JP4084875B2 - Plating resin composition and plated molded product - Google Patents

Plating resin composition and plated molded product Download PDF

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Publication number
JP4084875B2
JP4084875B2 JP36587897A JP36587897A JP4084875B2 JP 4084875 B2 JP4084875 B2 JP 4084875B2 JP 36587897 A JP36587897 A JP 36587897A JP 36587897 A JP36587897 A JP 36587897A JP 4084875 B2 JP4084875 B2 JP 4084875B2
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Prior art keywords
plating
monomer
parts
weight
molded product
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JPH11181218A (en
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雅典 伊藤
寛充 青木
秀俊 江川
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Nippon A&L Inc
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Nippon A&L Inc
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Description

【0001】
【発明の属する技術分野】
本発明は、エチレン−プロピレン系ゴムに芳香族ビニル系単量体およびシアン化ビニル系単量体を重合してなるグラフト重合体、いわゆるAES樹脂に特定の粒子径を有する特定のグラフト重合体を配合してなるメッキ用樹脂組成物および該樹脂組成物を成形してなる樹脂成形品にメッキを施してなるメッキ成形品に関するものである。
【0002】
【従来の技術】
アクリロニトリルーブタジエンースチレン樹脂(ABS樹脂)は、従来から金属様外観を付与するためにメッキ装飾を行うケースが非常に多く、また比較的容易にメッキ加工が可能な材料として知られている。
近年、メッキ装飾に対する要望が強まり、成形品全体にメッキを施すだけでなく、一部分のみメッキ加工を施すいゆゆる部分メッキや、また同一成形品に対してメッキと塗装とを併用する等、従来とは異なる仕様が増加しつつある。
特に部分メッキに関しては、一部分の樹脂が意匠面に露出することから、従来使用されていたABS樹脂では耐候性に劣るため、使用できる環境が限定されるという問題があった。
このような問題点に対して、ABS樹脂のゴム成分であるブタジエン成分をエチレン−プロピレン系ゴムに変更してなる耐候性に優れた樹脂である、いわゆるAES樹脂での代替え等が検討されているが、一般的なABS樹脂のメッキ条件ではメッキ金属膜と樹脂との密着性を高めるための手段であるエッチング工程において、エッチングが進みすぎたり(オーバーエッチング)、逆にエッチング不足等の不具合が発生しやすく、ABS樹脂と同等のメッキ性は得られていないのが現状である。
【0003】
【発明が解決しようとする課題】
本発明は、従来のABS樹脂メッキと同様の条件で容易にメッキが可能な改良されたメッキ用AES系樹脂組成物、および該樹脂組成物を成形してなる樹脂成形品にメッキを施してなるメッキ成形品を提供することを目的とするものである。
【0004】
【課題を解決するための手段】
すなわち、本発明は、エチレン−プロピレン系ゴムに芳香族ビニル系単量体およびシアン化ビニル系単量体またはこれらの単量体と共重合可能な他の単量体とを重合してなるグラフト重合体(A)10〜80重量部、重量平均粒子径が0.1〜0.4μmである共役ジエン系ゴムに(メタ)アクリル酸エステル系単量体またはこれと共重合可能な他の単量体とを重合してなるグラフト重合体(B)10〜60重量部および芳香族ビニル系単量体およびシアン化ビニル系単量体またはこれらの単量体と共重合可能な他の単量体とを重合してなる共重合体(C)10〜80重量部((A)+(B)+(C)=100重量部)よりなるメッキ用樹脂組成物および該樹脂組成物を成形してなる樹脂成形品にメッキを施してなるメッキ成形品を提供するものである。
