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JPH0476384B2 - - Google Patents
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JPH0476384B2 - - Google Patents

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Publication number
JPH0476384B2
JPH0476384B2 JP33102687A JP33102687A JPH0476384B2 JP H0476384 B2 JPH0476384 B2 JP H0476384B2 JP 33102687 A JP33102687 A JP 33102687A JP 33102687 A JP33102687 A JP 33102687A JP H0476384 B2 JPH0476384 B2 JP H0476384B2
Authority
JP
Japan
Prior art keywords
ethylene
weight
black
block copolymer
propylene
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 - Lifetime
Application number
JP33102687A
Other languages
Japanese (ja)
Other versions
JPH01170637A (en
Inventor
Masaki Kondo
Tomiji Shichizawa
Takaaki Osanai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dainichiseika Color and Chemicals Mfg Co Ltd
Original Assignee
Dainichiseika Color and Chemicals Mfg Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dainichiseika Color and Chemicals Mfg Co Ltd filed Critical Dainichiseika Color and Chemicals Mfg Co Ltd
Priority to JP33102687A priority Critical patent/JPH01170637A/en
Publication of JPH01170637A publication Critical patent/JPH01170637A/en
Publication of JPH0476384B2 publication Critical patent/JPH0476384B2/ja
Granted legal-status Critical Current

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  • Compositions Of Macromolecular Compounds (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

