JP2004107467A - High-cycle moldable polyamide resin composition with good appearance and molded product thereof - Google Patents

High-cycle moldable polyamide resin composition with good appearance and molded product thereof Download PDF

Info

Publication number
JP2004107467A
JP2004107467A JP2002271075A JP2002271075A JP2004107467A JP 2004107467 A JP2004107467 A JP 2004107467A JP 2002271075 A JP2002271075 A JP 2002271075A JP 2002271075 A JP2002271075 A JP 2002271075A JP 2004107467 A JP2004107467 A JP 2004107467A
Authority
JP
Japan
Prior art keywords
polyamide resin
weight
parts
resin composition
polyamide
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
Application number
JP2002271075A
Other languages
Japanese (ja)
Inventor
Makoto Kobayashi
小林 誠
Shoichi Wakatake
若竹 昌一
Makoto Wada
和田 誠
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.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
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 Toray Industries Inc filed Critical Toray Industries Inc
Priority to JP2002271075A priority Critical patent/JP2004107467A/en
Publication of JP2004107467A publication Critical patent/JP2004107467A/en
Pending legal-status Critical Current

Links

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polyamide resin composition realizing high-cycle moldability despite being of good appearance and excellent in molding processability. <P>SOLUTION: The polyamide resin composition comprises 100 pts. wt. of a polyamide resin and 10-100 pts. wt. of melamine polyphosphate, wherein the polyamide resin consists of a copolymer composed of 70-90 wt.% of hexamethylene adipamide units and 10-30 wt.% of hexamethylene isophthalamide units and/or a blend of such copolymers. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は良外観成形品をハイサイクルで成形可能な強化ポリアミド樹脂組成物に関する。
【0002】
【従来の技術】
従来、ポリアミド樹脂は、引張、曲げ等の強度、弾性率などの機械的性質に優れ、しかも耐熱性、耐薬品性、難燃性が良好であることから、電気電子部品、自動車用部品、建材部品、機械部品等に広く利用されている。
【0003】
しかしながら、ポリアミド樹脂に無機強化剤を配合すると、その無機強化剤が表面に浮き出し、外観を著しく損なう弱点があった。外装部品など良外観性が要求される用途については、機械物性と良外観性を兼ね備えた材料の検討がなされている。
【0004】
例えば特許文献1には、共重合ポリアミド樹脂を用いることで、高い機械特性と良外観性を実現することが提案されているが、共重合ポリアミドは固化が遅いため、成形サイクルが長くなり、成形生産性に対して非常に困難があった。また、特許文献2には、白化の無いポリアミドフィルムを提供するという目的を損なわない範囲で少量のポリリン酸メラミンを配合する事が提案されているが、成形サイクルを短くするという思想は皆無であり、また、白化を起こさない程度の配合量では成形サイクルを向上させる事は出来ない。
【0005】
【特許文献1】
特開2000−219808号公報([0002]〜[0003]段落)
【特許文献2】
特開2000−109689号公報([0003]〜[0013]段落)
【0006】
【発明が解決しようとする課題】
本発明は良外観性でありながら、かつハイサイクル成形性を実現し、成形加工性に優れたポリアミド樹脂組成物を提供することを目的とする。
【0007】
【課題を解決するための手段】
そこで本発明者らは上記の課題を解決すべく鋭意検討した結果、共重合ポリアミド樹脂にポリリン酸メラミンを配合した結果、前記目的を達成し得ることを見いだし本発明に到達した。