【0005】
【発明の実施の形態】
以下、本発明につき詳細に説明する。
本発明におけるグラフト重合体(A)を構成するエチレン−プロピレン系ゴムとしては、エチレン−プロピレン系共重合体ゴム、エチリデンノルボルネン、ジシクロペンタジエン、1,4−ヘキサジエンなどの非共役ジエン成分を導入してなるエチレン−プロピレン−非共役ジエン共重合体ゴム等が挙げられる。
特にエチレン含有量30〜80重量%、ムーニー粘度(ML1+4 121℃)40〜80のものが好ましい。
【0006】
芳香族ビニル系単量体としては、スチレン、α−メチルスチレン、パラメチルスチレン、ブロムスチレン等が挙げられ、一種又は二種以上用いることができる。特にスチレン、α−メチルスチレンが好ましい。
シアン化ビニル系単量体としてはアクリロニトリル、メタクリロニトリル等が挙げられ、一種又は二種以上用いることができる。
【0007】
本発明においては、上記グラフト重合体(A)を構成する単量体として、芳香族ビニル系単量体およびシアン化ビニル系単量体と共に共重合可能な他の単量体を使用することも可能である。このような単量体としては、メタクリル酸メチル、アクリル酸メチル等の(メタ)アクリル酸エステル系単量体、N−フェニルマレイミド、N−シクロヘキシルマレイミドなどのマレイミド系単量体、アクリル酸、メタクリル酸、イタコン酸、フマル酸などの不飽和カルボン酸が挙げられ、それらはそれぞれ一種又は二種以上用いることができる。
【0008】
上記芳香族ビニル系単量体(i)、シアン化ビニル系単量体(ii)および共重合可能な他の単量体(iii) の組成比率には特に制限はないが、(i)50〜95重量%、(ii)5〜50重量%および(iii) 0〜45重量%であることが好ましい。
また、エチレン−プロピレン系ゴムと単量体(合計)との組成比率についても特に制限はないが、エチレン−プロピレン系ゴムゴム状重合体10〜80重量%および単量体(合計)90〜20重量%であることが好ましい。
【0009】
また、グラフト重合体(A)のグラフト率には特に制限はないが、10〜150%が好ましく、特に成形性と強度のバランスから30〜100%の範囲が好ましい。
【0010】
本発明におけるグラフト重合体(B)を構成する共役ジエン系ゴムとしては、ポリブタジエン、スチレン−ブタジエン共重合体、アクリロニトリル−ブタジエン共重合体等が挙げられる。
該共役ジエン系ゴムの重量平均粒子径は0.1〜0.4μmである。該重量平均粒子径が0.1μm未満ではメッキ工程でのエッチング性に劣るため部分的にメッキが定着しない現象(スキップ)が発生しやすいため好ましくない。また、重量平均粒子径が0.4μmよりも大きい場合、逆にオーバーエッチングになりやすく、メッキ膜と樹脂との密着性が低下するため好ましくない。
メッキ性と強度の面から特に0.20〜0.30μmの範囲が好ましい。
【0011】
(メタ)アクリル酸エステル系単量体としては、(メタ)アクリル酸メチル、(メタ)アクリル酸エチル、(メタ)アクリル酸プロピル、(メタ)アクリル酸ブチル、(メタ)アクリル酸2−エチルヘキシル等が挙げられれ、一種又は二種以上用いることができる。
【0012】
上記(メタ)アクリル酸エステル系単量体と共重合可能な他の単量体としては、スチレン、α−メチルスチレン、パラメチルスチレン、ブロムスチレン等の芳香族ビニル系単量体、アクリロニトリル、メタクリロニトリル等のシアン化ビニル系単量体、さにらはN−フェニルマレイミド、N−シクロヘキシルマレイミドなどのマレイミド系単量体、アクリル酸、メタクリル酸、イタコン酸、フマル酸などの不飽和カルボン酸等が挙げられるが、特に芳香族ビニル系単量体および/またはシアン化ビニル系単量体が好ましい。
【0013】
上記(メタ)アクリル酸エステル系単量体(i)および共重合可能な他の単量体(ii)の組成比率には特に制限はないが、(i)30〜100重量%、(ii)0〜70重量%であることが好ましい。
また、共役ジエン系ゴムと単量体(合計)との組成比率についても特に制限はないが、共役ジエン系ゴム10〜80重量%および単量体(合計)90〜20重量%であることが好ましい。
【0014】
