JP6641389B2 - 自動車用水溶性塗料組成物 - Google Patents
自動車用水溶性塗料組成物 Download PDFInfo
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- JP6641389B2 JP6641389B2 JP2017562272A JP2017562272A JP6641389B2 JP 6641389 B2 JP6641389 B2 JP 6641389B2 JP 2017562272 A JP2017562272 A JP 2017562272A JP 2017562272 A JP2017562272 A JP 2017562272A JP 6641389 B2 JP6641389 B2 JP 6641389B2
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- 125000004432 carbon atom Chemical group C* 0.000 claims description 11
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- 239000003795 chemical substances by application Substances 0.000 claims description 9
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- 239000002245 particle Substances 0.000 claims description 8
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- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 3
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- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- VHSHLMUCYSAUQU-UHFFFAOYSA-N 2-hydroxypropyl methacrylate Chemical compound CC(O)COC(=O)C(C)=C VHSHLMUCYSAUQU-UHFFFAOYSA-N 0.000 description 2
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- FIHBHSQYSYVZQE-UHFFFAOYSA-N 6-prop-2-enoyloxyhexyl prop-2-enoate Chemical compound C=CC(=O)OCCCCCCOC(=O)C=C FIHBHSQYSYVZQE-UHFFFAOYSA-N 0.000 description 2
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- JGFBRKRYDCGYKD-UHFFFAOYSA-N dibutyl(oxo)tin Chemical compound CCCC[Sn](=O)CCCC JGFBRKRYDCGYKD-UHFFFAOYSA-N 0.000 description 2
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- UFDHBDMSHIXOKF-UHFFFAOYSA-N tetrahydrophthalic acid Natural products OC(=O)C1=C(C(O)=O)CCCC1 UFDHBDMSHIXOKF-UHFFFAOYSA-N 0.000 description 1
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Description
本明細書において、用語『(メタ)アクリル』は、アクリル及びメタクリルを全て含む概念である。
2Lの四ッ口丸形フラスコに熱電対、撹拌機、還流器を取り付け、脱イオン水550g及び反応性乳化剤(ラテムルS-180A、花王社製)3.43gを投入した後、反応器の温度を80℃に昇温させた。反応器を昇温させる間、分液漏斗Aに脱イオン水150g、ラテムルS-180A 15.58g、ブチルアクリレート166.66g、メタクリル酸93.21g及びトリアリールイソシアヌレート0.13gからなる予備乳化液を、分液漏斗Bに脱イオン水25.0g及び過硫酸アンモニウム0.38gからなる開始剤溶液を、分液漏斗Cに脱イオン水30.0g及び過硫酸アンモニウム0.14gからなる開始剤溶液をそれぞれ投入した。反応器が80℃に維持されたとき、分液漏斗Aの予備乳化液中の21.78g及び分液漏斗Bの開始剤水溶液を同時に滴下させ、40分間維持させた。シードの形成後、分液漏斗Cの開始剤水溶液を10分間滴下させ、分液漏斗Aの予備乳化液を3時間の間滴下させた。1時間の間反応を維持した後50℃に冷却させ、400meshのフィルターでろ過しながら包装した。合成されたエマルジョンコア粒子の粒径はLLSで測定した時に120nmであり、固形分の含量は26.0重量%であった。
撹拌機、温度計、還流冷却器及び窒素導入管を備えたポリエステル樹脂製造用反応器に、アジピン酸351g、イソフタル酸117g、トリメチロールプロパン47g、ネオペンチルグリコール81g、1,6-ヘキサンジオール293g、触媒としてジブチルすずオキシド0.1gを投入し、150℃から230℃まで3時間かけて昇温させた後、230℃で5時間の間維持した。その後、反応器の内部を160℃まで冷却し、トリメリト酸無水物33gを加えた後1時間の間撹拌し、酸価27mgKOH/g、数平均分子量1,200のポリエステル樹脂を得た。
撹拌機、温度計、還流冷却器及び窒素導入管を備えたポリエステル樹脂製造用反応器に、ダイマー酸(酸価295mgKOH/g、Pripol 1017、Croda)97g、イソフタル酸117g、トリメチロールプロパン45g、ネオペンチルグリコール90g、1,6-ヘキサンジオール208g、触媒としてジブチルすずオキシド0.1gを投入し、150℃から230℃まで3時間の間昇温した後、230℃で5時間の間維持した。その後、反応器の内部を160℃まで冷却させ、トリメリト酸無水物34gを加えた後1時間の間撹拌し、90℃まで冷却した後n-ブタノール240gを投入し、固形分70重量%、酸価27mgKOH/g、数平均分子量1,100のダイマー-変性ポリエステル樹脂を得た。
分子量2,000のポリエステルポリオール260重量部、ジメチロールプロピオン酸12重量部、N-メチルピロリドン70重量部を反応容器に入れて65℃に昇温した。ここにイソホロンジイソシアネート68重量部を徐々に投入した。以後80℃まで昇温し、NCO 2.4%に維持してプレポリマーを製造した。イオン交換水520重量部及びトリエチルアミン7重量部を混合して25から35℃で高速に撹拌しながら、前記プレポリマーを20分間にわたって投入して水分散体を形成させた。その後、イオン交換水58重量部とエチレンアミン5重量部の混合物を投入して鎖延長させ、酸価20mgKOH/g、固形分35重量%のポリウレタン分散型樹脂を製造した。
分子量2,000のポリエステルポリオール260重量部、ジメチロールプロピオン酸12重量部、N-メチルピロリドン70重量部を反応容器に入れて65℃に昇温した。ここにイソホロンジイソシアネート68重量部を徐々に投入した。以後80℃まで昇温し、NCO 2.4%に維持してプレポリマーを製造した。イオン交換水520重量部及びトリエチルアミン7重量部を混合して25から35℃で高速に撹拌しながら、前記プレポリマーを20分間にわたって投入して水分散体を形成させた。その後、イオン交換水58重量部とエチレンアミン5重量部の混合物を投入して鎖延長させ、酸価20mgKOH/g、固形分35重量%の自己乳化型ウレタン水分散体を製造した。
前記製造例で得られた樹脂成分等を用いて自動車用水溶性塗料組成物を製造した。下記表1に示した順に成分等を混合しながら、最終の粘度をフォードカップ♯4で55秒に合わせた。電着面の上に、製造されたそれぞれの自動車用水溶性塗料組成物で第1ベースコート(乾燥塗膜の厚さ:12〜16マイクロン)及び第2ベースコート(乾燥塗膜の厚さ:10〜20マイクロン)をベル塗装した後、80℃で3分間ホットエアを吹いて塗料内に残存する水を蒸発させた。その上に上塗り透明塗料を塗装し、一般のオーブンで140から150℃で20から30分間硬化させて最終の塗膜を形成させた。最終の塗膜の外観及び物性等を測定し、その結果を下記表2に示した。
- 共溶剤1:エチレングリコールモノブチルエーテル
- 共溶剤2:n-プロピルアルコール
- 共溶剤3:N-メチルピロリドン
- メラミン硬化剤:イミノ基を含有するメラミン樹脂
- 触媒:ドデシルベンゼンスルホン酸タイプ酸触媒
- 湿潤剤:アセチレンアルコール型湿潤剤
- 紫外線吸収剤:ベンゾトリアゾール系紫外線吸収剤
- 顔料:アルミニウムペースト(金属顔料EMR D5620(TOYO))
- 増粘剤:アルカリ溶解増粘剤(AM-3、San Nopco)
- 中和剤:アミン系中和剤(アミノメチルプロパノール10%水溶液(AMP-95、Angus)
- 塗装作業性:塗料の吐出しの際に噴霧状態が良好であり、素地への濡れ性が良好であること。
- 塗膜外観:自動車外観測定器であるWave Scan DOI(BYK Gardner)を適用して最終のCF valueを測定(高いほど有利である)。測定の結果は、◎-優秀(CF 65以上)、○-良好(CF 60以上65未満)、△-普通(CF 55以上60未満)、X-不良(CF 55未満)で表す。
- 光沢:20度光沢90以上であること。
