JPH05279537A - Methacrylic resin molding composition - Google Patents
Methacrylic resin molding compositionInfo
- Publication number
- JPH05279537A JPH05279537A JP4080708A JP8070892A JPH05279537A JP H05279537 A JPH05279537 A JP H05279537A JP 4080708 A JP4080708 A JP 4080708A JP 8070892 A JP8070892 A JP 8070892A JP H05279537 A JPH05279537 A JP H05279537A
- Authority
- JP
- Japan
- Prior art keywords
- acid amide
- fatty acid
- methyl methacrylate
- higher fatty
- methacrylic resin
- 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
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、加工性に優れたメタク
リル系樹脂組成物に関するものである。特に、金型を用
いた成形加工時の離型性に優れたメタクリル系樹脂組成
物に関する物である。FIELD OF THE INVENTION The present invention relates to a methacrylic resin composition having excellent processability. In particular, the present invention relates to a methacrylic resin composition having excellent mold releasability at the time of molding using a mold.
【０００２】[0002]
【従来の技術】メタクリル系樹脂は、本来の特性の優れ
た透明性、耐候性、良好な機械的性質を生かして、メー
ターカバー等の自動車部品、光ディスク、レンズ等の光
学部品、電灯カバー等の照明部品等に使用されている。
これらの成形品は一般に射出成形、射出圧縮成形等で得
られているが、光学レンズや光ディスクのような精密金
型成形においては、成形品と金型面との密着性が極めて
高くなるために型離れ不良が発生し、生産性を低下させ
る結果となっている。BACKGROUND OF THE INVENTION Methacrylic resins are used in automobile parts such as meter covers, optical parts such as optical discs and lenses, and electric lamp covers, etc. by taking advantage of their original excellent transparency, weather resistance and good mechanical properties. Used for lighting parts.
These molded products are generally obtained by injection molding, injection compression molding, etc., but in precision mold molding such as optical lenses and optical disks, the adhesion between the molded product and the mold surface becomes extremely high. Mold release failure occurs, resulting in a decrease in productivity.
【０００３】そこでメタクリル樹脂に各種離型剤を含有
させることが提案されている。例えば、特開昭61-73754
号公報には、メタクリル系樹脂に、多価アルコール、高
級脂肪酸エステル、高級アルコール、高級脂肪酸、高級
脂肪酸アミド、高級脂肪酸金属塩を添加した樹脂組成物
が提案されている。Therefore, it has been proposed to add various release agents to the methacrylic resin. For example, JP-A-61-73754
The publication discloses a resin composition in which a polyhydric alcohol, a higher fatty acid ester, a higher alcohol, a higher fatty acid, a higher fatty acid amide, and a higher fatty acid metal salt are added to a methacrylic resin.
【０００４】[0004]
【発明が解決しようとする課題】しかしながらこれらの
樹脂組成物での射出成形を行った場合、ある程度の離型
性能は認められるものの未だ充分でない。その上添加さ
れている離型剤やその他の添加剤が樹脂表面に移行し
て、金型表面あるいは成形品表面を汚したり、成形品の
着色をもたらすなど成形品の商品価値を著しく低下させ
る。However, when injection molding is performed using these resin compositions, some degree of mold release performance is recognized, but it is still insufficient. In addition, the release agent and other additives added to the resin migrate to the surface of the resin to stain the surface of the mold or the surface of the molded product and to color the molded product, thereby significantly reducing the commercial value of the molded product.
【０００５】本発明は、従来の離型剤のもつ欠点を克服
し、より少ない配合量によって優れた離型効果を発揮す
るメタクリル系樹脂組成物を提供する。The present invention provides a methacrylic resin composition which overcomes the drawbacks of conventional mold release agents and exhibits an excellent mold release effect with a smaller amount.
【０００６】[0006]
【課題を解決するための手段】本発明はメタクリル酸メ
チル系重合体１００重量部に、炭素数１０〜２２の高級
脂肪酸アミドと炭素数１０〜２２の飽和脂肪族アルコー
ルを重量比１０／９０〜９０／１０で０．０２〜０．５
重量部を含有してなる成形用メタクリル系樹脂組成物に
関するものである。According to the present invention, 100 parts by weight of a methyl methacrylate polymer is added with a higher fatty acid amide having 10 to 22 carbon atoms and a saturated aliphatic alcohol having 10 to 22 carbon atoms in a weight ratio of 10/90 to. 0.02-0.5 at 90/10
The present invention relates to a methacrylic resin composition for molding which contains parts by weight.
