactive organophosphorous flame retardant, and a comparative example was performed in the same manner as in Example 2. Four arc extinguishing resin processed products were obtained.

（比較例５）
実施例２において、メチレン基１モルに対して、水酸基を０．５８モル含有するポリオレフィン樹脂（商品名；「ＥＶＡＬ-ｌ１０４Ｂ」 クラレ（株）社製）の代わりに、ポリエチレン樹脂（商品名；「ＨＪ３６２」 日本ポリエチレン（株）社製）を用いた以外は実施例２と同様にして比較例５の消弧用樹脂加工品を得た。 (Comparative Example 5)
In Example 2, instead of a polyolefin resin (trade name; “EVAL-l104B” manufactured by Kuraray Co., Ltd.) containing 0.58 mole of hydroxyl group per mole of methylene group, a polyethylene resin (trade name; “ An arc extinguishing resin processed product of Comparative Example 5 was obtained in the same manner as in Example 2 except that “HJ362” (manufactured by Nippon Polyethylene Co., Ltd.) was used.

（比較例６）
不飽和ポリエステル樹脂（商品名；「７５２７」 ユピカ（株）社製）２５質量部と、Ａｌ（ＯＨ）３３５質量部と、スチレン−酢ビ共重合体５質量部と、重合開始剤としてt−ブチルパーオキサイド−Ｚ０．３質量部と、粘度調整剤４．７質量部とをニーダーで混練しながら、無機フィラーとしてシラン処理したガラスファイバー（商品名；「０３.ＪＡＦＴ２Ａｋ２５」 旭ファイバーグラス社製）３５質量部を添加分散し、バルクモールドコンパンドを得た。このバルクモールドコンパンドを成形し、１４０〜１５０℃にて重合反応させて、比較例６の消弧用樹脂加工品を得た。 (Comparative Example 6)
25 parts by mass of unsaturated polyester resin (trade name; “7527” manufactured by Upica Co., Ltd.), 35 parts by mass of Al (OH) 3 , 5 parts by mass of a styrene-vinyl acetate copolymer, and t as a polymerization initiator -Glass fiber (trade name: “03.JAFT2Ak25” manufactured by Asahi Fiber Glass Co., Ltd.), kneaded with 0.3 parts by mass of butyl peroxide-Z and 4.7 parts by mass of a viscosity modifier with a kneader. 35 parts by mass was added and dispersed to obtain a bulk mold compound. This bulk mold compound was molded and polymerized at 140 to 150 ° C. to obtain an arc-extinguishing resin processed product of Comparative Example 6.

（比較例７）
ナイロン６樹脂（商品名；「ＵＢＥナイロン１０１５Ｂ」 宇部興産（株）社製）９９．８質量部と酸化防止剤（チバガイギー社製：イルガノイルガノックス１０１０）０．２質量部とを混練して樹脂ペレットを得た。そして、得られた樹脂ペレットを、１０５℃で、４時間乾燥した後、射出成形機（ＦＵＮＵＣ社製：α５０Ｃ）を用いて樹脂温度２６０℃、金型温度８５℃の条件で成形して、比較例７の消弧用樹脂加工品を得た。 (Comparative Example 7)
99.8 parts by mass of nylon 6 resin (trade name: “UBE nylon 1015B” manufactured by Ube Industries, Ltd.) and 0.2 part by mass of an antioxidant (manufactured by Ciba Geigy: Irgano Irganox 1010) were kneaded. Resin pellets were obtained. And after drying the obtained resin pellet at 105 degreeC for 4 hours, it shape | molds on the conditions of the resin temperature of 260 degreeC and metal mold | die temperature of 85 degreeC using the injection molding machine (FUNUC company make: α50C), and compared. The arc extinguishing resin processed product of Example 7 was obtained.