- オーバーベーク再塗装付着性:150℃で20分間最終塗膜の硬化後、150℃で60分間オーバーベークした後、上塗り塗料と透明上塗り塗料を再塗装及び硬化させてから、付着性テストを実施する(2mmのクロスカットを100個製作た後、スコッチテープを使って引き剥がした場合に問題がない時に『良好』と判断。刃のクロスカッティング部位からも落ちるものがない時に『優秀』と判断。その他には『不良』と判断)。
- 耐衝撃性:500gの錘を使って30cm以上の高さから落とした時、塗膜に割れ目及び剥離がないこと。
- 耐水性:40℃の恒温槽に完成された塗膜を10日間沈漬た後、付着試験及び変色評価
- 塗料流動性:電着、中塗りを塗装した試片を垂直に掛けておき、上塗りを各条件で塗装して硬化させた後で観察した時、塗料の流れや光沢の低下などがないこと。
- 耐寒チッピング性:-20℃で3時間放置した後、50gのチッピングストーンを使って4barの圧力で50gのチッピングストーンを押し出し、塗膜の表面を打つ方法を用いる(1mm以下の大きさの損傷が10個以下である時に『優秀』と判定。1mm超過2mm以下の大きさの損傷が10個以下である時に『良好』と判定。2mm超過3mm以下の大きさの損傷が10個以下である時に『普通』と判定)。
Claims (6)
- コア/シェルマイクロゲル樹脂、ダイマー酸変性ポリエステル樹脂、(メタ)アクリル変性ポリウレタン樹脂、硬化剤、顔料及び水を含み、
前記コア/シェルマイクロゲル樹脂の含量が塗料組成物100重量%を基準に5から40重量%であり、
前記ダイマー酸変性ポリエステル樹脂の含量が塗料組成物100重量%を基準に1から10重量%であり、
前記コア及びシェル成分は、それぞれ独立して、アクリル酸、メタクリル酸、炭素数1から8のアルキル基を有するアクリル酸アルキルエステル、炭素数1から4のアルキル基を有するメタクリル酸アルキルエステル、芳香族ビニル化合物、ビニルシアン化合物、少なくとも一つ以上の水酸基を含む炭素数5から8のアルキル基を有するヒドロキシアルキルアクリレート、及び少なくとも一つ以上の水酸基を含む炭素数5から8のアルキル基を有するヒドロキシアルキルメタクリレートからなる群より選択される少なくとも一つの不飽和単量体を含む、自動車用水溶性塗料組成物。 - コア/シェルマイクロゲル樹脂が、樹脂の総重量を基準に、30から70%の固形分含量、5から60mgKOH/gの酸価、-15から20℃のガラス転移温度及び50から200nmの粒子サイズを有するものである、請求項1に記載の自動車用水溶性塗料組成物。
- ダイマー酸変性ポリエステル樹脂が、ダイマー酸を含むジカルボン酸成分と、ダイマー酸の還元ジオールを含む多価アルコール成分とを縮重合反応させて得られるポリエステル樹脂である、請求項1に記載の自動車用水溶性塗料組成物。
- ダイマー酸変性ポリエステル樹脂が、樹脂の総重量を基準に、60から90%の固形分含量、5から40mgKOH/gの酸価、1,000から4,000の数平均分子量及び-40から-20℃のガラス転移温度を有するものである、請求項1に記載の自動車用水溶性塗料組成物。
- (メタ)アクリル変性ポリウレタン樹脂が、ポリオールとイソシアネートの反応生成物であるウレタンプレポリマーを一つ以上の(メト)アクリレートと反応させて得られる変性ポリウレタン樹脂である、請求項1に記載の自動車用水溶性塗料組成物。
- (メタ)アクリル変性ポリウレタン樹脂が、樹脂の総重量を基準に、30から60%の固形分含量、8,000から100,000の数平均分子量、15から35mgKOH/gの酸価及び50から200nmの粒子サイズを有するものである、請求項1に記載の自動車用水溶性塗料組成物。
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CN110655857B (zh) * | 2019-11-05 | 2022-03-18 | 立邦涂料(中国)有限公司 | 一种适用于湿喷湿工艺的水性色漆及其应用 |
CN113150257B (zh) * | 2021-02-26 | 2023-06-13 | 南雄市三本化学科技有限公司 | 一种聚酯树脂及其制备方法和在湿碰湿工艺中的应用 |
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CN107667154B (zh) | 2020-04-14 |
JP2018524424A (ja) | 2018-08-30 |
US20180163088A1 (en) | 2018-06-14 |
KR20160142668A (ko) | 2016-12-13 |
EP3305865B1 (en) | 2019-11-20 |
CN107667154A (zh) | 2018-02-06 |
US10876016B2 (en) | 2020-12-29 |
EP3305865A1 (en) | 2018-04-11 |
KR101732918B1 (ko) | 2017-05-08 |
EP3305865A4 (en) | 2018-05-09 |
WO2016195390A1 (ko) | 2016-12-08 |
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