JPWO2020044894A1 - ウレタン樹脂組成物、及び、積層体 - Google Patents
ウレタン樹脂組成物、及び、積層体 Download PDFInfo
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- JPWO2020044894A1 JPWO2020044894A1 JP2019565040A JP2019565040A JPWO2020044894A1 JP WO2020044894 A1 JPWO2020044894 A1 JP WO2020044894A1 JP 2019565040 A JP2019565040 A JP 2019565040A JP 2019565040 A JP2019565040 A JP 2019565040A JP WO2020044894 A1 JPWO2020044894 A1 JP WO2020044894A1
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- Prior art keywords
- urethane resin
- resin composition
- fatty acid
- preferable
- acid ester
- Prior art date
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Abstract
Description
(X)前記ウレタン樹脂組成物を気泡させて起泡液を得、この起泡液を離型紙上に塗布し、乾燥させ、前記基材(i)と貼り合わせる方法、
(Y)前記ウレタン樹脂組成物を起泡させ起泡液を得、この起泡液を、離型紙上に作製した表皮層上に塗布し、乾燥させ、前記基材(i)と貼り合わせる方法、
(Z)前記ウレタン樹脂組成物を起泡させ起泡液を得、この起泡液を前記基材(i)上に塗布し、乾燥させ、必要に応じて、その上に、離型紙上に作製した表皮層(iii)を貼り合わせる方法などが挙げられる。
ポリエーテル系ポリウレタンディスパージョン(DIC株式会社製「ハイドランWLS−120AR」、固形分50質量%、以下「PUD(A−1)」と略記する。)100質量部、増粘剤(Borchers社製「Borch Gel ALA」)2質量部、ステアリン酸アンモニウム3質量部、架橋剤(日清紡ケミカル株式会社製「カルボジライトSV−02」)4質量部、ポリオキシエチレンラウリルエーテル(式(1)で示される構造の付加モル数;100)3質量部を加え、メカニカルミキサーを使用して3,000rpmで撹拌し、空気を含ませることで、初期の体積に対し、1.5倍の体積にした起泡液を得た。
これを離型紙に塗布し、80℃で3分間乾燥させることで、厚さ300μmのウレタン発泡層を形成し、これをポリエステル繊維不織布と貼り合わせることで、合成皮革を得た。
用いるウレタン樹脂(A)の種類、並びに、成膜助剤(C)の種類及び/又は使用量を表1〜2に示す通りに変更した以外は、実施例1と同様にして合成皮革を得た。
実施例及び比較例において、起泡液を得てから2時間放置前後の起泡液を、走査電子顕微鏡(SEM)により観察し、泡の形状を確認して以下のように評価した。
「T」:泡のサイズの変化が小さく、泡の体積・密度の変化が少ない。
「F」:泡のサイズが非常に大きくなっている、又は、泡が消失して密度が高くなっている。
実施例及び比較例で得られた合成皮革の外観を観察し、クラックの有無を確認した。クラックがないものを「T」、クラックが確認されたものを「F」と評価した。
実施例及び比較例で得られた合成皮革を手で触り、以下のように評価した。
「T」:柔軟性と弾力がある
「F」:柔軟性が劣り、硬い。
「PUD(A−2)」:ポリカーボネート系ポリウレタンディスパージョン(DIC株式会社製「ハイドランWLS−110AR」、固形分50質量%)
「PUD(A−3)」:エステル系ポリウレタンディスパージョン(DIC株式会社製「ハイドランADS−110」、固形分50質量%)
Claims (9)
- ウレタン樹脂(A)、水(B)、及び、成膜助剤(C)を含有するウレタン樹脂組成物であって、前記成膜助剤(C)が、ポリオキシエチレンアルキルエーテル(c−1)、ポリオキシエチレンソルビタン脂肪酸エステル(c−2)、及び、ポリグリセリン脂肪酸エステル(c−3)からなる群より選ばれる1種以上であることを特徴とするウレタン樹脂組成物。
- 前記ポリオキシエチレンソルビタン脂肪酸エステル(c−2)における、上記式(1)で示される構造の付加モル数が、30以上である請求項1又は2記載のウレタン樹脂組成物。
- 前記ポリグリセリン脂肪酸エステル(c−3)のHLB値が、5以上である請求項1〜3のいずれか1項記載のウレタン樹脂組成物。
- 前記ウレタン樹脂(A)が、アニオン性基を有するものである請求項1〜4のいずれか1項記載のウレタン樹脂組成物。
- 更に、炭素原子数が10以上の疎水部を有する界面活性剤(D)を含有するものである請求項1〜5のいずれか1項記載のウレタン樹脂組成物。
- 前記界面活性剤(D)が、ステアリン酸塩である請求項6記載のウレタン樹脂組成物。
- 少なくとも、基材(i)、及び、請求項1〜7のいずれか1項記載のウレタン樹脂組成物により形成された発泡層(ii)を有することを特徴とする積層体。
- 前記発泡層(ii)が、前記ウレタン樹脂組成物を機械発泡することにより形成されたものである請求項8記載の積層体。
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