実施例１〜３、比較例１〜７の消弧用樹脂加工品の成形加工性を評価した。また、この消弧用樹脂加工品を、図１の回路遮断器の消弧室１３として用い、短絡試験、耐熱性試験、難燃性試験を行った。   The moldability of the arc extinguishing resin processed products of Examples 1 to 3 and Comparative Examples 1 to 7 was evaluated. In addition, this arc extinguishing resin processed product was used as the arc extinguishing chamber 13 of the circuit breaker of FIG. 1, and a short circuit test, a heat resistance test, and a flame retardance test were performed.

短絡試験は、開成状態において、３相４４０Ｖ／５０ｋＡの条件で通電して可動接触子を開離させてアーク電流を発生させ、このアーク電流の遮断性（消弧性）と消弧装置の破損の有無（内圧性）、表面状態（耐熱性）を確認した。   In the short-circuit test, in the open state, current is passed under the condition of three-phase 440V / 50kA to open the movable contact to generate an arc current. This arc current is interrupted (arc extinction) and the arc-extinguishing device is damaged. The presence or absence (internal pressure property) and surface state (heat resistance) were confirmed.

遮断性は、短絡電流が遮断されることで合格とした。   The interruption property was determined to be acceptable when the short-circuit current was interrupted.

成形加工性は、成形時に発泡、鼻タレなどの問題の有無を目視で評価し、目視で確認できなければ合格とした。   Formability was evaluated by visually evaluating the presence or absence of problems such as foaming and nasal sagging at the time of molding.

難燃性は、ＵＬ−９４試験に準拠した試験片（長さ５インチ、幅１／２インチ、厚さ３．２ｍｍ）を作製し、試験片を垂直に取りつけ、ブンゼンバーナーで１０秒間接炎後の燃焼時間を記録した。更に、消火後２回目の１０秒間接炎し再び接炎後の燃焼時間を記録し、燃焼時間の合計と２回目消火後の赤熱燃焼（グローイング）時間と綿を発火させる滴下物の有無により、ＵＬ−９４試験に準拠して判定した。   For flame retardancy, test specimens (length 5 inches, width 1/2 inches, thickness 3.2 mm) compliant with UL-94 test were prepared, the specimens were mounted vertically, and a 10 second indirect flame with a Bunsen burner. The later burning time was recorded. Furthermore, the second 10 second indirect flame after extinguishing and recording the burning time after flame contact again, the total burning time, the red burning time after the second extinguishing (growing) time and the presence or absence of dripping matter to ignite cotton, The determination was made according to the UL-94 test.

金属汚染性は、１２０℃環境下に３００時間放置した後の接触抵抗を測定し、接触抵抗値が５０ｍΩ以下であれば合格とした。   For metal contamination, the contact resistance after being left in a 120 ° C. environment for 300 hours was measured, and if the contact resistance value was 50 mΩ or less, it was determined to be acceptable.

上記試験結果を、表１にまとめて記す。   The test results are summarized in Table 1.

上記結果より、実施例１〜３の消弧用樹脂加工品は、難燃性、耐熱性及び成形加工性に優れ、またこの消弧用樹脂加工品からなる消弧装置を用いた回路遮断機は、電流遮断時に接点から発生するアークを効率よく消弧でき、また、消弧時において消弧室の破損が見られなかった。   From the above results, the arc extinguishing resin processed products of Examples 1 to 3 are excellent in flame retardancy, heat resistance, and moldability, and the circuit breaker using the arc extinguishing device made of this arc extinguishing resin processed product. Can effectively extinguish the arc generated from the contact when the current is interrupted, and the arc-extinguishing chamber was not damaged during the extinction.

本発明の回路遮断器の破断斜視図を示す一例である。It is an example which shows the fracture | rupture perspective view of the circuit breaker of this invention. 同回路遮断器に用いる消弧室の斜視図である。It is a perspective view of the arc-extinguishing chamber used for the circuit breaker. 同回路遮断器に用いる同消弧装置の断面図である。It is sectional drawing of the arc-extinguishing apparatus used for the circuit breaker.