[産業上の利用分野] 本発明は、色むらのない黒色着色成形物を得る
ためのポリプロピレン着色組成物に関するもので
ある。 [従来の技術] ポリエチレン、ポリプロピレン等のポリオレフ
イン樹脂を黒色に着色成形するための着色用顔料
としては、一般にカーボンブラツク、グラフアイ
ト、鉄黒、フタロシアニンブラツク、アニリンブ
ラツク等が用いられている。 これらの顔料の中でも特にカーボンブラツクは
着色力に優れており、経済的にも安価であること
から多量に使用されている。 [発明が解決しようとする問題点] 一般に、無機体質材を含有する樹脂の着色には
顔料を多く必要とし、着色が困難になるが、本発
明に用いる無機体質材を10〜40重量%含有するエ
チレン・プロピレン−ブロツク共重合体にカーボ
ンブラツクを配合し、これを溶融押出してペレツ
ト化し、このペレツトを押出成形機や射出成形機
に供して成形物を成形した場合、成形の流れによ
つて色むらが発生する欠陥が生じた。 前記の色むら発生の防止目的で、例えばエチレ
ン・プロピレン−ブロツク共重合体の黒色着色に
於いてカーボンブラツクに替えて鉄黒を使用する
方法が提案されている(特公昭62−14576号公
報)。 ところが、カーボンブラツクに比較して鉄黒は
着色濃度がないため、カーボンブラツクと同じ様
な着色濃度を出すためには、カーボンブラツクの
約7〜10倍の鉄黒を必要とする。その結果、無機
質充填剤を多量に配合するようなエチレン・プロ
ピレン−ブロツク共重合体複合材料に於いては鉄
黒を多量に使用すると樹脂の物性が損なわれるた
め、好ましくないものであつた。 本発明者等は前記の鉄黒より着色濃度があり、
しかも無機質充填剤が入つた場合に於いて色分れ
が生ずることのない黒色顔料について種々研究を
重ねた結果、CuO−Mn2O3−Fe2O3系顔料又は
CuO−Cr2O3−Fe2O3系顔料が鉄黒より着色濃度
があり、無機体質材に多量に含有するエチレン・
プロピレン−ブロツク共重合体の着色成形に使用
した場合に、色分れが発生しないことを知見して
本発明に到達した。 [問題点を解決するための手段] すなわち、本発明は無機体質材を10〜40重量%
含有するエチレン・プロピレン−ブロツク共重合
体を黒色顔料によつて着色するに際して、前記黒
色顔料としてCuO−Mn2O3−Fe2O3系顔料又は
CuO−Cr2O3−Fe2O3系顔料を単独若しくは併用
して用いることを特徴とするポリプロピレ着色組
成物である。 以下、本発明を更に詳細に説明する。 本発明で使用するエチレン・プロピレン−ブロ
ツク共重合体とは、通称ブロツク共重合体と言わ
れているものであるが、実際は、ポリプロピレン
にエチレン・プロピレン共重合体をブレンドされ
た組成物であり、通常は多段重合により製造す
る。 通常ホモポリプロピレン50〜99重量%に対して
エチレン・プロピレン共重合体を1〜50重量%の
割合でブレンドされたものを使用する。 すなわち、第一重合槽でプロピレンを重合し
て、ホモポリプロピレンを生成させ、該ポリプロ
ピレンを含有した重合液をそのまま第二反応槽に
移し、プロピレンガスとともにエチレンガスを第
2反応槽に供給して、エチレン・プロピレン共重
合体を生成させ、この際、第一反応槽で生成した
ホモポリプロピレンと均一にブレンドされるもの
である。 本発明に用いるエチレン・プロピレン−ブロツ
ク共重合体の製造方法は、特公昭40−11623号公
報、特公昭43−11230号公報、特公昭44−16668号
公報などに記載されている。 本発明は、上記の製造方法の原料のプロピレン
又はエチレンの一部を炭素数4〜6のオレフイン
に変えて製造したエチレン・プロピレン−ブロツ
ク共重合体にも適用することかできる。 本発明に用いるエチレン・プロピレン−ブロツ
ク共重合体の分子量は特に制限はないが、通常
MIで表して、0.1〜20程度のものを使用すること
ができる。 本発明で使用する無機体質材とは、例えば、シ
リカ、アルミナ、タルク、クレー、炭酸カルシウ
ム、硫酸バリウム、無水石膏等である。 これらの無機体質材はエチレン・プロピレン−
ブロツク共重合体に対して10〜40重量%配合され
る。 本発明において黒色顔料として用いられるCuO
−Mn2O3−Fe2O3系顔料、CuO−Cr2O3−Fe2O3
系顔料は、エチレン・プロピレン−ブロツク共重
合体100重量部あたり、0.1〜7重量部の割合で使
用される。 なお本発明においては、前記の黒色顔料の他、
従来のプラスチツクの着色に一般に使用されてい
る顔料、例えばアゾ系、フタロシアニン系、キナ
クリドン系、アンスラキノン系、ジオキサジン
系、ペリレン系、インジゴ系、インダスレン系等
の有機顔料、コバルトブルー、黄鉛、ベンガラ、
酸化クロム、郡青、紺青等の無機顔料が使用され
る。 本発明の組成物の必須成分は、前記の成分であ
るが、その他必要に応じて各種担体樹脂、分散
剤、、紫外線吸収剤、安定剤等の添加剤を適宜配
合することができる。 本発明の樹脂組成物は、各種の形態をとること
ができるが、通常は必須成分を混合機(ヘンシエ
ルミキサー)で混合後、この混合物を押出機等の
混練機で溶融混練し、ペレツト状に賦形される。 このようにして得られた本発明の樹脂組成物を
常法によつて各種の形状に成形加工すると、その
成形物が複雑な形状を有するものであつて、その
表面の着色は非常に均一であつて、従来の欠点で
あつた色むらは殆んど生じることがない。 [実施例] 本発明を実施例によりさらに詳細に説明する。 実施例 1 エチレン含有8重量%、MFR1.8のエチレン・
プロピレン−ブロツク共重合体を用いて、 エチレン・プロピレン−ブロツク共重合体
80重量部 タルク 20重量部 CuO−Mn2O3−Fe2O3系黒色顔料 1.5重量部 なる配合割合の成分を混合機(ヘンシエルミキサ
ー)で均一に混合し、常法に従つて押出成形機で
押出成形を行い、着色ペレツトを得た。 上記ペレツトを射出成形機(名機製作所7oZ
を用いて120×100×3mmの板状成形品を成形し
た。(成形条件シリンダー温度220℃、金型温度40
℃)このものの色むら発生の状況を観察した。そ
の結果を第1表に示す。 実施例 2 実施例1と同じエチレン・プロピレン−ブロツ
ク共重合体を用いて、 エチレン・プロピレン−ブロツク共重合体
80重量部 タルク 20重量部 CuO−Cr2O3−Fe2O3系黒色顔料 1.5重量部 なる配合割合の成分を混合機(ヘンシエルミキサ
ー)で均一に混合し、常法に従つて押出成形機で
押出成形を行い、着色ペレツトを得た。 上記ペレツトを射出成形機(名機製作所70Z
を用いて120×100×3mmの板状成形品を成形し
た。(成形条件シリンダー温度220℃、金型温度40
℃)このものの色むら発生の状況を観察した。そ
の結果を第1表に示す。 比較例 1 実施例1と同じ樹脂を用いて、 エチレン・プロピレン−ブロツク共重合体
80重量部 タルク 20重量部 鉄 黒 1.5重量部 なる配合割合の成分を混合機(ヘンシエルミキサ
ー)で均一に混合し、常法に従つて押出成形機で
押出成形を行い、着色ペレツトを得た。 上記ペレツトを射出成形機(名機製作所70Z
を用いて120×100×3mmの板状成形品を成形し
た。(成形条件シリンダー温度220℃、金型温度40
℃)このものの色むら発生の状況を観察した。そ
の結果を第1表に示す。 比較例 2 同じ樹脂を用いて、 エチレン・プロピレン−ブロツク共重合体
80重量部 タルク 20重量部 カーボンブラツク 1.5重量部 なる配合割合の成分を混合機(ヘンシエルミキサ
ー)で均一に混合し、常法に従つて押出成形機で
押出成形を行い、着色ペレツトを得た。 上記ペレツトを射出成形機(名機製作所70Z
を用いて120×100×3mmの板状成形品を成形し
た。(成形条件シリンダー温度220℃、金型温度40
℃)このものの色むら発生の状況を観察した。そ
の結果を第1表に示す。
[Industrial Field of Application] The present invention relates to a polypropylene colored composition for obtaining a black colored molded article without uneven color. [Prior Art] Carbon black, graphite, iron black, phthalocyanine black, aniline black, etc. are generally used as coloring pigments for coloring and molding polyolefin resins such as polyethylene and polypropylene in black. Among these pigments, carbon black in particular has excellent coloring power and is economically inexpensive, so it is used in large quantities. [Problems to be solved by the invention] Generally, a large amount of pigment is required to color a resin