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JP3569928B2 - Resin composition for coloring thermoplastic resin and molded article - Google Patents
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JP3569928B2 - Resin composition for coloring thermoplastic resin and molded article - Google Patents

Resin composition for coloring thermoplastic resin and molded article Download PDF

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Publication number
JP3569928B2
JP3569928B2 JP19954793A JP19954793A JP3569928B2 JP 3569928 B2 JP3569928 B2 JP 3569928B2 JP 19954793 A JP19954793 A JP 19954793A JP 19954793 A JP19954793 A JP 19954793A JP 3569928 B2 JP3569928 B2 JP 3569928B2
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Prior art keywords
resin
coloring
dispersant
thermoplastic resin
resin composition
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JP19954793A
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JPH0753772A (en
Inventor
正人 大橋
安章 町田
昌史 小出
淳一 鈴木
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Artience Co Ltd
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Toyo Ink Mfg Co Ltd
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Description

【0001】
【産業上の利用分野】
本発明は、熱可塑性樹脂着色用の樹脂組成物に関する。
【0002】
【従来の技術】
従来、ポリオレフィン系樹脂着色用組成物には、顔料と分散剤とを混合した粉末状のドライカラー、常温で液状の分散剤中に顔料を分散させたリキッドカラーまたはペーストカラー、常温で固体の樹脂中に顔料を分散させたペレット状、フレーク状あるいはビーズ状のマスターバッチなどがある。これらの着色用組成物は、用途によって、その特徴を生かして使い分けられているが、これらのうち、取扱いの容易さ、使用時の作業環境保全の面からマスターバッチが好んで用いられている。そして、マスターバッチとして要求される性能も、顔料濃度が高いこと、着色される熱可塑性樹脂の耐熱性や強度などの諸物性に与える影響が小さいことなどと共に、ポリオレフィン系樹脂の成形の精密化、高速化にともない以前にもまして顔料分散性や分配性が求められるようになった。
【0003】
マスターバッチに顔料分散性を付与する分散剤としては、ステアリン酸、ステアリン酸亜鉛、ステアリン酸マグネシウム、ステアリン酸アルミニウム、ステアリン酸カルシウム、エチレンビスアマイド、ポリエチレンワックス、ポリプロピレンワックス、およびこれらの誘導体、酸変性体や酸変性体からなるワックス等の1種または2種以上が一般的に用いられている。しかし、例えば、熱可塑性樹脂を10数ミクロン径で高速紡糸したり、フィルム化するなど高度な顔料分散が求められる場合には、上記分散剤では不充分であった。すなわち、顔料分散不良による紡糸時の糸切れ、溶融紡糸機のフィルターの目詰まり、フィルムでの成形不良などが発生した。これらの問題を解決するために、マスターバッチの加工方法の改良や強力混練機により顔料分散性を向上させる努力が行われてきた。しかし、上記問題を解決するために十分な顔料分散能を発揮するものではなかった。
