JP2021147596A - 一液型水性塗料組成物 - Google Patents
一液型水性塗料組成物 Download PDFInfo
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- JP2021147596A JP2021147596A JP2020052031A JP2020052031A JP2021147596A JP 2021147596 A JP2021147596 A JP 2021147596A JP 2020052031 A JP2020052031 A JP 2020052031A JP 2020052031 A JP2020052031 A JP 2020052031A JP 2021147596 A JP2021147596 A JP 2021147596A
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- 125000000582 cycloheptyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
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- 239000000539 dimer Substances 0.000 description 1
- YXXXKCDYKKSZHL-UHFFFAOYSA-M dipotassium;dioxido(oxo)phosphanium Chemical compound [K+].[K+].[O-][P+]([O-])=O YXXXKCDYKKSZHL-UHFFFAOYSA-M 0.000 description 1
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- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
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- WTFXARWRTYJXII-UHFFFAOYSA-N iron(2+);iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Fe+2].[Fe+3].[Fe+3] WTFXARWRTYJXII-UHFFFAOYSA-N 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
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- 229940035429 isobutyl alcohol Drugs 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 150000004658 ketimines Chemical class 0.000 description 1
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- 239000010985 leather Substances 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 239000000944 linseed oil Substances 0.000 description 1
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- 239000007788 liquid Substances 0.000 description 1
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 description 1
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- 229910000157 magnesium phosphate Inorganic materials 0.000 description 1
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
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- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- 239000000454 talc Substances 0.000 description 1
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- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
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- XWKBMOUUGHARTI-UHFFFAOYSA-N tricalcium;diphosphite Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])[O-].[O-]P([O-])[O-] XWKBMOUUGHARTI-UHFFFAOYSA-N 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- WQEVDHBJGNOKKO-UHFFFAOYSA-K vanadic acid Chemical compound O[V](O)(O)=O WQEVDHBJGNOKKO-UHFFFAOYSA-K 0.000 description 1
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- 239000011701 zinc Substances 0.000 description 1
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Abstract
Description
(A)エポキシエステル樹脂、
(B)アクリル樹脂、および、
(C)乾性油または乾性油の重合物から選択される少なくとも一種の化合物、
とを含有する一液型水性塗料組成物。
2. 前記一液型水性塗料組成物の固形分中における前記(A)エポキシエステル樹脂の含有量が5〜30質量%である前記1記載の一液型水性塗料組成物。
3. 前記一液型水性塗料組成物の固形分中における前記(C)乾性油または乾性油の重合物から選択される少なくとも一種の化合物の含有量が0.1〜5.0質量%である前記1または2記載の一液型水性塗料組成物。
4. 前記(A)エポキシエステル樹脂が、ビニル変性エポキシエステル樹脂である前記1〜3のいずれかに記載の一液型水性塗料組成物。
5. (D)酸化促進剤を含有する前記1〜4のいずれかに記載の一液型水性塗料組成物。
<一液型水性塗料組成物>
本発明の一液型水性塗料組成物は、少なくとも、(A)エポキシエステル樹脂、(B)アクリル樹脂、および、(C)乾性油または乾性油の重合物から選択される少なくとも一種の化合物、とを含有することを特徴とする。
本発明のエポキシエステル樹脂は,通常のエポキシエステル樹脂を使用することができる。例えば、エポキシ樹脂と脂肪族酸などの酸との付加物、さらに該付加物とジイソシアネ−ト化合物やヒドロキシカルボン酸との反応生成物、さらにそのビニル変性物等が挙げられる。特にビニル変性エポキシエステル樹脂であることが好ましい。
Tm,Tgは、JISK7121-1987に準じDSCによって測定することができる。
(A)エポキシエステル樹脂は、固形分として20〜60質量%の水分散物とすることが好ましい。
本発明の(B)アクリル樹脂は、炭素数1〜18のアルキル(メタ)アクリレートを30〜100質量%有し、その他スチレン系モノマー(スチレン、α-メチルスチレン等)、酢酸ビニル、オレフィン(塩化ビニル、塩化ビニリデン、ブタジエン、プロピレン等)等を共重合させた樹脂である。
1/Tg=W1/Tg1+W2/Tg2+・・・+Wi/Tgi+・・・+Wn/Tgn
上記FOX式において、Tgは、n種類のモノマーからなるポリマーのガラス転移温度(K)であり、Tg(1、2、i、n)は、各モノマーのホモポリマーのガラス転移温度(K)であり、W(1、2、i、n)は、各モノマーの質量分率であり、W1+W2+・・・+Wi+・・・+Wn=1である。
本発明の乾性油は、そのヨウ素価が130以上である。140以上であるのが好ましい。また、分子内に共役二重結合を有し、分子内の共役二重結合の数が、1分子に含まれる二重結合の数の25%以上である。また、1分子の乾性油に含まれる共役二重結合の数は、1分子に含まれる二重結合の全数の、30%以上であるのが好ましく、50%以上であるのがより好ましい。
本発明の硬化促進剤としては、水を溶剤とする金属石鹸を使用することができる。金属成分としては、コバルト、マンガン、錫、鉛化合物等を挙げることができ、例えば、テトライソプロピルチタネート、ジブチル錫ラウレート、ジブチル錫アセテート、ジブチル錫ジオクテート、ナフテン酸コバルト、ナフテン酸鉛、ナフテン酸ジルコニウム、オクチル酸コバルト、オクチル酸ジルコニウム等の金属化合物類等が挙げられる。
本発明の塗料組成物において、不揮発分の含有量は、55〜73質量%であることが好ましく、55〜65質量%であることがより好ましい。また、本発明の水性塗料組成物において、不揮発分中における水分散性樹脂の含有量は、15〜45質量%であることが好ましく、27〜43質量%であることがより好ましい。
本発明の塗料組成物には、その他の成分として、各種樹脂、顔料、有機溶剤、表面調整剤、湿潤剤、分散剤、乳化剤、増粘剤、沈降防止剤、皮張り防止剤、たれ防止剤、消泡剤、色分かれ防止剤、レベリング剤、乾燥剤、可塑剤、成膜助剤、防カビ剤、抗菌剤、殺虫剤、光安定化剤、紫外線吸収剤、帯電防止剤及び導電性付与剤等を目的に応じて適宜配合することができる。これら成分は、市販品を好適に使用することができる。
本発明の塗料組成物は、必要に応じて適宜選択される各種成分を混合することによって調製できる。
本発明の塗料組成物は、鋼材表面に見られるような黒皮が表面に付着した鋼材に対して特に好適に塗装を行うことができる(図1)。図1では、黒皮部に存在する凹凸が確認できる。通常、黒皮が付着した基材は、黒皮の隙間等に油分が多く存在しており、優れた油面適性が求められる。本発明の塗料組成物は、その他アルミニウム、ステンレス等の建機基材に対しても使用することができる。
表1に示す配合(数値は質量部である)より、エポキシエステル樹脂水分散物、顔料、分散剤を予め混合した後に、ビーズミルにて分散処理した。この分散処理後の混合物をアクリル樹脂水分散物に撹拌しながら加えた後、その他の原料も同様に撹拌しながら加え、水性塗料組成物(実施例1〜8、比較例1〜6)を得た。
・ウォーターゾールEFD−5560:ビニル変性エポキシエステル樹脂ディスパージョン、DIC株式会社製、NV;40質量%
・ウォーターゾールEFD−5580:エポキシエステル樹脂ディスパージョン、DIC株式会社製、NV;40質量%
・アクロナール295DN:スチレン・アクリル樹脂ディスパージョン、BASF社製、NV;50質量%
・アクリセットPJ−717:アクリル樹脂エマルジョン、株式会社日本触媒製、NV;45質量%
・ヨドゾールAD201:スチレン・アクリル樹脂エマルジョン、ヘンケルジャパン株式会社製、NV46質量%
・ポリゾールAP−6750:スチレン・アクリル樹脂エマルジョン、昭和電工株式会社製、NV;45質量%
・LTボイル油:亜麻仁油と桐油の混合物、マルニ製油社製
・DICNATE3111:Co系金属石鹸、DIC株式会社製
・着色顔料:MA100、三菱ケミカル株式会社製
・防食顔料:K-White ♯140W、テイカ株式会社製
・体質顔料:サンライトSL−1000、竹原化学工業株式会社製
・分散剤:Disperbyk−190、ビックケミー・ジャパン株式会社製
・消泡剤:byk−093、ビックケミー・ジャパン株式会社製
・増粘剤:チクゾールK−130B、共栄社化学株式会社製
・表面調整剤:byk−307、ビックケミー・ジャパン株式会社製
・成膜助剤:2,2,4−トリメチル−1,3−ペンタンジオールモノイソブチレート
実施例1〜8、比較例1〜6の塗料を、各々、耐水ペーパー#180にて研磨済みの冷間圧延鋼板(JIS G3141、150×70×0.8mm、洗浄溶剤にて脱脂)に、乾燥膜厚が45μmとなるようスプレー塗装した。得られた塗膜を23℃及び50%RH雰囲気下で1週間乾燥し、目的とする塗板を得た。得られた塗板の裏面及び側面をポリエステルテープ(日東電工株式会社製)でシールし、付着性試験、耐食性試験、耐水性試験に供した。
実施例1〜8、比較例1〜6の塗料を、各々、構造用鋼板(黒皮鋼板)(JIS G3101、150×70×1.6mm、洗浄溶剤にて脱脂)に、得られた塗膜を23℃及び50%RH雰囲気下で1週間乾燥し、目的とする塗板を得た。得られた試験板の裏面及び側面をポリエステルテープ(日東電工株式会社製)でシールし、付着性試験、耐食性試験、耐水性試験に供した。
塗膜にカッターナイフにて2mm幅のマスを100個作製し、その後セロハンテープ(ニチバン社製)を貼り付け、指で圧着した後、セロハンテープを一気に引き剥がし、残存する塗膜のマス目を数えた。評価基準は以下の通りとした。
◎:100/100
○:99/100〜95/100
×:94/100以下
塗板に予めカッターナイフにて素地に達する、30°の角度で交わるよう長さ10cmの2本のキズを付ける。その試験板を槽内温度35℃、5%塩化ナトリウム水を連続で噴霧する塩水噴霧試験機にて240時間試験を行った。装置から取り出し、水道水で試験面の塩水を粗い流し、水分を取り除く。その後直ちに試験面に付けたキズからの腐食幅を測定する。評価基準は以下の通りとした。
塩水噴霧(240h)後の腐食幅
◎:2mm以下
○:2〜5mm
×:5mm以上
塗板作製方法1および2で得られた塗板を20±5℃の水に504時間浸漬した後、水洗し、2時間風乾し、塗膜の外観を目視で判定した。
◎:塗膜に割れ、はがれ、ふくれ、錆が無く、著しい変色、つやの変化、軟化等の異常が無い。
〇:塗膜に変色、つやの低下が認められるが、その他の異常はない。
×:塗膜に割れ、はがれ、ふくれ、錆等の異常が発生。
Claims (5)
- 少なくとも、
(A)エポキシエステル樹脂、
(B)アクリル樹脂、および、
(C)乾性油または乾性油の重合物から選択される少なくとも一種の化合物、
とを含有する一液型水性塗料組成物。 - 前記一液型水性塗料組成物の固形分中における前記(A)エポキシエステル樹脂の含有量が5〜30質量%である請求項1記載の一液型水性塗料組成物。
- 前記一液型水性塗料組成物の固形分中における前記(C)乾性油または乾性油の重合物から選択される少なくとも一種の化合物の含有量が0.1〜5.0質量%である請求項1または2記載の一液型水性塗料組成物。
- 前記(A)エポキシエステル樹脂が、ビニル変性エポキシエステル樹脂である請求項1〜3のいずれかに記載の一液型水性塗料組成物。
- (D)酸化促進剤を含有する請求項1〜4のいずれかに記載の一液型水性塗料組成物。
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