JP6794718B2 - 水分散型絶縁皮膜形成用電着液 - Google Patents
水分散型絶縁皮膜形成用電着液 Download PDFInfo
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Description
この電着液に含まれるポリマー粒子は高分子(ポリマー)であるポリアミドイミドから構成される。ポリマー粒子に、ポリアミドイミドからなる粒子を使用する理由は、他のポリマー粒子に比べて耐熱性、可とう性の面で優れるからである。
有機溶媒には、1,3−ジメチル−2−イミダゾリジノン(DMI)、N−メチル−2−ピロリドン、N,N−ジメチルホルムアミド、N,N−ジメチルアセトアミド、ジメチルスルホキシド、テトラメチル尿素、ヘキサエチルリン酸トリアミドや、γ−ブチロラクタム等の極性溶剤を使用することができる。また、水には、純水、超純水、イオン交換水等が挙げられる。また、水以外に貧溶媒を含有する場合には、貧溶媒には、1−プロパノール、イソプロピルアルコール等の脂肪族アルコール類、2−メトキシエタノール等のエチレングリコール類、1−メトキシ−2−プロパノール等のプロピレングリコール類等を使用することができる。
塩基性化合物は、中和剤又は分散剤として電着液中に添加される成分であり、この塩基性化合物には、水とのHSP距離が35以上の窒素含有化合物を使用する。ここで、HSP(Hansen Solubility Parameter:ハンセン溶解度パラメーター)とは、ある物質がある物質にどれくらい溶けるかを示す溶解性の指標として用いられる値である。このHSP値は分散項(dD)、極性項(dP)、水素結合項(dH)の3つのパラメータで構成され、各物質ごとに固有の値を示す。これら3つのパラメータは、3次元空間(ハンセン空間)内の座標とみなすことができるため、HSP値は上記空間内の0を始点、HSP値によって与えられる座標を終点とするベクトルとして表される。HSP距離(Ra)とは、2つの物質のHSP値によって与えられる上記座標間の距離又はベクトル間距離のことであり、一般に下記式(1)により算出される。
電着液は、例えば、次のような方法で得ることができる。先ず、上述のようにジイソシアネート成分と酸成分と有機溶媒を用いて、ポリアミドイミド樹脂ワニスを合成する。具体的には、モノマーとしての上記ジイソシアネート成分と上記酸成分をそれぞれ準備し、これらとともに、DMI等の有機溶媒をフラスコ内へ所定の割合で投入する。フラスコには、撹拌機や、冷却管、窒素導入管、温度計等を備えた四つ口フラスコを用いるのが好ましい。上記ジイソシアネート成分と酸成分の配合比は、モル比で1:1となる割合とするのが好ましい。また、有機溶媒の割合は、合成後に得られる樹脂の質量の1〜3倍に相当する割合とするのが好ましい。これらをフラスコ内へ投入した後は、好ましくは80〜180℃の温度まで昇温させ、好ましくは2〜8時間反応させる。
続いて、上記水分散型絶縁皮膜形成用電着液を用いて金属表面に絶縁皮膜が形成された絶縁物の製造方法について、電線の表面に絶縁皮膜が形成された絶縁電線の製造方法を例に図面に基づいて説明する。図1に示すように、電着塗装装置10を用いて上記電着液11を電着塗装法により電線12の表面に電着させて絶縁層21aを形成する。具体的には、予め、円筒状に巻き込んである横断面円形の円柱状の電線13を、直流電源14の正極に陽極16を介して電気的に接続しておく。そして、この円柱状の電線13を図1の実線矢印の方向に引上げて次の各工程を経る。
攪拌機、冷却管、窒素導入管及び温度計を備えた2リットルの四つ口フラスコに1,3−ジメチル−2−イミダゾリジノン(DMI)30.97g、ジフェニルメタン−4,4’−ジイソシアネート7.508g(30ミリモル)及び無水トリメリット酸5.764g(30ミリモル)を仕込み、160℃まで昇温させた。約6時間反応させることにより、数平均分子量が40000のポリマー(ポリアミドイミド樹脂)を合成し、ポリアミドイミド樹脂(不揮発分)の濃度が30質量%のポリアミドイミドワニス(ポリアミドイミド樹脂/DMI=30質量%/70質量%)を得た。
以下の表1に示すように、ポリマー粒子の平均粒径、塩基性化合物の種類、及び電着液中の各成分の割合を変更したこと以外は、実施例1と同様にして電着液を得た。なお、ポリマー粒子の平均粒径は、他の液成分の割合を変更したことにより得られた数値である。
実施例1〜7及び比較例1で得られた電着液等について、以下の(i)〜(iii)の評価を行った。これらの結果を以下の表1又は表2に示す。
Claims (1)
- ポリマー粒子、有機溶媒、塩基性化合物及び水を含有する水分散型絶縁皮膜形成用電着液において、
前記ポリマー粒子が主鎖中にアニオン性基を有しないポリアミドイミドであり、
前記塩基性化合物が水とのHSP距離が36.2〜43.0の窒素含有化合物であり、
前記ポリマー粒子の体積基準のメジアン径(D50)が0.112〜0.175μmであり、かつメジアン径(D50)の粒子径の±30%以内に有る粒子が全粒子の54〜67%(体積基準)であり、
前記塩基性化合物はアルキルアミン化合物であることを特徴とする水分散型絶縁皮膜形成用電着液。
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PCT/JP2016/078424 WO2017110188A1 (ja) | 2015-12-22 | 2016-09-27 | 水分散型絶縁皮膜形成用電着液 |
CN201680074952.5A CN108473813A (zh) | 2015-12-22 | 2016-09-27 | 水分散型绝缘覆膜形成用电沉积液 |
KR1020187017392A KR102595402B1 (ko) | 2015-12-22 | 2016-09-27 | 수분산형 절연 피막 형성용 전착액 |
US16/064,383 US10800942B2 (en) | 2015-12-22 | 2016-09-27 | Water-based electrodeposition dispersion for forming insulating film |
EP16878086.4A EP3395917B1 (en) | 2015-12-22 | 2016-09-27 | Aqueous dispersion type electrodeposition liquid for insulating-film formation |
TW105131711A TWI718183B (zh) | 2015-12-22 | 2016-09-30 | 水分散型絕緣膜形成用電沉積液 |
JP2020119074A JP6973576B2 (ja) | 2015-12-22 | 2020-07-10 | 水分散型絶縁皮膜形成用電着液 |
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JP (2) | JP6794718B2 (ja) |