【0004】
また、従来着色ペレットが使用されてきた大型射出成形分野において、マスターバッチによる着色の増加に伴い、成形品の着色において色ムラやフローマークが問題となってきた。従来より、マスターバッチによる着色が施されてきたブロー成形やフィルム成形では樹脂とマスターバッチの可塑化、混合及び混練は成形機の押出機部分で行われる。射出成形機の場合、この可塑化、混合、混練工程は、スクリューの後退するシリンダー内で行われるが、混練力は押出機に比べ十分ではなく、成形サイクルの短縮、成形樹脂の低粘度化に伴い混練力は小さくなってきており、その結果、成形品の表面に色ムラが発生しやすくなってきた。
【0005】
加えて、着色のコストダウンを目的に推進されてきたマスターバッチの顔料含有率を上げた、高濃度マスターバッチの出現による被着色樹脂へのマスターバッチの添加量の減少化で、この色ムラやフローマークの発生はより起こり易くなってきた。これらの問題は、各種熱可塑性樹脂で認められるが、家電や自動車部品で使用量が増えてきたポリプロピレン系の樹脂で顕著であり、早急な解決が求められてきた。この問題を解決するため、マスターバッチの主要3成分(顔料、分散剤及びベースレジン)のうち、分散剤の含有量を増やしたり、あるいはベースレジンを被着色樹脂の粘度より小さいものを使用するなどマスターバッチの溶融粘度をより低くすることで色ムラを解消することが行われてきた。
しかしながら、ポリプロピレン系の樹脂で無機フィラーを充填されたものや、薄肉成形を目的にメルトフローレート(以下MFRという)が25を超えるものは、色ムラやフローマークが発生し易く、この問題の解決が待たれていた。
【0006】
【発明が解決しようとする課題】
本発明者らは、上記の種々の欠点を改良すべく鋭意検討した結果、特定の化合物を分散剤として用いた着色用樹脂組成物は、ポリオレフィン系樹脂の引張強度や曲げ強度、衝撃強度等の機械物性の各強度値に対し5%以上の物性阻害を与えず、顔料分散性に優れ色ムラのない均一な着色ができることを見出し、本発明に至った。
【0007】
【課題を解決するための手段】
本発明は、顔料と、分散剤、または顔料と、分散剤と、熱可塑性樹脂を主成分としたものを混練して得られる熱可塑性樹脂着色用樹脂組成物において、該分散剤が下記の化学構造式で示される化合物であることを特徴とする熱可塑性樹脂着色用樹脂組成物を提供する。
CH−(CH−CH−O(CHCHO)
x;28〜48(平均) n;1〜16
該分散剤において市場に市販されているものとしては、Unitox(ペトロライト社製)が挙げられる。
【0008】
顔料としては、有機顔料および無機顔料があり、従来から熱可塑性樹脂の着色に使用されている公知の顔料が使用できる。このような顔料としては、アゾ系,アントラキノン系,フタロシアニン系,キナクリドン系,イソインドリノン系,ジオキサン系,ベリレン系,キノフタロン系,ベリノン系,などの有機顔料、硫化カドミウム,セレン化カドミウム,群青,二酸化チタン,酸化鉄,酸化クロム酸塩,カーボンブラックなどの無機顔料がある。
【0009】
熱可塑性樹脂としては、マスターバッチが製造可能な樹脂であれば特に限定されることはなく、ポリオレフィン、ポリメチルペンテン,ポリスチレン,ポリ塩化ビニル,ポリエチレンテレフタレート,ポリブチレンテレフタレート,アクリロニトリル−ブタジエン−スチレン(ABS)樹脂,アクリロニトリル−EPDM−スチレン(AES)樹脂,アクリル系樹脂,ポリアミド,ポリカーボネート,ポリアセタール,ポリウレタン等が挙げられる。
【0010】
なかでも、MFRが0.1〜400、好ましくは10〜100の範囲にあるポリオレフィン系樹脂は、ポリオレフィン系樹脂との相溶性が良いため、ポリオレフィン系樹脂を着色する場合には好ましい。熱可塑性樹脂着色用樹脂組成物に配合されるポリオレフィン系樹脂のMFRが0.1未満の時は、着色されるポリオレフィン系樹脂との相溶性が悪くなり、色ムラなどを生じると共に、着色された熱可塑性樹脂の諸物性にも悪影響を生じる。MFRが400を超える場合には、マスターバッチ自体の機械的強度や耐熱性が低くなり、マスターバッチの製造が困難になると共に、着色されるポリオレフィン系樹脂の耐熱性や、強度などの諸物性に悪影響を与える。着色用樹脂組成物に配合されるポリオレフィン系樹脂は、官能基変性、架橋変性やグラフト化及びブロック化変性を施されたものでも良く、粉体状であってもペレット状であっても良い。
