JPH0566403B2 - - Google Patents
Info
- Publication number
- JPH0566403B2 JPH0566403B2 JP60006329A JP632985A JPH0566403B2 JP H0566403 B2 JPH0566403 B2 JP H0566403B2 JP 60006329 A JP60006329 A JP 60006329A JP 632985 A JP632985 A JP 632985A JP H0566403 B2 JPH0566403 B2 JP H0566403B2
- Authority
- JP
- Japan
- Prior art keywords
- polyester elastomer
- retardant
- heat
- flame
- molecular weight
- 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.)
- Expired - Fee Related
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Polymerisation Methods In General (AREA)
- Graft Or Block Polymers (AREA)
- Insulated Conductors (AREA)
Description
〔発明の技術分野〕
本発明は難燃ポリエステルエラストマー組成物
の耐熱老化性改良に関する。
〔発明の背景〕
ポリエステルエラストマーは、耐薬品性と柔軟
性を兼ね備えた特長あるポリマーである。
しかし、フツソゴム等に比べると耐熱性が劣る
ため120〜150℃といつた高温で使用する場合には
値段は高いが150℃以上で使用可能なフツソゴム
等を使用せざるをえないのが普通である。
燃焼性のポリマーに難燃剤を添加して難燃化し
たりポリマーを電子線照射して架橋し、耐熱変形
性を改良することができることはよく知られてい
る通りである。
しかし、こうして難燃化したポリエステルエラ
ストマーを架橋しても耐熱老化性能を改良出来な
い限り、高温長時間の使用は、やはり制限され
る。
〔発明の概要〕
本発明者は、こうしたポリエステルエラストマ
ーの欠点を改良すべく種々検討した結果、ポリエ
ステルエラストマーに高分子量ヒンダードフエノ
ール系老化防止剤、塩素系難燃剤、多官能性モノ
マーを添加した組成物を電子線照射して架橋する
ことにより耐熱性に勝れる難燃性のポリエステル
エラストマーが得られることを見出し、本発明を
完成した。
〔発明の具体的説明〕
本発明において、ポリエステルエラストマーと
は、（AB）ｎ型のマルチブロツク共重合体であ
つて、構造式で示すと下記の様に、テレフタル酸
系結晶性ポリエステルハードセグメントと、分子
量600から3000の脂肪族ポリエーテルソフトセグ
メントから構成されたセグメントテツドポリエス
テルである。
ポリエステルエラストマーは、ハードセグメン
トとして以上構造式のポリブチレンテレフタレー
ト以外に、ポリエチレンテレフタレート等のポリ
エステル種を変えたり、また、ソフトセグメント
のポリエーテルをポリエチレングリコール、ポリ
プロピレングリコール等の各種のものを用いたり
分子量を変えたものが用いられる。
多官能性モノマーとして、ジエチレングリコー
ル等のジアクリレート系、エチレングリコールメ
タクリレート、ジプロピレングリコールジメタク
リレート等のジメタクリレート系、トリメチロー
ルエタントリアクリレート、トリメチロールプロ
パントリアクリレート等のトリアクリレート系、
トリメチロールプロパントリメタクリレート、ト
リメチロールエタントリメタクリレート等のトリ
メタクリレート系、トリアリルシアヌレート、ト
リアリルイソシアヌレート、ジアリルシアヌレー
ト、ジアリルフタレートなどが挙げられる。
本発明において、上記多官能性モノマーを配合
する理由は、ポリエステルエラストマーは電子線
等の照射によつて架橋はするが、その架橋効率が
ポリエチレン等のポリオレフインに比べ著しく低
いため、多官能性モノマーを配合せずに、耐熱性
を照射架橋で付与すると、ポリマーの分解により
耐熱老化性が悪くなる。
〔実施例〕
第１表〜第３表の配合で厚さ１mmのシートを作
成し、電子線照射で架橋した後、160℃７日老化
後の伸長率を測定し、第４表に示したような結果
を得た。
例えば、VG規格では老化後の伸び200％以上
が合格とされており、この基準だと高分子量のヒ
ンダードフエノール系老化防止剤、塩素系環状有
機化合物、多官能性モノマーを添加した実施例の
１〜６配合のみ合格であつた。
〔発明の効果〕
本発明は、ポリエステルエラストマーの特長で
ある優れた耐薬品性と柔軟性に加え、更に耐熱性
及び老化性を改良したポリエステルエラストマー
組成物を提供するもので、その用途は、チユーブ
シート、テープ等の成形品、電線ケーブルの被覆
等、特に耐熱性及び耐老化性を必要とするものに
適用することができるものである。
TECHNICAL FIELD OF THE INVENTION The present invention relates to improving the heat aging resistance of flame-retardant polyester elastomer compositions. [Background of the Invention] Polyester elastomers are unique polymers that have both chemical resistance and flexibility. However, since it has inferior heat resistance compared to soft rubber, etc., when used at high temperatures such as 120 to 150 degrees Celsius, it is usually necessary to use soft rubber, etc., which can be used at temperatures above 150 degrees Celsius, although it is more expensive. be. It is well known that heat deformation resistance can be improved by adding a flame retardant to a combustible polymer to make it flame retardant, or by crosslinking the polymer by irradiating it with an electron beam. However, even if the flame-retardant polyester elastomer is crosslinked, its use at high temperatures and for long periods of time is still limited unless its heat aging resistance can be improved. [Summary of the Invention] As a result of various studies to improve the drawbacks of polyester elastomers, the present inventor has developed a composition in which a high molecular weight hindered phenolic anti-aging agent, a chlorine flame retardant, and a polyfunctional monomer are added to a polyester elastomer. The present invention was completed based on the discovery that a flame-retardant polyester elastomer with excellent heat resistance can be obtained by crosslinking a material by irradiating it with electron beams. [Specific Description of the Invention] In the present invention, the polyester elastomer is an (AB)n-type multi-block copolymer, and the structural formula is as shown below, consisting of a terephthalic acid-based crystalline polyester hard segment and , a segmented polyester composed of aliphatic polyether soft segments with a molecular weight of 600 to 3,000. Polyester elastomers can be made by using different types of polyester such as polyethylene terephthalate in addition to the polybutylene terephthalate shown in the above structural formula for the hard segment, or by using various types of polyether such as polyethylene glycol or polypropylene glycol for the soft segment, or by changing the molecular weight. The modified version is used. As polyfunctional monomers, diacrylates such as diethylene glycol, dimethacrylates such as ethylene glycol methacrylate and dipropylene glycol dimethacrylate, triacrylates such as trimethylolethane triacrylate and trimethylolpropane triacrylate,
