TWI779193B - 聚胺酯預聚物、接著劑、及合成人造皮 - Google Patents
聚胺酯預聚物、接著劑、及合成人造皮 Download PDFInfo
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Abstract
本發明之聚胺酯預聚物係使多元醇與多異氰酸酯反應而獲得者,上述多元醇包含:聚醚多元醇(A)30質量%以上、包含源自間苯二甲酸之結構及源自癸二酸之結構作為源自二元酸之部分結構的聚酯多元醇(B)30質量%以上、及僅包含源自癸二酸之結構作為源自二元酸之部分結構之聚酯多元醇(C)20質量%以下,上述聚醚多元醇(A)之數量平均分子量為1100~2400,且上述多異氰酸酯之異氰酸酯基當量相對於上述多元醇之羥基當量之莫耳比為2.1以下。
Description
本發明係關於一種聚胺酯預聚物、接著劑、及合成人造皮。
聚胺酯預聚物被用於接著劑、塗料、密封材料等,尤其是濕氣硬化型之聚胺酯預聚物具有由於可利用空氣中之水分硬化故而可以一液使用之優勢。如上述之聚胺酯預聚物係分子內具有可與空氣中或塗佈有該聚胺酯預聚物之基材中所存在之水(濕氣)反應而形成交聯結構之官能基(例如異氰酸酯基)之化合物,未硬化且於常溫下為液體或者固體狀者,根據用途而開發出多種多樣之聚胺酯預聚物。
例如,專利文獻1揭示有一種液狀聚胺酯預聚物,其係藉由使4,4'-二苯甲烷二異氰酸酯、至少1種聚醚多元醇、及僅包含間苯二甲酸部分與己二酸部分作為源自二元酸之部分結構但實質上不包含鄰苯二甲酸部分及對苯二甲酸部分之至少1種聚酯多元醇反應而獲得。記載有該液狀聚胺酯預聚物可藉由曝露於濕氣或含活性氫之硬化劑中而硬化,於如ABS(丙烯腈-丁二烯-苯乙烯共聚物)之對低表面能量之表面顯示良好之接著性之無溶劑接著劑之製造中有用。
然而,作為製作如人工皮革或合成皮革之合成人造皮時使用之接著劑,亦使用聚胺酯預聚物。該合成人造皮被用於鞋子、衣服、包、傢俱、車輛內飾材料(例如儀錶面板、門、控制台、座椅片材)等多種
多樣之用途。合成人造皮通常成為具有表皮層、接著劑層及基材層之積層體,於形成上述接著劑層時使用各種聚胺酯預聚物。於上述用途中,除要求良好之柔軟性以外,亦要求尤其是寒冷地區中之良好之彎曲性、即耐寒彎曲性。
專利文獻1:日本專利第5563482號公報
又,合成人造皮所使用之基材多為多孔質者,若將通常之聚胺酯預聚物塗佈於此種基材,則存在滲透至內部而無法獲得接著強度之情況。即,對如上述之基材之接著,必須某種程度上抑制滲透,但專利文獻1關於此種課題未作任何記載。
進而,只要以能夠某種程度上確保硬化時間(open time)之方式控制硬化性,則具有針對對複雜形狀等之施工可提高作業性之優勢。
根據以上,本發明提供一種發揮良好之柔軟性及耐寒彎曲性且具有優異之硬化性之聚胺酯預聚物。
為了解決上述課題而進行努力研究,結果本發明者等人發現,藉由使包含特定3種多元醇之多元醇與多異氰酸酯以特定當量比反應而獲得之聚胺酯預聚物可解決該課題,從而想到本發明。即,本發明如下所述。
[1]一種聚胺酯預聚物,其係使多元醇與多異氰酸酯反應而