containing an inorganic body material, making coloring difficult. When carbon black is blended with the ethylene propylene block copolymer to be used, this is melt-extruded to form pellets, and the pellets are sent to an extrusion molding machine or an injection molding machine to form a molded article. A defect occurred in which color unevenness occurred. In order to prevent the above-mentioned uneven coloring, a method has been proposed in which, for example, iron black is used in place of carbon black when coloring ethylene/propylene block copolymer black (Japanese Patent Publication No. 14576/1982). . However, compared to carbon black, iron black has less coloring density, so in order to produce the same coloring density as carbon black, about 7 to 10 times as much iron black as carbon black is required. As a result, in ethylene-propylene-block copolymer composite materials containing a large amount of inorganic filler, the use of a large amount of iron black impairs the physical properties of the resin, which is not desirable. The inventors have found that the color density is higher than that of the above-mentioned iron black,
Moreover, as a result of various studies on black pigments that do not cause color separation when inorganic fillers are added, we found that CuO-Mn 2 O 3 -Fe 2 O 3- based pigments or
The CuO−Cr 2 O 3 −Fe 2 O 3 pigment has a higher coloring density than iron black, and it has a higher color density than iron black.
The present invention was achieved based on the finding that color separation does not occur when a propylene-block copolymer is used for colored molding. [Means for solving the problem] That is, the present invention uses 10 to 40% by weight of inorganic material.
When coloring the containing ethylene/propylene block copolymer with a black pigment, the black pigment may be a CuO-Mn 2 O 3 -Fe 2 O 3 pigment or
This is a polypropylene coloring composition characterized by using a CuO-Cr 2 O 3 -Fe 2 O 3 pigment alone or in combination. The present invention will be explained in more detail below. The ethylene/propylene-block copolymer used in the present invention is commonly called a block copolymer, but it is actually a composition in which an ethylene/propylene copolymer is blended with polypropylene. It is usually produced by multistage polymerization. Usually, a blend of 50-99% by weight of homopolypropylene and 1-50% by weight of ethylene/propylene copolymer is used. That is, propylene is polymerized in a first polymerization tank to produce homopolypropylene, the polymerization solution containing the polypropylene is directly transferred to a second reaction tank, and ethylene gas is supplied to the second reaction tank together with propylene gas. An ethylene-propylene copolymer is produced, and at this time, it is uniformly blended with the homopolypropylene produced in the first reaction tank. The method for producing the ethylene/propylene block copolymer used in the present invention is described in Japanese Patent Publication No. 11623/1980, Japanese Patent Publication No. 11230/1973, Japanese Patent Publication No. 16668/1973, and the like. The present invention can also be applied to an ethylene/propylene block copolymer produced by replacing part of the propylene or ethylene as a raw material in the above production method with an olefin having 4 to 6 carbon atoms. The molecular weight of the ethylene/propylene block copolymer used in the present invention is not particularly limited, but usually
Expressed in MI, a value of about 0.1 to 20 can be used. Examples of the inorganic material used in the present invention include silica, alumina, talc, clay, calcium carbonate, barium sulfate, anhydrite, and the like. These inorganic materials are ethylene and propylene.
It is blended in an amount of 10 to 40% by weight based on the block copolymer. CuO used as black pigment in the present invention
−Mn 2 O 3 −Fe 2 O 3 pigment, CuO−Cr 2 O 3 −Fe 2 O 3
The pigment is used in an amount of 0.1 to 7 parts by weight per 100 parts by weight of the ethylene/propylene block copolymer. In addition, in the present invention, in addition to the above-mentioned black pigment,
Pigments commonly used for conventional plastic coloring, such as organic pigments such as azo, phthalocyanine, quinacridone, anthraquinone, dioxazine, perylene, indigo, and industhrene, cobalt blue, yellow lead, Bengala,
Inorganic pigments such as chromium oxide, gun blue, and navy blue are used. The essential components of the composition of the present invention are the above-mentioned components, but other additives such as various carrier resins, dispersants, ultraviolet absorbers, stabilizers, etc. can be appropriately blended as necessary. The resin composition of the present invention can take various forms, but usually the essential components are mixed in a mixer (Henschel mixer), and then this mixture is melt-kneaded in a kneader such as an extruder to form pellets. It is shaped into. When the resin composition of the present invention thus obtained is molded into various shapes by conventional methods, the molded products have complex shapes and the surface coloration is very uniform. Therefore, color unevenness, which was a drawback of the conventional method, hardly occurs. [Example] The present invention will be explained in more detail with reference to Examples. Example 1 Ethylene containing 8% by weight, MFR 1.8
Using propylene-block copolymer, ethylene/propylene-block copolymer
80 parts by weight Talc 20 parts by weight CuO-Mn 2 O 3 −Fe 2 O 3 black pigment 1.5 parts by weight of the ingredients were mixed uniformly using a mixer (Hensiel mixer) and extruded according to a conventional method. Extrusion molding was performed using a machine to obtain colored pellets. Injection molding machine (Meiki Seisakusho 7o Z )
A plate-shaped molded product of 120 x 100 x 3 mm was formed using the following. (Molding conditions cylinder temperature 220℃, mold temperature 40℃
℃) The appearance of color unevenness on this product was observed. The results are shown in Table 1. Example 2 Using the same ethylene/propylene block copolymer as in Example 1, an ethylene/propylene block copolymer was prepared.
80 parts by weight Talc 20 parts by weight CuO-Cr 2 O 3 -Fe 2 O 3- based black pigment 1.5 parts by weight of the ingredients were mixed uniformly using a mixer (Hensiel mixer) and extruded according to a conventional method. Extrusion molding was performed using a machine to obtain colored pellets. Injection molding machine (Meiki Seisakusho 70 Z )
A plate-shaped molded product of 120 x 100 x 3 mm was formed using the following. (Molding conditions cylinder temperature 220℃, mold temperature 40℃
℃) The appearance of color unevenness on this product was observed. The results are shown in Table 1. Comparative Example 1 Using the same resin as in Example 1, an ethylene/propylene block copolymer was prepared.
80 parts by weight of talc, 20 parts by weight of iron, 1.5 parts by weight of the ingredients were mixed uniformly using a mixer (Henschel mixer), and extrusion molding was performed using an extruder according to a conventional method to obtain colored pellets. . Injection molding machine (Meiki Seisakusho 70 Z )
A plate-shaped molded product of 120 x 100 x 3 mm was formed using the following. (Molding conditions cylinder temperature 220℃, mold temperature 40℃
℃) The appearance of color unevenness on this product was observed. The results are shown in Table 1. Comparative Example 2 Using the same resin, ethylene/propylene block copolymer
80 parts by weight of talc, 20 parts by weight of carbon black, 1.5 parts by weight of the ingredients were mixed uniformly using a mixer (Henschel mixer), and extrusion molding was performed using an extruder according to a conventional method to obtain colored pellets. . Injection molding machine (Meiki Seisakusho 70 Z )
A plate-shaped molded product of 120 x 100 x 3 mm was formed using the following. (Molding conditions cylinder temperature 220℃, mold temperature 40℃
℃) The appearance of color unevenness on this product was observed. The results are shown in Table 1.

【表】 * 成形板の着色濃度の数値は、数が多い程
着色濃度がある。
[Table] * The higher the numerical value of the coloring density of the molded plate, the higher the coloring density.

Claims (1)

【特許請求の範囲】[Claims] 1 無機体質材を10〜40重量%含有するエチレ
ン・プロピレン−ブロツク共重合体を黒色顔料に
よつて着色するに際して、前記黒色顔料として
CuO−Mn2O3−Fe2O3系顔料又はCuO−Cr2O3
Fe2O3系顔料を単独若しくは併用して用いること
を特徴とするポリプロピレン着色組成物。
1 When coloring an ethylene propylene block copolymer containing 10 to 40% by weight of an inorganic substance with a black pigment, as the black pigment
CuO−Mn 2 O 3 −Fe 2 O 3 pigment or CuO−Cr 2 O 3
A polypropylene coloring composition characterized by using Fe 2 O 3 pigments alone or in combination.
JP33102687A 1987-12-25 1987-12-25 Colored polypropylene composition Granted JPH01170637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33102687A JPH01170637A (en) 1987-12-25 1987-12-25 Colored polypropylene composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33102687A JPH01170637A (en) 1987-12-25 1987-12-25 Colored polypropylene composition

Publications (2)

Publication Number Publication Date
JPH01170637A JPH01170637A (en) 1989-07-05
JPH0476384B2 true JPH0476384B2 (en) 1992-12-03

Family

ID=18238992

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33102687A Granted JPH01170637A (en) 1987-12-25 1987-12-25 Colored polypropylene composition

Country Status (1)

Country Link
JP (1) JPH01170637A (en)

Also Published As

Publication number Publication date
JPH01170637A (en) 1989-07-05

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