JP6722443B2 - 低帯電量の発泡性スチレン系樹脂粒子、予備発泡粒子及び発泡成形体の製造方法 - Google Patents
低帯電量の発泡性スチレン系樹脂粒子、予備発泡粒子及び発泡成形体の製造方法 Download PDFInfo
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- JP6722443B2 JP6722443B2 JP2015250387A JP2015250387A JP6722443B2 JP 6722443 B2 JP6722443 B2 JP 6722443B2 JP 2015250387 A JP2015250387 A JP 2015250387A JP 2015250387 A JP2015250387 A JP 2015250387A JP 6722443 B2 JP6722443 B2 JP 6722443B2
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- OYHQOLUKZRVURQ-IXWMQOLASA-N linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 description 1
- HBOQXIRUPVQLKX-UHFFFAOYSA-N linoleic acid triglyceride Natural products CCCCCC=CCC=CCCCCCCCC(=O)OCC(OC(=O)CCCCCCCC=CCC=CCCCCC)COC(=O)CCCCCCCC=CCC=CCCCCC HBOQXIRUPVQLKX-UHFFFAOYSA-N 0.000 description 1
- 229940057948 magnesium stearate Drugs 0.000 description 1
- NWZZFAQUBMRYNU-UHFFFAOYSA-N n-octadecylnonadec-18-en-1-amine Chemical compound CCCCCCCCCCCCCCCCCCNCCCCCCCCCCCCCCCCCC=C NWZZFAQUBMRYNU-UHFFFAOYSA-N 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
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- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- WGOROJDSDNILMB-UHFFFAOYSA-N octatriacontanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC(N)=O WGOROJDSDNILMB-UHFFFAOYSA-N 0.000 description 1
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- 229920005992 thermoplastic resin Polymers 0.000 description 1
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- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 229940078499 tricalcium phosphate Drugs 0.000 description 1
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- 235000019731 tricalcium phosphate Nutrition 0.000 description 1
- VLPFTAMPNXLGLX-UHFFFAOYSA-N trioctanoin Chemical compound CCCCCCCC(=O)OCC(OC(=O)CCCCCCC)COC(=O)CCCCCCC VLPFTAMPNXLGLX-UHFFFAOYSA-N 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 229940098697 zinc laurate Drugs 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
- 229940057977 zinc stearate Drugs 0.000 description 1
- GPYYEEJOMCKTPR-UHFFFAOYSA-L zinc;dodecanoate Chemical compound [Zn+2].CCCCCCCCCCCC([O-])=O.CCCCCCCCCCCC([O-])=O GPYYEEJOMCKTPR-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Description
セルに新しい脱水溶剤を50ml入れ、セル内の水分を除去する。測定する樹脂を0.5g計量し、ロートを使用しセルの上部共栓部から樹脂をすばやく投入する。樹脂が溶けた事を確認し、カールフィシャー試薬による滴定を実施し、樹脂の水分量を測定する。
機種(メーカー):AQV−2100片 (平沼産業株式会社)
試薬:脱水溶剤:三菱化学 アクアミクロン脱水溶剤CM
カールフィシャー試薬:三菱化学 アクアミクロン滴定剤 SS3mg
標準水メタノール:三菱化学 標準水メタノール 2mg
