JP3549967B2 - Vinyl chloride resin composition as a coating material for electric wires to be placed in contact with or close to urethane material - Google Patents
Vinyl chloride resin composition as a coating material for electric wires to be placed in contact with or close to urethane material Download PDFInfo
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- JP3549967B2 JP3549967B2 JP31977295A JP31977295A JP3549967B2 JP 3549967 B2 JP3549967 B2 JP 3549967B2 JP 31977295 A JP31977295 A JP 31977295A JP 31977295 A JP31977295 A JP 31977295A JP 3549967 B2 JP3549967 B2 JP 3549967B2
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- Prior art keywords
- vinyl chloride
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- chloride resin
- urethane
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Description
【０００１】
【発明の属する技術分野】
本発明は、塩化ビニル系樹脂組成物に関する。詳しくは電気絶縁性が良好で、アミン系化合物に曝されても電気絶縁性が低下することがなく、劣化や伸び等の低下の少ない電線被覆材料に適した塩化ビニル系樹脂組成物に関する。
【０００２】
【従来の技術】
従来より、ポリ塩化ビニルで被覆された電線は、住宅設備、建築材料等の内部に配線され使用されている。これらの住宅設備、建築材料は保温性向上、強度向上の目的で、内部にウレタンを注入発泡させることがある。また、近年では、床暖房システムが住宅や病院その他の施設に広く採用、取付けられるようになったが、床暖房システムの電気ヒーター線の多くはポリ塩化ビニル被覆電線であり、また、システムには保温材として内部に発泡ウレタンが充填されることがある。
【０００３】
このような構造体において、ポリ塩化ビニルで被覆された電線が、注入発泡したウレタンに接触あるいは近接した場所に位置した場合、発泡ウレタン中のアミン系化合物によって電線被覆材の劣化、変質という不都合な現象が生じ、電線被覆材の著しい伸びの低下、亀裂、絶縁性能の低下が起こる。特にこの現象は熱によって著しく促進される。
【０００４】
このため、ウレタンを注入発泡させる場合は、ポリ塩化ビニル被覆電線の配線位置は、発泡ポリウレタンに接触しないように、更には発泡ポリウレタンと接近しないように設計する必要がある。アミン系化合物は気化してポリ塩化ビニルを劣化させることがあるからである。特に床暖房システムのようにウレタン及び電線が高温となる場合は特に慎重な設計が必要である。
【０００５】
ポリ塩化ビニルにアミン系化合物による劣化、変質を防ぐ性質を付与するために、自動車内装材料分野等では、過塩素酸バリウム、過塩素酸ナトリウム等を塩化ビニル樹脂組成物に配合することが知られている。
【０００６】
過塩素酸バリウム、過塩素酸ナトリウムを配合した塩化ビニル樹脂組成物は、アミン系化合物との反応による、組成物の変色が少なく、自動車内装部品等には好適であるが、電線被覆材料として必須の特性である電気絶縁性が劣るため、電線被覆材料として使用することはできなかった。
【０００７】
これらを解決するため、ポリ塩化ビニルに過塩素酸処理ハイドロタルサイトとクレーを同時に配合することにより、電気絶縁性が良好で、ウレタンに接触あるいは近接してもアミン系化合物のポリ塩化ビニルの分解作用による電気絶縁性の低下及び伸びの低下が少ない電線被覆材料に適した塩化ビニル系樹脂組成物になることを見出して本発明を完成した。
【０００８】
【課題を解決するための手段】
即ち、本発明は、ウレタン材料と接触あるいは近接した個所に配線する電線の被覆材料であって、塩化ビニル系樹脂１００重量部に、過塩素酸処理ハイドロタルサイト０．３〜１０重量部、クレー３〜４０重量部及び可塑剤２０〜１５０重量部が配合されていることを特徴とする塩化ビニル系樹脂組成物を要旨とするものである。
【０００９】
以下、本発明を詳細に説明する。
本発明の組成物の塩化ビニル系樹脂は、塩化ビニル単独重合体、塩化ビニルモノマーとを主要成分とするエチレン、酢酸ビニル等との共重合体を含む。
【００１０】
本発明の組成物の可塑剤は、塩化ビニル系樹脂に通常使用されるものであれば、特に限定されない。
これらの可塑剤のうち、分子量４００以上の、加熱時に揮発性の小さい可塑剤を使用することが望ましい。
【００１１】
可塑剤の配合量は、通常電線被覆材料として用いられる組成物に配合される量であればよい。具体的には、塩化ビニル系樹脂１００重量部に対して、２０〜１５０重量部、好ましくは３０〜１００重量部である。
【００１２】