【0011】
本発明の熱可塑性樹脂着色用樹脂組成物には、本発明の効果を阻害しない範囲で、少量の酸化防止剤,紫外線吸収剤等の安定剤や界面活性剤などの各種の添加剤を添加することもできる。本発明の着色用樹脂組成物は、ほとんどすべてのポリオレフィン系樹脂の着色に供することができ、物性の向上を目的に無機フィラーやガラス繊維、有機繊維などの強化材を含むものであっても良い。例えば、従来のマスターバッチを用いた着色では実現不可能であった強度などの機械物性や耐熱性などへの影響がなく色ムラのない均一な着色が、無機充填剤や繊維強化材を最大50重量%程度含むポリオレフィン系樹脂組成物100重量部に対して本発明の着色用樹脂組成物4重量部以下の少量添加で実現可能である。
【0012】
本発明の熱可塑性樹脂着色用樹脂組成物は、ポリオレフィン系樹脂以外にポリメチルペンテン,ポリスチレン,ポリ塩化ビニル,ポリエチレンテレフタレート,ポリブチレンテレフタレート,アクリロニトリル−ブタジエン−スチレン(ABS)樹脂,アクリロニトリル−EPDM−スチレン(AES)樹脂,アクリル系樹脂,ポリアミド,ポリカーボネート,ポリアセタール,ポリウレタン等の熱可塑性樹脂にも配合することができる。
【0013】
本発明の熱可塑性樹脂着色用樹脂組成物の顔料分散性及び着色力の向上は、分散剤中のエチレンオキサイドの顔料に対する親和性によるものであり、分散剤中の水酸基が顔料との間に極性的な結合が形成され、その回りが長鎖アルキル基で包まれ、保護コロイド的な構造を取っているものと考えられる
【0014】
【実施例】
以下、本発明を具体的に実施例を持って説明する。例中、部とは重量部を、%とは重量%をそれぞれ表す。使用した分散剤を表1に示す。
【表1】

Figure 0003569928
【0015】
〔実施例1〕
Figure 0003569928
上記3成分を3本ロールミルで混練し、スクリュー直径65mmの押出成形機でペレット化し、マスターバッチを得た。この際ストランド切れや脈流を生じることなしに順調にマスターバッチを得ることができた。ポリプロピレン「三井ノーブレンJ4HG」 100重量部に、得られたマスターバッチ 3部を混合して、縦型テスト紡糸機(富士フィルター社製スピニングテスター)で、ホッパー下 230℃、混練部、ダイス部 230℃で紡糸後3倍延伸を行い、5デニールのポリプロピレン繊維を得た。紡糸性、目詰まり性、延伸性共問題なく良好な分散性を示した。
【0016】
〔比較例1〕
分散剤Aをポリエチレン系樹脂「APAO RT 2315」(宇部レキセン社製)に代えた以外は実施例1と同様にしてマスターバッチを得た。この際ストランド切れや脈流を生じることなしに順調にマスターバッチを得ることができた。次いで、実施例1と同様にして紡糸を行ったが、目詰まりによる糸切れが発生した。
【0017】
〔実施例2〕
分散剤Aを分散剤Bに代えた以外は実施例1と同様にしてマスターバッチを得た。次いで、実施例1と同様にして紡糸を行ったところ、紡糸性、目詰まり性、延伸性共問題なく良好な分散性を示した。
〔比較例2〕
分散剤Aをポリプロピレンワックス「ビスコール660P」(三洋化成社製)に代えた以外は実施例1と同様にしてマスターバッチを得た。この際ストランド切れや脈流を生じることなしに順調にマスターバッチを得ることができた。次いで、実施例1と同様にして紡糸を行ったところ、目詰まりによる糸切れが発生した。
【0018】
未分散顔料の目詰まり性を比較するために、実施例1、2及び比較例1、2で得られたマスターバッチ10部を、それぞれポリプロピレン「三井ノーブレンJ4HG」 100部に混合し、それぞれの混合物を先端に 500メッシュの金網を装着したスクリュー径が30mmの単軸押出機で 3kg押し出した。先端部での圧力上昇値を表2に示す。
また、顔料の分散発色性を比較するために、実施例1、2及び比較例1、2で得られたマスターバッチ1部を、それぞれ酸化チタン5部およびポリプロピレン「三井ノーブレンJ4HG」 100部と配合して2本ロールミルで混練し、冷却プレスで 2mm厚のプレートに成形した。色差計(米国ハンター社製)にて 600nmの反射強度を測定した結果を表2に示す。
【0019】
【表2】
Figure 0003569928
【0020】
〔実施例3〕
Figure 0003569928
上記4成分をニーダーで混練し、実施例1と同様にしてペレット化し、マスターバッチを得た。この際ストランド切れや脈流を生じることなしに順調にマスターバッチを得ることができた。次いで、MFR:6.5 のポリエチレン「ハイゼックス 2100J」(三井石油化学社製) 100重量部に、得られたマスターバッチ3部を混合して、射出成形機にて背圧0kg/cmでプレートに成形した。
【0021】
〔比較例3〕
分散剤Cの代わりにポリエチレンワックス「サンワックス131P」(三洋化成工業社製)を用いた以外は実施例3と同様にしてマスターバッチを得た。この際ストランド切れや脈流を生じることなしに順調にマスターバッチを得ることができた。次いで、実施例3と同様にしてプレート成形品を得た。
〔実施例4〕
分散剤Cを分散剤Dに代えた以外は実施例3と同様にしてマスターバッチを得た。この際ストランド切れや脈流を生じることなしに順調にマスターバッチを得ることができた。次いで、実施例3と同様にしてプレート成形品を得た。
【0022】
〔比較例4〕
分散剤Cをポリエチレンワックス「サンワックス131P」10%およびスチレン−ブタジエン−スチレン共重合体「カリフレックスTRKX138S」(シェル化学社製)10%に代えた以外は実施例3と同様にしてマスターバッチを得た。この際ストランド切れや脈流を生じることなしに順調にマスターバッチを得ることができた。次いで、実施例3と同様にしてプレート成形品を得た。
【0023】
〔実施例5〕
Figure 0003569928
上記4成分を3本ロールミルで混練し、実施例1と同様にしてマスターバッチを得た。この際ストランド切れや脈流を生じることなしに順調にマスターバッチを得ることができた。次いで、タルク20%を含有するポリエチレン組成物「サンレットTA−120」(三井石油化学工業社製) 100部に、得られたマスターバッチ3部を混合して、実施例3と同様にしてプレート成形品を得た。
【0024】
〔比較例5〕
Figure 0003569928
上記4成分を3本ロールミルで混練し、実施例1と同様にしてマスターバッチを得ようとしたが、この際ストランド切れや脈流を生じ、連続して順調にペレット形状の良好なマスターバッチを得ることができなかった。次いで、実施例5と同様にしてプレート成形品を得た。
【0025】
〔実施例6〕
分散剤Eを分散剤Fに代えた以外は、実施例5と同様にしてマスターバッチを得た。次いで、実施例5と同様にしてプレート成形品を得た。
〔実施例7〕
分散剤Eを分散剤Gに代えた以外は、実施例5と同様にしてマスターバッチを得た。次いで、実施例5と同様にしてプレート成形品を得た。
【0026】
〔実施例8〕
Figure 0003569928
上記3成分を3本ロールミルで混練し、実施例1と同様にしてマスターバッチを得た。この際ストランド切れや脈流を生じることなしに順調にマスターバッチを得ることができた。次いで、実施例5と同様にしてプレート成形品を得た。
〔実施例9〕
分散剤Hを分散剤Iに代えた以外は、実施例8と同様にしてマスターバッチを得た。次いで、実施例5と同様にしてプレート成形品を得た。
【0027】
得られたプレート成形品について、機械的物性の保持率、成形品表面の色ムラ、顔料分散度およびマスターバッチの生産性を評価した結果を表3に示す。
評価方法および評価基準を以下に示す。
Figure 0003569928
【0028】
Figure 0003569928
【0029】
【表3】
Figure 0003569928
【0030】
【発明の効果】
本発明の熱可塑性樹脂着色用樹脂組成物は、顔料含有率が非常に高いにもかかわらず、顔料分散性に優れており、高度な顔料分散を要求される繊維製品の着色において、その着色力及び加工性に大きな効果を発揮する。また、従来、マスターバッチによる均一な着色が困難であった機械的物性や耐熱性などの物性が特に重視される無機フィラーや繊維強化材を高含有率で含むポリオレフィン系樹脂組成物の着色に対しても極めて有効であり、色ムラのない着色が可能である。[0001]
[Industrial applications]
The present invention relates to a resin composition for coloring a thermoplastic resin.
[0002]
[Prior art]
Conventionally, polyolefin-based resin coloring compositions include a powdery dry color obtained by mixing a pigment and a dispersant, a liquid color or paste color obtained by dispersing a pigment in a liquid dispersant at ordinary temperature, and a solid resin at ordinary temperature. There are a pellet-like, flake-like, or bead-like master batch in which a pigment is dispersed, and the like. These coloring compositions are selectively used by taking advantage of their characteristics depending on the use. Of these, masterbatches are preferably used in terms of ease of handling and preservation of working environment during use. In addition, the performance required as a masterbatch, such as high pigment concentration, small influence on various physical properties such as heat resistance and strength of the thermoplastic resin to be colored, etc., as well as precision molding of polyolefin resin, With the increase in speed, pigment dispersibility and dispersibility have been required more than before.
[0003]
Examples of dispersants that impart pigment dispersibility to the master batch include stearic acid, zinc stearate, magnesium stearate, aluminum stearate, calcium stearate, ethylene bisamide, polyethylene wax, polypropylene wax, and derivatives and acid-modified products thereof. One or two or more kinds of waxes or acid-modified waxes are generally used. However, for example, when a high degree of pigment dispersion is required such as high-speed spinning of a thermoplastic resin with a diameter of several tens of microns or formation of a film, the dispersant is insufficient. In other words, yarn breakage during spinning due to poor pigment dispersion, clogging of the filter of the melt spinning machine, molding failure in the film, and the like occurred. In order to solve these problems, efforts have been made to improve the processing method of the master batch and to improve the dispersibility of the pigment by using a powerful kneader. However, they did not exhibit sufficient pigment dispersing ability to solve the above problem.
[0004]
Further, in the field of large-sized injection molding in which colored pellets have conventionally been used, color unevenness and flow marks have become a problem in coloring of molded articles with an increase in coloring with a master batch. 2. Description of the Related Art Conventionally, in blow molding or film molding which has been colored by a master batch, plasticization, mixing and kneading of a resin and a master batch are performed in an extruder portion of a molding machine. In the case of an injection molding machine, the plasticizing, mixing, and kneading steps are performed in a cylinder that retreats the screw, but the kneading force is not sufficient compared with the extruder, and the molding cycle is shortened and the viscosity of the molding resin is reduced. As a result, the kneading force has become smaller, and as a result, color unevenness tends to occur on the surface of the molded product.
[0005]
In addition, by increasing the pigment content of the masterbatch, which has been promoted to reduce the cost of coloring, and reducing the amount of masterbatch added to the resin to be colored due to the emergence of a high-concentration masterbatch, The occurrence of flow marks has become more likely. These problems are recognized in various thermoplastic resins, but are remarkable in polypropylene-based resins which have been increasingly used in home electric appliances and automobile parts, and urgent solutions have been demanded. To solve this problem, of the three main components of the masterbatch (pigment, dispersant and base resin), increase the content of the dispersant or use a base resin with a viscosity smaller than that of the resin to be colored. Color unevenness has been eliminated by lowering the melt viscosity of the master batch.
However, a resin filled with an inorganic filler with a polypropylene resin or a resin having a melt flow rate (hereinafter, referred to as MFR) of more than 25 for thin-wall molding is liable to cause color unevenness and a flow mark. Was waiting.
[0006]
[Problems to be solved by the invention]
The present inventors have conducted intensive studies to improve the various disadvantages described above, and as a result, a coloring resin composition using a specific compound as a dispersant, tensile strength and bending strength of polyolefin resin, impact strength and the like. The present inventors have found that uniformity of color can be obtained with excellent pigment dispersibility and no color unevenness without giving any physical property inhibition of 5% or more to each strength value of mechanical properties, and the present invention has been accomplished.
[0007]
[Means for Solving the Problems]
The present invention provides a resin composition for coloring a thermoplastic resin obtained by kneading a pigment, a dispersant, or a pigment, a dispersant, and a composition mainly containing a thermoplastic resin, wherein the dispersant has the following chemical properties: Provided is a resin composition for coloring a thermoplastic resin , which is a compound represented by a structural formula.
CH 3 - (CH 2) X -CH 2 -O (CH 2 CH 2 O) n H
x; 28 to 48 (average) n; 1 to 16
As a commercially available dispersant, Unitox (manufactured by Petrolite) can be mentioned.
[0008]
Pigments include organic pigments and inorganic pigments, and known pigments conventionally used for coloring thermoplastic resins can be used. Examples of such pigments include organic pigments such as azo-based, anthraquinone-based, phthalocyanine-based, quinacridone-based, isoindolinone-based, dioxane-based, berylen-based, quinophthalone-based, and verinone-based pigments, cadmium sulfide, cadmium selenide, ultramarine, There are inorganic pigments such as titanium dioxide, iron oxide, chromate, and carbon black.
[0009]
The thermoplastic resin is not particularly limited as long as a master batch can be produced. Polyolefin, polymethylpentene, polystyrene, polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, acrylonitrile-butadiene-styrene (ABS) ) Resin, acrylonitrile-EPDM-styrene (AES) resin, acrylic resin, polyamide, polycarbonate, polyacetal, polyurethane and the like.
[0010]
Among them, a polyolefin-based resin having an MFR in the range of 0.1 to 400, preferably 10 to 100 has good compatibility with the polyolefin-based resin, and is therefore preferable when coloring the polyolefin-based resin. When the MFR of the polyolefin resin blended in the resin composition for coloring a thermoplastic resin is less than 0.1, the compatibility with the polyolefin resin to be colored becomes poor, and color unevenness and the like occur, and the colored resin is colored. The physical properties of the thermoplastic resin are also adversely affected. When the MFR exceeds 400, the mechanical strength and heat resistance of the masterbatch itself become low, making the production of the masterbatch difficult, and the heat resistance and various physical properties such as strength of the polyolefin resin to be colored. Has a negative effect. The polyolefin resin blended in the coloring resin composition may be modified with a functional group, cross-linked, grafted or blocked, and may be in the form of powder or pellets.
[0011]
To the resin composition for coloring a thermoplastic resin of the present invention, a small amount of various additives such as a stabilizer such as an antioxidant and an ultraviolet absorber and a surfactant are added as long as the effects of the present invention are not impaired. You can also. The coloring resin composition of the present invention can be used for coloring almost all polyolefin resins, and may contain a reinforcing material such as an inorganic filler, glass fiber, or organic fiber for the purpose of improving physical properties. . For example, uniform coloring with no influence on mechanical properties such as strength and heat resistance, which was not possible with coloring using a conventional masterbatch, and without color unevenness, can be achieved by adding up to 50% of inorganic fillers and fiber reinforced materials. It can be realized by adding a small amount of 4 parts by weight or less of the coloring resin composition of the present invention to 100 parts by weight of the polyolefin resin composition containing about 10% by weight.
[0012]
The resin composition for coloring a thermoplastic resin according to the present invention includes, in addition to the polyolefin resin, polymethylpentene, polystyrene, polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, acrylonitrile-butadiene-styrene (ABS) resin, and acrylonitrile-EPDM-styrene. (AES) Resin, acrylic resin, polyamide, polycarbonate, polyacetal, polyurethane and other thermoplastic resins can also be blended.
[0013]
The improvement in the pigment dispersibility and coloring power of the thermoplastic resin coloring resin composition of the present invention is due to the affinity of ethylene oxide in the dispersant for the pigment, and the hydroxyl group in the dispersant has a polarity between the pigment and the pigment. It is considered that a natural bond is formed, the surrounding area is wrapped with a long-chain alkyl group, and a protective colloidal structure is formed .
[0014]
【Example】
Hereinafter, the present invention will be described specifically with examples. In the examples, “parts” means “parts by weight” and “%” means “% by weight”. Table 1 shows the dispersants used.
[Table 1]
Figure 0003569928
[0015]
[Example 1]
Figure 0003569928
The above three components were kneaded with a three-roll mill, and pelletized with an extruder having a screw diameter of 65 mm to obtain a master batch. At this time, a master batch could be obtained smoothly without breaking strands or pulsating flow. 100 parts by weight of polypropylene "Mitsui Noblen J4HG" was mixed with 3 parts of the obtained master batch, and a vertical test spinning machine (Fuji Filter Co., Ltd. spinning tester) was used. After spinning, the resultant was drawn three times to obtain a 5-denier polypropylene fiber. Good dispersibility was exhibited without any problems in spinnability, clogging and stretchability.
[0016]
[Comparative Example 1]
A masterbatch was obtained in the same manner as in Example 1 except that the dispersant A was changed to a polyethylene resin “APART2315” (manufactured by Ube Lexen). At this time, a master batch could be obtained smoothly without breaking strands or pulsating flow. Next, spinning was performed in the same manner as in Example 1, but the yarn was broken due to clogging.
[0017]
[Example 2]
A masterbatch was obtained in the same manner as in Example 1, except that Dispersant A was replaced with Dispersant B. Next, when spinning was carried out in the same manner as in Example 1, good dispersibility was exhibited without any problems in spinnability, clogging and stretchability.
[Comparative Example 2]
A masterbatch was obtained in the same manner as in Example 1 except that the dispersant A was replaced with polypropylene wax “Viscol 660P” (manufactured by Sanyo Chemical Industries, Ltd.). At this time, a master batch could be obtained smoothly without breaking strands or pulsating flow. Subsequently, when spinning was performed in the same manner as in Example 1, yarn breakage due to clogging occurred.
[0018]
In order to compare the clogging property of the undispersed pigment, 10 parts of the master batch obtained in Examples 1 and 2 and Comparative Examples 1 and 2 were mixed with 100 parts of polypropylene “Mitsui Noblen J4HG”, respectively, and each mixture was mixed. Was extruded by a single screw extruder having a screw diameter of 30 mm equipped with a wire mesh of 500 mesh at the tip. Table 2 shows the pressure rise value at the tip.
Further, in order to compare the dispersive color developing properties of the pigment, 1 part of the master batch obtained in Examples 1 and 2 and Comparative Examples 1 and 2 was blended with 5 parts of titanium oxide and 100 parts of polypropylene “Mitsui Noblen J4HG”, respectively. Then, the mixture was kneaded by a two-roll mill and formed into a plate having a thickness of 2 mm by a cooling press. Table 2 shows the results of measuring the reflection intensity at 600 nm with a color difference meter (manufactured by Hunter, USA).
[0019]
[Table 2]
Figure 0003569928
[0020]
[Example 3]
Figure 0003569928
The above four components were kneaded in a kneader and pelletized in the same manner as in Example 1 to obtain a master batch. At this time, a master batch could be obtained smoothly without breaking strands or pulsating flow. Next, 100 parts by weight of polyethylene “HIZEX 2100J” (manufactured by Mitsui Petrochemical Co., Ltd.) having an MFR of 6.5 were mixed with 3 parts of the obtained master batch, and the mixture was plate-plated with an injection molding machine at a back pressure of 0 kg / cm 2 . Molded.
[0021]
[Comparative Example 3]
A masterbatch was obtained in the same manner as in Example 3 except that polyethylene wax “Sunwax 131P” (manufactured by Sanyo Chemical Industries, Ltd.) was used instead of Dispersant C. At this time, a master batch could be obtained smoothly without breaking strands or pulsating flow. Next, a plate molded product was obtained in the same manner as in Example 3.
[Example 4]
A master batch was obtained in the same manner as in Example 3, except that Dispersant C was replaced with Dispersant D. At this time, a master batch could be obtained smoothly without breaking strands or pulsating flow. Next, a plate molded product was obtained in the same manner as in Example 3.
[0022]
[Comparative Example 4]
A master batch was prepared in the same manner as in Example 3 except that the dispersant C was changed to 10% of polyethylene wax “Sunwax 131P” and 10% of styrene-butadiene-styrene copolymer “Califlex TRKX138S” (manufactured by Shell Chemical Co., Ltd.). Obtained. At this time, a master batch could be obtained smoothly without breaking strands or pulsating flow. Next, a plate molded product was obtained in the same manner as in Example 3.
[0023]
[Example 5]
Figure 0003569928
The above four components were kneaded with a three-roll mill, and a master batch was obtained in the same manner as in Example 1. At this time, a master batch could be obtained smoothly without breaking strands or pulsating flow. Then, 3 parts of the obtained masterbatch was mixed with 100 parts of a polyethylene composition "Sunlet TA-120" (manufactured by Mitsui Petrochemical Industries, Ltd.) containing 20% of talc, and plate molding was performed in the same manner as in Example 3. I got the goods.
[0024]
[Comparative Example 5]
Figure 0003569928
The above-mentioned four components were kneaded with a three-roll mill, and a master batch was obtained in the same manner as in Example 1. At this time, strand breaks and pulsation occurred, and a master batch having a good pellet shape was continuously and smoothly formed. I couldn't get it. Next, a plate molded product was obtained in the same manner as in Example 5.
[0025]
[Example 6]
A masterbatch was obtained in the same manner as in Example 5, except that Dispersant E was replaced with Dispersant F. Next, a plate molded product was obtained in the same manner as in Example 5.
[Example 7]
A masterbatch was obtained in the same manner as in Example 5, except that Dispersant E was replaced with Dispersant G. Next, a plate molded product was obtained in the same manner as in Example 5.
[0026]
Example 8
Figure 0003569928
The above three components were kneaded with a three-roll mill, and a master batch was obtained in the same manner as in Example 1. At this time, a master batch could be obtained smoothly without breaking strands or pulsating flow. Next, a plate molded product was obtained in the same manner as in Example 5.
[Example 9]
A masterbatch was obtained in the same manner as in Example 8, except that Dispersant H was replaced with Dispersant I. Next, a plate molded product was obtained in the same manner as in Example 5.
[0027]
Table 3 shows the results of evaluating the retention of mechanical properties, the color unevenness on the surface of the molded product, the degree of pigment dispersion, and the productivity of the masterbatch.
The evaluation method and evaluation criteria are shown below.
Figure 0003569928
[0028]
Figure 0003569928
[0029]
[Table 3]
Figure 0003569928
[0030]
【The invention's effect】
The resin composition for coloring a thermoplastic resin of the present invention has excellent pigment dispersibility despite having a very high pigment content, and has a high coloring power in coloring textile products that require a high degree of pigment dispersion. It has a great effect on workability. Also, conventionally, it was difficult to uniformly color the master batch, physical properties such as mechanical properties and heat resistance, which is particularly important, for the coloring of polyolefin resin compositions containing a high content of inorganic fillers and fiber reinforcements. Is extremely effective, and coloring without color unevenness is possible.

Claims (4)

顔料と、分散剤を主成分としたものを混練して得られる熱可塑性樹脂着色用樹脂組成物において、該分散剤が下記の化学構造式で示される化合物であることを特徴とする熱可塑性樹脂着色用樹脂組成物。
CH−(CH−CH−O(CHCHO)
x;28〜48(平均) n;1〜16
A pigment, the thermoplastic resin colored resin composition obtained by kneading a material chiefly containing dispersant, a thermoplastic resin dispersant is characterized in that a compound represented by the following chemical structural formula Coloring resin composition.
CH 3 - (CH 2) X -CH 2 -O (CH 2 CH 2 O) n H
x; 28 to 48 (average) n; 1 to 16
顔料と、分散剤と、熱可塑性樹脂を主成分としたものを混練して得られる熱可塑性樹脂着色用樹脂組成物において、該分散剤が下記の化学構造式で示される化合物であることを特徴とする熱可塑性樹脂着色用樹脂組成物。
CH−(CH−CH−O(CHCHO)
x;28〜48(平均) n;1〜16
In a resin composition for coloring a thermoplastic resin obtained by kneading a pigment, a dispersant, and a composition containing a thermoplastic resin as a main component , the dispersant is a compound represented by the following chemical structural formula. A resin composition for coloring a thermoplastic resin .
CH 3 - (CH 2) X -CH 2 -O (CH 2 CH 2 O) n H
x; 28 to 48 (average) n; 1 to 16
熱可塑性樹脂が、メルトフローレート0.1〜400の範囲にあるポリオレフィン系樹脂であることを特徴とする請求項1又は2に記載の熱可塑性樹脂着色用樹脂組成物。The thermoplastic resin coloring resin composition according to claim 1, wherein the thermoplastic resin is a polyolefin resin having a melt flow rate in a range of 0.1 to 400. 4. 請求項1〜3いずれかに記載の熱可塑性樹脂着色用樹脂組成物を用いて得られる成形品。A molded article obtained by using the resin composition for coloring a thermoplastic resin according to claim 1.
JP19954793A 1993-08-11 1993-08-11 Resin composition for coloring thermoplastic resin and molded article Expired - Fee Related JP3569928B2 (en)

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