獲得者,上述多元醇包含:聚醚多元醇(A)30質量%以上、包含源自間苯二甲酸之結構及源自癸二酸之結構作為源自二元酸之部分結構的聚酯多元醇(B)30質量%以上、及僅包含源自癸二酸之結構作為源自二元酸之部分結構之聚酯多元醇(C)20質量%以下,上述聚醚多元醇(A)之數量平均分子量為1100~2400,且上述多異氰酸酯之異氰酸酯基當量相對於上述多元醇之羥基當量之比為2.1以下。
[2]如[1]所記載之聚胺酯預聚物,其中上述多異氰酸酯包含4,4'-二苯甲烷二異氰酸酯。
[3]如[1]或[2]所記載之聚胺酯預聚物,其中上述多異氰酸酯成分之異氰酸酯基當量相對於上述多元醇之羥基當量之莫耳比為1.5~2.1。
[4]如[1]至[3]中任一項所記載之聚胺酯預聚物,其中上述多異氰酸酯係碳數4~10之直鏈型脂肪族二異氰酸酯,且該聚胺酯預聚物包含10~50莫耳量%之上述碳數4~10之直鏈型脂肪族二異氰酸酯。
[5]如[1]至[4]中任一項所記載之聚胺酯預聚物,其中上述聚醚多元醇(A)以30:70~70:30之質量比包含數量平均分子量700~1300之聚醚多元醇(A-1)與數量平均分子量2700~3300之聚醚多元醇(A-2)。
[6]如[1]至[5]中任一項所記載之聚胺酯預聚物,其軟化點落於30~100℃之範圍內,且100℃下之熔融黏度為110dPa‧s以下。
[7]如[1]至[6]中任一項所記載之聚胺酯預聚物,其含有相對於上述聚胺酯預聚物100質量份為30質量份以下之具有官能基數3~5之末端異氰酸酯基之多異氰酸酯交聯劑。
[8]一種接著劑,其含有如[1]至[7]中任一項所記載之聚胺酯預聚物。
[9]如[8]所記載之接著劑,其用於合成人造皮。
[10]一種合成人造皮,其於表皮層與基材之間具有接著劑層,且上述接著劑層係如[1]至[7]中任一項所記載之聚胺酯預聚物之硬化物層。
根據本發明,可提供一種發揮良好之柔軟性及耐寒彎曲性且具有優異之硬化性之聚胺酯預聚物。再者,所謂本說明書中之「優異之硬化性」,意指於塗佈該預聚物後與基材進行接著之步驟中,於與基材進行接著之前之期間內,確保維持黏性之時間,並且貼合後迅速開始硬化之性質。
以下,對本發明之實施形態(本實施形態)詳細地進行說明,但本發明並不限定於該實施形態。
本實施形態之聚胺酯預聚物係使特定之多元醇與多異氰酸酯反應而獲得。使用聚醚多元醇(A)、聚酯多元醇(B)、及聚酯多元醇(C)之至少3種作為作為特定之多元醇,並調整該等之含量等,藉此具有良好之柔軟性及耐寒彎曲性,並且亦發揮優異之硬化性。例如推測藉由聚醚多元醇(A)發揮良好之柔軟性與耐寒彎曲性,藉由僅包含源自癸二酸之結構之聚酯多元醇(C)發揮硬化性,進而藉由包含源自間苯二甲酸之結構及源自癸二酸之結構之聚酯多元醇(B)取得聚醚多元醇(A)及聚酯多元醇(C)之效果之平衡性,並主要發揮本發明之效果。
又,藉由使多異氰酸酯、多元醇之構成及量等進而最佳化,可更良
好地發揮該效果。
作為多元醇,包含聚醚多元醇(A)30質量%以上、包含源自間苯二甲酸之結構及源自癸二酸之結構作為源自二元酸之部分結構的聚酯多元醇(B)30質量%以上、僅包含源自癸二酸之結構作為源自二元酸之部分結構之聚酯多元醇(C)20質量%以下。
如上所述,多元醇中之聚醚多元醇(A)設為30質量%以上。若聚醚多元醇(A)未達30質量%,則存在無法獲得良好之耐寒彎曲性之情形。聚醚多元醇(A)較佳為35~80質量%,更佳為40~70質量%。