Examples include trimethacrylates such as trimethylolpropane trimethacrylate and trimethylolethane trimethacrylate, triallyl cyanurate, triallyl isocyanurate, diallyl cyanurate, and diallyl phthalate. In the present invention, the reason why the polyfunctional monomer is blended is that although polyester elastomers can be crosslinked by irradiation with electron beams, the crosslinking efficiency is significantly lower than that of polyolefins such as polyethylene. If heat resistance is imparted by irradiation crosslinking without blending, heat aging resistance will deteriorate due to decomposition of the polymer. [Example] A sheet with a thickness of 1 mm was created using the formulations shown in Tables 1 to 3, and after crosslinking with electron beam irradiation, the elongation rate was measured after aging at 160°C for 7 days, and the results are shown in Table 4. I got similar results. For example, in the VG standard, elongation after aging of 200% or more is considered to be a pass, and according to this standard, examples containing a high molecular weight hindered phenol anti-aging agent, a chlorine-based cyclic organic compound, and a polyfunctional monomer. Only formulations 1 to 6 passed. [Effects of the Invention] The present invention provides a polyester elastomer composition that has improved heat resistance and aging resistance in addition to the excellent chemical resistance and flexibility that are the characteristics of polyester elastomers. It can be applied to molded products such as sheets and tapes, and coverings for electric wires and cables, which particularly require heat resistance and aging resistance.
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
Claims (1)
の高分子量ヒンダードフエノール系老化防止剤と
塩素系難燃剤及び多官能性モノマーを添加したこ
とを特徴とする耐熱性難燃ポリエステルエラスト
マー組成物。 ２ 塩素系難燃剤が塩素含有量60％以上の環状有
機化合物であるところの特許請求の範囲第１項記
載の耐熱性難燃ポリエステルエラストマー組成
物。[Scope of Claims] 1. A heat-resistant flame-retardant polyester elastomer composition, characterized in that a high molecular weight hindered phenol antioxidant having a molecular weight of 500 or more, a chlorine flame retardant, and a polyfunctional monomer are added to a polyester elastomer. 2. The heat-resistant flame-retardant polyester elastomer composition according to claim 1, wherein the chlorine-based flame retardant is a cyclic organic compound having a chlorine content of 60% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60006329A JPS61163953A (en) | 1985-01-16 | 1985-01-16 | Heat-resistant, flame-retardant polyester elastomer composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60006329A JPS61163953A (en) | 1985-01-16 | 1985-01-16 | Heat-resistant, flame-retardant polyester elastomer composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61163953A JPS61163953A (en) | 1986-07-24 |
| JPH0566403B2 true JPH0566403B2 (en) | 1993-09-21 |
Family
ID=11635322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60006329A Granted JPS61163953A (en) | 1985-01-16 | 1985-01-16 | Heat-resistant, flame-retardant polyester elastomer composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61163953A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH075824B2 (en) * | 1987-04-01 | 1995-01-25 | 住友電気工業株式会社 | Flame-retardant polyester elastomer composition |
| JP2842456B2 (en) * | 1991-05-16 | 1999-01-06 | 株式会社フジクラ | Insulated wire |
| NL9101685A (en) * | 1991-10-07 | 1993-05-03 | Gen Electric | Polymer mixture with polyester and copolyester ester block copolymer; ARTICLES MADE THEREFROM. |
| JP2001200214A (en) * | 2000-01-19 | 2001-07-24 | Sony Chem Corp | Adhesive |
-
1985
- 1985-01-16 JP JP60006329A patent/JPS61163953A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61163953A (en) | 1986-07-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |