JP5105731B2 - Thermoplastic resin composition for molded articles having flip-flop metallic feeling - Google Patents
Thermoplastic resin composition for molded articles having flip-flop metallic feeling Download PDFInfo
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本発明は、自動車、車輌用、家電製品などの各種成形材料として塗装品と同等なフリップフロップ性メタリック感を有する成形品用熱可塑性樹脂組成物に関する。 The present invention relates to a thermoplastic resin composition for molded articles having a flip-flop metallic feeling equivalent to that of a coated article as various molding materials for automobiles, vehicles, and home appliances.
従来、マイカ製パール顔料を使用し単なる金属光沢を有する方法（特開平５−９３０９１号公報）は知られている。
一方、通常のメタリック感を伴った塗装による製品は、単なる金属光沢に止まらず、視線の方向で色相が変化して見える。この視線の方向による異方性は干渉現象によって起こるものであり、これを一般にフリップフロップ性と呼ばれている。
特に、淡い有彩色着色を施したメタリック塗装品は独特のフリップフロップ性を有し、図１のような変角分光測色で測色した場合、ハイライト側、シェード側での有彩色発色が顕著で、中間角度では有彩色発色効果は低下する現象が見られる。しかしながら、熱可塑性樹脂の着色成形品の表面に塗装品と同様のフリップフロップ性を発現させることは非常に困難で、ハイライト側、シェード側どちらか一方の発色が顕著の場合が多く、塗装品と同様のフリップフロップ性メタリック感のある成形品を得ることは困難であった。
On the other hand, a product by painting with a normal metallic feeling does not stop at a mere metallic luster, and the hue appears to change in the direction of the line of sight. This anisotropy depending on the direction of the line of sight is caused by an interference phenomenon, and this is generally called flip-flop property.
In particular, metallic paint products with light chromatic coloring have a unique flip-flop property, and when measured by the variable angle spectrophotometry as shown in Fig. 1, chromatic color development on the highlight side and shade side is achieved. There is a noticeable phenomenon that the effect of chromatic coloring is reduced at intermediate angles. However, it is very difficult to develop the same flip-flop property as the painted product on the surface of the colored molded product of the thermoplastic resin, and the color development on either the highlight side or the shade side is often remarkable. It was difficult to obtain a molded product having a metallic feeling similar to that of the flip-flop.
本発明は、塗装品と同等のフリップフロップ性メタリック感のある熱可塑性樹脂成形品を得るために、フリップフロップ性メタリック感を有する成形品用熱可塑性樹脂組成物を提供するものである。 The present invention provides a thermoplastic resin composition for molded articles having a flip-flop metallic feeling in order to obtain a thermoplastic resin molded article having a flip-flop metallic feeling equivalent to that of a coated article.
塗装品において、フリップフロップ性メタリック感が現れるのは、塗装層にメタリック材が高含有量で配合されているためである。しかしながら、熱可塑性樹脂成形品の表面層にのみ、メタリック材を塗装品と同一高含有量で配合することは不可能である。本質的に熱可塑性樹脂成形品は表面層と内部の成分はほぼ同一である。成形品内部まで、メタリック材を高含有量にすると樹脂の物性が低下する。
本発明者らは、このような樹脂成分中のメタリック材の含有量を減少しても、フリップフロップ性メタリック感が現れる他の配合材料を鋭意研究の結果、干渉パールマイカがこの得意な作用を発揮することを見いだし、この知見に基づき本発明を完成するに至った。
すなわち、本発明は、次の各項の発明よりなる。
（１）アスペクト比１０〜１００のアルミニウム粉３〜３０重量％とアスペクト比１０〜１００のマイカの表面に金属酸化物の薄膜をコーティングした干渉タイプのパールマイカ３〜３０重量％及び熱可塑性樹脂６０〜９４重量％の割合で配合し、さらに着色剤を配合してなる着色組成物であって、該着色組成物を射出成形して得た５０×９０×２ｍｍの色相評価プレートを作成したとき、該色相評価プレートに対して垂直から４５°の角度で光源を照射して該照射角度の正反射方向を０°として、光源側に１５°、２５°、４５°、７５°、１１０°の角度で受光したものをＣＩＥ（Ｌ＊、ａ＊、ｂ＊）表色系で変角分光側色計によって側色し、Ｃ＊＝（ａ＊2＋ｂ＊2）1/2式に基いて彩度Ｃ＊を算出し、４５°のＣ＊が、１５°及び１１０°のＣ＊より小さいフリップフロップ性メタリック感を有する着色組成物であって、該着色組成物の成形品がフリップフロップ性メタリック感を有することを特徴とする成形品用熱可塑性樹脂組成物。
（２）アスペクト比１０〜１００のアルミニウム粉３〜３０重量％、アスペクト比１０〜１００のマイカの表面に金属酸化物の薄膜をコーティングした干渉性がない着色タイプのマイカ顔料３〜３０重量％、アスペクト比１０〜１００のマイカの表面に金属酸化物の薄膜をコーティングした干渉タイプのパールマイカ３〜３０重量％を熱可塑性樹脂６０〜９１重量％の割合で配合してなる着色組成物であって、該着色組成物を射出成形して得た５０×９０×２ｍｍの色相評価プレートを作成したとき、該色相評価プレートに対して垂直から４５°の角度で光源を照射して該照射角度の正反射方向を０°として、光源側に１５°、２５°、４５°、７５°、１１０°の角度で受光したものをＣＩＥ（Ｌ＊、ａ＊、ｂ＊）表色系で変角分光側色計によって側色し、Ｃ＊＝（ａ＊2＋ｂ＊2）1/2式に基いて彩度Ｃ＊を算出し、４５°のＣ＊が、１５°及び１１０°のＣ＊より小さいフリップフロップ性メタリック感を有する着色組成物であって、該着色組成物の成形品がフリップフロップ性メタリック感を有することを特徴とする成形品用熱可塑性樹脂組成物。
The reason why the flip-flop metallic feeling appears in the coated product is that the metallic material is blended in the coating layer with a high content. However, it is impossible to blend the metallic material with the same high content as the coated product only in the surface layer of the thermoplastic resin molded product. Essentially, the thermoplastic resin molded product has almost the same surface layer and internal components. If the content of the metallic material is increased to the inside of the molded product, the physical properties of the resin are lowered.
As a result of earnest research on other compounding materials in which a flip-flop metallic feeling appears even if the content of the metallic material in such a resin component is reduced, the interference pearl mica has achieved this excellent effect. Based on this finding, the present invention has been completed.
That is, this invention consists of invention of each following item.
(1) 3-30% by weight of aluminum powder having an aspect ratio of 10-100, 3-30% by weight of interference-type pearl mica coated with a metal oxide thin film on the surface of mica having an aspect ratio of 10-100, and a thermoplastic resin 60 When a 50 × 90 × 2 mm hue evaluation plate prepared by injection-molding the colored composition is a colored composition formed by blending at a ratio of ˜94 wt% and further containing a colorant, A light source is irradiated at an angle of 45 ° from the vertical to the hue evaluation plate, and the regular reflection direction of the irradiation angle is set to 0 °, and the light source side has angles of 15 °, 25 °, 45 °, 75 °, and 110 °. The side received by the CIE (L *, a *, b *) color system is side-colored by the variable angle spectroscopic colorimeter, and C * = (a * 2 + b * 2 ) 1/2 based on the formula Degree C * is calculated, and C * of 45 ° is C of 15 ° and 110 °. * A thermoplastic composition for molded articles, which is a colored composition having a smaller flip-flop metallic feel, wherein the molded article of the colored composition has a flip-flop metallic feel.
(2) 3 to 30% by weight of aluminum powder having an aspect ratio of 10 to 100, 3 to 30% by weight of a non-interfering colored mica pigment obtained by coating a metal oxide thin film on the surface of mica having an aspect ratio of 10 to 100, a 3 to 30 wt% pearl mica interference type coated with a thin film of metal oxide on the surface of the mica aspect ratio 10 to 100 colored composition obtained by blending in a ratio of 60 to 9 1% by weight thermoplastic resin When a hue evaluation plate of 50 × 90 × 2 mm obtained by injection molding the colored composition is prepared, a light source is irradiated at an angle of 45 ° from the perpendicular to the hue evaluation plate, and the irradiation angle The specular reflection direction is 0 °, and the light received at 15 °, 25 °, 45 °, 75 °, and 110 ° on the light source side is subjected to variable angle spectroscopy in the CIE (L *, a *, b *) color system. Depending on the side color meter The saturation C * is calculated based on the formula C * = (a * 2 + b * 2 ) 1/2 , and the flip-flop of 45 ° C * is smaller than C * of 15 ° and 110 ° A thermoplastic resin composition for molded articles, wherein the colored composition has a metallic metallic feeling, and the molded article of the colored composition has a flip-flop metallic metallic feeling.
本発明フリップフロップ性メタリック感を有する成形品用熱可塑性樹脂組成物は、干渉パールマイカをアルミニウム粉と併用することにより、塗装品と同等のフリップフロップ性メタリック感のある成形品を得ることができる。 The thermoplastic resin composition for molded articles having a flip-flop metallic feeling of the present invention can obtain a molded article having a flip-flop metallic feeling equivalent to a coated article by using interference pearl mica in combination with aluminum powder. .
本発明で使用される熱可塑性樹脂としては、例えば、ポリエチレン、ポリプロピレン、ポリブテン−１、ポリスチレン、ＡＳ樹脂、ＡＢＳ樹脂、ＡＢＳ・ＰＣアロイ、プロピレン−エチレン共重合体、スチレン−メチルメタクリレート共重合体、ポリエステル樹脂、ポリカーボネート樹脂、ポリアミド樹脂、ポリウレタン樹脂等を使用することができる。
本発明の樹脂組成物から成形品を得る方法は、射出成形、押出成形、圧空成形、プレス成形、ブロー成形で常法に従って成形することができる。
本発明に樹脂組成物に配合するアルミニウム粉は、金属アルミニウム粉をボールミル等により粉砕したもので、粒径１０〜２００μｍ、好ましくは２０〜１００μｍのものを使用することができる。
本発明に用いるアルミニウム粉は、アスペクト比１０〜１００、好ましくは２０〜６０の形状のアルミニウム粉を使用することができる。
一般に、パールマイカ顔料はその色調効果によって、（ａ）シルバータイプ、（ｂ）干渉タイプ及び（ｃ）着色タイプの３つのグループに大別されている。
シルバータイプは、雲母を二酸化チタンで被覆したものであり、この二酸化チタンの厚みを次第に増加していくと、厚みの増加とともに、色相が金色、赤色、紫色、青色及び緑色の順で反射してくる光の色が変化する。このようにチタン層の厚みを増して行く途中で、反射光の色が干渉する状態のものが干渉タイプ（虹彩色タイプ）である。二酸化チタン以外の金属酸化物であっても、夫々の種類に応じた適度の厚さのコーティングによって、干渉タイプのパールマイカ顔料を形成することができる。
また、着色タイプは、干渉性がなく雲母を酸化鉄、酸化チタン＋酸化鉄で被覆して、黄色もしくは金色に着色したものである。
本発明樹脂組成物に用いる干渉パールマイカとしては、天然マイカや合成マイカの表面に、二酸化チタン、酸化鉄その他クロム、コバルト、錫、ジルコニウム等の金属酸化物の薄膜をコーティングして干渉色効果を付与したパールマイカを使用することができる。特に、本発明の樹脂組成物において使用される干渉パール顔料は、雲母の表面に二酸化チタンを２１０〜４００μｍの薄膜状に被覆したものが特に望ましい。
本発明に用いる干渉パールマイカの粒径範囲は、アスペクト比１０〜１００、好ましくは２０〜６０で、平均粒径１〜８０μｍ、好ましくは、５〜３０μｍのものを使用することができる。なお、これらの干渉パールマイカはシランカップリング剤やチタンカップリング剤等で予め表面処理したものが均一に樹脂内部に分散する点で望ましい。
また、本発明に所望によって用いる干渉性のないマイカ顔料は、マイカ粉末、シルバータイプマイカ顔料又は着色パールマイカ顔料を使用することができる。すなわち、微細な雲母粉末若しくは光沢を発現させるために雲母表面をチタン処理したパールマイカ顔料である。
本発明に用いるマイカ顔料は、シランカップリング剤やチタンカップリング剤等で予め処理することができる。
本発明の樹脂組成物では、熱可塑性樹脂５０〜９９.４重量％、干渉パールマイカ顔料０.１〜４９.５重量％及びアルミニウム粉０.５〜４９.９重量％、好ましくは、熱可塑性樹脂６０〜９４重量％、干渉パールマイカ顔料３〜３０重量％及びアルミニウム粉３〜３０重量％を配合することができる。
また、本発明樹脂組成物のマイカ及び干渉パールマイカを併用する場合は、熱可塑性樹脂５０〜９９.３重量％、アルミニウム粉０.５〜４９.８重量％、マイカ０.１〜４９.４重量％及び干渉パールマイカ０.１〜４９.４重量％、好ましくは、熱可塑性樹脂６０〜９１重量％、アルミニウム粉３〜３０重量％、マイカ３〜３０重量％及び干渉パールマイカ３〜３０重量％の割合で配合することができる。
これらの配合物の添加量が、上記の範囲未満の場合は、フリップフロップ性メタリック感が不十分となり、範囲を超えると、樹脂成形品の物性が低下するので好ましくない。
これらの樹脂配合物以外に本発明樹脂組成物に、本発明の効果を損なわない範囲で、有機顔料、無機顔料、無機充填剤、内部潤滑剤、カップリング剤、酸化防止剤、紫外線防止剤、帯電防止剤等の他の物質も添加することができる。
有機顔料としては、例えば、アゾ系顔料、アンスラキノン系顔料、銅フタロシアニン系顔料、キナクリドン系顔料、インダンスレン系顔料、ペリレン系顔料等が挙げられる。無機顔料としては、例えば、二酸化チタン、弁柄、鉄黒、黄鉛、コバルトブルー、カーボンブラック等が挙げられる。
Examples of the thermoplastic resin used in the present invention include polyethylene, polypropylene, polybutene-1, polystyrene, AS resin, ABS resin, ABS / PC alloy, propylene-ethylene copolymer, styrene-methyl methacrylate copolymer, Polyester resin, polycarbonate resin, polyamide resin, polyurethane resin and the like can be used.
As a method for obtaining a molded product from the resin composition of the present invention, injection molding, extrusion molding, pressure molding, press molding, and blow molding can be used in accordance with conventional methods.
The aluminum powder blended in the resin composition in the present invention is obtained by pulverizing metal aluminum powder with a ball mill or the like, and those having a particle diameter of 10 to 200 μm, preferably 20 to 100 μm can be used.
As the aluminum powder used in the present invention, aluminum powder having an aspect ratio of 10 to 100, preferably 20 to 60 can be used.
In general, pearl mica pigments are roughly classified into three groups: (a) silver type, (b) interference type, and (c) colored type, depending on the color tone effect.
In the silver type, mica is coated with titanium dioxide. As the thickness of the titanium dioxide increases gradually, the hue reflects in the order of gold, red, purple, blue and green as the thickness increases. The color of the coming light changes. The interference type (iris color type) is a state in which the color of the reflected light interferes while increasing the thickness of the titanium layer. Even if it is a metal oxide other than titanium dioxide, an interference type pearl mica pigment can be formed by coating with an appropriate thickness according to each type.
In addition, the coloring type has no interference and is coated with iron oxide, titanium oxide + iron oxide, and colored yellow or gold.
As interference pearl mica used in the resin composition of the present invention, the surface of natural mica or synthetic mica is coated with a thin film of metal oxide such as titanium dioxide, iron oxide or other chromium, cobalt, tin, zirconium, etc. The provided pearl mica can be used. In particular, the interference pearl pigment used in the resin composition of the present invention is particularly preferably one in which the surface of mica is coated with titanium dioxide in a thin film form of 210 to 400 μm.
The particle size range of the interference pearl mica used in the present invention is an aspect ratio of 10 to 100, preferably 20 to 60, and an average particle size of 1 to 80 μm, preferably 5 to 30 μm. These interference pearl mica are desirable in that they are surface-treated in advance with a silane coupling agent, a titanium coupling agent or the like and are uniformly dispersed inside the resin.
In addition, mica powder, silver type mica pigment, or colored pearl mica pigment may be used as the non-interfering mica pigment used as desired in the present invention. That is, it is a pearl mica pigment whose surface is treated with titanium in order to develop fine mica powder or gloss.
The mica pigment used in the present invention can be pretreated with a silane coupling agent or a titanium coupling agent.
In the resin composition of the present invention, the thermoplastic resin is 50 to 99.4% by weight, the interference pearl mica pigment is 0.1 to 49.5% by weight, and the aluminum powder is 0.5 to 49.9% by weight, preferably thermoplastic. 60 to 94% by weight of resin, 3 to 30% by weight of interference pearl mica pigment, and 3 to 30% by weight of aluminum powder can be blended.
When the mica and interference pearl mica of the resin composition of the present invention are used in combination, the thermoplastic resin is 50 to 99.3% by weight, the aluminum powder is 0.5 to 49.8% by weight, and the mica is 0.1 to 49.4%. Wt% and interference pearl mica 0.1-49.4 wt%, preferably 60-91 wt% thermoplastic resin, aluminum powder 3-30 wt%, mica 3-30 wt% and interference pearl mica 3-30 wt% % Can be blended.
When the addition amount of these blends is less than the above range, the flip-flop metallic feeling is insufficient, and when it exceeds the range, the physical properties of the resin molded product are deteriorated.
In addition to these resin blends, in the resin composition of the present invention, organic pigments, inorganic pigments, inorganic fillers, internal lubricants, coupling agents, antioxidants, UV inhibitors, as long as the effects of the present invention are not impaired. Other materials such as antistatic agents can also be added.
Examples of organic pigments include azo pigments, anthraquinone pigments, copper phthalocyanine pigments, quinacridone pigments, indanthrene pigments, and perylene pigments. Examples of inorganic pigments include titanium dioxide, petals, iron black, yellow lead, cobalt blue, and carbon black.
本発明を実施例によってさらに詳細に説明する。
実施例１〜２
粒径３０μｍ、平均アスペクト比４３のアルミニウム粉、平均粒径３３μｍのブルー干渉パールマイカ顔料及び大日精化工業(株)製ポリオレフィン用無機系着色剤である群青を第１表に示す割合でポリプロピレン樹脂に配合した。この組成物を押出機により２２０〜２４０℃の温度で溶融混練して樹脂中にアルミニウム粉と干渉パールマイカ顔料を十分に分散し、ペレット状熱可塑性樹脂着色組成物を作成した。さらに、この着色組成物を平板金型を装着した射出成形機で２２０〜２４０℃で射出成形して５０×９０×２ｍｍの成形品を作成し、色相評価プレートとした。
比較例１
鋼板に、アルミニウム粉、青顔料を混合した塗料で塗装して淡いブルー色に着色された塗装板を作成した。塗装板の色相評価をして、実施例と比較した。
比較例２
粒径３０μｍ、平均アスペクト比４３のアルミニウム粉及び大日精化工業(株)製ポリオレフィン用無機系着色剤である群青を第１表に示す割合で配合し、他は実施例と同様にして色相評価プレートを作成した。
このようにして形成した色相評価プレートを、下記の測定方法によりＣＩＥ（Ｌ*、ａ*、ｂ*）表色系における色相の光学測定を評価し、その結果を第１表に示す。
色相：変角分光測色計［Ｘ−Ｒｉｔｅ社製、ＭＡ６８型、Ｄ６５光源、１０度視野］を用い、図１に示すように色相評価プレートに対し垂直から４５°の角度で光源を照射し、その照明角度の正反射方向を０°とし、そこから光源側に１５°、２５°、４５°、７５°、１１０°の角度で受光したものをＣＩＥ（Ｌ*、ａ*、ｂ*）表色系で測色し、明度（Ｌ*）及び彩度（Ｃ*）の値を測定した。
なお、彩度Ｃ＊は｛(ａ*)2＋(ｂ*)2｝1/2で計算した。
The invention is explained in more detail by means of examples.
Examples 1-2
Polypropylene resin in the proportion shown in Table 1 for aluminum powder having a particle size of 30 μm, average aspect ratio of 43, blue interference pearl mica pigment having an average particle size of 33 μm, and ultramarine, which is an inorganic colorant for polyolefins manufactured by Dainichi Seika Kogyo Co., Ltd. Blended into This composition was melt-kneaded with an extruder at a temperature of 220 to 240 ° C. to sufficiently disperse the aluminum powder and the interference pearl mica pigment in the resin to prepare a pellet-shaped thermoplastic resin coloring composition. Furthermore, this colored composition was injection-molded at 220 to 240 ° C. with an injection molding machine equipped with a flat plate mold to prepare a molded product of 50 × 90 × 2 mm, which was used as a hue evaluation plate.
Comparative Example 1
The steel plate was painted with a paint mixed with aluminum powder and blue pigment to produce a painted plate colored light blue. The hue of the coated plate was evaluated and compared with the examples.
Comparative Example 2
An aluminum powder having a particle diameter of 30 μm and an average aspect ratio of 43 and ultramarine blue, which is an inorganic colorant for polyolefins manufactured by Dainichi Seika Kogyo Co., Ltd., are blended in the proportions shown in Table 1, and the hue is evaluated in the same manner as in the examples. A plate was created.
The hue evaluation plate thus formed was evaluated for optical measurement of hue in the CIE (L *, a *, b *) color system by the following measurement method, and the results are shown in Table 1.
Hue: A variable angle spectrophotometer [manufactured by X-Rite, MA68 type, D65 light source, 10 ° field of view] was used to irradiate a light source at an angle of 45 ° to the hue evaluation plate as shown in FIG. CIE (L *, a *, b *) that received light at 15 °, 25 °, 45 °, 75 °, 110 ° from the light source side with the regular reflection direction of the illumination angle as 0 ° Color measurement was performed using a color system, and lightness (L *) and saturation (C *) values were measured.
The saturation C * was calculated by {(a *) 2 + (b *) 2 } 1/2 .
実施例３
粒径３０μｍ、平均アスペクト比４３のアルミニウム粉、平均粒径３３μｍのゴールド干渉パールマイカ顔料及び大日精化工業(株)製ポリオレフィン用無機系着色剤である焼成黄を第２表に示す割合でポリプロピレン樹脂に配合した。この組成物を押出機により２２０〜２４０℃の温度で溶融混練して樹脂中にアルミニウム粉と干渉パールマイカ顔料を十分に分散し、ペレット状熱可塑性樹脂着色組成物を作成した。さらに、この着色組成物を平板金型を装着した射出成形機で２２０〜２４０℃で射出成形して５０×９０×２ｍｍの成形品を作成し、色相評価プレートとした。
比較例３
鋼板に、アルミニウム粉、黄顔料を混合した塗料で塗装して淡いイエロー色に着色された塗装板を比較例として提示した。
比較例４〜５
粒径３０μｍ、平均アスペクト比４３のアルミニウム粉及びゴールド干渉パールマイカ顔料、または大日精化工業(株)製ポリオレフィン用無機系着色剤である焼成黄を第２表に示す割合で配合し、他は実施例と同様にして色相評価プレートを作成し、前記と同様の色相評価を行った。その評価結果を第２表に示す。
Example 3
Aluminum powder with a particle size of 30 μm, average aspect ratio of 43, gold interference pearl mica pigment with an average particle size of 33 μm, and calcined yellow, which is an inorganic colorant for polyolefins manufactured by Dainichi Seika Kogyo Co., Ltd., in the proportions shown in Table 2 Blended into resin. This composition was melt-kneaded with an extruder at a temperature of 220 to 240 ° C. to sufficiently disperse the aluminum powder and the interference pearl mica pigment in the resin to prepare a pellet-shaped thermoplastic resin coloring composition. Furthermore, this colored composition was injection-molded at 220 to 240 ° C. with an injection molding machine equipped with a flat plate mold to prepare a molded product of 50 × 90 × 2 mm, which was used as a hue evaluation plate.
Comparative Example 3
As a comparative example, a coated plate in which a steel plate was coated with a paint in which aluminum powder and yellow pigment were mixed and colored in a pale yellow color was presented.
Comparative Examples 4-5
Blended with aluminum powder having a particle size of 30 μm and an average aspect ratio of 43 and gold interference pearl mica pigment, or calcined yellow which is an inorganic colorant for polyolefins manufactured by Dainichi Seika Kogyo Co., Ltd. in proportions shown in Table 2, A hue evaluation plate was prepared in the same manner as in the examples, and the same hue evaluation as described above was performed. The evaluation results are shown in Table 2.
実施例の結果より、本発明は、樹脂組成物に干渉パールマイカを配合することにより、成形品の表面のハイライト側での発色を促し、彩度Ｃ＊の値は１５°及び１１０°のＣ＊より小さく、４５°の変角角度において極小値を示していて、各変角角度において、着色メタリック塗装品と同等のフリップフロップ性メタリック感を有する成形品用熱可塑性樹脂組成物を提供することができる。
一方比較例の場合は、各変角角度の彩度Ｃ＊の数値には、中間に極小値はなく、変角角度の増加とともに、彩度Ｃ＊の数値は増加又は減少している。
From the results of the examples, the present invention promotes color development on the highlight side of the surface of the molded product by blending interference pearl mica with the resin composition, and the values of chroma C * are 15 ° and 110 °. Provided is a thermoplastic resin composition for molded articles that is smaller than C * and exhibits a minimum value at a 45 ° angle of change, and has a flip-flop metallic feel equivalent to that of a colored metallic coating product at each angle of change. be able to.
On the other hand, in the case of the comparative example, the numerical value of the saturation C * at each variable angle has no minimum value in the middle, and the numerical value of the chroma C * increases or decreases as the variable angle increases.
塗装品と同等のフリップフロップ性メタリック感を有する成形品が要求される自動車、車輌用、家電製品などの成形品に利用可能性が大きい。 It is highly applicable to molded products such as automobiles, vehicles, and home appliances that require a molded product having a flip-flop metallic feeling equivalent to that of a painted product.
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