JP2021161163A - 2液硬化型ポリウレタン組成物 - Google Patents
2液硬化型ポリウレタン組成物 Download PDFInfo
- Publication number
- JP2021161163A JP2021161163A JP2020061893A JP2020061893A JP2021161163A JP 2021161163 A JP2021161163 A JP 2021161163A JP 2020061893 A JP2020061893 A JP 2020061893A JP 2020061893 A JP2020061893 A JP 2020061893A JP 2021161163 A JP2021161163 A JP 2021161163A
- Authority
- JP
- Japan
- Prior art keywords
- reaction
- allophanate
- mass
- xylylene diisocyanate
- bismuth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Landscapes
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Abstract
Description
、2液硬化型ポリウレタン組成物を含んでいる。
低分子量ポリオールは、水酸基を2つ以上有する数平均分子量300未満、好ましくは、400未満、例えば、40以上の化合物であって、例えば、エチレングリコール、プロピレングリコール、1,3−プロパンジオール、1,4−ブタンジオール、1,3−ブタンジオール、1,2−ブタンジオール、1,5−ペンタンジオール、1,6−ヘキサンジオール、ネオペンチルグリコール、3−メチル−1,5−ペンタンジオール、2,2,2−トリメチルペンタンジオール、3,3−ジメチロールヘプタン、アルカン(C7〜20)ジオール、1,3−または1,4−シクロヘキサンジメタノールおよびそれらの混合物、1,3−または1,4−シクロヘキサンジオールおよびそれらの混合物、水素化ビスフェノールA、1,4−ジヒドロキシ−2−ブテン、2,6−ジメチル−1−オクテン−3,8−ジオール、ビスフェノールA、ジエチレングリコール、トリエチレングリコール、ジプロピレングリコールなどの2価アルコール、例えば、グリセリン、トリメチロールプロパン、トリイソプロパノールアミンなどの3価アルコール、例えば、テトラメチロールメタン(ペンタエリスリトール)、ジグリセリンなどの4価アルコール、例えば、キシリトールなどの5価アルコール、例えば、ソルビトール、マンニトール、アリトール、イジトール、ダルシトール、アルトリトール、イノシトール、ジペンタエリスリトールなどの6価アルコール、例えば、ペルセイトールなどの7価アルコール、例えば、ショ糖などの8価アルコールなどが挙げられる。
撹拌機、温度計、冷却器および窒素ガス導入管を備えた容量1リットルの四つ口フラスコに、窒素雰囲気下、1,3−キシリレンジイソシアネート(三井化学社製、m−XDI)100質量部と、イソブチルアルコール(IBA)15.8質量部(当量比NCO/OH=5)と、トリス(2−エチルヘキシル)ホスファイト(酸化防止剤)0.06質量部と、ペンタエリスリトールテトラキス[3−(3,5−ジ−t−ブチル−4−ヒドロキシフェニル)プロピオネート](酸化防止剤)0.06質量部とを仕込み、75℃で3.5時間、ウレタン化反応させた。これにより、ウレタン化物を得た。
撹拌機、温度計、冷却器および窒素ガス導入管を備えた容量1リットルの四つ口フラスコに、窒素雰囲気下、1,3−キシリレンジイソシアネート(三井化学社製、m−XDI)100質量部と、イソブチルアルコール(IBA)15.8質量部(当量比NCO/OH=5)と、トリス(2−エチルヘキシル)ホスファイト(酸化防止剤)0.06質量部と、ペンタエリスリトールテトラキス[3−(3,5−ジ−t−ブチル−4−ヒドロキシフェニル)プロピオネート](酸化防止剤)0.06質量部とを仕込み、75℃で3.5時間、ウレタン化反応させた。これにより、ウレタン化物を得た。
・2液硬化型ポリウレタン組成物
表1〜表5に記載の処方で、アクリルポリオール(商品名:オレスターQ182、水酸基価42mgKOH/g)と、反応遅延剤と、溶剤(酢酸ブチル/PMA/酢酸エチル=1/1/1(質量比))とを、10分間混合した。
ベースコート層が形成された基材を準備し、そのベースコート層の上に、上記の2液硬化型ポリウレタン組成物(樹脂キット)を用いて、クリアコート層を形成した。
(1)反応遅延剤溶解性
クリアコート液における反応遅延剤の溶解性を、目視により確認した。
クリアコート液の可使時間(ポットライフ)を、以下の方法で評価した。
クリアコート液の色相を、以下の方法で評価した。
クリアコート液の硬化乾燥性を、以下の方法で評価した。
クリアコート層(ポリウレタン樹脂)の鉛筆硬度を、JIS K 5600(1999年)の手かき法に従い、測定した。
クリアコート層(ポリウレタン樹脂)の耐衝撃性を、JIS K 5600(1999年)のデュポン式試験法に従い、500gのおもりを用いて測定した。
Claims (3)
- 硬化剤と主剤と反応遅延剤とを含む2液硬化型ポリウレタン組成物であって、
前記硬化剤は、キシリレンジイソシアネートのアロファネート誘導体およびビスマスを含むポリイソシアネート成分を含有し、
前記主剤は、ポリオール成分を含有し、
前記反応遅延剤は、マルトールおよび/または没食子酸アルキルエステルを含有する
ことを特徴とする、2液硬化型ポリウレタン組成物。 - 前記没食子酸アルキルエステルが、没食子酸エチルエステルを含む
ことを特徴とする、請求項1に記載の2液硬化型ポリウレタン組成物。 - ビスマス1モルに対して、マルトールおよび没食子酸アルキルエステルの総量が、5モル以上5000モル以下である
ことを特徴とする、請求項1または2に記載の2液硬化型ポリウレタン組成物。
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