また、グラフト重合体(B)のグラフト率には特に制限はないが、10〜150%が好ましく、特に成形性と強度のバランスから20〜100%の範囲が好ましい。
【0015】
本発明における共重合体(C)を構成する芳香族ビニル系単量体としては、スチレン、α−メチルスチレン、パラメチルスチレン、ブロムスチレン等が挙げられ、一種又は二種以上用いることができる。特にスチレン、α−メチルスチレンが好ましい。
シアン化ビニル系単量体としてはアクリロニトリル、メタクリロニトリル等が挙げられ、一種又は二種以上用いることができる。
【0016】
本発明においては、上記共重合体(C)を構成する芳香族ビニル系単量体およびシアン化ビニル系単量体と共に共重合可能な他の単量体を使用することも可能である。このような単量体としては、メタクリル酸メチル、アクリル酸メチル等の(メタ)アクリル酸エステル系単量体、N−フェニルマレイミド、N−シクロヘキシルマレイミドなどのマレイミド系単量体、アクリル酸、メタクリル酸、イタコン酸、フマル酸などの不飽和カルボン酸が挙げられ、それらはそれぞれ一種又は二種以上用いることができる。
【0017】
上記芳香族ビニル系単量体(i)、シアン化ビニル系単量体(ii)および共重合可能な他の単量体(iii) の組成比率には特に制限はないが、(i)50〜95重量%、(ii)5〜50重量%および(iii) 0〜45重量%であることが好ましい。
【0018】
また、共重合体(C)の固有粘度(30℃、ジメチルホルムアミド)には特に制限はないが、0.4〜1.0であることが好ましい。
【0019】
本発明で用いられる上記グラフト重合体(A)および(B)、さらに共重合体(C)の重合方法には制限は無く、公知の乳化重合法、塊状重合法、溶液重合法、懸濁重合法あるいはこれらの重合法を任意に組み合わせた方法を採用することができる。
【0020】
本発明の樹脂組成物は、上記グラフト重合体(A)10〜80重量部、グラフト重合体(B)10〜60重量部および共重合体(C)10〜80重量部((A)+(B)+(C)=100重量部)からなる。樹脂組成物の混合割合が該範囲外では良好なメッキ性が得られないため好ましくない。
また、該樹脂組成物中に占める(A)成分および(B)成分からもたらされるゴム成分の割合は10〜40重量%であることが好ましく、該割合が10重量%未満では成形品の強度が低下すると共にエッチング不足になり易く、また40重量%を超えると成形性が低下すると共にオーバーエッチングになり易く、メッキ膜と樹脂との密着性が低下するため好ましくない。
【0021】
本発明の樹脂組成物には、必要に応じて、ポリカーボネート、ポリエステル、ポリフェニレンエーテル、ポリアミド等の他の樹脂、着色剤、分散剤、酸化防止剤、紫外線吸収剤、難燃剤等の各種添加剤、あるいはガラス繊維、カーボン繊維、炭酸カルシウム等の各種補強材等を加えることができる。
また本発明の樹脂組成物の混合は、通常使用されるロール、バンバリーミキサー、押出機、ニーダー等公知の方法で実施できる。
【0022】
このようにして得られた樹脂組成物は、射出成形、押出成形、圧縮成形、射出圧縮成形、ブロー成形等により成形され、得られた樹脂成形品は、公知のメッキ方法、例えば通常のABS樹脂のメッキ条件と同様の条件にてメッキ加工される。
【0023】
〔実施例〕
以下に実施例を用いて本発明を具体的に説明するが、本発明はこれらによって何ら制限されるものではない。なお、実施例中にて示す部および%は重量に基づくものである。
【0024】
−グラフト重合体(A)−
A−1:エチレン−プロピレン−エチリデンノルボルネンゴム(エチレン含有量60重量%、ムーニー粘度65)50重量部、スチレン35部およびアクリロニトリル15部を公知の溶液重合法によりグラフト重合し、グラフト重合体(A−1)を得た。
【0025】
−グラフト重合体(B)−
B−1:スチレン−ブタジエン共重合体ゴム(重量平均粒子径0.25μm)50部、メタクリル酸メチル45部およびアクリル酸エチル5部を公知の乳化重合法によりグラフト重合し、グラフト重合体(B−1)を得た。
B−2:ポリブタジエンゴム(重量平均粒子径0.40μm)60部、メタクリル酸メチル25部、スチレン10部およびアクリロニトリル5部を公知の乳化重合法によりグラフト重合し、グラフト重合体(B−2)を得た。
B−3:ポリブタジエンゴム(重量平均粒子径0.30μm)40部、メタクリル酸メチル45部およびアクリロニトリル15部を公知の乳化重合法によりグラフト重合し、グラフト重合体(B−3)を得た。