符号の説明Explanation of symbols

１：可動接触子
２：グリット
４：電源側端子
５：固定接触子
６：可動接点
７：固定接点
９：アークホーン
１２：絶縁体
１３：消弧室
１４：条溝 1: movable contact 2: grit 4: power supply side terminal 5: fixed contact 6: movable contact 7: fixed contact 9: arc horn 12: insulator 13: arc extinguishing chamber 14: groove

Claims (9)

メチレン鎖の水素原子の一部が水酸基で置換され、メチレン基１モルに対して、水酸基を０．２〜０．７モル含有するポリオレフィン樹脂（Ａ）と、末端不飽和結合を有する反応性有機リン系難燃剤（Ｂ）とを含む樹脂組成物を、成形後に放射線架橋を施したことを特徴とする消弧用樹脂加工品。   A part of hydrogen atoms in the methylene chain is substituted with a hydroxyl group, a polyolefin resin (A) containing 0.2 to 0.7 mol of hydroxyl group per 1 mol of methylene group, and a reactive organic compound having a terminal unsaturated bond An arc-extinguishing resin processed product obtained by subjecting a resin composition containing a phosphorus-based flame retardant (B) to radiation crosslinking after molding. 前記樹脂組成物が、オキシメチレンから誘導される繰り返し単位の含有量が７５〜１００モル％であるポリアセタール系樹脂（Ｃ）を、前記ポリオレフィン樹脂（Ａ）１００質量部に対して５〜９０質量部含有する、請求項１に記載の消弧用樹脂加工品。   5 to 90 parts by mass of the polyacetal resin (C) in which the resin composition contains 75 to 100 mol% of a repeating unit derived from oxymethylene with respect to 100 parts by mass of the polyolefin resin (A). The arc extinguishing resin processed product according to claim 1, which is contained. 前記樹脂組成物が、ガラスファイバー、チタン酸バリウムウィスカー、シリカゲル微粒子、ベーマイト、タルク、炭酸マグネシウム及び金属水酸化物から選ばれた１種以上の無機フィラー（Ｄ）を、１〜７０質量％含有する、請求項１又は２に記載の消弧用樹脂加工品。   The resin composition contains 1 to 70% by mass of one or more inorganic fillers (D) selected from glass fiber, barium titanate whisker, silica gel fine particles, boehmite, talc, magnesium carbonate and metal hydroxide. The arc extinguishing resin processed product according to claim 1 or 2. 前記ポリオレフィン樹脂（Ａ）の分解潜熱が３０ｃａｌ／g以上である、請求項１〜３のいずれか一つに記載の消弧用樹脂加工品。   The arc extinguishing resin processed product according to any one of claims 1 to 3, wherein a latent heat of decomposition of the polyolefin resin (A) is 30 cal / g or more. 前記ポリオレフィン樹脂（Ａ）が、エチレン−ビニルアルコール共重合体である、請求項１〜４のいずれか一つに記載の消弧用樹脂加工品。   The arc-extinguishing resin processed product according to any one of claims 1 to 4, wherein the polyolefin resin (A) is an ethylene-vinyl alcohol copolymer. 前記反応性有機リン系難燃剤（Ｂ）が、下記式（Ｉ）及び／又は下式（ＩＩ）に示される有機リン化合物であり、前記樹脂組成物中に０．５〜２０質量％含有される、請求項１〜５のいずれか一つに記載の消弧用樹脂加工品。

（式（Ｉ）中、Ｒ１〜Ｒ４はそれぞれＣＨ２＝ＣＹ１−Ｙ２−、又はヘテロ原子を含んでもよい一官能性の芳香族炭化水素系基を表し、Ｒ５はヘテロ原子を含んでもよい二官能性の芳香族炭化水素系基を表す。Ｘ１〜Ｘ４はそれぞれ−Ｏ−、−ＮＨ−、−（ＣＨ２＝ＣＹ１−Ｙ２）Ｎ−より選択される基を表し、Ｘ１〜Ｘ４の少なくとも１つは−ＮＨ−、又は−（ＣＨ２＝ＣＹ１−Ｙ２）Ｎ−を含む。Ｒ１〜Ｒ４及びＸ１〜Ｘ4の少なくとも１つはＣＨ２＝ＣＹ１−Ｙ２−を含む。Ｙ１は水素又はメチル基を表し、Ｙ２は炭素数１〜５のアルキレン基、又は−ＣＯＯ−Ｙ３−を表す。ここで、Ｙ３は炭素数１〜５のアルキレン基を表す。）

（式（ＩＩ）中、１分子中に少なくとも１つのＰ−Ｃ結合を含み、Ａｒ1とＡｒ２は、それぞれ炭素数２０以下の易動性水素を含まない二官能性の芳香族炭化水素系基を表し、ｎは０〜２の整数である。Ｒ６〜Ｒ１０はそれぞれ、−ＮＨＣＨ２ＣＨ=ＣＨ２、−Ｎ(ＣＨ２ＣＨ＝ＣＨ２)２、−ＯＣＨ２ＣＨ＝ＣＨ２、−ＣＨ２ＣＨ＝ＣＨ２、−ＣＨ２ＣＨ２ＯＣＨ＝ＣＨ２、−(Ｃ６Ｈ４)−ＣＨ＝ＣＨ２、−Ｏ(Ｃ６Ｈ４)−ＣＨ＝ＣＨ２、−ＣＨ２(Ｃ６Ｈ４)−ＣＨ＝ＣＨ２、−ＮＨ(Ｃ６Ｈ４)−ＣＨ＝ＣＨ２、−Ｎ(ＣＨ２ＣＨ＝ＣＨ２)−(Ｃ６Ｈ４)−ＣＨ＝ＣＨ２、−Ｏ−Ｒ−ＯＯＣ−Ｃ(Ｒ’)＝ＣＨ２、−ＮＨ−Ｒ−ＮＨＣＯ−Ｃ(Ｒ’)＝ＣＨ２、炭素数１２以下のアリール基より選択される基を表す。ここで、Ｒは炭素数２〜５のアルキレン基、Ｒ’は水素またはメチル基を表す。Ｒ６〜Ｒ１０の少なくとも１つは−ＣＨ＝ＣＨ２基又は−Ｃ（ＣＨ３）＝ＣＨ２基を含む。） The reactive organophosphorous flame retardant (B) is an organophosphorus compound represented by the following formula (I) and / or the following formula (II), and is contained in an amount of 0.5 to 20% by mass in the resin composition. The arc extinguishing resin processed product according to any one of claims 1 to 5.

(In formula (I), R 1 to R 4 each represents CH 2 ═CY 1 —Y 2 — or a monofunctional aromatic hydrocarbon group that may contain a hetero atom, and R 5 represents a hetero atom. X 1 to X 4 each represents a group selected from —O—, —NH—, and — (CH 2 ═CY 1 —Y 2 ) N—. And at least one of X 1 to X 4 contains —NH— or — (CH 2 ═CY 1 —Y 2 ) N—, wherein at least one of R 1 to R 4 and X 1 to X 4 is CH. 2 = CY 1 -Y 2 -is included, Y 1 represents hydrogen or a methyl group, Y 2 represents an alkylene group having 1 to 5 carbon atoms, or —COO—Y 3 —, where Y 3 represents carbon. Represents an alkylene group of formula 1-5.)