作為聚醚多元醇(A),例如可列舉:聚氧四亞甲基二醇(PTMG)、聚氧丙二醇(PPG)、聚氧乙二醇(PEG)、EO/PO(Ethylene Oxide/Propylene Oxide,環氧乙烷/環氧丙烷)共聚物、EO/THF((Ethylene Oxide/Tetrahydrofuran,環氧乙烷/四氫呋喃))共聚物等。就良好之耐寒彎曲性與柔軟性之觀點而言,較佳為聚氧四亞甲基二醇(PTMG)。
就良好之耐寒彎曲性之觀點而言,聚醚多元醇(A)之數量平均分子量為1100~2400,較佳為1150~2300,更佳為1200~2200。
聚醚多元醇(A)較佳為以30:70~70:30之質量比包含數量平均分子量700~1300之聚醚多元醇(A-1)與數量平均分子量2700~3300之聚醚多元醇(A-2),更佳為以40:60~60:40之質量比包含數量平
均分子量700~1300之聚醚多元醇(A-1)與數量平均分子量2700~3300之聚醚多元醇(A-2)。藉由以30:70~70:30之質量比包含數量平均分子量700~1300之聚醚多元醇(A-1)與數量平均分子量2700~3300之聚醚多元醇(A-2),聚醚多元醇(A)之分子量分佈變寬,而容易獲得良好之耐寒彎曲性。
如上所述,多元醇中之聚酯多元醇(B)設為30質量%以上。若聚酯多元醇(B)未達30質量%,則難以同時實現良好之耐寒彎曲性與硬化性。聚酯多元醇(B)較佳為30~60質量%,更佳為30~50質量%。
聚酯多元醇(B)之作為源自二元酸之部分結構之源自間苯二甲酸之結構及源自癸二酸之結構中源自間苯二甲酸之結構(間苯二甲酸殘基)主要有助於柔軟性與硬化性,源自癸二酸之結構(癸二酸殘基)有助於優異之硬化性。即,認為該等結構與聚醚多元醇(A)及聚酯多元醇(C)協同作用而使耐寒彎曲性與柔軟性更良好,亦更有效地表現出優異之硬化性。
就更良好之耐寒彎曲性之觀點而言,形成源自二元酸之部分結構之源自間苯二甲酸之結構及源自癸二酸之結構較佳為該等之莫耳比(源自間苯二甲酸之結構/源自癸二酸之結構)為30/70~70/30,更佳為45/65~65/45。
聚酯多元醇(B)之酸成分且形成源自二元酸之部分結構之源自間苯二甲酸之結構及源自癸二酸之結構之合計量較佳為50莫耳%以上,更佳為70莫耳%以上。藉由為70莫耳%以上,可製成具有韌性之構成
體。再者,作為形成源自二元酸之部分結構之源自間苯二甲酸之結構及源自癸二酸之結構以外之形成源自二元酸之部分結構之酸成分,可列舉:對苯二甲酸、丙二酸、戊二酸、庚二酸、辛二酸、琥珀酸、己二酸、壬二酸、十二烷二酸等二元酸。
作為構成聚酯多元醇(B)之醇成分,可列舉:乙二醇、二乙二醇、三乙二醇、丙二醇、1、2-丙二醇、正丙二醇、1,3-丁二醇、1,4-丁二醇、1,5-戊二醇、1,6-己二醇、己二醇、3-甲基-1,5-戊二醇、2-乙基-1,3-己二醇、1,9-壬二醇、新戊二醇等。
聚酯多元醇(B)之分子量以數量平均分子量計較佳為1500~4000,更佳為2000~3500。藉由使數量平均分子量為1500~4000,可具有良好之耐寒彎曲性。聚酯多元醇(B)亦可單獨或將2種以上組合使用。
聚酯多元醇(B)例如可由成為源自苯二甲酸之結構之間苯二甲酸、成為源自癸二酸之結構之癸二酸、上述醇成分等製造。