B−4:ポリブタジエンゴム(重量平均粒子径0.20μm)50部、メタクリル酸メチル30部およびスチレン20部を公知の乳化重合法によりグラフト重合し、グラフト重合体(B−4)を得た。
B−i:ポリブタジエンゴム(重量平均粒子径0.05μm)50部、メタクリル酸メチル30部およびスチレン20部を公知の乳化重合法によりグラフト重合し、グラフト重合体(B−i)を得た。
B−ii:ポリブタジエンゴム(重量平均粒子径0.50μm)50部、メタクリル酸メチル30部およびスチレン20部を公知の乳化重合法によりグラフト重合し、グラフト重合体(B−ii)を得た。
B−iii:ポリブタジエンゴム(重量平均粒子径0.40μm)50部、アクリロニトリル15部およびスチレン35部を公知の乳化重合法によりグラフト重合し、グラフト重合体(B−iii)を得た。
【0026】
−共重合体(C)−
C−1:スチレン75部およびアクリロニトリル25部を公知の塊状重合法により重合し、共重合体(C−1)を得た。
【0027】
〔実施例1〜7および比較例1〜4〕
上記のグラフト共重合体(A−1)、グラフト共重合体(B−1〜4、B〜i〜iii )および共重合体(C−1)を表1に示す配合割合で混合し、40mm二軸押出機を用いて230℃で溶融混合、ペレットとした後、射出成形機にてメッキ用成形品(100×50×3mm)を成形し、得られた成形品につき耐光性を測定した。また、以下の方法にてメッキを施し、メッキ成形品を得た。以下の方法により、各特性を測定した。結果を表1に示す。
【0028】
メッキ処理プロセス:▲1▼脱脂(界面活性剤水溶液、55℃×3分間)、▲2▼エッチング(硫酸−無水クロム酸混液、65〜70℃×15分間)、▲3▼中和(塩酸水溶液、室温×3分間)、▲4▼キャタリスト(塩化パラジウム−塩化第一スズ−塩酸水溶液、室温×2分間)、▲5▼アクセレーター(硫酸水溶液、45℃×3分間)、▲6▼無電解メッキ(硫酸ニッケル−次亜燐酸ソーダ−クエン酸ソーダを主体とするニッケルメッキ液)、▲7▼電気メッキ(硫酸銅浴→硫酸ニッケル浴→無水クロム酸浴)
【0029】
oエッチング後の表面光沢:上記▲2▼エッチング後、ハンディ光沢計((株)堀場製作所製 グロスチェッカIG−310)で表面光沢(%)を測定した。
oピーリング強度:JIS H−8630に基づき、メッキ膜の密着強度(メッキ成形品の金属膜に基材に達する1cm間隔の切傷を入れ、金属膜を垂直な方向に引き剥がす時の応力で示した)を測定した(kg/cm2 )。
o成形品外観:メッキ後の外観(メッキ未着)を目視により、以下の判定基準にて判定した。
○;全体にメッキが着いており良好。
△;一部メッキ未着の状態でやや不良。
×;メッキ未着の状態で不良。
o耐光性:耐光性測定用試験片(100×50×3mm)をFOM(スガ試験機製)を用いて63℃にて400時間の耐光性試験を実施した後、試験片を色差計(スガ試験機製)により(ΔE)を測定した。
【0030】
【表1】

Figure 0004084875
【0031】
【発明の効果】
本発明における樹脂組成物は、耐候性に優れたAES系樹脂組成物であって、従来のABS樹脂メッキと同様の条件で容易にメッキが可能なメッキ性に優れた樹脂組成物であり、部分メッキであっても環境(屋外)に制限されることなく使用できるものであり、各種メッキ成形品として有効に利用できる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a graft polymer obtained by polymerizing an aromatic vinyl monomer and a vinyl cyanide monomer on ethylene-propylene rubber, a so-called AES resin having a specific graft polymer having a specific particle size. The present invention relates to a resin composition for plating obtained by blending and a plated molded product obtained by plating a resin molded product obtained by molding the resin composition.
[0002]
[Prior art]
Acrylonitrile-butadiene-styrene resin (ABS resin) is conventionally known as a material that can be plated and decorated in order to give a metal-like appearance and can be plated relatively easily.
In recent years, there has been a growing demand for plating decorations, not only plating the entire molded product, but also slow partial plating that applies plating to only a part, and using both plating and painting for the same molded product. Different specifications are increasing.
In particular, regarding partial plating, since a part of the resin is exposed on the design surface, the conventionally used ABS resin is inferior in weather resistance, so that there is a problem that the usable environment is limited.
In order to solve such a problem, a replacement with a so-called AES resin, which is a resin having excellent weather resistance obtained by changing the butadiene component, which is a rubber component of the ABS resin, to an ethylene-propylene rubber has been studied. However, in the general ABS resin plating conditions, in the etching process, which is a means for improving the adhesion between the plated metal film and the resin, problems such as excessive etching (overetching) and conversely insufficient etching occur. The present condition is that it is easy to do and the plating property equivalent to ABS resin is not obtained.
[0003]
[Problems to be solved by the invention]
The present invention is obtained by plating an improved AES resin composition for plating that can be easily plated under the same conditions as conventional ABS resin plating, and a resin molded product obtained by molding the resin composition. The object is to provide a plated molded product.
[0004]
[Means for Solving the Problems]
That is, the present invention relates to a graft obtained by polymerizing an ethylene-propylene rubber with an aromatic vinyl monomer and a vinyl cyanide monomer or another monomer copolymerizable with these monomers. 10 to 80 parts by weight of the polymer (A) and a conjugated diene rubber having a weight average particle size of 0.1 to 0.4 μm are added to a (meth) acrylic acid ester monomer or another monomer copolymerizable therewith. 10-60 parts by weight of a graft polymer (B) obtained by polymerizing a monomer and an aromatic vinyl monomer and a vinyl cyanide monomer or other monomer copolymerizable with these monomers A resin composition for plating comprising 10 to 80 parts by weight ((A) + (B) + (C) = 100 parts by weight) of a copolymer (C) formed by polymerizing the resin and the resin composition are molded Providing plated molded products made by plating resin molded products Than is.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail.
As the ethylene-propylene rubber constituting the graft polymer (A) in the present invention, non-conjugated diene components such as ethylene-propylene copolymer rubber, ethylidene norbornene, dicyclopentadiene, 1,4-hexadiene are introduced. And ethylene-propylene-nonconjugated diene copolymer rubber.
Particularly preferred are those having an ethylene content of 30 to 80% by weight and a Mooney viscosity (ML1 + 4 121 ° C.) of 40 to 80.
[0006]
Examples of the aromatic vinyl monomer include styrene, α-methylstyrene, paramethylstyrene, bromostyrene, and the like, and one or two or more types can be used. In particular, styrene and α-methylstyrene are preferable.
Examples of the vinyl cyanide monomer include acrylonitrile and methacrylonitrile, and one or more of them can be used.
[0007]
In the present invention, as the monomer constituting the graft polymer (A), other monomers copolymerizable with the aromatic vinyl monomer and the vinyl cyanide monomer may be used. Is possible. Examples of such monomers include (meth) acrylic acid ester monomers such as methyl methacrylate and methyl acrylate, maleimide monomers such as N-phenylmaleimide and N-cyclohexylmaleimide, acrylic acid, and methacrylic acid. Examples thereof include unsaturated carboxylic acids such as acid, itaconic acid and fumaric acid, and these can be used alone or in combination of two or more.
[0008]
The composition ratio of the aromatic vinyl monomer (i), the vinyl cyanide monomer (ii) and the other copolymerizable monomer (iii) is not particularly limited, but (i) 50 It is preferred to be -95 wt%, (ii) 5-50 wt% and (iii) 0-45 wt%.
