JPS59115338A - Expandable resin composition - Google Patents
Expandable resin compositionInfo
- Publication number
- JPS59115338A JPS59115338A JP22297382A JP22297382A JPS59115338A JP S59115338 A JPS59115338 A JP S59115338A JP 22297382 A JP22297382 A JP 22297382A JP 22297382 A JP22297382 A JP 22297382A JP S59115338 A JPS59115338 A JP S59115338A
- Authority
- JP
- Japan
- Prior art keywords
- acrylic acid
- resin composition
- foam
- polyolefin
- skin layer
- 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.)
- Pending
Links
Abstract
Description
【発明の詳細な説明】 本発明は発泡性樹脂組成物に関する。[Detailed description of the invention] The present invention relates to a foamable resin composition.
熱可塑性樹脂の発泡体は事務機、電気機器、輸送機の内
装材、構造材、クッション材として多くの分野で使用さ
れている。Thermoplastic resin foams are used in many fields as interior materials, structural materials, and cushioning materials for office machines, electrical equipment, and transportation aircraft.
コレらの発泡体の製造においては、アゾビスフォルムア
ミド、 Ｎ、Ｎ’−ジニトロソペンタメチレンテトラ
ミン、ベンゼンスルホニルヒドラジドのような熱可塑性
樹脂の成形温度で分解して窒素、炭酸ガス等を放出する
化学発泡剤が一般に使用される。化学発泡剤は各種市販
されており、ガラス繊維、充填剤、難燃剤、顔料等と併
用することが出来る。しかし、化学発泡剤はガス化した
後に、低分子量の固体分解生成物が使用化学発泡剤の６
０〜８０％も残シ、これらの多くが窒素や硫黄を含む化
合物であるため、得られる発泡体の耐熱性。In the production of Kore et al.'s foam, thermoplastic resins such as azobisformamide, N,N'-dinitrosopentamethylenetetramine, and benzenesulfonyl hydrazide are decomposed at the molding temperature to release nitrogen, carbon dioxide, etc. Chemical blowing agents are commonly used. Various chemical blowing agents are commercially available and can be used in combination with glass fibers, fillers, flame retardants, pigments, etc. However, after chemical blowing agents are gasified, low molecular weight solid decomposition products are
Since most of these are compounds containing nitrogen and sulfur, the heat resistance of the resulting foam is poor.
耐候性７着色等が問題となる。Weather resistance 7 Coloring etc. are a problem.
化学発泡剤を使用しない方法としては、熱可塑性樹脂の
射出成形等の加圧時に高圧で窒素ガス。A method that does not use chemical blowing agents is to use nitrogen gas under high pressure when pressurizing thermoplastic resin injection molding.
炭酸カス等を圧入し、金型内で脱圧して発泡体を得るの
か一般的である。しかし、この方法では発？包用のカス
を圧入するだめの特別の装置か必要であり、操作も複雑
となる。It is common to press carbonate scum, etc., and release the pressure inside the mold to obtain a foam. But does this method work? A special device is required to press in the waste for packaging, and the operation is complicated.
本発明は、化学発泡剤及び特別の装置を使用することな
く、気泡か均一に分散し、スキン層を有する発泡体に成
形できる発泡性樹脂組成物を提供する。The present invention provides a foamable resin composition in which cells are uniformly dispersed and can be molded into a foam having a skin layer without using a chemical foaming agent or special equipment.
即ち２本発明は。That is, two aspects of the present invention are as follows.
（ａ）５〜９５重量係のポリオレフィン、及び（ｂ）ｓ
ｚ；〜５重量係のイミド化されたアクリル酸系重合体（
但し、（ａ）と（ｂ）との合計で１００重量係）
からなる発泡性樹脂組成物である。(a) a polyolefin having a weight ratio of 5 to 95; and (b) s
z; ~5 weight ratio imidized acrylic acid polymer (
However, the total weight of (a) and (b) is 100%).
本発明の発泡性樹脂組成物は溶融するだけで。The foamable resin composition of the present invention only needs to be melted.
気泡が均一に分散し、かつ表面にスキン層を有する発泡
体に転化される。The cells are uniformly dispersed and converted into a foam with a skin layer on the surface.
本発明におけるポリオレフィンの具体例としては、エチ
レン、プロピレン、ブテンなどの単独重合体あるいは共
重合体、さらにこれらの混合物が挙げられる。Specific examples of the polyolefin in the present invention include homopolymers or copolymers of ethylene, propylene, butene, and mixtures thereof.
本発明におけるイミド化されたアクリル酸系重合体とは
、アクリル酸、メタクリル酸、これらのエステルなどの
アクリル酸系モノマーから誘導される単位を含む重合体
のイミド化物である。アクリル酸系重合体には、アクリ
ル酸系モノマーと。The imidized acrylic acid polymer in the present invention is an imidized product of a polymer containing units derived from acrylic acid monomers such as acrylic acid, methacrylic acid, and esters thereof. Acrylic acid polymers include acrylic acid monomers.