【０００７】本発明でいうメタクリル酸メチル系重合体
とは、メタクリル酸メチル単独重合体、またはメタクリ
ル酸メチルと２０重量％以下のアクリル酸エステルもし
くはメタクリル酸エステル、アクリル酸、メタクリル
酸、スチレン、アクリロニトリルあるいは、ジエン系ゴ
ムやグルタル酸無水物、グルタルイミドなどとの共重合
体をいう。なお、アクリル酸エステルとしてはアクリル
酸メチル、アクリル酸エチル、アクリル酸ブチルなど、
メタクリル酸エステルとしてはメタクリル酸エチル、メ
タクリル酸ブチル、メタクリル酸シクロヘキシルなどで
ある。The term "methyl methacrylate polymer" as used in the present invention means a methyl methacrylate homopolymer, or methyl methacrylate and 20% by weight or less of acrylic acid ester or methacrylic acid ester, acrylic acid, methacrylic acid, styrene, acrylonitrile. Alternatively, it means a copolymer with a diene rubber, glutaric anhydride, glutarimide, or the like. As the acrylic ester, methyl acrylate, ethyl acrylate, butyl acrylate, etc.,
Examples of the methacrylic acid ester include ethyl methacrylate, butyl methacrylate and cyclohexyl methacrylate.
【０００８】本発明の炭素数１０〜２２の高級脂肪酸ア
ミドとは、例えばラウリン酸アミド、パルミチン酸アミ
ド、ステアリン酸アミド、オレイン酸アミド、エルカ酸
アミド、Ｎ−オレイルステアロアミドなどがあげられ
る。Examples of the higher fatty acid amide having 10 to 22 carbon atoms of the present invention include lauric acid amide, palmitic acid amide, stearic acid amide, oleic acid amide, erucic acid amide and N-oleyl stearoamide.
【０００９】該高級脂肪酸アミドの炭素数が１０未満の
ものは、揮発性が高く成形時に揮散して充分な離型効果
が得られない。一方炭素数が２２を越えるものは、メタ
アクリル酸メチル系重合体との相溶性が小さいため、樹
脂表面に出易く、金型汚れ、成形品汚れの原因となり好
ましくない。If the higher fatty acid amide has less than 10 carbon atoms, it has a high volatility and is volatilized during molding, and a sufficient releasing effect cannot be obtained. On the other hand, those having more than 22 carbon atoms are not preferable because they have low compatibility with the methyl methacrylate-based polymer and are likely to appear on the resin surface, causing mold stains and molded product stains.
【００１０】本発明の、炭素数１０〜２２の飽和脂肪族
アルコールとしては、例えばラウリルアルコール、ミリ
スチルアルコール、セチルアルコール、ステアリルアル
コール、イソステアリルアルコール、ベヘニルアルコー
ルなどが挙げられる。Examples of the saturated aliphatic alcohol having 10 to 22 carbon atoms of the present invention include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol and behenyl alcohol.
【００１１】該飽和脂肪族アルコールの炭素数が１０未
満のものは、揮発性が高く成形時に揮散して充分な離型
効果が得られない。一方炭素数が２２をこえるものは、
メタアクリル酸メチル系重合体との相溶性が小さいた
め、樹脂表面に出易く、金型汚れ、成形品汚れの原因と
なり好ましくない。When the saturated aliphatic alcohol has less than 10 carbon atoms, it has a high volatility and is volatilized during molding, so that a sufficient releasing effect cannot be obtained. On the other hand, if the carbon number exceeds 22,
Since it has a low compatibility with the methyl methacrylate polymer, it tends to appear on the resin surface, causing mold stains and molded product stains.
【００１２】本発明においては、該高級脂肪酸アミド
と、該飽和脂肪族アルコールは、１０／９０〜９０／１
０、好ましくは、２５／７５〜７５／２５の比率で用い
ることにより、顕著な相乗効果が現われる。この比率の
範囲内で、使用されるメタアクリル酸メチル系重合体の
組成、分子量、流動性などに応じて選択する。該高級脂
肪酸アミドが過多だと成形品の着色をもたらし好ましく
ない。In the present invention, the higher fatty acid amide and the saturated aliphatic alcohol are 10/90 to 90/1.