Further, the composition ratio between the ethylene-propylene rubber and the monomer (total) is not particularly limited, but the ethylene-propylene rubber rubber-like polymer is 10 to 80% by weight and the monomer (total) 90 to 20%. % Is preferred.
[0009]
Further, the graft ratio of the graft polymer (A) is not particularly limited, but is preferably 10 to 150%, and more preferably 30 to 100% from the balance between moldability and strength.
[0010]
Examples of the conjugated diene rubber constituting the graft polymer (B) in the present invention include polybutadiene, styrene-butadiene copolymer, acrylonitrile-butadiene copolymer and the like.
The conjugated diene rubber has a weight average particle size of 0.1 to 0.4 μm. If the weight average particle diameter is less than 0.1 μm, the etching property in the plating process is poor and the phenomenon that the plating is not fixed partially (skip) is likely to occur. On the other hand, when the weight average particle size is larger than 0.4 μm, overetching is liable to occur, and the adhesion between the plating film and the resin is lowered, which is not preferable.
A range of 0.20 to 0.30 μm is particularly preferable in terms of plating properties and strength.
[0011]
Examples of (meth) acrylic acid ester monomers include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate. Can be used, and one kind or two or more kinds can be used.
[0012]
Other monomers copolymerizable with the above (meth) acrylic acid ester monomers include aromatic vinyl monomers such as styrene, α-methylstyrene, paramethylstyrene, bromostyrene, acrylonitrile, methacrylate. Vinyl cyanide monomers such as nitrile, Sarasa maleimide monomers such as N-phenylmaleimide and N-cyclohexylmaleimide, and unsaturated carboxylic acids such as acrylic acid, methacrylic acid, itaconic acid and fumaric acid In particular, aromatic vinyl monomers and / or vinyl cyanide monomers are preferable.
[0013]
The composition ratio of the (meth) acrylic acid ester monomer (i) and the other copolymerizable monomer (ii) is not particularly limited, but (i) 30 to 100% by weight, (ii) It is preferably 0 to 70% by weight.
The composition ratio between the conjugated diene rubber and the monomer (total) is not particularly limited, but is 10 to 80% by weight of the conjugated diene rubber and 90 to 20% by weight of the monomer (total). preferable.
[0014]
The graft ratio of the graft polymer (B) is not particularly limited, but is preferably 10 to 150%, and particularly preferably 20 to 100% from the balance between moldability and strength.
[0015]
Examples of the aromatic vinyl monomer constituting the copolymer (C) in the present invention include styrene, α-methylstyrene, paramethylstyrene, bromostyrene, and the like, and one or more of them can be used. In particular, styrene and α-methylstyrene are preferable.
Examples of the vinyl cyanide monomer include acrylonitrile and methacrylonitrile, and one or more of them can be used.
[0016]
In this invention, it is also possible to use the other monomer copolymerizable with the aromatic vinyl-type monomer and vinyl cyanide-type monomer which comprise the said copolymer (C). Examples of such monomers include (meth) acrylic acid ester monomers such as methyl methacrylate and methyl acrylate, maleimide monomers such as N-phenylmaleimide and N-cyclohexylmaleimide, acrylic acid, and methacrylic acid. Examples thereof include unsaturated carboxylic acids such as acid, itaconic acid and fumaric acid, and these can be used alone or in combination of two or more.
[0017]
The composition ratio of the aromatic vinyl monomer (i), the vinyl cyanide monomer (ii) and the other copolymerizable monomer (iii) is not particularly limited, but (i) 50 It is preferred to be -95 wt%, (ii) 5-50 wt% and (iii) 0-45 wt%.
[0018]
The intrinsic viscosity (30 ° C., dimethylformamide) of the copolymer (C) is not particularly limited, but is preferably 0.4 to 1.0.
[0019]
There is no restriction | limiting in the polymerization method of the said graft polymers (A) and (B) used by this invention, and also a copolymer (C), The well-known emulsion polymerization method, block polymerization method, solution polymerization method, suspension weight A combination method or a combination of these polymerization methods can be employed.