スチレン、アクリロニトリル、ブタジェンなどのエチレ
ン性不飽和モノマーとの共重合体が包含される。共重合
体の場合、アクリル酸系モノマーから誘導された単位が
２０重量％以上含まれていることが好ましい。Copolymers with ethylenically unsaturated monomers such as styrene, acrylonitrile, butadiene are included. In the case of a copolymer, it is preferable that 20% by weight or more of units derived from acrylic acid monomers are contained.
イミド化されたアクリル酸系重合体の具体例としては、
ポリメタクリル酸メチル、ポリメタクリル酸メチル／ア
クリル酸エチル共重合体、ポリメタクリル酸メチル／ア
クリル酸共重合体等をＵＳＰ ４，２４６．ろ７４（特
開昭５２−６６９８９号）に示されるアンモニア、第一
アミンでイミド化して得られるポリグルタルイミドが挙
げられる。Specific examples of imidized acrylic acid polymers include:
Polymethyl methacrylate, polymethyl methacrylate/ethyl acrylate copolymer, polymethyl methacrylate/acrylic acid copolymer, etc. USP 4,246. Examples include polyglutarimide obtained by imidization with ammonia and primary amines shown in 74 (Japanese Patent Application Laid-Open No. 52-66989).
ポリオレフィンの使用量は５〜９５重量係、好ましくは
１０〜９０重量係、イミド化されたアクリル酸系重合体
の使用量は５〜９５重量％、好ましくは１０〜９００〜
９０重量％この範囲からはずれると均一な発泡体を得る
ことが出来ない。The amount of polyolefin used is 5 to 95% by weight, preferably 10 to 90% by weight, and the amount of imidized acrylic acid polymer used is 5 to 95% by weight, preferably 10 to 900% by weight.
If the amount is outside this range of 90% by weight, a uniform foam cannot be obtained.
ポリオレフィンとイミド化されたアクリル酸系重合体と
を混合する方法としては２両者をトライブレンドする方
法、トライブレンド後、単軸または多軸押出機を用いて
溶融混合する方法などが採用される。As a method for mixing a polyolefin and an imidized acrylic acid polymer, a method of tri-blending the two, a method of tri-blending and then melt-mixing using a single-screw or multi-screw extruder, etc. are adopted.
こうして得られる発泡性樹脂組成物を、押出成形、射出
成形等の公知の成形法で成形することによって２発泡体
が得られる。成形温度は２通常２１０〜３５０°Ｃ１好
ましくは２ろＯ〜ろ００°Ｃである。Two foams are obtained by molding the foamable resin composition thus obtained by a known molding method such as extrusion molding or injection molding. The molding temperature is usually 210-350°C, preferably 200-000°C.
本発明の発泡性樹脂組成物は、目的に応じて。The foamable resin composition of the present invention can be used depending on the purpose.
染料、顔料、充填剤、核剤、繊維状の金属、有機及び無
機物、可塑剤、滑剤、カップリング剤、耐熱剤、耐候剤
および難燃剤などを含有することができる。さらに９本
発明の発泡性樹脂組成物は。It can contain dyes, pigments, fillers, nucleating agents, fibrous metals, organic and inorganic substances, plasticizers, lubricants, coupling agents, heat resistant agents, weathering agents, flame retardants, and the like. Furthermore, the foamable resin composition of the present invention is as follows.
ＵＳＰ４２１７４２４（特開昭５５−１５２７４０号）
及びＵＳ、Ｐ４２５４２３２（特開昭５５−８．０４５
．９号）に記載のアクリル基準多段重合体他のエラスト
マーを含むことができる。USP4217424 (Unexamined Japanese Patent Publication No. 55-152740)
and US, P4254232 (Japanese Unexamined Patent Publication No. 55-8.045
．． The acrylic-based multistage polymer described in No. 9) and other elastomers may be included.
つぎに実施例を示す。Next, examples will be shown.
