JP6579417B1 - 炭素繊維強化プラスチック成形用樹脂組成物、成形材料、成形品及び成形品の製造方法 - Google Patents
炭素繊維強化プラスチック成形用樹脂組成物、成形材料、成形品及び成形品の製造方法 Download PDFInfo
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- JP6579417B1 JP6579417B1 JP2019537419A JP2019537419A JP6579417B1 JP 6579417 B1 JP6579417 B1 JP 6579417B1 JP 2019537419 A JP2019537419 A JP 2019537419A JP 2019537419 A JP2019537419 A JP 2019537419A JP 6579417 B1 JP6579417 B1 JP 6579417B1
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- carbon fiber
- reinforced plastic
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- fiber reinforced
- plastic molding
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- Polyurethanes Or Polyureas (AREA)
Abstract
Description
温度計、窒素導入管、撹拌機を設けた2Lフラスコに、エポキシ樹脂(DIC株式会社製「エピクロン850」、ビスフェノールA型エポキシ樹脂、エポキシ当量188)754質量部、ビスフェノールA 189質量部を仕込み、撹拌しながら110℃に昇温した。ここに、2−メチルイミダゾール0.40質量部を入れ、反応物のエポキシ当量が360になるまで110℃で反応を行った。次いで、メタクリル酸210質量部、及びハイドロキノン0.40質量部を仕込み、窒素と空気とを1対1で混合したガス流通下で、90℃まで昇温した。ここに2−メチルイミダゾール1.00質量部を入れ、105℃に昇温して反応を継続させ、酸価が16以下、エポキシ当量が500以上になったので、反応を終了した。60℃付近まで冷却した後、反応容器より取り出し、エポキシメタクリレート(1)を得た。
温度計、窒素導入管、撹拌機を設けた2Lフラスコに、窒素雰囲気化でネオペンチルグリコール460質量部、プロピレングリコール166質量部を仕込み、撹拌を開始、そこにイソフタル酸273質量部を仕込み、215℃に向け昇温を行った。215℃到達後、反応温度を維持しながら、酸価3以下まで反応を行った。その後、140℃まで冷却し、無水マレイン酸471質量部を仕込み、210℃まで再度、昇温を行った。その後、スチレンモノマー36質量%での希釈粘度(ガードナー気泡粘度)および希釈酸価を確認しながら210℃での反応を続け、希釈粘度がR-S、希釈酸価8〜12で反応を終了し不飽和ポリエステル(1)を得た。
合成例1で得たエポキシメタクリレート(A−1)55質量部をスチレンモノマー 45質量部に溶解させた樹脂溶液100質量部に、p−t−ブチルカテコール0.035質量部、イソホロンジイソシアネート1.0質量部を添加し、炭素繊維強化プラスチック成形用樹脂組成物(1)を得た。この炭素繊維強化プラスチック成形用樹脂組成物(1)の粘度は、25℃において220mPa・sであった。
上記で得られた炭素繊維強化プラスチック成形用樹脂組成物(1)について、60℃で2時間放置した後の25℃における粘度を測定し、下記の基準に従い、保存安定性を評価した。
○:2時間後の粘度(mPa・s)が、初期粘度(mPa・s)の150%未満
×:2時間後の粘度(mPa・s)が、初期粘度(mPa・s)の150%以上
平板型面(400mm×400mm)に、炭素繊維強化材(東レ株式会社製「C06343」、フィラメント径:7μmの3K炭素繊維トウの平織クロス、200g/m2)250mm×250mm:8プライ、樹脂供給ライン、減圧ラインとしてφ6mmスパイラルチューブを配置し、その上にピールプライ(AIRTECH社製「BleederLeaseB」)、フローメディア(AIRTECH社製「Greenflow75」)、バギングフィルム(AIRTECH社製「KM1300」)で順に覆い、バギングフィルム周縁と型面および、樹脂供給、減圧ホースの間をシールテープ(AIRTECH社製「AT−200Y」)で密閉した。樹脂供給ホースは、樹脂槽底面に届く長さとした。また、減圧ホースは、減圧ゲージを介して、真空ポンプに接続した。
樹脂槽手前の樹脂供給ホースをバイスプライヤーで遮断し、真空ポンプを運転させ、型とバギングフィルムの間の気密を確認、減圧ゲージで10kPa以下を保持した。
上記、減圧度を保持したまま、樹脂槽には、炭素繊維強化プラスチック成形用樹脂組成物(1)300質量部に、6%2−エチルヘキサン酸コバルト0.6質量部、トリゴノックス40(化薬アクゾ株式会社製アセチルアセトンパーオキサイド)3.0質量部を混合し移し入れた。
樹脂供給ホースのバイスプライヤーを解放し、型とフィルム間の炭素繊維強化材への樹脂の注入を開始した。炭素繊維強化材全面への注入を終え、樹脂供給ホース、減圧ホースをバイスプライヤーで遮断した。そのまま、常温でゲル化させた後、60℃、80℃、120℃でそれぞれ1時間の後硬化を行い成形品(1)を得た。得られた成形品(1)の板厚は、2mmで、炭素繊維含有率は、50.5体積%であった。
上記で得られた成形品(1)について、JIS K7074−1988に準拠し、3点曲げ試験を行い、曲げ強さ、曲げ弾性率を測定した。
上記で得られた成形品(1)について、JIS K7078−1988に準拠し、層間せん断強さを測定した。
合成例2で得た不飽和ポリエステル(1)59質量部をスチレンモノマー41質量部に溶解させた樹脂溶液100質量部に、メチルハイドロキノン0.025質量部、イソホロンジイソシアネート2.7質量部を添加し、炭素繊維強化プラスチック成形用樹脂組成物(2)を得た。この炭素繊維強化プラスチック成形用樹脂組成物(2)の粘度は、25℃において200mPa・sであった。実施例1と同様にして、保存安定性の評価を行った。
実施例1で添加したイソホロンジイソシアネートを添加しなかった以外は、実施例1と同様に操作し、炭素繊維強化プラスチック成形用樹脂組成物(R1)を得た。この炭素繊維強化プラスチック成形用樹脂組成物(R1)の粘度は、25℃において230mPa・sであった。実施例1と同様にして、保存安定性の評価を行った。
実施例2で添加したイソホロンジイソシアネートを添加しなかった以外は、実施例2と同様に操作し、炭素繊維強化プラスチック成形用樹脂組成物(R2)を得た。この炭素繊維強化プラスチック成形用樹脂組成物(R2)の粘度は、25℃において220mPa・sであった。実施例1と同様にして、保存安定性の評価を行った。
実施例1で添加したイソホロンジイソシアネート1.0質量部をポリメリックMDI(東ソー株式会社製「ミリオネートMR−200」)1.2質量部に変更した以外は、実施例1と同様に操作し、炭素繊維強化プラスチック成形用樹脂組成物(R3)を得た。この炭素繊維強化プラスチック成形用樹脂組成物(R3)の粘度は、25℃において220mPa・sであった。実施例1と同様にして、保存安定性の評価を行った。
実施例1で添加したイソホロンジイソシアネート1.0質量部を変性MDI(ダウ・ケミカル日本株式会社製「アイソネート143L」)1.28質量部に変更した以外は、実施例1と同様に操作し、炭素繊維強化プラスチック成形用樹脂組成物(R4)を得た。この炭素繊維強化プラスチック成形用樹脂組成物(R4)の粘度は、25℃において220mPa・sであった。実施例1と同様にして、保存安定性の評価を行った。
Claims (5)
- 水酸基を有するラジカル硬化性樹脂(A)、不飽和単量体(B)、及びイソホロンジイソシアネートを含有する炭素繊維強化プラスチック成形用樹脂組成物であって、前記イソホロンジイソシアネートの含有量が、前記ラジカル硬化性樹脂(A)と前記不飽和単量体(B)との総量に対して、0.1〜5質量%であることを特徴とする炭素繊維強化プラスチック成形用樹脂組成物。
- 前記水酸基を有するラジカル硬化性樹脂(A)が、エポキシ(メタ)アクリレート及び/又は不飽和ポリエステルである請求項1記載の炭素繊維強化プラスチック成形用樹脂組成物。
- 前記ラジカル硬化性樹脂(A)と前記不飽和単量体(B)との質量比(A)/(B)が30/70〜70/30の範囲である請求項1又は2記載の炭素繊維強化プラスチック成形用樹脂組成物。
- 請求項1〜3のいずれか1項記載の炭素繊維強化プラスチック成形用樹脂組成物、重合開始剤、及び炭素繊維強化材を含有することを特徴とする成形材料。
- 請求項4記載の成形材料の硬化物であることを特徴とする成形品。
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WO2011092962A1 (ja) * | 2010-01-28 | 2011-08-04 | ディーエイチ・マテリアル株式会社 | 炭素繊維用サイジング剤、炭素繊維、及びその製造方法、ならびに、炭素繊維を含む成形材料及び成形品 |
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JPS61252234A (ja) * | 1985-05-02 | 1986-11-10 | Mitsubishi Rayon Co Ltd | 繊維強化プラスチツク中間素材 |
JP2015021091A (ja) * | 2013-07-22 | 2015-02-02 | Dic株式会社 | 硬化性組成物及びその硬化物 |
JP2017214482A (ja) * | 2016-05-31 | 2017-12-07 | 日華化学株式会社 | 硬化性樹脂、硬化性樹脂組成物、繊維用サイジング剤、強化用繊維、繊維強化複合材形成用樹脂組成物及び繊維強化複合材 |
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JP7243164B2 (ja) | 2018-12-11 | 2023-03-22 | Dic株式会社 | VaRTM成形用樹脂組成物、成形材料、成形品及び成形品の製造方法 |
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