(In the formula (II), a bifunctional aromatic hydrocarbon system containing at least one P—C bond in one molecule, and Ar 1 and Ar 2 each containing no mobile hydrogen having 20 or less carbon atoms Represents a group, and n is an integer of 0 to 2. R 6 to R 10 are —NHCH 2 CH═CH 2 , —N (CH 2 CH═CH 2 ) 2 , —OCH 2 CH═CH 2 , respectively. -CH 2 CH = CH 2, -CH 2 CH 2 OCH = CH 2, - (C 6 H 4) -CH = CH 2, -O (C 6 H 4) -CH = CH 2, -CH 2 (C 6 H 4) -CH = CH 2 , -NH (C 6 H 4) -CH = CH 2, -N (CH 2 CH = CH 2) - (C 6 H 4) -CH = CH 2, -O- R—OOC—C (R ′) ═CH 2 , —NH—R—NHCO—C (R ′) ═CH 2 , a group selected from aryl groups having 12 or less carbon atoms R represents an alkylene group having 2 to 5 carbon atoms, R ′ represents hydrogen or a methyl group, and at least one of R 6 to R 10 is —CH═CH 2 group or —C (CH 3 ) ═. Including CH 2 groups) 前記ポリアセタール系樹脂（Ｃ）が、オキシメチレン−オキシエチレン共重合体又はオキシメチレン重合体である、請求項２〜６のいずれか一つに記載の消弧用樹脂加工品。   The arc-extinguishing resin processed product according to any one of claims 2 to 6, wherein the polyacetal resin (C) is an oxymethylene-oxyethylene copolymer or an oxymethylene polymer. 前記ポリオレフィン樹脂（Ａ）中に前記ポリアセタール系樹脂（Ｃ）が分散し、ミクロ相分離構造を形成している、請求項２〜７のいずれか一つに記載の消弧用樹脂加工品。   The arc-extinguishing resin processed product according to any one of claims 2 to 7, wherein the polyacetal resin (C) is dispersed in the polyolefin resin (A) to form a microphase separation structure. 固定接点を有する固定接触子と、前記固定接触子と接触する可動接点を有し前記固定接触子に対して開閉動作をする可動接触子と、前記固定接触子と前記可動接触子とが開閉動作する際に発生するアークを消弧する消弧装置とを備えた回路遮断器において、
前記消弧装置が、請求項１〜８のいずれか一つに記載の消弧用樹脂加工品からなることを特徴とする回路遮断器。 A fixed contact having a fixed contact, a movable contact having a movable contact that contacts the fixed contact and opening / closing with respect to the fixed contact, and an opening / closing operation of the fixed contact and the movable contact In a circuit breaker comprising an arc extinguishing device for extinguishing an arc generated when
The circuit breaker, wherein the arc extinguishing device is made of the arc extinguishing resin processed product according to any one of claims 1 to 8.
JP2006314499A 2006-11-21 2006-11-21 Arc extinguishing resin processed product and circuit breaker using the same Expired - Fee Related JP4817316B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2006314499A JP4817316B2 (en) 2006-11-21 2006-11-21 Arc extinguishing resin processed product and circuit breaker using the same
DE102007055667A DE102007055667B4 (en) 2006-11-21 2007-11-21 Arc quenching resin molding and use of an arc extinguishing resin molding in a circuit breaker
CN2007101934348A CN101186728B (en) 2006-11-21 2007-11-21 Arc extinguishing resin molding articles and breaker using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006314499A JP4817316B2 (en) 2006-11-21 2006-11-21 Arc extinguishing resin processed product and circuit breaker using the same

Publications (2)

Publication Number Publication Date
JP2008130375A true JP2008130375A (en) 2008-06-05
JP4817316B2 JP4817316B2 (en) 2011-11-16

Family

ID=39326636

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006314499A Expired - Fee Related JP4817316B2 (en) 2006-11-21 2006-11-21 Arc extinguishing resin processed product and circuit breaker using the same

Country Status (3)

Country Link
JP (1) JP4817316B2 (en)
CN (1) CN101186728B (en)
DE (1) DE102007055667B4 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006054030B4 (en) * 2006-11-16 2010-06-17 Abb Ag Electrical switching device
JP4655094B2 (en) 2008-02-08 2011-03-23 富士電機機器制御株式会社 Arc extinguishing resin processed product and circuit breaker using the same
JP4529034B2 (en) 2008-05-16 2010-08-25 富士電機機器制御株式会社 Arc extinguishing resin processed product and circuit breaker using the same
DE102018109389A1 (en) * 2018-04-19 2019-10-24 Tdk Electronics Ag switching device
CN113517163B (en) * 2021-07-23 2023-02-28 西安理工大学 Strong air-blowing current-limiting type arc extinguish chamber of high-voltage circuit breaker