実施例１
ポリプロピレン（Ｊろ０９Ｇ、宇部興産製）７０ ｗｔ
％と、イミド化されたアクリル酸系重合体として、
Ｕ Ｓ Ｐ ４，２４６，３７４ （特開昭５２−６６
９８９号）に従い、ポリメタクリル酸メチルをイミド化
して得られたポリグルタルイミド（イミド化率：８８〜
９２％）己Ｏｗｔ％とをタンブラ−型ミキサーで均一に
トライブレンドした後、二軸押出機（池貝鉄工製、ＰＯ
Ｍ−３０）により２４０〜２５０°Ｃで溶融混練し押出
し、均一に発泡したストランドを得た。更にこのストラ
ンドをペレタイザーによりペレット化した後、８０”ｃ
で４８時間真空乾燥した。得られたベレットを射出成形
機（名機製、５Ｊ−２５Ｂ、２．８オンス）により２４
０〜２５０°Ｃで射出成形した結果・均一に発泡し、ス
キン層を有する発泡構造体が得られた。Example 1 Polypropylene (Jro09G, manufactured by Ube Industries) 70 wt
% and imidized acrylic acid polymer,
USP 4,246,374 (Unexamined Japanese Patent Publication No. 52-66
989), polyglutarimide obtained by imidizing polymethyl methacrylate (imidization rate: 88~
92%) and self-Owt% in a tumbler-type mixer, and then a twin-screw extruder (manufactured by Ikegai Iron Works, PO
M-30) was melt-kneaded and extruded at 240 to 250°C to obtain a uniformly foamed strand. Furthermore, after pelletizing this strand with a pelletizer,
It was vacuum dried for 48 hours. The obtained pellet was molded using an injection molding machine (Meiki, 5J-25B, 2.8 oz.) for 24 hours.
As a result of injection molding at 0 to 250°C, a foamed structure was obtained that was uniformly foamed and had a skin layer.
実施例２
ポリプロピレンに代えてエチレンプロピレンラバー（Ｅ
Ｐ−０２ＰＸ、、ＴＳＲ製）を使用し、エチレンプロピ
レンラバー／ポリグルタルイミドの重量比を７／ろにし
た以外は実施例１を繰返した。Example 2 Ethylene propylene rubber (E
Example 1 was repeated except that P-02PX (manufactured by TSR) was used and the weight ratio of ethylene propylene rubber/polyglutarimide was 7/fil.
分解は殆んど起きず、均一に発泡したストランドが得ら
れた。まだ射出成形した結果、スキン層を有する発泡構
造体が得られた。Almost no decomposition occurred, and a uniformly foamed strand was obtained. Still injection molding resulted in a foamed structure with a skin layer.
実施例６〜４
実施例１で使用したポリプロピレン３０ ｗｔ％と実施
例１で使用したポリグルタルイミド７０ ｗｔ％との組
合せ（実施例ろ）、ポリエチレン（Ｚ３７（１゜宇部興
産製） ５０ ｗｔ係と実施例１で使用したポリグルタ
ルイミド５０ ｗｔ％との組合せ（実施例イ）を使用し
た外は実施例１と同様にトライブレンドを行い、これを
射出成形機（泡様製、５Ｊ−２５Ｂ。Examples 6 to 4 Combination of 30 wt% polypropylene used in Example 1 and 70 wt% polyglutarimide used in Example 1 (Example 1), polyethylene (Z37 (1° manufactured by Ube Industries) 50 wt%) Tri-blending was carried out in the same manner as in Example 1, except that the combination (Example A) of 50 wt% of the polyglutarimide used in Example 1 was used, and the mixture was molded using an injection molding machine (manufactured by Foam, 5J-25B). .
２．８オンス）によシ２４０〜２５０°Ｃで射出成形し
た結果２両実施例とも均一に発泡し、スキン層を有する
発泡体が得られた。As a result of injection molding at 240 to 250° C., both Examples were uniformly foamed, and foams having a skin layer were obtained.
特許出願人 宇部興産株式会社Patent applicant: Ube Industries Co., Ltd.
Claims (1)
９５〜５重量係のイミド化されたアクリル酸系重合体（
但し、（ａ）と（ｂ）との合計で１００重量重量 外らなる発泡性樹脂組成物。[Scope of Claims] (a) a polyolefin having a weight ratio of 5 to 95; and (b)
Imidized acrylic acid polymer with a weight ratio of 95 to 5 (
However, a foamable resin composition in which the total weight of (a) and (b) is less than 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22297382A JPS59115338A (en) | 1982-12-21 | 1982-12-21 | Expandable resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22297382A JPS59115338A (en) | 1982-12-21 | 1982-12-21 | Expandable resin composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59115338A true JPS59115338A (en) | 1984-07-03 |
Family
ID=16790787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22297382A Pending JPS59115338A (en) | 1982-12-21 | 1982-12-21 | Expandable resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59115338A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023139194A1 (en) | 2022-01-24 | 2023-07-27 | Röhm Gmbh | Polymer foams based on blends of poly(vinylidene fluoride) and poly(meth)acrylimide |
| WO2023139195A1 (en) | 2022-01-24 | 2023-07-27 | Röhm Gmbh | Polymer foams based on poly(meth)acrylimide |
-
1982
- 1982-12-21 JP JP22297382A patent/JPS59115338A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023139194A1 (en) | 2022-01-24 | 2023-07-27 | Röhm Gmbh | Polymer foams based on blends of poly(vinylidene fluoride) and poly(meth)acrylimide |
| WO2023139195A1 (en) | 2022-01-24 | 2023-07-27 | Röhm Gmbh | Polymer foams based on poly(meth)acrylimide |
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