When used in a ratio of 0, preferably 25/75 to 75/25, a remarkable synergistic effect is exhibited. Within the range of this ratio, it is selected according to the composition, molecular weight, fluidity, etc. of the methyl methacrylate polymer used. If the amount of the higher fatty acid amide is too large, the molded article is colored, which is not preferable.
【００１３】該高級脂肪酸アミドと該飽和脂肪族アルコ
ールの合計量は、メタクリル酸メチル系重合体１００重
量部当り０．０２〜０．５重量部、好ましくは、０．０
５〜０．２重量部である。これらの合計量が０．０２重
量部未満の場合には、離型性能が不足し、成形品表面層
が剥離したり、割れ易くなる。一方添加量が０．５重量
部を越えた場合には、成形品の着色をもたらし、また余
剰の離型剤が金型面に付着し、金型が汚れ、汚染された
成形品となり好ましくない。The total amount of the higher fatty acid amide and the saturated aliphatic alcohol is 0.02 to 0.5 parts by weight, preferably 0.0 to 100 parts by weight of the methyl methacrylate polymer.
5 to 0.2 parts by weight. If the total amount of these is less than 0.02 parts by weight, the release performance is insufficient, and the surface layer of the molded product is likely to peel off or crack. On the other hand, if the addition amount exceeds 0.5 parts by weight, the molded product is colored, and the surplus mold release agent adheres to the mold surface, resulting in a dirty and contaminated molded product, which is not preferable. .
【００１４】本発明で用いられるメタクリル酸メチル系
重合体に、該高級脂肪酸アミド、該飽和脂肪族アルコー
ルを含ませて、組成物とするには、周知の方法を用いる
ことができる。例えば、各成分を、溶融状態で混練する
方法があり、該溶融混練は、一般的に使用されている一
軸または二軸の押出機、各種のニーダー等の混練装置を
用いる方法のみならず、射出成形や押出成形のごとく溶
融加工操作中に直接混練する方法がある。A well-known method can be used to prepare the composition by incorporating the higher fatty acid amide and the saturated aliphatic alcohol into the methyl methacrylate polymer used in the present invention. For example, there is a method of kneading each component in a molten state, and the melt kneading is not limited to a method using a commonly used kneading device such as a single-screw or twin-screw extruder, various kneaders, and injection. There is a method of directly kneading during a melt processing operation such as molding and extrusion molding.
【００１５】又、メタクリル酸メチルを主成分とする単
量体、あるいはシロップに、該高級脂肪酸アミドと該飽
和脂肪族アルコールを添加混合し、これを塊状重合法、
懸濁重合法、乳化重合法、溶液重合法など周知の方法で
重合する方法がある。Also, the higher fatty acid amide and the saturated aliphatic alcohol are added to and mixed with a monomer or syrup containing methyl methacrylate as a main component, and the mixture is subjected to a bulk polymerization method,
There are known methods such as suspension polymerization method, emulsion polymerization method and solution polymerization method.
【００１６】なお、本発明のメタクリル系樹脂組成物に
は周知のヒンダードフェノール系酸化防止剤、リン系酸
化防止剤及びイオウ系酸化防止剤等の酸化防止剤、紫外
線吸収剤やヒンダードアミン型光安定剤等の耐候剤、難
燃剤、着色剤、顔料等を添加することも出来るし、さら
に目的によってはガラス繊維等の強化繊維、無機充填剤
等も配合することも出来る。The methacrylic resin composition of the present invention contains antioxidants such as well-known hindered phenol antioxidants, phosphorus antioxidants and sulfur antioxidants, ultraviolet absorbers and hindered amine type photostabilizers. It is also possible to add weathering agents such as agents, flame retardants, colorants, pigments, etc., and depending on the purpose, reinforcing fibers such as glass fibers, inorganic fillers, etc. may also be added.
【００１７】[0017]
【発明の効果】本発明のメタクリル系樹脂組成物は、従
来のメタクリル系樹脂に比べ、金型を用いて成形した際
に、優れた離型性を有し、かつメタクリル系樹脂本来の
優れた透明性、耐候性も有している。 従って、メータ
ーカバー等の自動車部品、ビデオディスク、レンズ等の
光学部品、照明部品、ＯＡ機器部品等の複雑な形状の成
形品を金型を用いて成形するのに適している。EFFECTS OF THE INVENTION The methacrylic resin composition of the present invention has excellent releasability when molded by using a mold and is excellent in original methacrylic resin as compared with the conventional methacrylic resin. It also has transparency and weather resistance. Therefore, it is suitable for molding a molded product having a complicated shape such as an automobile part such as a meter cover, an optical part such as a video disk and a lens, an illuminating part, and an OA equipment part using a mold.
【００１８】[0018]
【実施例】以下実施例によって本発明をさらに説明す
る。なお、実施例において用いた評価方法は次の通り。 ・離型性：容量１３オンスの射出成形機（各機製作所
製、Ｍ−１４０ＳＪ型）に、２５mm×７６．５mm×３．
２mmのＡＳＴＭ試験片金型を取りつけ、成形温度２６０
℃、射出圧力８０kg／cm2 G 、金型温度６０℃の条件
下、６０秒サイクルで、連続４０回試験片を作成した。
この時の成形品のヒビ、ワレ等の不良品の発生した個数
の比率で表わした。 ・汚染性：前記の成形を終えた直後の金型表面（鏡面
部）の曇りの状態を目視観察して曇りが見られないもの
を○、曇りが有るものを×とした。 ・外観；成形品の汚れ、着色状況を見視で観察した。The present invention will be further described with reference to the following examples. The evaluation methods used in the examples are as follows. -Releasability: 25 mm x 76.5 mm x 3 in an injection molding machine (M-140SJ type manufactured by each machine manufacturer) with a capacity of 13 ounces.
Attach a 2 mm ASTM test piece mold, molding temperature 260
° C., injection pressure 80 kg / cm 2 G, under the conditions of mold temperature 60 ° C., 60 seconds cycle, have created a continuous 40 times the test piece.
It was expressed by the ratio of the number of defective products such as cracks and cracks in the molded product at this time. Stainability: Immediately after completion of the above-mentioned molding, the state of cloudiness on the surface of the mold (mirror surface part) was visually observed, and when no cloudiness was observed, it was rated as O, and when there was cloudiness, was rated as X. -Appearance: The stains and coloring of the molded product were visually observed.
【００１９】実施例１ 懸濁重合で得られた粒状メタクリル樹脂、（スミペック
スB LO、住友化学工業（株）製）１００部と、ステアリ
ン酸アミド０．０２５部及びステアリルアルコール０．
０２５部とを、ヘンシェル型ミキサーで混合後、スクリ
ュー径４０mmのベント型押出機を用いてペレット化し
た。該ペレットを評価した。得られた結果を表１に示
す。Example 1 100 parts of granular methacrylic resin obtained by suspension polymerization (SUMIPEX B LO, manufactured by Sumitomo Chemical Co., Ltd.), 0.025 part of stearic acid amide and 0.10 of stearyl alcohol.
After mixing 025 parts with a Henschel type mixer, pelletization was performed using a vent type extruder having a screw diameter of 40 mm. The pellets were evaluated. The results obtained are shown in Table 1.
【００２０】実施例２〜５、比較例１〜４ ステアリン酸アミド及びステアリルアルコールの添加量
を表１に示すように変更した以外は、実施例１と同様に
行った。得られた結果を表１に示す。Examples 2 to 5, Comparative Examples 1 to 4 Example 1 was repeated except that the amounts of stearamide and stearyl alcohol were changed as shown in Table 1. The results obtained are shown in Table 1.
【００２１】実施例６ ステアリン酸アミドに代えて、パルミチン酸アミドとし
た以外は、実施例２と同様に行った。得られた結果を表
１に示す。Example 6 Example 2 was repeated except that palmitic acid amide was used instead of stearic acid amide. The results obtained are shown in Table 1.
【００２２】実施例７ ステアリルアルコールに代えて、セチルアルコールとし
た以外は、実施例２と同様に行った。得られた結果を表
１に示す。Example 7 Example 2 was repeated except that cetyl alcohol was used instead of stearyl alcohol. The results obtained are shown in Table 1.
【００２３】[0023]
【表１】 [Table 1]
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｇ１１Ｂ 7/24 ５２６ Ｂ 7215−5Ｄ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI technical display location G11B 7/24 526 B 7215-5D
Claims (1)
に、炭素数１０〜２２の高級脂肪酸アミドと炭素数１０
〜２２の飽和脂肪族アルコールを重量比１０／９０〜９
０／１０で、０．０２〜０．５重量部を含有してなる成
形用メタクリル系樹脂組成物。1. A higher fatty acid amide having 10 to 22 carbon atoms and 10 carbon atoms in 100 parts by weight of a methyl methacrylate polymer.
~ 22 saturated aliphatic alcohol in a weight ratio of 10 / 90-9
A methacrylic resin composition for molding, which is 0/10 and contains 0.02 to 0.5 part by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4080708A JPH05279537A (en) | 1992-04-02 | 1992-04-02 | Methacrylic resin molding composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4080708A JPH05279537A (en) | 1992-04-02 | 1992-04-02 | Methacrylic resin molding composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05279537A true JPH05279537A (en) | 1993-10-26 |
Family
ID=13725835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4080708A Pending JPH05279537A (en) | 1992-04-02 | 1992-04-02 | Methacrylic resin molding composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05279537A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009125764A1 (en) | 2008-04-08 | 2009-10-15 | 住友化学株式会社 | Methacrylic resin composition for hot plate melt-bonding, use of the same for hot plate melt-bonding, and melt-bonding method |
| WO2009125768A1 (en) | 2008-04-08 | 2009-10-15 | 住友化学株式会社 | Methacrylic resin composition for hot plate melt-bonding, use of the same for hot plate melt-bonding, and melt-bonding method |
| WO2009125766A1 (en) | 2008-04-08 | 2009-10-15 | 住友化学株式会社 | Methacrylic resin composition for hot plate melt-bonding, use of the same for hot plate melt-bonding, and melt-bonding method |
| EP2415835A4 (en) * | 2009-04-02 | 2013-10-02 | Sumitomo Chemical Co | Methacrylic resin composition, molded object, and manufacturing method therefor |
| WO2018142164A1 (en) * | 2017-02-03 | 2018-08-09 | Lucite International Uk Limited | Polymer composition |
| RU2772428C2 (en) * | 2018-02-05 | 2022-05-19 | МИЦУБИСИ КЕМИКАЛ ЮКей ЛИМИТЕД | Polymer composition |
-
1992
- 1992-04-02 JP JP4080708A patent/JPH05279537A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009125764A1 (en) | 2008-04-08 | 2009-10-15 | 住友化学株式会社 | Methacrylic resin composition for hot plate melt-bonding, use of the same for hot plate melt-bonding, and melt-bonding method |
| WO2009125768A1 (en) | 2008-04-08 | 2009-10-15 | 住友化学株式会社 | Methacrylic resin composition for hot plate melt-bonding, use of the same for hot plate melt-bonding, and melt-bonding method |
| WO2009125766A1 (en) | 2008-04-08 | 2009-10-15 | 住友化学株式会社 | Methacrylic resin composition for hot plate melt-bonding, use of the same for hot plate melt-bonding, and melt-bonding method |
| KR20160025036A (en) | 2008-04-08 | 2016-03-07 | 스미또모 가가꾸 가부시끼가이샤 | Methacrylic resin composition for hot plate melt-bonding, use of the same for hot plate melt-bonding, and melt-bonding method |
| EP2415835A4 (en) * | 2009-04-02 | 2013-10-02 | Sumitomo Chemical Co | Methacrylic resin composition, molded object, and manufacturing method therefor |
| WO2018142164A1 (en) * | 2017-02-03 | 2018-08-09 | Lucite International Uk Limited | Polymer composition |
| US11370907B2 (en) | 2017-02-03 | 2022-06-28 | Mitsubishi Chemical UK Limited | Polymer composition |
| RU2772428C2 (en) * | 2018-02-05 | 2022-05-19 | МИЦУБИСИ КЕМИКАЛ ЮКей ЛИМИТЕД | Polymer composition |
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