本発明の必須成分である過塩素酸処理ハイドロタルサイトは、ハイドロタルサイトを過塩素酸の希薄水溶液中に加えて攪拌するか、又は、ハイドロタルサイトに過塩素酸の濃厚水溶液を加えて攪拌し、その後必要に応じてろ過、脱水又は乾燥することにより得られる。過塩素酸処理をすることにより、ハイドロタルサイトに結合する水酸基の少なくとも一部が過塩素酸イオンにおきかわる。過塩素酸処理ハイドロタルサイトの配合量は、塩化ビニル系樹脂１００重量部に対して０．３〜１０重量部、好ましくは０．５〜６重量部である。０．３重量部よりも少ないとアミン系化合物による、熱劣化を防ぐことが難しく、また、１０重量部よりも多いとブルーミングが発生する。
【００１３】
本発明の必須成分であるクレーの配合量は、塩化ビニル系樹脂１００重量部に対して３〜４０重量部、好ましくは５〜３０重量部である。配合量が３重量部より少ないと電線被覆に用いた場合、良好な電気絶縁性が得られず、４０重量部より多いと、分散不良を起こし、電線被覆材料としての表面の平滑性が損なわれる。
【００１４】
本発明の組成物には、必要に応じて、熱安定剤、光安定剤、滑剤、充填剤等、通常塩化ビニル系樹脂に配合される添加剤を、電線被覆材料としての物性を低下させない範囲で適宜配合することができる。
【００１５】
【発明の実施の形態】
本発明の塩化ビニル系樹脂組成物は、塩化ビニル系樹脂１００重量部に、過塩素酸処理ハイドロタルサイト０．３〜１０重量部、クレー３〜４０重量部及び可塑剤２０〜１５０重量部、その他必要に応じて熱安定剤、光安定剤、滑剤、充填剤等を配合して、加熱、溶融して、均一に混練することにより容易に得られる。
【００１６】
【実施例】
以下、実施例を挙げて本発明を具体的に説明するが、本発明は、これらの実施例に限定されるものではない。
実施例１〜５及び比較例１〜５
表−１に示す各成分を均一に混合して、溶融、混練し、得られた各組成物について、引張伸び及び電気絶縁性を測定した。
【００１７】
（１）引張伸び測定
各組成物をプレス成形して厚さ１ｍｍのシート状サンプルを作製した。
このシートをウレタン発泡用金型の底面に挿入し、ポリオール１００重量部に対してイソシアネート５４重量部の割合からなる発泡性ウレタンを１０秒間高速攪拌した後、注入し金型内部で発泡させてシートの片面に厚さ１０ｍｍの発泡ウレタンを定着させた。耐アミン性試験は、サンプルを１１０℃及び１２０℃に調節されたオーブン内で、４０日及び３０日放置した後、ウレタンを除去して、シートの伸び残率をＪＩＳ．Ｋ６７２３に規定された方法で測定した。試験の結果、表−１に示す通り、各実施例の過塩素酸処理ハイドロタルサイトを添加した組成物には伸びの低下は殆どみられないが、各比較例の過塩素酸処理ハイドロタルサイトを添加しない組成物では伸びが著しく低下することが確認された。
【００１８】
（２）電気絶縁性測定
上記（１）の引張伸び測定の場合と同様の方法でシート状サンプルを作製し、ウレタンを定着する前のシートと、ウレタンを定着させて上記と同様に加熱試験した後のシートの体積固有抵抗率をＪＩＳ Ｋ６７２３に規定された方法で測定した。試験の結果、表−１に示す通り、各実施例において、耐アミン性試験前のシートの体積固有抵抗率が大きく、耐アミン性試験後の体積固有抵抗率の低下が少ないことが確認された。
【００１９】
【表１】
【発明の効果】
本発明の組成物は、アミン系化合物により劣化、変質や伸びや電気絶縁性の低下を招かない電線被覆材料に好適な樹脂組成物であり、住宅などの建物の保温材や断熱材として多用されているウレタン材料と接触あるいは近接する個所に配線する電線の被覆材料として優れた性質を発揮するものである。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vinyl chloride resin composition. More specifically, the present invention relates to a vinyl chloride-based resin composition which has good electrical insulation properties, does not decrease in electrical insulation properties even when exposed to an amine-based compound, and is suitable for an electric wire coating material with little deterioration or elongation.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, electric wires coated with polyvinyl chloride have been used by wiring inside housing equipment, building materials, and the like. Urethane may be injected and foamed into these housing equipment and building materials for the purpose of improving heat retention and strength. In recent years, floor heating systems have been widely adopted and installed in homes, hospitals and other facilities, but most of the electric heater wires of floor heating systems are polyvinyl chloride coated electric wires, Urethane foam may be filled inside as a heat insulating material.