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JP6787147B2 (ja) * | 2016-02-18 | 2020-11-18 | 三菱マテリアル株式会社 | 電着液及び電着塗装体 |
US11230788B2 (en) | 2016-02-18 | 2022-01-25 | Mitsubishi Materials Corporation | Electrodeposition liquid and electrodeposition-coated article |
JP6769076B2 (ja) * | 2016-04-04 | 2020-10-14 | 三菱マテリアル株式会社 | 電着塗料組成物及びそれを用いた絶縁電線の製造方法 |
JP6769425B2 (ja) * | 2017-11-21 | 2020-10-14 | 三菱マテリアル株式会社 | 絶縁皮膜形成用樹脂、ワニス、電着液、絶縁導体の製造方法 |
TWI646217B (zh) * | 2018-03-09 | 2019-01-01 | 冠宏國際事業有限公司 | Metal fixing member coated with integral insulating resistance film layer and process thereof |
JP7460074B2 (ja) | 2020-04-30 | 2024-04-02 | 二葉産業株式会社 | 線状又は帯状のワークの電着塗装方法及び電着塗装装置 |
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US3850773A (en) * | 1972-06-23 | 1974-11-26 | Gen Electric | Method for making polyimide coated conductors in a continuous manner |
US4051091A (en) | 1974-11-19 | 1977-09-27 | Mitsubishi Denki Kabushiki Kaisha | Water-dispersion varnish for electrodeposition and process for making said water dispersion varnish |
GB1486325A (en) | 1974-11-22 | 1977-09-21 | Mitsubishi Electric Corp | Process for preparing water-dispersion varnish for electrodeposition |
JPS573390Y2 (ja) | 1978-10-07 | 1982-01-21 | ||
JPS6443578A (en) | 1987-08-10 | 1989-02-15 | Mitsubishi Electric Corp | Emulsion for electrodeposition |
CN1163562C (zh) | 1999-01-29 | 2004-08-25 | 日清制油株式会社 | 涂料或油墨组合物 |
JP2002020893A (ja) | 2000-07-06 | 2002-01-23 | Sankyo Seiki Mfg Co Ltd | 電着材料及び電着塗膜形成方法並びにそれを用いた摺動機器 |
WO2004100184A1 (en) | 2003-05-12 | 2004-11-18 | Nippon Paint Co., Ltd. | Method of coating a square wire and an insulated wire of a square wire |
JP5259041B2 (ja) | 2004-08-10 | 2013-08-07 | 株式会社シミズ | 樹脂組成物および水性電着塗料 |
US7497935B2 (en) * | 2004-08-27 | 2009-03-03 | Ppg Industries Ohio, Inc. | Electrodepositable coating compositions and methods related thereto |
JP2007149824A (ja) | 2005-11-25 | 2007-06-14 | Ebara Corp | 成膜方法及び成膜装置 |
JP5555063B2 (ja) | 2010-06-10 | 2014-07-23 | 三菱電線工業株式会社 | ポリイミド電着塗料及びその製造方法 |
FR2995312B1 (fr) | 2012-09-12 | 2015-07-03 | Vallourec Mannesmann Oil & Gas | Procede de preparation d'une dispersion aqueuse stable de polyamide-imide exempte de substance cancerogene, mutage ou reprotoxique et application aux revetements |
US9365592B2 (en) * | 2012-10-12 | 2016-06-14 | Bando Chemical Industries, Ltd. | Bonding composition |
JP6787147B2 (ja) | 2016-02-18 | 2020-11-18 | 三菱マテリアル株式会社 | 電着液及び電着塗装体 |
JP6443578B1 (ja) | 2017-09-29 | 2018-12-26 | 王子ホールディングス株式会社 | 粘着剤組成物、粘着シートおよび積層体 |
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EP3395917A1 (en) | 2018-10-31 |
TW201731979A (zh) | 2017-09-16 |
KR102595402B1 (ko) | 2023-10-27 |
EP3395917A4 (en) | 2019-09-04 |
CN108473813A (zh) | 2018-08-31 |
US20180362802A1 (en) | 2018-12-20 |
KR20180097559A (ko) | 2018-08-31 |
US10800942B2 (en) | 2020-10-13 |
JP6973576B2 (ja) | 2021-12-01 |
JP2017115120A (ja) | 2017-06-29 |
TWI718183B (zh) | 2021-02-11 |
EP3395917B1 (en) | 2020-11-04 |
JP2020180294A (ja) | 2020-11-05 |
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