【0008】
すなわち本発明は、
(1)(a1)ヘキサメチレンアジパミド単位70〜90重量%と(a2)ヘキサメチレンイソフタラミド単位10〜30重量%との共重合体および/または混合物からなる(A)ポリアミド樹脂であって、前記(A)ポリアミド樹脂100重量部に対して、(B)ポリリン酸メラミン10〜100重量部を主要成分として含有することを特徴とするポリアミド樹脂組成物。
【0009】
(2)(A)ポリアミド樹脂100重量部に対して、さらに(C)無機強化剤を5〜250重量部配合してなることを特徴とする請求項1記載のポリアミド樹脂組成物。
【0010】
(3)(A)ポリアミド樹脂の相対粘度が1.5〜7.0であることを特徴とする(1)または(2)記載のポリアミド樹脂組成物。
【0011】
(4)(C)無機充填剤がガラス繊維、ワラステナイト、タルクから選ばれた少なくとも1種であることを特徴とする(1)〜(3)いずれか記載のポリアミド樹脂組成物。
【0012】
(5)(1)〜(4)いずれか記載のポリアミド樹脂組成物を、射出成形、押出成形、ブロー成形の内から選ばれる少なくとも一種の方法で成形してなることを特徴とする成形品。
【0013】
(6)(5)記載の成形品が外装部品であることを特徴とする成形品。
【0014】
(7)(6)記載の外装部品が自動車部品、電気電子部品、建材、玩具のうち選ばれたいずれか1種であることを特徴とする外装部品。
により構成される。
【0015】
【発明の実施の形態】
以下、本発明の実施の形態を説明する。本発明において「重量」とは「質量」を意味する。
【0016】
本発明で用いられる(A)ポリアミド樹脂とは、(a1)ヘキサメチレンアジパミド(以下「N66」という)単位70〜90重量%と(a2)ヘキサメチレンイソフタラミド(以下「N6I」という)単位10〜30重量%を主たる構成成分とするポリアミド共重合体および/または混合物である。
【0017】
N6I単位は10〜30重量%であることが必要がある。10重量%を下回ると良外観性が損なわれ、30重量%を越えるとハイサイクル性が損なわれる。特に好ましくは10〜25重量%である。
【0018】
これらポリアミド樹脂の重合度には特に制限がないが、サンプル濃度0.01g/mlの98%濃硫酸溶液中、25℃で測定した相対粘度としては、1.5〜7.0の範囲のものが好ましく、特に1.8〜6.0の範囲のポリアミド樹脂が好ましい。
【0019】
本発明の(B)ポリリン酸メラミンのリン酸部分の重合度は通常2〜30であるが特に制限はない。(B)ポリリン酸メラミンのリン含有量は1〜25重量%の範囲のものが好ましい。1重量%を下回るとハイサイクル性が損なわれ、25重量%を越えると、良外観性が損なわれることがあるからである。特に5〜20重量%のものが好ましい。
【0020】
本発明に用いる(C)無機充填剤としては、特に限定されるものではないが、繊維状、板状、粉末状、粒状などの充填材を使用することができる。具体的には、ガラス繊維、PAN系やピッチ系の炭素繊維、ステンレス繊維、アルミニウム繊維や黄銅繊維などの金属繊維、芳香族ポリアミド繊維などの有機繊維、石膏繊維、セラミック繊維、アスベスト繊維、ジルコニア繊維、アルミナ繊維、シリカ繊維、酸化チタン繊維、炭化ケイ素繊維、ロックウール、チタン酸カリウムウィスカー、窒化ケイ素ウィスカーなどの繊維状、ウィスカー状充填材、ワラステナイト、セリサイト、カオリン、マイカ、クレー、ベントナイト、アスベスト、タルク、アルミナシリケートなどの珪酸塩、モンモリロナイト、合成雲母などの膨潤性の層状珪酸塩、アルミナ、酸化珪素、酸化マグネシウム、酸化ジルコニウム、酸化チタン、酸化鉄などの金属化合物、炭酸カルシウム、炭酸カルシウム、炭酸マグネシウム、ドロマイトなどの炭酸塩、硫酸カルシウム、硫酸バリウムなどの硫酸塩、ガラス・ビーズ、セラミックビーズ、窒化ホウ素、炭化珪素、燐酸カルシウムおよびシリカなどの非繊維状充填剤が挙げられる。上記充填材中、ガラス繊維、マイカ、タルク、焼成カオリン、ウォラストナイトおよび導電性が必要な場合にはPAN系の炭素繊維が好ましく使用される。ガラス繊維の種類は、一般に樹脂の強化用に用いるものなら特に限定はなく、例えば長繊維タイプや短繊維タイプのチョップドストランド、ミルドファイバーなどから選択して用いることができる。また、上記の充填材は2種以上を併用して使用することもできる。なお、本発明に使用する上記の充填材はその表面を公知のカップリング剤(例えば、シラン系カップリング剤、チタネート系カップリング剤など)、その他の表面処理剤および膨潤性の層状珪酸塩では有機化オニウムイオンで予備処理することは、より優れた機械的強度、を得る意味において好ましい。
【0021】
また、ガラス繊維はエチレン/酢酸ビニル共重合体などの熱可塑性樹脂、エポキシ樹脂などの熱硬化性樹脂で被膜あるいは集束されていてもよい。
【0022】
本発明のポリアミド樹脂組成物は(A)ポリアミド樹脂100重量部に対して、(B)ポリリン酸メラミンは10〜100重量部の範囲であることが必要である。10重量部未満ではハイサイクル性が損なわれ、100重量部を超えると成形品の機械物性が損なわれる。
【0023】
また、本発明のポリアミド樹脂組成物は、(A)ポリアミド樹脂100重量部に対して(C)無機充填剤は5〜250重量部であることが好ましい。5重量部未満では成形品の機械物性が損なわれ、250重量部を超えると成形時の流動性が損なわれるばかりか機械物性の改良も認められない場合があるからである。成形時の流動性と機械特性のバランスから好ましい範囲としては10〜200重量部が望ましい。
【0024】
本発明のポリアミド樹脂組成物製造方法は特に制限はなく、ポリアミド樹脂、ポリリン酸メラミン、また無機充填剤を単軸または2軸の押出機やニーダー等の混練機を用いて220〜330℃の温度で溶融混練する方法等であって良い。
【0025】
また、本発明のポリアミド樹脂には、さらに本発明の目的を損なわない範囲で銅系熱安定剤、ヒンダードフェノール系、リン系、イオウ系などの酸化防止剤、熱安定剤、紫外線吸収剤、滑剤、離型剤、帯電防止剤、および染料・顔料を含む着色剤などの通常の添加剤を1種以上添加することができる。
【0026】
本発明の組成物は、射出成形、押出成形、ブロー成形のいずれかの方法によって自動車部品、電気電子部品、建材、玩具、一般機器などの外装部品に成形できる。
【0027】
【実施例】
以下、実施例を挙げてさらに本発明を詳細に説明するが、本発明はこれらにより限定されるものではない。実施例および比較例に用いた測定方法を以下に示す。
【0028】
(1)ハイサイクル性
射出成形機(東芝機械社製:IS80)を用いて1mmφピンゲート成形品を射出時間を変化させて成形し、成形品の重量変化が無くなる射出時間からゲートシール時間を確認した。
【0029】
(2)良外観性
射出成形機(東芝機械社製:IS80)を用いて80mm×80mm×3mmの角板を成形し、肉眼でフィラーの浮きを観察し、その外観を評価した。評価基準は以下の通りである。
◎:フィラーの浮きがほとんど見られない。
○:フィラーの浮きがわずかに見られる。
×:フィラーの浮きが著しく見られる。
【0030】
(3)硫酸相対粘度
JIS−K6810に従って98%硫酸での相対粘度を測定した。
【0031】
(4)引張強さ
ASTM D638の標準方法に従って測定した。
【0032】
実施例1〜6、比較例1〜2、5〜6
66共重合比率が80重量%の66/6I共重合ポリアミドは次の重合法により製造した。ヘキサメチレンジアミンとアジピン酸の当モル塩ヘキサメチレンジアミンとイソフタル酸の当モル塩をそれぞれ表1に示す比で投入し、投入した全原料と同量の純水を加え、重合缶内を充分Nで置換した後、攪拌しながら開始し、缶内圧力を最大20kg/cmに調整しながら最終到達温度を270℃とした。水浴中に吐出したポリマーをストランドカッターでペレタイズした。
【0033】
実施例1
硫酸相対粘度2.0で66共重合比率が80重量%の66/6I共重合ポリアミドを100重量部、ポリリン酸メラミン[日産化学(株)製:商品名PMP−100]を33重量部を2軸押出機(東芝機械社製:TEM58)を用いてシリンダ設定温度270℃、スクリュ回転数200rpmの条件下でポリアミド樹脂とポリリン酸メラミンをトップフィード(基込めフィード)して混練りし、ストランド状のガットを成形し、冷バスで冷却後カッターで造粒しペレットを得た。得られたペレットを前記の測定方法によって諸特性を調べた。その結果を表1に示す。
【0034】
実施例2
硫酸相対粘度2.0で66共重合比率が80重量%の66/6I共重合ポリアミドを100重量部、ポリリン酸メラミンを27重量部にガラス繊維[日本板硝子 (株)製:商品名TP−67]55重量部の配合処方で、ガラス繊維をサイドフィードした以外は実施例1と同様にしてペレットを得た。その結果を表1に示す。
【0035】
実施例3
硫酸相対粘度2.0で66共重合比率が80重量%の66/6I共重合ポリアミドを100重量部、ポリリン酸メラミンを50重量部を実施例1と同様にしてペレットを得た。その結果を表1に示す。
【0036】
実施例4
硫酸相対粘度2.0で66共重合比率が80重量%の66/6I共重合ポリアミドを100重量部、ポリリン酸メラミンを75重量部にガラス繊維75重量部の配合処方で、実施例2と同様にしてペレットを得た。その結果を表1に示す。
【0037】
実施例5
硫酸相対粘度2.0で66共重合比率が75重量%の66/6I共重合ポリアミドを100重量部、ポリリン酸メラミンを33重量部を実施例1と同様にしてペレットを得た。その結果を表1に示す。
【0038】
実施例6
硫酸相対粘度2.0で66共重合比率が75重量%の66/6I共重合ポリアミドを100重量部、ポリリン酸メラミンを27重量部にガラス繊維55重量部の配合処方で、実施例2と同様にしてペレットを得た。その結果を表1に示す。
【0039】
比較例1
硫酸相対粘度2.0で66共重合比率が80重量%の66/6I共重合ポリアミドを使用し、前記の測定方法によって諸特性を調べた。その結果を表1に示す。
【0040】
比較例2
硫酸相対粘度2.0で66共重合比率が80重量%の66/6I共重合ポリアミドを70重量部、ガラス繊維30重量部の配合処方で、実施例2と同様にしてペレットを得た。その結果を表1に示す。
【0041】
比較例3
ポリアミドに常法により製造された融点265℃、相対粘度2.70のナイロン66樹脂を使用し、前記の測定方法によって諸特性を調べた。その結果を表1に示す。
【0042】
比較例4
ポリアミドに常法により製造された融点265℃、相対粘度2.70のナイロン66樹脂を使用した以外は比較例2と同様にしてペレットを得た。その結果を表1に示す。
【0043】
比較例5
硫酸相対粘度2.0で66共重合比率が60重量%の66/6I共重合ポリアミドを100重量部、ポリリン酸メラミンを33重量部を実施例1と同様にしてペレットを得た。その結果を表1に示す。
【0044】
比較例6
硫酸相対粘度2.0で66共重合比率が60重量%の66/6I共重合ポリアミドを100重量部、ポリリン酸メラミンを27重量部にガラス繊維55重量部の配合処方で、実施例2と同様にしてペレットを得た。その結果を表1に示す。
【0045】
実施例1および比較例1〜2より、ポリアミド樹脂にポリリン酸メラミンを配合して得られたポリアミド樹脂組成物は、ハイサイクル性を備えた良外観性成形材料を得られることが確認された。さらに、ハイサイクル性を備え、良外観性を有する前記ポリアミド樹脂組成物に無機充填剤を配合したところ、なおかつ、引張強さも向上することが確認された。
【0046】
【表1】

Figure 2004107467
【0047】
【発明の効果】
本発明の材料は、良外観性とハイサイクル性を両立したポリアミド樹脂組成物である。自動車部品、電気電子部品、建材、玩具、一般機器などの外装部品に好適に使用できる。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a reinforced polyamide resin composition capable of molding a good appearance molded article in a high cycle.
[0002]
[Prior art]
Conventionally, polyamide resins have excellent mechanical properties such as tensile strength and bending strength, elastic modulus, etc. and good heat resistance, chemical resistance, and flame retardancy. Widely used for parts, machine parts, etc.
[0003]
However, when an inorganic reinforcing agent is blended with the polyamide resin, the inorganic reinforcing agent is exposed on the surface, and there is a weak point that the appearance is significantly impaired. For applications requiring good appearance such as exterior parts, materials having both mechanical properties and good appearance have been studied.
[0004]
For example, Patent Document 1 proposes using a copolymerized polyamide resin to achieve high mechanical properties and good appearance. However, since the copolymerized polyamide is slow in solidification, the molding cycle becomes longer and the molding cycle becomes longer. There were very difficulties with productivity. Patent Document 2 proposes blending a small amount of melamine polyphosphate within a range that does not impair the purpose of providing a polyamide film without whitening, but there is no idea to shorten the molding cycle. In addition, the molding cycle cannot be improved with a compounding amount that does not cause whitening.
[0005]
[Patent Document 1]
JP-A-2000-219808 (paragraphs [0002] to [0003])
[Patent Document 2]
JP-A-2000-109689 (paragraphs [0003] to [0013])
[0006]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to provide a polyamide resin composition which has good appearance, realizes high cycle moldability, and has excellent moldability.
[0007]
[Means for Solving the Problems]
The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, found that the above-mentioned object can be achieved as a result of blending melamine polyphosphate with a copolymerized polyamide resin, and reached the present invention.
[0008]
That is, the present invention
(A) A polyamide resin comprising a copolymer and / or a mixture of (a1) 70 to 90% by weight of hexamethylene adipamide units and (a2) 10 to 30% by weight of hexamethylene isophthalamide units. A polyamide resin composition comprising, as a main component, 10 to 100 parts by weight of (B) melamine polyphosphate with respect to 100 parts by weight of (A) the polyamide resin.
[0009]
The polyamide resin composition according to claim 1, wherein (C) 5 to 250 parts by weight of an inorganic reinforcing agent is further added to 100 parts by weight of (A) the polyamide resin.
[0010]
(3) The polyamide resin composition according to (1) or (2), wherein the relative viscosity of the polyamide resin (A) is 1.5 to 7.0.
[0011]
(4) The polyamide resin composition according to any one of (1) to (3), wherein the (C) inorganic filler is at least one selected from glass fiber, wollastenite, and talc.
[0012]
(5) A molded article obtained by molding the polyamide resin composition according to any one of (1) to (4) by at least one method selected from injection molding, extrusion molding, and blow molding.
[0013]
(6) A molded article characterized in that the molded article according to (5) is an exterior part.
[0014]
(7) The exterior component according to (6), wherein the exterior component is any one selected from an automobile component, an electric / electronic component, a building material, and a toy.
It consists of.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described. In the present invention, “weight” means “mass”.
[0016]
The (A) polyamide resin used in the present invention includes (a1) 70 to 90% by weight of hexamethylene adipamide (hereinafter referred to as "N66") units and (a2) hexamethylene isophthalamide (hereinafter referred to as "N6I"). It is a polyamide copolymer and / or mixture containing 10 to 30% by weight of the unit as a main component.
[0017]
N6I units should be 10-30% by weight. If it is less than 10% by weight, good appearance is impaired, and if it exceeds 30% by weight, high cycle properties are impaired. Particularly preferably, it is 10 to 25% by weight.
[0018]
The degree of polymerization of these polyamide resins is not particularly limited, but the relative viscosity measured at 25 ° C. in a 98% concentrated sulfuric acid solution having a sample concentration of 0.01 g / ml is in the range of 1.5 to 7.0. Is preferable, and a polyamide resin having a range of 1.8 to 6.0 is particularly preferable.
[0019]
The polymerization degree of the phosphoric acid moiety of the melamine polyphosphate (B) of the present invention is usually from 2 to 30, but is not particularly limited. (B) The melamine polyphosphate preferably has a phosphorus content in the range of 1 to 25% by weight. If the amount is less than 1% by weight, high cycle properties may be impaired, and if it exceeds 25% by weight, good appearance may be impaired. In particular, those having 5 to 20% by weight are preferable.
[0020]
The inorganic filler (C) used in the present invention is not particularly limited, but a fibrous, plate-like, powder-like, or granular filler can be used. Specifically, glass fiber, PAN-based or pitch-based carbon fiber, stainless fiber, metal fiber such as aluminum fiber or brass fiber, organic fiber such as aromatic polyamide fiber, gypsum fiber, ceramic fiber, asbestos fiber, zirconia fiber Fibrous, such as alumina fiber, silica fiber, titanium oxide fiber, silicon carbide fiber, rock wool, potassium titanate whisker, silicon nitride whisker, whisker-like filler, walasteinite, sericite, kaolin, mica, clay, bentonite, Silicates such as asbestos, talc and alumina silicate, swellable layered silicates such as montmorillonite and synthetic mica, metal compounds such as alumina, silicon oxide, magnesium oxide, zirconium oxide, titanium oxide and iron oxide, calcium carbonate and calcium carbonate , Carbonated magne Um, carbonates such as dolomite, calcium sulfate, sulfates such as barium sulfate, glass beads, ceramic beads, boron nitride, silicon carbide, and a non-fibrous fillers such as calcium phosphate and silica. Among the above fillers, glass fibers, mica, talc, calcined kaolin, wollastonite, and when conductivity is required, PAN-based carbon fibers are preferably used. The type of the glass fiber is not particularly limited as long as it is generally used for reinforcing a resin. For example, a long fiber type or a short fiber type chopped strand, a milled fiber or the like can be used. Further, two or more of the above fillers can be used in combination. The surface of the above-mentioned filler used in the present invention is a known coupling agent (for example, a silane coupling agent, a titanate coupling agent, etc.), other surface treatment agents and swellable layered silicate. Pretreatment with an organic onium ion is preferable in terms of obtaining higher mechanical strength.
[0021]
Further, the glass fiber may be coated or bundled with a thermoplastic resin such as an ethylene / vinyl acetate copolymer or a thermosetting resin such as an epoxy resin.
[0022]
In the polyamide resin composition of the present invention, the melamine polyphosphate (B) needs to be in the range of 10 to 100 parts by weight based on 100 parts by weight of the polyamide resin (A). If it is less than 10 parts by weight, the high cycle property is impaired, and if it exceeds 100 parts by weight, the mechanical properties of the molded article are impaired.
[0023]
Further, in the polyamide resin composition of the present invention, it is preferable that the inorganic filler (C) is 5 to 250 parts by weight based on 100 parts by weight of the polyamide resin (A). If the amount is less than 5 parts by weight, the mechanical properties of the molded article are impaired, and if it exceeds 250 parts by weight, not only the fluidity during molding is impaired, but also no improvement in the mechanical properties may be observed. From a balance between fluidity and mechanical properties during molding, a preferable range is 10 to 200 parts by weight.
[0024]
The method for producing the polyamide resin composition of the present invention is not particularly limited, and a polyamide resin, melamine polyphosphate, and an inorganic filler are heated to a temperature of 220 to 330 ° C. using a kneader such as a single-screw or twin-screw extruder or a kneader. And the like.
[0025]
Further, the polyamide resin of the present invention further includes a copper-based heat stabilizer, a hindered phenol-based, a phosphorus-based, an antioxidant such as a sulfur-based, a heat stabilizer, an ultraviolet absorber, as long as the object of the present invention is not impaired. One or more ordinary additives such as a lubricant, a release agent, an antistatic agent, and a coloring agent including a dye or a pigment can be added.
[0026]
The composition of the present invention can be molded into exterior parts such as automobile parts, electric / electronic parts, building materials, toys, and general equipment by any of injection molding, extrusion molding, and blow molding.
[0027]
【Example】
Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto. The measurement methods used in the examples and comparative examples are shown below.
[0028]
(1) Using a high cycle injection molding machine (Toshiba Machine Co., Ltd .: IS80), a 1 mmφ pin gate molded product was molded by changing the injection time, and the gate sealing time was confirmed from the injection time at which the weight change of the molded product disappeared. .
[0029]
(2) Good Appearance An 80 mm × 80 mm × 3 mm square plate was molded using an injection molding machine (manufactured by Toshiba Machine Co., Ltd .: IS80), and the appearance of the filler was observed with the naked eye to evaluate its appearance. The evaluation criteria are as follows.
A: Almost no floating of the filler was observed.
:: The floating of the filler is slightly observed.
X: The floating of the filler is remarkably observed.
[0030]
(3) Relative viscosity of sulfuric acid The relative viscosity with 98% sulfuric acid was measured according to JIS-K6810.
[0031]
(4) Tensile strength Measured according to the standard method of ASTM D638.
[0032]
Examples 1-6, Comparative Examples 1-2, 5-6
A 66 / 6I copolymer polyamide having a 66 copolymerization ratio of 80% by weight was produced by the following polymerization method. Equimolar salts of hexamethylenediamine and adipic acid Equimolar salts of hexamethylenediamine and isophthalic acid were charged at the ratios shown in Table 1, respectively, and pure water was added in the same amount as the charged raw materials. After the replacement with 2 , the mixture was started with stirring, and the final temperature was adjusted to 270 ° C. while adjusting the pressure in the can to a maximum of 20 kg / cm 2 . The polymer discharged into the water bath was pelletized with a strand cutter.
[0033]
Example 1
100 parts by weight of 66 / 6I copolymer polyamide having a sulfuric acid relative viscosity of 2.0 and a 66 copolymerization ratio of 80% by weight, and 33 parts by weight of melamine polyphosphate [manufactured by Nissan Chemical Co., Ltd., trade name: PMP-100] were added. Using a screw extruder (manufactured by Toshiba Machine Co., Ltd .: TEM58), the polyamide resin and melamine polyphosphate are top-fed (base feed) and kneaded at a cylinder set temperature of 270 ° C. and a screw rotation speed of 200 rpm to form a strand. Was formed, cooled in a cold bath, and then granulated with a cutter to obtain pellets. Various characteristics of the obtained pellets were examined by the above-mentioned measuring methods. Table 1 shows the results.
[0034]
Example 2
100 parts by weight of 66 / 6I copolymer polyamide having a sulfuric acid relative viscosity of 2.0 and a 66 copolymerization ratio of 80% by weight and 27 parts by weight of melamine polyphosphate were mixed with glass fiber [manufactured by Nippon Sheet Glass Co., Ltd .: trade name TP-67. A pellet was obtained in the same manner as in Example 1 except that the glass fiber was side-fed in a blending recipe of 55 parts by weight. Table 1 shows the results.
[0035]
Example 3
Pellets were obtained in the same manner as in Example 1 except that 100 parts by weight of 66 / 6I copolymer polyamide having a sulfuric acid relative viscosity of 2.0 and a 66 copolymerization ratio of 80% by weight and 50 parts by weight of melamine polyphosphate were used. Table 1 shows the results.
[0036]
Example 4
Same as in Example 2 except that 100 parts by weight of 66 / 6I copolymer polyamide having a sulfuric acid relative viscosity of 2.0 and a 66 copolymerization ratio of 80% by weight, 100 parts by weight of melamine polyphosphate and 75 parts by weight of glass fiber were used. To obtain a pellet. Table 1 shows the results.
[0037]
Example 5
Pellets were obtained in the same manner as in Example 1 except that 100 parts by weight of 66 / 6I copolymer polyamide having a sulfuric acid relative viscosity of 2.0 and a 66 copolymerization ratio of 75% by weight and 33 parts by weight of melamine polyphosphate were used. Table 1 shows the results.
[0038]
Example 6
Same as Example 2 with 100 parts by weight of 66 / 6I copolymer polyamide having a sulfuric acid relative viscosity of 2.0 and a 66 copolymerization ratio of 75% by weight, 100 parts by weight of melamine polyphosphate and 27 parts by weight of glass fiber and 55 parts by weight of glass fiber. To obtain a pellet. Table 1 shows the results.
[0039]
Comparative Example 1
Using a 66 / 6I copolymer polyamide having a sulfuric acid relative viscosity of 2.0 and a 66 copolymerization ratio of 80% by weight, various characteristics were examined by the above-described measurement methods. Table 1 shows the results.
[0040]
Comparative Example 2
Pellets were obtained in the same manner as in Example 2, except that 70/6 parts by weight of 66 / 6I copolymer polyamide having a sulfuric acid relative viscosity of 2.0 and a 66 copolymerization ratio of 80% by weight and a glass fiber of 30 parts by weight were used. Table 1 shows the results.
[0041]
Comparative Example 3
Using nylon 66 resin having a melting point of 265 ° C. and a relative viscosity of 2.70 produced by a conventional method as a polyamide, various characteristics were examined by the above-mentioned measuring methods. Table 1 shows the results.
[0042]
Comparative Example 4
Pellets were obtained in the same manner as in Comparative Example 2 except that nylon 66 resin having a melting point of 265 ° C. and a relative viscosity of 2.70 produced by a conventional method was used as the polyamide. Table 1 shows the results.
[0043]
Comparative Example 5
Pellets were obtained in the same manner as in Example 1 except that 100 parts by weight of 66 / 6I copolymer polyamide having a sulfuric acid relative viscosity of 2.0 and a 66 copolymerization ratio of 60% by weight and 33 parts by weight of melamine polyphosphate were used. Table 1 shows the results.
[0044]
Comparative Example 6
Same as in Example 2, except that 100 parts by weight of 66 / 6I copolymer polyamide having a sulfuric acid relative viscosity of 2.0 and a 66 copolymerization ratio of 60% by weight, 100 parts by weight of melamine polyphosphate and 55 parts by weight of glass fiber in 27 parts by weight. To obtain a pellet. Table 1 shows the results.
[0045]
From Example 1 and Comparative Examples 1 and 2, it was confirmed that a polyamide resin composition obtained by blending melamine polyphosphate with a polyamide resin can obtain a good appearance molding material having high cycle properties. Furthermore, it was confirmed that when an inorganic filler was added to the polyamide resin composition having high cycle properties and good appearance, the tensile strength was also improved.
[0046]
[Table 1]
Figure 2004107467
[0047]
【The invention's effect】
The material of the present invention is a polyamide resin composition having both good appearance and high cycle properties. It can be suitably used for exterior parts such as automobile parts, electric and electronic parts, building materials, toys, and general equipment.

Claims (7)

(a1)ヘキサメチレンアジパミド単位70〜90重量%と(a2)ヘキサメチレンイソフタラミド単位10〜30重量%との共重合体および/または混合物からなる(A)ポリアミド樹脂であって、前記(A)ポリアミド樹脂100重量部に対して、(B)ポリリン酸メラミン10〜100重量部を主要成分として含有することを特徴とするポリアミド樹脂組成物。(A1) A polyamide resin comprising a copolymer and / or a mixture of (a1) 70 to 90% by weight of hexamethylene adipamide unit and (a2) 10 to 30% by weight of hexamethylene isophthalamide unit, A polyamide resin composition comprising, as a main component, 10 to 100 parts by weight of (B) melamine polyphosphate with respect to 100 parts by weight of (A) a polyamide resin. (A)ポリアミド樹脂100重量部に対して、さらに(C)無機強化剤を5〜250重量部配合してなることを特徴とする請求項1記載のポリアミド樹脂組成物。The polyamide resin composition according to claim 1, further comprising (C) 5 to 250 parts by weight of an inorganic reinforcing agent based on 100 parts by weight of the polyamide resin (A). (A)ポリアミド樹脂の相対粘度が1.5〜7.0であることを特徴とする請求項1または2記載のポリアミド樹脂組成物。The polyamide resin composition according to claim 1, wherein the relative viscosity of the polyamide resin (A) is 1.5 to 7.0. (C)無機充填剤がガラス繊維、ワラステナイト、タルクから選ばれた少なくとも1種であることを特徴とする請求項1〜3いずれか記載のポリアミド樹脂組成物。(C) The polyamide resin composition according to any one of claims 1 to 3, wherein the inorganic filler is at least one selected from glass fiber, wollastenite, and talc. 請求項1〜4いずれか記載のポリアミド樹脂組成物を、射出成形、押出成形、ブロー成形の内から選ばれる少なくとも一種の方法で成形してなることを特徴とする成形品。A molded article obtained by molding the polyamide resin composition according to any one of claims 1 to 4 by at least one method selected from injection molding, extrusion molding, and blow molding. 請求項5記載の成形品が外装部品であることを特徴とする成形品。A molded article according to claim 5, wherein the molded article is an exterior part. 請求項6記載の外装部品が自動車部品、電気電子部品、建材、玩具部品のうち選ばれたいずれか1種であることを特徴とする外装部品。7. The exterior component according to claim 6, wherein the exterior component is any one selected from an automobile component, an electric / electronic component, a building material, and a toy component.
JP2002271075A 2002-09-18 2002-09-18 High-cycle moldable polyamide resin composition with good appearance and molded product thereof Pending JP2004107467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002271075A JP2004107467A (en) 2002-09-18 2002-09-18 High-cycle moldable polyamide resin composition with good appearance and molded product thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002271075A JP2004107467A (en) 2002-09-18 2002-09-18 High-cycle moldable polyamide resin composition with good appearance and molded product thereof

Publications (1)

Publication Number Publication Date
JP2004107467A true JP2004107467A (en) 2004-04-08

Family

ID=32268500

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002271075A Pending JP2004107467A (en) 2002-09-18 2002-09-18 High-cycle moldable polyamide resin composition with good appearance and molded product thereof

Country Status (1)

Country Link
JP (1) JP2004107467A (en)

Similar Documents

Publication Publication Date Title
JP6836316B2 (en) Reinforced polyamide molding composition and injection molded products manufactured from it
US20140045978A1 (en) Reinforced PCT Compositions
JPS6023448A (en) Aromatic polysulfone resin composition
JP2008111064A (en) Polyamide resin composition and molded product
CA2046761A1 (en) Polyarylene sulfide resin molding composition
JPS63137956A (en) Polyamide resin for molding
JP2009185150A (en) Heat conductive resin composition and its resin molded article
JP2009185151A (en) Heat conductive resin composition
JP3399639B2 (en) Resin composition
JP2009185152A (en) Heat conductive resin composition
JP2878921B2 (en) Polyarylene sulfide resin composition
JP2004107467A (en) High-cycle moldable polyamide resin composition with good appearance and molded product thereof
JP2912153B2 (en) Polyarylene sulfide resin composition and method for producing the same
JP3385104B2 (en) Resin composition
JP3043570B2 (en) Polyarylene sulfide resin composition
JP2009007482A (en) Polyamide resin composition and vehicle interior/exterior trim component formed of the composition
KR100792115B1 (en) Polypropylene Resin Composition With Excellent Strength And Heat Resistance
JP3385103B2 (en) Resin composition
JP2000219808A (en) Polyamide resin composition
JP2004131544A (en) Polyamide resin composition
JPS646667B2 (en)
JPH0264158A (en) Polyarylene sulfide resin composition
JPS59157150A (en) Polyether ketone resin composition
JP3029542B2 (en) Polyarylene sulfide resin composition
JP2001106904A (en) Polyamide composition for molding