如上所述,多元醇中之聚酯多元醇(C)設為20質量%以下。若聚酯多元醇(C)超過20質量%,則難以獲得優異之硬化性。另一方面,若不存在聚酯多元醇(C),則不會硬化或者硬化時間變得過長而難以獲得優異之硬化性。就該觀點而言,聚酯多元醇(C)較佳為5~20質量%,更佳為10~15質量%。
僅包含源自癸二酸之結構作為源自二元酸之部分結構之聚酯多元醇(C)藉由其源自癸二酸之結構,而主要有助於表現出優異之硬化性。
又,作為構成聚酯多元醇(C)之醇成分,可列舉:乙二醇、二乙二醇、三乙二醇、丙二醇、1、2-丙二醇、正丙二醇、1,3-丁二醇、1,4-丁二醇、1,5-戊二醇、1,6-己二醇、己二醇、3-甲基-1,5-戊二醇、2-乙基-1,3-己二醇、1,9-壬二醇、新戊二醇等。
聚酯多元醇(C)之數量平均分子量較佳為2000~6000,更佳為3000~5000。藉由以數量平均分子量計為2000~6000,可表現出優異之硬化性,而獲得良好之加工適應性。
聚酯多元醇(C)例如可由成為源自癸二酸之結構之癸二酸、上述醇成分等製造。
再者,本實施形態之多元醇中聚醚多元醇(A)、聚酯多元醇(B)、聚酯多元醇(C)較佳為合計包含65質量%以上,更佳為包含80質量%以上,進而較佳為100質量%。作為上述合計並非為100質量%之情形時之其他多元醇,可列舉:丙烯酸多元醇、聚烯烴多元醇、聚丁二烯多元醇、聚異戊二烯多元醇、松香改性多元醇、聚乙烯丁烯多元醇、聚碳酸酯多元醇、聚己內酯多元醇等。
用作本實施形態之聚胺酯預聚物之合成成分之多異氰酸酯並無特別限定,較佳為脂肪族二異氰酸酯、脂環族二異氰酸酯、芳香族二異氰酸酯等2官能多異氰酸酯。
作為多異氰酸酯之具體例,為:甲苯二異氰酸酯、4-甲氧基-1,3-伸苯基二異氰酸酯、4-異丙基-1,3-伸苯基二異氰酸酯、4-氯-1,3-伸苯基二異氰酸酯、4-丁氧基-1,3-伸苯基二異氰酸酯、2,4-二異氰酸酯基-二苯基
醚、均三甲苯二異氰酸酯、4,4'-二苯甲烷二異氰酸酯、伸荰基二異氰酸酯、1,5-萘二異氰酸酯、聯苯胺二異氰酸酯、鄰硝基聯苯胺二異氰酸酯、4,4-二異氰酸酯基聯苄、1,4-四亞甲基二異氰酸酯、1,5-五亞甲基二異氰酸酯、1,6-六亞甲基二異氰酸酯、1,10-十亞甲基二異氰酸酯、1,4-環己二異氰酸酯、二甲苯二異氰酸酯、4,4'-亞甲基雙(環己基異氰酸酯)、1,5-四氫萘二異氰酸酯、異佛爾酮二異氰酸酯、二環己甲烷4,4'-二異氰酸酯等。其中,較佳為至少包含4,4'-二苯甲烷二異氰酸酯。
於如車輛用途或淡色系用途等必需耐光性之情形時,較佳為將4,4'-二苯甲烷二異氰酸酯與脂肪族二異氰酸酯或脂環族二異氰酸酯併用。
又,作為多異氰酸酯,係碳數4~10之直鏈型脂肪族二異氰酸酯,較佳為包含10~50莫耳%之該碳數4~10之直鏈型脂肪族二異氰酸酯,更佳為包含20~40莫耳%。藉由包含10~50莫耳%之碳數4~10之直鏈型脂肪族二異氰酸酯,可發揮更良好之硬化性。作為碳數4~10之直鏈型脂肪族二異氰酸酯,較佳為1,5-五亞甲基二異氰酸酯、1,6-六亞甲基二異氰酸酯。
多元醇與多異氰酸酯之比率以多異氰酸酯之異氰酸酯基當量相對於多元醇之羥基當量之比(NCO/OH莫耳比)計設為2.1以下,較佳為1.5~2.1,更佳為1.7~2.0。若NCO/OH超過2.1,則柔軟性及耐寒彎曲性容易降低。
本實施形態之聚胺酯預聚物亦可調配具有官能基數3~5之末端異氰酸酯基之多異氰酸酯交聯劑作為組成成分。就硬化性及與基材之密接性之觀點而言,相對於聚胺酯預聚物100質量份,較佳為含有30質量%以下之該多異氰酸酯交聯劑,更佳為含有2~20質量%。
又,本實施形態之聚胺酯預聚物較佳為軟化點落於30~100℃之範圍內且100℃下之熔融黏度為110dPa‧s以下。軟化點更佳為落於50~80℃之範圍內。又,100℃下之熔融黏度更佳為40~110dPa‧s。藉由使軟化點落於30~100℃之範圍內且使100℃下之熔融黏度為110dPa‧s以下,可具有良好之加工適應性。
本實施形態之聚胺酯預聚物之製造方法並無特別限定。例如可向上述多元醇中以NCO/OH成為2.1以下之方式混合多異氰酸酯,並於80~120℃下反應60~120分鐘左右而製造。
如以上之本實施形態之聚胺酯預聚物除下述接著劑以外,亦可有效地用於塗料、密封材料等。
本實施形態之接著劑含有本發明之聚胺酯預聚物。於本實施形態之接著劑中,可視需要適量調配熱塑性聚合物、黏著賦予樹脂、觸媒、顏料、抗氧化劑、紫外線吸收劑、界面活性劑、阻燃劑、填充劑、發泡劑等,但較佳為由聚胺酯預聚物構成。又,本實施形態之接著劑較佳為合成人造皮用、即合成人造皮用接著劑。
本實施形態之接著劑藉由塗佈於被黏著體表面而可使被黏著體彼此容易地接著。作為被黏著體,除上述合成人造皮用之基材以外,例如亦可列舉金屬、非金屬(聚碳酸酯、玻璃等)之基材。
本實施形態之合成人造皮於表皮層與基材之間具有接著劑層,該接
著劑層係本實施形態之聚胺酯預聚物之硬化物層。
作為基材,可使用先前公知之合成人造皮之基材,例如可列舉:包含斜紋織物、平紋織物等之梭織物、使該梭織物之棉布料機械起毛而獲得之起毛布、嫘縈布、尼龍布、聚酯布、克維拉布、不織布(聚酯、尼龍、各種乳膠)、各種膜、片材等。
作為表皮層,可列舉由溶劑系聚胺酯、水系聚胺酯、TPU(Thermoplastic urethanes,熱塑性聚胺酯彈性體)等表皮層形成用塗料形成者,並無特別限定。
合成人造皮例如可以如下方式製造。首先,利用缺角輪塗佈、刮塗、輥塗、凹版塗佈、棒式塗佈、噴塗等公知之方法將用以形成表皮層之表皮層形成用塗料塗佈於脫模紙上。使其適當乾燥而形成表皮層。利用缺角輪塗佈、刮塗、輥塗等公知之方法將本發明之聚胺酯預聚物或本發明之接著劑塗佈於該表皮層上。其後,與基材壓接。進而,進行熟化等並自脫模紙剝離而獲得本實施形態之合成人造皮。
如以上之本實施形態之合成人造皮適合鞋子、衣料、包、傢俱、車輛內飾材料(例如儀錶面板、門、操作台、座椅片材)等。
繼而,於實施例及比較例中進而詳細地對本發明進行說明。當然,本發明並不受實施例等限定。再者,數量平均分子量係藉由GPC(聚苯乙烯換算)測定。
向賦予有攪拌機、溫度計、氣體導入口等之500ml之玻璃製反應容
器中,以表1所示之特定量(NCO/OH=1.5~2.2)添加聚醚多元醇(A-1)、聚醚多元醇(A-2)、聚醚多元醇(A-3)、包含源自間苯二甲酸之結構及源自癸二酸之結構作為源自二元酸之部分結構的聚酯多元醇(B)、僅包含源自癸二酸之結構作為源自二元酸之部分結構之聚酯多元醇(C)、及多異氰酸酯,加熱減壓而進行脫水處理後,封入氮氣使內溫為120℃,並進行90分鐘攪拌反應,獲得聚胺酯預聚物PU1~15。
實施例及比較例中所使用之多元醇及多異氰酸酯如下所述。
(1)聚醚多元醇(A-1):polyTHF1000(BASF製造,數量平均分子量1000之聚氧四亞甲基二醇)
(2)聚醚多元醇(A-2):polyTHF3000(BASF製造,數量平均分子量3000之聚氧四亞甲基二醇)
(3)聚醚多元醇(A-3):polyTHF1500(BASF製造,數量平均分子量1500之聚氧四亞甲基二醇)
(4)聚酯多元醇(B):HS2F-305S(豐國製油製造,數量平均分子量3100
(5)聚酯多元醇(C):HS2H-500S(豐國製油製造,數量平均分子量5000)
(6)多異氰酸酯:4,4'-二苯甲烷二異氰酸酯(MDI)
向賦予有攪拌機、溫度計、氣體導入口等之500ml之玻璃製反應容器中,以表2所示之特定量(NCO/OH=1.9)添加聚醚多元醇(A-1)、聚醚多
元醇(A-2)、包含源自間苯二甲酸之結構及源自癸二酸之結構作為源自二元酸之部分結構的聚酯多元醇(B)、僅包含源自癸二酸之結構作為源自二元酸之部分結構之聚酯多元醇(C)、表2所示之各種多異氰酸酯,加熱減壓而進行脫水處理後,封入氮氣使內溫為100℃,並進行120分鐘攪拌反應,獲得聚胺酯預聚物PU16~21。
表2所示之多異氰酸酯如下所述。
(7)MDI:4,4'-二苯甲烷二異氰酸酯
(8)1,5-PDI:1,5-五亞甲基二異氰酸酯(生質比率重量比70%者)
(9)1,6-HDI:1,6-六亞甲基二異氰酸酯
(10)IPDI:異佛爾酮二異氰酸酯
(11)XDI:間二甲苯二異氰酸酯
使用BM型黏度計(東京計器製造所),於轉子No.4/30rpm/100℃之條件下測定聚胺酯預聚物PU1~21之熔融黏度。評價指標設為如下所述。將結果示於表1及表2。
◎:70~90dPa‧s
○:50~69dPa‧s或91~110dPa‧s
△:40~49dPa‧s或110~120dPa‧s
×:上述範圍外
依據基於「ASTM D 4359-90:Standard Test Method for
Determining Whether a Material is a Liquid or Solid」之固體-液體判定試驗,測定聚胺酯預聚物PU1~21之軟化點。將結果示於表1及表2。
將作為合成人造皮表皮用之溶劑型聚胺酯樹脂即RESAMI NE-8875-30(大日精化工業(股)製造)、作為合成人造皮用著色劑之Seika Seven BS-780(大日精化工業(股)製造)、及作為稀釋溶劑之甲基乙基酮(MEK)及二甲基甲醯胺(DMF)進行混合,利用棒式塗佈機將250μm/wet之塗佈量均勻地塗佈於脫模紙上後,於120℃下乾燥5分鐘,獲得膜厚40~50μm之表皮層。
於形成於上述脫模紙上之表皮層,以形成厚度100μm之接著劑層之方式塗佈以RESAMINE UD-8351NT(聚胺酯樹脂接著劑,大日精化工業(股)製造)100質量份、C-50交聯劑(異氰酸酯系交聯劑,大日精化工業(股)製造)10質量份之組成製備之接著劑,於80℃/2分鐘之預乾燥後,於層壓輥溫度40℃下對所獲得之接著層與基材(梭織物)進行加壓壓接。其後,於50℃/48小時之條件進行熟化,獲得用於柔軟性評價之標準合成人造皮。
於形成於上述脫模紙上之表皮層,以塗佈膜厚成為100μm之方式塗佈加熱至100℃之聚胺酯預聚物PU1~21,於層壓輥溫度100℃下對基布
(梭織物)進行加壓壓接。作為熟化步驟,於溫度25℃、相對濕度65%之環境下熟化5天。自脫模紙剝離,製作使用聚胺酯預聚物PU1~21之評價用合成人造皮。
關於所獲得之各合成人造皮之柔軟性,以標準合成人造皮為基準,以手指觸摸之觸感進行比較,評價指標設為如下所述。再者,若評價為△、○、◎,則合格。
◎:比標準合成人造皮柔軟
○:與標準合成人造皮相同程度地柔軟
△:略硬於標準合成人造皮
×:遠硬於標準合成人造皮
將上述所獲得之各合成人造皮製成寬50mm、長150mm(評價範圍100mm)之試驗片材,使用該試驗片材並藉由DE MATTIA試驗機(安田精機製作所製造,型號:NO.119-L DE MATTIA FLEXING TESTER),於-10℃環境下,於伸縮彎曲範圍72~108%、-10℃低溫下進行彎曲試驗。評價指標設為如下所述。再者,若評價為△、○、◎,則合格。
◎:40000次後仍未破裂
○:30000次後未破裂,達到40000次時存在破裂
△:10000次後未破裂,達到30000次時存在破裂
×:10000次後存在破裂
接著劑之硬化性評價設為將聚胺酯預聚物PU1~21塗佈於表皮層上後,以手指觸摸塗膜表面,直至喪失黏性為止之時間。硬化時間若為3~24分鐘之範圍,則合格,其中,若為7~18分鐘之範圍,則良好,若為9~12分鐘之範圍,則可謂進而良好之結果。
Claims (10)
- 一種聚胺酯預聚物,其係使多元醇與多異氰酸酯反應而獲得者,上述多元醇包含:聚醚多元醇(A)30質量%以上、包含源自間苯二甲酸之結構及源自癸二酸之結構作為源自二元酸之部分結構的聚酯多元醇(B)30質量%以上、及僅包含源自癸二酸之結構作為源自二元酸之部分結構之聚酯多元醇(C)20質量%以下,上述聚醚多元醇(A)之數量平均分子量為1100~2400,且上述多異氰酸酯之異氰酸酯基當量相對於上述多元醇之羥基當量之比為2.1以下。
- 如請求項1之聚胺酯預聚物,其中上述多異氰酸酯包含4,4'-二苯甲烷二異氰酸酯。
- 如請求項1或2之聚胺酯預聚物,其中上述多異氰酸酯成分之異氰酸酯基當量相對於上述多元醇之羥基當量之比為1.5~2.1。
- 如請求項1或2之聚胺酯預聚物,其中上述多異氰酸酯係碳數4~10之直鏈型脂肪族二異氰酸酯,且該聚胺酯預聚物包含10~50莫耳%之上述碳數4~10之直鏈型脂肪族二異氰酸酯。
- 如請求項1或2之聚胺酯預聚物,其中上述聚醚多元醇(A)以30:70~70:30之質量比包含數量平均分子量700~1300之聚醚多元醇(A-1)與數 量平均分子量2700~3300之聚醚多元醇(A-2)。
- 如請求項1或2之聚胺酯預聚物,其軟化點落於30~100℃之範圍內,且100℃下之熔融黏度為110dPa‧s以下。
- 如請求項1或2之聚胺酯預聚物,其含有相對於上述聚胺酯預聚物100質量份為30質量份以下之具有官能基數3~5之末端異氰酸酯基之多異氰酸酯交聯劑。
- 一種接著劑,其含有如請求項1至7中任一項之聚胺酯預聚物。
- 如請求項8之接著劑,其用於合成人造皮。
- 一種合成人造皮,其於表皮層與基材之間具有接著劑層,且上述接著劑層係如請求項1至7中任一項之聚胺酯預聚物之硬化物層。
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