発泡性スチレン系樹脂粒子をポリエチレン製の袋(OK袋No.15、大倉工業株式会社製)に入れ口を開けた状態で、23℃、湿度50%の恒温室で一晩保管する。保管後、発泡性スチレン系樹脂粒子300gをポリエチレン製の袋に入れ、口を縛った状態で100回振った。その後、ポリエチレン袋の口を開け、発泡性スチレン系樹脂粒子表面の帯電量を静電気測定器(シシド静電気製スタチロンDX)によって3回以上測定し、その平均値を被覆発泡性粒子の帯電量とした(測定距離30mm、電荷量測定は23℃、相対湿度50%の雰囲気下で行った)。
脱水後の発泡性スチレン系樹脂粒子を出口温度30℃の気流乾燥機を通した後、バットの上に広げ、箱型通気乾燥器[田中化学機械製]内にて50℃で加熱した後、粒子同士が水分で接着しなくなるまでの時間により、以下の通り乾燥状態を評価した。
◎:10分以下
○:10分を超えて、20分以下
×:20分を超える。
円筒形の予備発泡機[大開工業製、CH−100]を使用し、吹き込み蒸気圧0.06MPaの条件にて嵩密度25g/Lまで発泡した。その後、目開き10mmの網を用いて発泡粒子を篩い、網上に残ったブロッキング量を以下の通り評価した。
○:0.3重量%未満
×:0.3重量%以上。
発泡成形体を100mm×100mm×10mm(t)の大きさのサンプルに切り出し、表面スキン層のある切断していない面で測定した。35℃の乾燥室で12時間乾燥させた後、恒温恒湿槽から取り出した後直ちにポリエチレン製の袋(OK袋No.15、大倉工業株式会社製)を用いて成形体表面全体を素早く5往復擦り、直後1秒以内の成形体表面の表面電荷量を測定した。測定はシシド静電気製スタチロンDXを使用し、測定距離30mmで実施した(電荷量測定は23℃、相対湿度50%の雰囲気下で行った)。
発泡成形体を100mm×100mm×10mm(t)の大きさのサンプルに切り出し、表面スキン層のある切断していない面で表面固有抵抗値を測定した。35℃の乾燥室で12時間乾燥させた後、LH40−15P型 恒温恒湿槽(株式会社ナガノサイエンス製)内で24時間置くことでサンプルの温度を35℃、相対湿度を12%に調整した。
以下に樹脂粒子の帯電防止を目的とした本発明の実施例を記載する。
撹拌機付属の6Lのオートクレーブに、純水100重量部、リン酸三カルシウム0.16重量部、ドデシルベンゼンスルホン酸ナトリウム0.01重量部および、開始剤としてベンゾイルパーオキサイド0.25重量部および1,1−ビス(t−ブチルパーオキシ)シクロヘキサン0.15重量部を仕込んだ。続いて、250回転/分で撹拌しながら、スチレン単量体95重量部、アクリル酸ブチル単量体5重量部を仕込んだ後、98℃まで昇温させた。引き続き、98℃にて4時間保持して、スチレン系樹脂粒子を得た。
塗布した帯電防止剤の量を0.005重量部とした以外は参考例1と同様の方法にて樹脂を作成し、評価した。結果を表1に示す。
塗布する帯電防止剤の水溶液の濃度を1.0重量%とした以外は参考例1と同様の方法にて樹脂を作成し、評価した。結果を表1に示す。
脱水後の樹脂の水分量が10重量%とした以外は参考例1と同様の方法にて樹脂を作成し、評価した。結果を表1に示す。
帯電防止剤を脱水後に塗布するのではなく、室温に冷却後のオートクレーブ内に0.005重量部加え、15分間撹拌した以外は参考例1と同様の方法にて樹脂を作成し、評価した。結果を表1に示す。
塗布した帯電防止剤の量を6.0重量部とした以外は参考例1と同様の方法にて樹脂を作成し、評価した。結果を表1に示す。
帯電防止剤を塗布しなかったこと以外は参考例1と同様の方法にて樹脂を作成し、評価した。結果を表1に示す。
発泡性スチレン系樹脂粒子[(株)カネカ製:カネパールTGBB]を100重量部、マグネシウムステアレート[日油(株)製]を0.3重量部、ひまし硬化油[日油(株)製]を0.15部、及び帯電防止剤としてN−ヒドロキシエチル−N−2−ヒドロキシアルキルアミン[アルキル基の炭素数C=14:(株)タナカ化学研究所製、アンチスタ80FS]を2.0重量部を、スーパーミキサー[(株)川田製、SMV−20]に投入し、1000rpmで120秒間ブレンドした。その後払い出し、帯電防止剤で被覆された発泡性スチレン系樹脂粒子を作製した。
塗布した帯電防止剤の量を6.0重量部とした以外は実施例4と同様の方法にて樹脂を作成し、評価した。結果を表2に示す。
帯電防止剤を塗布しなかったこと以外は実施例4と同様の方法にて樹脂を作成し、評価した。結果を表2に示す。
Claims (3)
- 発泡性スチレン系樹脂粒子に、脂肪酸金属塩を含む外添剤および帯電防止剤を塗布する方法であり、
前記発泡性スチレン系樹脂粒子に塗布する帯電防止剤が、分子中に一つのアミノ基及び二つのヒドロキシル基を有するN−ヒドロキシエチル−N−2−ヒドロキシアルキルアミン(アルキル基の炭素数C=14)を90%以上含み、前記帯電防止剤が、前記発泡性スチレン系樹脂粒子100重量部に対して、2.0重量部以上3.0重量部以下を前記発泡性スチレン系樹脂粒子の水分量が0.01重量%以上5.0重量%以下のときに、塗布する方法であり、
発泡性スチレン系樹脂粒子に前記帯電防止剤を塗布するにあたって、発泡性スチレン系樹脂粒子を脱水及び乾燥後に前記帯電防止剤を混合することを特徴とする発泡性スチレン系樹脂粒子の製造方法。 - 請求項1記載の発泡性スチレン系樹脂粒子を発泡して得られる予備発泡粒子の製造方法。
- 請求項2記載の予備発泡粒子を型内成形して得られる発泡成形体の製造方法。
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