[0020]
The resin composition of the present invention comprises 10-80 parts by weight of the graft polymer (A), 10-60 parts by weight of the graft polymer (B) and 10-80 parts by weight of the copolymer (C) ((A) + ( B) + (C) = 100 parts by weight). If the mixing ratio of the resin composition is outside this range, it is not preferable because good plating properties cannot be obtained.
Further, the proportion of the rubber component derived from the component (A) and the component (B) in the resin composition is preferably 10 to 40% by weight, and if the proportion is less than 10% by weight, the strength of the molded product is low. When the amount is more than 40% by weight, the moldability is lowered and overetching is liable to occur, and the adhesion between the plating film and the resin is lowered.
[0021]
In the resin composition of the present invention, if necessary, other resins such as polycarbonate, polyester, polyphenylene ether, polyamide and the like, colorants, dispersants, antioxidants, ultraviolet absorbers, flame retardants and the like, Alternatively, various reinforcing materials such as glass fiber, carbon fiber, and calcium carbonate can be added.
Moreover, mixing of the resin composition of this invention can be implemented by well-known methods, such as a roll used normally, a Banbury mixer, an extruder, and a kneader.
[0022]
The resin composition thus obtained is molded by injection molding, extrusion molding, compression molding, injection compression molding, blow molding or the like, and the resulting resin molded product is obtained by a known plating method such as a normal ABS resin. The plating is performed under the same conditions as the plating conditions.
[0023]
〔Example〕
EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited by these. In addition, the part and% which are shown in an Example are based on a weight.
[0024]
-Graft polymer (A)-
A-1: 50 parts by weight of ethylene-propylene-ethylidene norbornene rubber (ethylene content 60% by weight, Mooney viscosity 65), 35 parts of styrene and 15 parts of acrylonitrile were graft-polymerized by a known solution polymerization method to obtain a graft polymer (A -1) was obtained.
[0025]
-Graft polymer (B)-
B-1: Graft-polymerized 50 parts of styrene-butadiene copolymer rubber (weight average particle diameter 0.25 μm), 45 parts of methyl methacrylate and 5 parts of ethyl acrylate by a known emulsion polymerization method to produce a graft polymer (B -1) was obtained.
B-2: 60 parts of polybutadiene rubber (weight average particle size 0.40 μm), 25 parts of methyl methacrylate, 10 parts of styrene and 5 parts of acrylonitrile were graft-polymerized by a known emulsion polymerization method to obtain a graft polymer (B-2) Got.
B-3: 40 parts of polybutadiene rubber (weight average particle diameter 0.30 μm), 45 parts of methyl methacrylate and 15 parts of acrylonitrile were graft polymerized by a known emulsion polymerization method to obtain a graft polymer (B-3).
B-4: 50 parts of polybutadiene rubber (weight average particle diameter 0.20 μm), 30 parts of methyl methacrylate and 20 parts of styrene were graft-polymerized by a known emulsion polymerization method to obtain a graft polymer (B-4).
Bi: 50 parts of polybutadiene rubber (weight average particle diameter 0.05 μm), 30 parts of methyl methacrylate and 20 parts of styrene were graft polymerized by a known emulsion polymerization method to obtain a graft polymer (Bi).
B-ii: 50 parts of polybutadiene rubber (weight average particle diameter 0.50 μm), 30 parts of methyl methacrylate and 20 parts of styrene were graft polymerized by a known emulsion polymerization method to obtain a graft polymer (B-ii).
B-iii: 50 parts of polybutadiene rubber (weight average particle size 0.40 μm), 15 parts of acrylonitrile and 35 parts of styrene were graft-polymerized by a known emulsion polymerization method to obtain a graft polymer (B-iii).
[0026]
-Copolymer (C)-
C-1: 75 parts of styrene and 25 parts of acrylonitrile were polymerized by a known bulk polymerization method to obtain a copolymer (C-1).
[0027]
[Examples 1-7 and Comparative Examples 1-4]
The above graft copolymer (A-1), graft copolymer (B-1 to 4, B to i to iii) and copolymer (C-1) were mixed at the blending ratio shown in Table 1, and 40 mm. After being melt-mixed and pelletized at 230 ° C. using a twin screw extruder, a molded product for plating (100 × 50 × 3 mm) was molded with an injection molding machine, and the light resistance of the obtained molded product was measured. Also, plating was performed by the following method to obtain a plated molded product. Each characteristic was measured by the following method. The results are shown in Table 1.
[0028]
Plating treatment process: (1) Degreasing (surfactant aqueous solution, 55 ° C. × 3 minutes), (2) Etching (sulfuric acid-chromic anhydride mixed solution, 65-70 ° C. × 15 minutes), (3) Neutralization (hydrochloric acid aqueous solution) , Room temperature × 3 minutes), 4) catalyst (palladium chloride-stannous chloride-hydrochloric acid aqueous solution, room temperature × 2 minutes), 5) accelerator (aqueous sulfuric acid solution, 45 ° C. × 3 minutes), 6) none Electrolytic plating (nickel plating solution consisting mainly of nickel sulfate, sodium hypophosphite and sodium citrate), (7) electroplating (copper sulfate bath → nickel sulfate bath → anhydrous chromic acid bath)
[0029]
o Surface gloss after etching: (2) After etching, the surface gloss (%) was measured with a handy gloss meter (Gloss Checker IG-310, manufactured by Horiba, Ltd.).
o Peeling strength: Based on JIS H-8630, the adhesion strength of the plating film (indicated by the stress when the metal film of the plating molded product is cut at intervals of 1 cm reaching the base material and the metal film is peeled off in the vertical direction. ) Was measured (kg / cm 2 ).
o Molded product appearance: The appearance after plating (unplated) was visually determined according to the following criteria.
○: Good overall plating.
Δ: Slightly defective with some plating not applied.
X: Defect in a state where plating is not applied.
o Light resistance: A light resistance measurement test piece (100 × 50 × 3 mm) was subjected to a light resistance test for 400 hours at 63 ° C. using a FOM (manufactured by Suga Test Instruments), and then the test piece was subjected to a color difference meter (Suga test). (ΔE) was measured.
[0030]
[Table 1]
Figure 0004084875
[0031]
【The invention's effect】
The resin composition in the present invention is an AES resin composition excellent in weather resistance, and is a resin composition excellent in plating properties that can be easily plated under the same conditions as conventional ABS resin plating. Even plating can be used without being limited to the environment (outdoors), and can be effectively used as various plated products.

Claims (1)

エチレン−プロピレン系ゴムに芳香族ビニル系単量体およびシアン化ビニル系単量体またはこれらの単量体と共重合可能な他の単量体とを重合してなるグラフト重合体(A)10〜80重量部、重量平均粒子径が0.20〜0.30μmである共役ジエン系ゴムに(メタ)アクリル酸エステル系単量体またはこれと共重合可能な他の単量体とを重合してなるグラフト重合体(B)10〜60重量部および芳香族ビニル系単量体およびシアン化ビニル系単量体またはこれらの単量体と共重合可能な他の単量体とを重合してなる共重合体(C)10〜80重量部((A)+(B)+(C)=100重量部)よりなる樹脂組成物(ただし、ポリカーボネート樹脂を除く)を成形してなる樹脂成形品にメッキを施してなるメッキ成形品。 Graft polymer (A) 10 formed by polymerizing an aromatic vinyl monomer and a vinyl cyanide monomer or another monomer copolymerizable with these monomers on ethylene-propylene rubber A conjugated diene rubber having a weight average particle diameter of 0.20 to 0.30 μm is polymerized with a (meth) acrylic acid ester monomer or another monomer copolymerizable therewith. 10 to 60 parts by weight of the graft polymer (B) and an aromatic vinyl monomer and a vinyl cyanide monomer or other monomers copolymerizable with these monomers are polymerized. Resin molded product formed by molding a resin composition (excluding polycarbonate resin ) comprising 10 to 80 parts by weight of the copolymer (C) ((A) + (B) + (C) = 100 parts by weight) Plating molded product made by plating on
JP36587897A 1997-12-22 1997-12-22 Plating resin composition and plated molded product Expired - Fee Related JP4084875B2 (en)

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