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08185785A (en) * 1994-12-28 1996-07-16 Mitsubishi Electric Corp Circuit breaker
JPH0971690A (en) * 1995-09-07 1997-03-18 Nippon Unicar Co Ltd Flame-retardant ethylenic resin composition
JP2002251932A (en) * 1994-05-23 2002-09-06 Mitsubishi Electric Corp Method for converting metals scattered in arcing into insulation material
WO2005012415A1 (en) * 2003-08-01 2005-02-10 Fuji Electric Holdings Co., Ltd. Reactive flame retardant and flame-retardant processed resin obtained with the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1480661A (en) * 1965-05-21 1967-08-07
JPS57202003A (en) * 1981-06-03 1982-12-10 Hitachi Ltd Sf6 gas insulating electric device and method of producing same
TW293130B (en) * 1994-03-10 1996-12-11 Mitsubishi Electric Corp
AU2003275594A1 (en) * 2002-10-23 2004-05-13 Fuji Electric Holdings Co., Ltd. Molded resin for electrical part and process for producing the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002251932A (en) * 1994-05-23 2002-09-06 Mitsubishi Electric Corp Method for converting metals scattered in arcing into insulation material
JPH08185785A (en) * 1994-12-28 1996-07-16 Mitsubishi Electric Corp Circuit breaker
JPH0971690A (en) * 1995-09-07 1997-03-18 Nippon Unicar Co Ltd Flame-retardant ethylenic resin composition
WO2005012415A1 (en) * 2003-08-01 2005-02-10 Fuji Electric Holdings Co., Ltd. Reactive flame retardant and flame-retardant processed resin obtained with the same

Also Published As

Publication number Publication date
DE102007055667B4 (en) 2013-06-20
CN101186728B (en) 2011-10-19
DE102007055667A1 (en) 2008-05-29
CN101186728A (en) 2008-05-28
JP4817316B2 (en) 2011-11-16

Similar Documents

Publication Publication Date Title
JP4529034B2 (en) Arc extinguishing resin processed product and circuit breaker using the same
JP4655094B2 (en) Arc extinguishing resin processed product and circuit breaker using the same
KR100896359B1 (en) Flame retardant thermoplastic composition and articles comprising the same
EP2152809B1 (en) Flame retardant thermoplastic composition and articles comprising the same
EP1735382B1 (en) Flame retardant composition
EP1798256B1 (en) Non-halogen flame-retardant resin composition
US7417083B2 (en) Flame retardant composition
JP4827187B2 (en) Arc extinguishing resin processed product and circuit breaker using the same
JP4817316B2 (en) Arc extinguishing resin processed product and circuit breaker using the same
WO2006126393A1 (en) Flame-retardant resin processed article
JP2009120680A (en) Flame-retardant resin composition
JP5003630B2 (en) Arc extinguishing resin processed product and circuit breaker using the same
KR102295665B1 (en) Non-halogen flame retardant resin composition and flame retardant resin molded articles produced by the same
JP4941409B2 (en) Arc extinguishing resin processed product and circuit breaker using the same
JP2005132967A (en) Flame-retardant styrene-based resin composition and molded product thereof
KR102437626B1 (en) Flexible UV-resistant poly(phenylene ether) composition and insulated wire and jacketed cable comprising same
JP2013010851A (en) Flame-retardant styrenic resin composition and molded product thereof

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090126

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110422

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110426

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110623

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A711

Effective date: 20110720

TRDD Decision of grant or rejection written
A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20110720

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110823

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110825

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140909

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees