JP5407988B2 - 液晶性樹脂組成物及びその成形体 - Google Patents
液晶性樹脂組成物及びその成形体 Download PDFInfo
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- JP5407988B2 JP5407988B2 JP2010077182A JP2010077182A JP5407988B2 JP 5407988 B2 JP5407988 B2 JP 5407988B2 JP 2010077182 A JP2010077182 A JP 2010077182A JP 2010077182 A JP2010077182 A JP 2010077182A JP 5407988 B2 JP5407988 B2 JP 5407988B2
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- MKTRXTLKNXLULX-UHFFFAOYSA-P pentacalcium;dioxido(oxo)silane;hydron;tetrahydrate Chemical compound [H+].[H+].O.O.O.O.[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O MKTRXTLKNXLULX-UHFFFAOYSA-P 0.000 claims description 6
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- 125000003118 aryl group Chemical group 0.000 description 64
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Description
(a):構造単位(I)及び/又は構造単位(II)からなる液晶ポリエステル、液晶ポリエステルアミド又は液晶ポリアミド。
(b):構造単位(I)及び構造単位(II)から選ばれる構造単位と、構造単位(III)と、構造単位(IV)とからなる液晶ポリエステル又は液晶ポリエステルアミド。
(c)構造単位(I)及び構造単位(II)から選ばれる構造単位と、構造単位(III)と、構造単位(IV)、構造単位(V)及び構造単位(VI)から選ばれる構造単位とからなる液晶ポリエステル又は液晶ポリエステルアミド。
本発明の液晶性樹脂組成物は、電気・電子部品や光学部品を製造するための成形材料として好適である。かかる電気・電子部品や光学部品としては、例えば、コネクター、ソケット、リレー部品、コイルボビン、光ピックアップ、発振子、プリント配線板、回路基板、半導体デバイスのパッケージ、コンピュータ関連部品、カメラの鏡筒、光学センサーの筐体、コンパクトカメラのモジュール筐体(例えばパッケージや鏡筒等)、プロジェクター光学エンジンの構成部材、半導体製造プロセスの関連部品(例えばICトレーやウエハーキャリヤー等)、家庭電気製品の部品(例えばVTR、テレビ、アイロン、エアーコンディショナー、ステレオ、掃除機、冷蔵庫、炊飯器、照明器具等の部品)、照明器具の部品(例えばランプリフレクター、ランプホルダー等)、音響製品の部品(例えばコンパクトディスク、レーザーディスク(登録商標)、スピーカー部品等)、通信機器の部品(例えば光ケーブル用フェルール、電話機の部品、ファクシミリの部品、モデムの部品等)等を挙げることができる。
[液晶性樹脂の製造]
攪拌装置、トルクメータ、窒素ガス導入管、温度計及び還流冷却器を備えた反応器に、p−ヒドロキシ安息香酸994.5g(7.2モル)、4,4’−ジヒドロキシビフェニル446.9g(2.4モル)、テレフタル酸299.0g(1.8モル)、イソフタル酸99.7g(0.6モル)、無水酢酸1347.6g(13.2モル)及び1−メチルイミダゾール0.194gを仕込んだ。そして、室温で15分間攪拌して反応器内を十分に窒素ガスで置換し、さらに、攪拌しながら昇温した。そして、反応器内の温度が145℃となったところで、この温度を保持したまま1時間攪拌した。その後、留出する副生酢酸及び未反応の無水酢酸を留去しながら、2時間50分かけて320℃まで昇温し、トルクの上昇が認められる時点まで反応させた。これにより、プレポリマーが得られた。かかるプレポリマーの流動開始温度は、261℃であった。
凝集粒子(1)として、(株)日本インシュレーション製の「トバモライトパウダーTJ」(充填密度(JIS K 1464)0.129g/cc、平均粒径(レーザー回折法)17μm、比表面積(BET法)55m2/g、吸油量(JIS K 5101)441ml/100g)を用いた。また、凝集粒子(2)として、(株)日本インシュレーション製の「トバモライトパウダーTK」(充填密度(JIS K 1464)0.136g/cc、平均粒径(レーザー回折法)24μm、比表面積(BET法)56m2/g、吸油量(JIS K 5101)624ml/100g)を用いた。
液晶性樹脂100重量部に対して、表1に示す種類及び量の凝集粒子、表1に示す量のガラス繊維(セントラル硝子(株)製の「EFH75−01」(平均繊維長75μm))及びカーボンブラック(三菱化学(株)製の「カーボンブラックCB#45」)1.4重量部を配合し、二軸押出機(池貝鉄工(株)製の「PCM−30」)を用いて、シリンダー温度350℃で造粒し、液晶性樹脂組成物のペレットを得た。
液晶性樹脂組成物のペレットを、乾燥させた後、射出成形機(日精樹脂工業(株)製の「PS40E−5ASE」)を用いて、外形寸法が64×64×1mmの板状成形品に成形した。この成形品の表面全長にわたってテープ(ニチバン(株)製の「セロテープ(登録商標)CT−18」)を貼った後でそれを素早く引き剥がすという作業を、30回繰り返した。その際、テープを貼る方向は、MD(成形時の流動方向)及びTD(MD方向に垂直な方向)の両方向とした。この作業の後で、成形品に表面剥離(すなわちフィブリル)が発生しているかどうかを目視で観察し、結果を表1に示した。
液晶性樹脂組成物のペレットを、乾燥させた後、射出成形機(日精樹脂工業(株)製の「PS40E−5ASE」)を用いて、0.8mmtの6号ダンベル状試験片に成形した。この試験片を5mm幅程度に裁断し、窒素置換を行いバイアル瓶に封入後、120℃12時間かけてエージングを行った。このバイアル瓶中のガスについて、ガスクロマトグラフ((株)島津製作所製の「GC−15A」)を用いて、酢酸濃度をガスクロマトグラフィー(ヘッドスペース法)により測定し、結果を表1に示した。
Claims (6)
- 液晶性樹脂と、けい酸カルシウムの板状結晶が凝集してなる凝集粒子とを含む液晶性樹脂組成物。
- 前記板状結晶が、トバモライトの結晶である請求項1に記載の液晶性樹脂組成物。
- 前記凝集粒子の含有量が、前記液晶性樹脂100重量部に対して、1〜25重量部である請求項1又は2に記載の液晶性樹脂組成物。
- さらに繊維状フィラーを含む請求項1〜3のいずれかに記載の液晶性樹脂組成物。
- 前記繊維状フィラーの含有量が、前記液晶性樹脂100重量部に対して、15〜50重量部である請求項1又は2に記載の液晶性樹脂組成物。
- 請求項1〜5のいずれかに記載の液晶性樹脂組成物を溶融成形してなる成形体。
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