【発明の詳細な説明】[Detailed description of the invention]
〔技術分野〕
本発明は耐熱性のすぐれた耐熱性絶縁電線に関
する。
〔従来技術〕
近年モーター、トランス等が小型化、軽量化さ
れ又、信頼性の向上が要求されるようになつたた
め、これらに使用するエナメル線の一層の耐熱化
が必要となつてきた。周知の通りエナメル線は有
機樹脂を溶剤に溶解もしくは分散させて得た絶縁
塗料を導体に塗布焼付けて製造される。近年の耐
熱化の要求に対し多くの耐熱性有機樹脂が生産さ
れているが、その多くのものは、未だ充分な耐熱
性を有するとはいい難い。
最近、耐熱性樹脂としてラダー型シリコーンが
知られているが、そのオリゴマーを塗布・焼付し
て得た皮膜は可撓性(耐加工劣化性)に劣るため
に、可撓性が要求される焼付電線用としては使用
に適さない問題がある。
〔発明の要旨〕
上記の鑑み本発明は、耐熱性にすぐれ、しかも
可撓性のある特許請求の範囲に示す耐熱性絶縁電
線を提案するものである。
〔発明の具体的説明〕
即ち、本発明者の研究によれば、上記ラダー型
シリコーン系オリゴマーに適量の電気絶縁性有機
樹脂を混合すると、ラダー型シリコーンの可撓性
が改善され、且つ、その本来の耐熱性が活かし得
ることが判明した。
本発明に用いる絶縁塗料は、従来からエナメル
線に使用されている電気絶縁性有機樹脂、例えば
ポリビニルホルマール樹脂、ポリウレタン樹脂、
ポリエステル樹脂、ポリエステルイミド樹脂、ポ
リアミドイミド樹脂、ポリイミド樹脂と、構造式
〔〕
[Technical Field] The present invention relates to a heat-resistant insulated wire with excellent heat resistance. [Prior Art] In recent years, as motors, transformers, etc. have become smaller and lighter, and there has been a demand for improved reliability, it has become necessary to further improve the heat resistance of the enamelled wires used in these. As is well known, enameled wires are manufactured by applying an insulating paint obtained by dissolving or dispersing an organic resin in a solvent to a conductor and baking it. Although many heat-resistant organic resins have been produced in response to the recent demand for heat resistance, many of them still cannot be said to have sufficient heat resistance. Recently, ladder-type silicone has become known as a heat-resistant resin, but the film obtained by coating and baking the oligomer has poor flexibility (resistance to processing deterioration). There are problems that make it unsuitable for use as an electric wire. [Summary of the Invention] In view of the above, the present invention proposes a heat-resistant insulated wire as set forth in the claims that has excellent heat resistance and flexibility. [Specific Description of the Invention] That is, according to the research of the present inventor, when an appropriate amount of electrically insulating organic resin is mixed with the ladder-type silicone oligomer, the flexibility of the ladder-type silicone is improved, and the flexibility of the ladder-type silicone is improved. It was found that the inherent heat resistance could be utilized. The insulating paint used in the present invention is an electrically insulating organic resin conventionally used for enameled wires, such as polyvinyl formal resin, polyurethane resin,
Polyester resin, polyesterimide resin, polyamideimide resin, polyimide resin and structural formula []
〔式中Rはメチル基又はフエニル基であり、nは、2−100である。〕[In the formula, R is a methyl group or a phenyl group, and n is 2-100. ]
にて示されるラダー型シリコーン系オリゴマーと
からなるものである。該オリゴマーとしては、例
えばGR−100、GR150、GR650、GR908、
GR950(いずれもnが5〜10の米国Owens−
Illinois社製)が挙げられる。
この絶縁塗料は、前記した樹脂からなる絶縁塗
料にラダー型シリコーン系オリゴマーを混合溶解
することにより製造することが出来る。該オリゴ
マーは樹脂の耐熱性を向上する効果を有し、その
効果は、その添加量を増すと増大する傾向にあ
る。而して、該オリゴマーの好ましい添加量は、
樹脂100部(重量部、以下同様)に対し、50〜200
部である。
なお、添加量が200部を超えると得られた塗料
の焼付皮膜の外観が悪くなり、可撓性も悪くな
り、捲線が出来にくくなる。
以下の実施例において、本発明の内容を説明す
る。
比較例 1
直径1.0mmφの銅線上にポリイミドワニス(ト
レニース3000東レ社製)を数回繰返し塗布焼付け
て絶縁電線を得た。
比較例 2
直径1.0mmφの銅線上にポリエステルワニス
(デラコートE220GTI日東電工製)を数回繰返し
塗布焼付けて絶縁電線を得た。
比較例 3
直径1.0mmφの銅線上にポリエステルイミドワ
ニス(アイリミツド40H 日触スケネクタデイー
製)を数回繰返し塗布焼付けて絶縁電線を得た。
比較例 4
直径1.0mmφの銅線上にポリアミドイミドワニ
ス(HI−405−30 日立化成製)を数回繰返し塗
布焼付けて絶縁電線を得た。
実施例 1
直径1.0mmφの銅線上にポリイミドワニス(ト
レニース#3000 東レ社製)の樹脂分100部に対
してラダー型シリコーン系オリゴマー(GR−
100、メチル基数:フエニル基数比(以下M:P
と略す)=2:1、米国Owens−Illiois社製)を
100部添加混合溶解したワニスを数回繰り返し塗
布焼付けて絶縁電線を得た。
実施例 2
直径1.0mmφの銅線上にポリイミドワニス(パ
イルML 米国デユポン社製)の樹脂分100部に
対してラダー型シリコーン系オリゴマー(GR−
150、M:P=1:1、米国Owens−Illinois社
製)を100部添加混合溶解したワニスを数回繰り
返し塗布焼付けて絶縁電線を得た。
実施例 3
直径1.0mmφの銅線上にポリイミドワニス(ト
レニース#3000 東レ社製)の樹脂分100部に対
してラダー型シリコーン系オリゴマー(GR−
650、Rはすべてメチル基、米国Owens−Illinois
社製)を100部添加混合溶解したワニスを数回繰
り返し、塗布焼付けて絶縁電線を得た。
実施例 4
直径1.0mmφの銅線上にポリイミドワニス(ト
レニース#3000 東レ社製)の樹脂分100部に対
してラダー型シリコーン系オリゴマー(GR−
908、M:P=1:4、米国Owens−Illinois社
製)を100部添加混合溶解したワニスを数回繰り
返し、塗布焼付けて絶縁電線を得た。
実施例 5
直径1.0mmφの銅線上にポリイミドワニス(ト
レニース#3000 東レ社製)の樹脂分100部に対
してラダー型シリコーン系オリゴマー(GR−
950、Rはすべてフエニル基、米国Owens−
Illinois社製)を100部添加混合溶解したワニスを
数回繰り返し塗布焼付けて絶縁電線を得た。
実施例 6
直径1.0mmφの銅線上にポリエステルワニス
(デラコートE−220GTI 日東電工社製)の樹脂
分100部に対してラダー型シリコーン系オリゴマ
ー(GR−100 米国Owens−Illinois社製)を100
部添加混合溶解したワニスを数回繰り返し、塗布
焼付けて絶縁電線を得た。
実施例 7
直径1.0mmφの銅線上にポリエステルイミドワ
ニス(アイリミツド40H 日触スケネクタデイ社
製)の樹脂分100部に対してラダー型シリコーン
系オリゴマー(GR−150 米国Owens−Illinois
社製)を100部添加混合溶解したワニスを数回繰
り返し、塗布焼付けて絶縁電線を得た。
実施例 8
直径1.0mmφの銅線上にポリアミドワニス(HI
−405−30 日立化成社製)の樹脂分100部に対し
てラダー型シリコーン系オリゴマー(GR650
米国Owens−Illinois社製)を100部添加混合溶解
したワニスを数回繰り返し、塗布焼付けて絶縁電
線を得た。
上記各実施例、比較例で得た絶縁電線の特性を
第1表に示す。
It consists of a ladder-type silicone oligomer shown in . Examples of the oligomer include GR-100, GR150, GR650, GR908,
GR950 (U.S. Owens with n of 5 to 10)
(manufactured by Illinois). This insulating paint can be produced by mixing and dissolving a ladder-type silicone oligomer into an insulating paint made of the resin described above. The oligomer has the effect of improving the heat resistance of the resin, and this effect tends to increase as the amount added thereof increases. Therefore, the preferable amount of the oligomer to be added is:
50 to 200 parts for 100 parts of resin (parts by weight, same below)
Department. In addition, if the amount added exceeds 200 parts, the appearance of the baked coating of the obtained paint will deteriorate, the flexibility will deteriorate, and it will be difficult to form a wire. The content of the present invention will be explained in the following examples. Comparative Example 1 An insulated wire was obtained by repeatedly coating and baking polyimide varnish (Trenice 3000 manufactured by Toray Industries, Inc.) several times on a copper wire having a diameter of 1.0 mmφ. Comparative Example 2 Polyester varnish (Delacoat E220GTI manufactured by Nitto Denko) was repeatedly coated and baked on a copper wire having a diameter of 1.0 mm to obtain an insulated wire. Comparative Example 3 An insulated wire was obtained by repeatedly coating and baking polyester imide varnish (Airimitsu 40H manufactured by Nikko Schenectady) several times on a copper wire having a diameter of 1.0 mmφ. Comparative Example 4 Polyamide-imide varnish (HI-405-30 manufactured by Hitachi Chemical) was repeatedly coated and baked on a copper wire having a diameter of 1.0 mm to obtain an insulated wire. Example 1 Ladder type silicone oligomer (GR-
100, methyl group number: phenyl group number ratio (hereinafter M:P
) = 2:1, manufactured by Owens-Illiois, USA)
An insulated wire was obtained by repeatedly applying and baking 100 parts of the mixed and dissolved varnish several times. Example 2 A ladder-type silicone oligomer (GR-
A varnish prepared by adding and dissolving 100 parts of 150, M:P=1:1 (manufactured by Owens-Illinois, USA) was repeatedly coated and baked several times to obtain an insulated wire. Example 3 Ladder type silicone oligomer (GR-
650, all R's are methyl groups, Owens-Illinois, USA
A varnish prepared by adding 100 parts of varnish (manufactured by Co., Ltd.), mixed and dissolved, was applied and baked several times to obtain an insulated wire. Example 4 Ladder type silicone oligomer (GR-
908, M:P=1:4, manufactured by Owens-Illinois, USA), mixed and dissolved in a varnish of 100 parts, was applied and baked several times to obtain an insulated wire. Example 5 Ladder type silicone oligomer (GR-
950, all R's are phenyl groups, Owens-
An insulated wire was obtained by repeatedly applying and baking a varnish prepared by adding and dissolving 100 parts of varnish (manufactured by Illinois) several times. Example 6 100 parts of ladder-type silicone oligomer (GR-100, manufactured by Owens-Illinois, USA) was applied to 100 parts of resin of polyester varnish (Delacoat E-220GTI, manufactured by Nitto Denko Corporation) on a copper wire with a diameter of 1.0 mmφ.
The varnish was added, mixed and dissolved several times, and then applied and baked to obtain an insulated wire. Example 7 A ladder-type silicone oligomer (GR-150 Owens-Illinois, USA) was applied to 100 parts of polyester imide varnish (Airimitsu 40H, manufactured by Nippon Schenectaday Co., Ltd.) on a copper wire with a diameter of 1.0 mmφ.
A varnish prepared by adding 100 parts of varnish (manufactured by Co., Ltd.), mixed and dissolved, was applied and baked several times to obtain an insulated wire. Example 8 Polyamide varnish (HI
−405−30 Ladder type silicone oligomer (GR650) per 100 parts of resin (manufactured by Hitachi Chemical)
A varnish prepared by adding and melting 100 parts of varnish (manufactured by Owens-Illinois, USA) was applied and baked several times to obtain an insulated wire. Table 1 shows the characteristics of the insulated wires obtained in each of the above Examples and Comparative Examples.
【表】【table】
【表】【table】