[0003]
In such a structure, when an electric wire coated with polyvinyl chloride comes into contact with or close to the injected and foamed urethane, the amine-based compound in the urethane foam deteriorates and deteriorates the electric wire coating material. Phenomenon occurs, resulting in a remarkable decrease in elongation, cracks and insulation performance of the wire covering material. In particular, this phenomenon is greatly enhanced by heat.
[0004]
For this reason, when urethane is injected and foamed, it is necessary to design the wiring position of the polyvinyl chloride-coated electric wire so that it does not come into contact with the polyurethane foam and further does not approach the polyurethane foam. This is because the amine compound may vaporize and deteriorate polyvinyl chloride. In particular, when urethane and electric wires are heated to a high temperature such as a floor heating system, careful design is required.
[0005]
In the field of automotive interior materials, it is known to add barium perchlorate, sodium perchlorate, etc. to a polyvinyl chloride resin composition in order to give polyvinyl chloride a property of preventing deterioration and deterioration due to amine compounds. ing.
[0006]
A vinyl chloride resin composition containing barium perchlorate and sodium perchlorate has a low discoloration of the composition due to the reaction with an amine compound, and is suitable for automobile interior parts and the like, but is essential as a wire coating material. Because of its inferior electrical insulation properties, it could not be used as a wire covering material.
[0007]
To solve these problems, by blending perchloric acid-treated hydrotalcite and clay simultaneously with polyvinyl chloride, it has good electrical insulation properties and decomposes amine-based compound polyvinyl chloride even when it comes into contact with or comes close to urethane. The present inventors have found that a vinyl chloride-based resin composition suitable for an electric wire covering material with less decrease in electric insulation and elongation due to action is completed, and completed the present invention.
[0008]
[Means for Solving the Problems]
That is, the present invention relates to a coating material for an electric wire to be wired at a place in contact with or close to a urethane material, wherein 0.3 to 10 parts by weight of perchloric acid-treated hydrotalcite is added to 100 parts by weight of a vinyl chloride resin. A gist of the present invention is a vinyl chloride resin composition containing 3 to 40 parts by weight and 20 to 150 parts by weight of a plasticizer.
[0009]
Hereinafter, the present invention will be described in detail.
The vinyl chloride resin of the composition of the present invention includes a vinyl chloride homopolymer, and a copolymer of vinyl chloride monomer with ethylene, vinyl acetate, or the like, which is a main component.
[0010]
The plasticizer of the composition of the present invention is not particularly limited as long as it is one usually used for a vinyl chloride resin.
Among these plasticizers, it is desirable to use a plasticizer having a molecular weight of 400 or more and having low volatility when heated.
[0011]
The compounding amount of the plasticizer may be any amount as long as it is a compounding amount in a composition usually used as an electric wire covering material. Specifically, the amount is 20 to 150 parts by weight, preferably 30 to 100 parts by weight, based on 100 parts by weight of the vinyl chloride resin.
[0012]
Perchloric acid-treated hydrotalcite, which is an essential component of the present invention, is obtained by adding hydrotalcite to a dilute aqueous solution of perchloric acid and stirring, or adding a concentrated aqueous solution of perchloric acid to hydrotalcite and stirring. Then, it is obtained by filtering, dehydrating or drying as required. By performing the perchloric acid treatment, at least a part of the hydroxyl groups bonded to the hydrotalcite is replaced with perchlorate ions. The blending amount of perchloric acid-treated hydrotalcite is 0.3 to 10 parts by weight, preferably 0.5 to 6 parts by weight, based on 100 parts by weight of the vinyl chloride resin. If the amount is less than 0.3 part by weight, it is difficult to prevent thermal deterioration due to the amine compound, and if the amount is more than 10 parts by weight, blooming occurs.
[0013]
The amount of the clay, which is an essential component of the present invention, is 3 to 40 parts by weight, preferably 5 to 30 parts by weight, based on 100 parts by weight of the vinyl chloride resin. If the amount is less than 3 parts by weight, good electrical insulation cannot be obtained when used for wire coating. If the amount is more than 40 parts by weight, poor dispersion occurs, and the surface smoothness as a wire coating material is impaired. .
[0014]
In the composition of the present invention, if necessary, additives usually blended with a vinyl chloride resin, such as a heat stabilizer, a light stabilizer, a lubricant, and a filler, may be added to a range that does not deteriorate the physical properties as a wire coating material. Can be appropriately blended.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
The vinyl chloride-based resin composition of the present invention comprises, per 100 parts by weight of the vinyl chloride-based resin, 0.3 to 10 parts by weight of perchloric acid-treated hydrotalcite, 3 to 40 parts by weight of a clay, and 20 to 150 parts by weight of a plasticizer; In addition, it can be easily obtained by blending a heat stabilizer, a light stabilizer, a lubricant, a filler and the like as necessary, heating, melting, and uniformly kneading.
[0016]
【Example】
Hereinafter, the present invention will be described specifically with reference to Examples, but the present invention is not limited to these Examples.
Examples 1 to 5 and Comparative Examples 1 to 5
The components shown in Table 1 were uniformly mixed, melted and kneaded, and the tensile elongation and the electrical insulation were measured for each of the obtained compositions.
[0017]
(1) Measurement of Tensile Elongation Each composition was press-molded to produce a 1 mm thick sheet sample.
This sheet is inserted into the bottom surface of a urethane foaming mold, and foamable urethane composed of 54 parts by weight of isocyanate with respect to 100 parts by weight of polyol is stirred at high speed for 10 seconds, and then injected and foamed inside the mold to form a sheet. Was fixed with urethane foam having a thickness of 10 mm on one side. In the amine resistance test, the sample was left in an oven controlled at 110 ° C. and 120 ° C. for 40 days and 30 days, urethane was removed, and the residual elongation of the sheet was measured according to JIS. It was measured by the method specified in K6723. As a result of the test, as shown in Table 1, the composition to which the perchloric acid-treated hydrotalcite of each Example was added showed almost no decrease in elongation, but the perchloric acid-treated hydrotalcite of each Comparative Example It was confirmed that the composition in which no was added significantly reduced the elongation.
[0018]
(2) Measurement of electrical insulation A sheet-like sample was prepared in the same manner as in the case of the tensile elongation measurement in (1) above, and the sheet before fixing urethane and the urethane were fixed and subjected to a heating test in the same manner as described above. The specific volume resistivity of the subsequent sheet was measured by a method specified in JIS K6723. As a result of the test, as shown in Table 1, in each example, it was confirmed that the volume resistivity of the sheet before the amine resistance test was large and the decrease in the volume resistivity after the amine resistance test was small. .
[0019]
[Table 1]
【The invention's effect】
The composition of the present invention is a resin composition suitable for an electric wire coating material that does not cause deterioration, deterioration, elongation, or a decrease in electric insulation due to an amine-based compound, and is frequently used as a heat insulating material or a heat insulating material for buildings such as houses. It exhibits excellent properties as a covering material for electric wires to be wired in contact with or close to the urethane material.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31977295A JP3549967B2 (en) | 1995-11-15 | 1995-11-15 | Vinyl chloride resin composition as a coating material for electric wires to be placed in contact with or close to urethane material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31977295A JP3549967B2 (en) | 1995-11-15 | 1995-11-15 | Vinyl chloride resin composition as a coating material for electric wires to be placed in contact with or close to urethane material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09137019A JPH09137019A (en) | 1997-05-27 |
| JP3549967B2 true JP3549967B2 (en) | 2004-08-04 |
Family
ID=18114015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31977295A Expired - Fee Related JP3549967B2 (en) | 1995-11-15 | 1995-11-15 | Vinyl chloride resin composition as a coating material for electric wires to be placed in contact with or close to urethane material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3549967B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6581888B2 (en) * | 2015-11-30 | 2019-09-25 | シャープ株式会社 | Thermal insulation structure and refrigerator |
-
1995
- 1995-11-15 JP JP31977295A patent/JP3549967B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09137019A (en) | 1997-05-27 |
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