TWI780043B - 具有光致變色特性的合成樹脂層合體及使用其之透鏡 - Google Patents
具有光致變色特性的合成樹脂層合體及使用其之透鏡 Download PDFInfo
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- TWI780043B TWI780043B TW106107408A TW106107408A TWI780043B TW I780043 B TWI780043 B TW I780043B TW 106107408 A TW106107408 A TW 106107408A TW 106107408 A TW106107408 A TW 106107408A TW I780043 B TWI780043 B TW I780043B
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Abstract
依據本發明,可提供一種合成樹脂層合體,其特徵為具有以下(A)至(C)者:2個透明合成樹脂層(A),介於該2個透明合成樹脂層(A)間的2個以上具有光致變色特性之功能層(B),介於該2個以上之功能層(B)間的透明樹脂層(C);該功能層(B)為含有光致變色色素,且由二異氰酸酯及多元醇所得之硬化層。
Description
本發明有關可較佳地使用於太陽眼鏡、護目鏡、矯正透鏡等之具有光致變色特性的合成樹脂層合體及使用其之透鏡。
以往之光學透鏡尤其是光致變色透鏡一般使用無機系材料者已普及。亦即,一般係於玻璃、CR-39等之硬化性塑膠表面上使用具有光致變色特性之無機系材料附加塗膜層。最近,作為鏡片本身,具有高耐衝擊性之塑膠透性已普及。尤其,於美國使用聚碳酸酯之透鏡已廣泛普及,且對於適用於戶外活性之具有耐衝擊性之太陽眼鏡之需求急速增加。
以往,作為具有光致變色性之合成樹脂層合體,已知有於聚矽氧系表面硬化塗料中添加光致變色有機化合物並塗佈於層合體之單面,使之硬化者,或於胺基甲酸酯系塗料中添加光色變色色素並塗佈於層合體之單面,使之硬化者(專利文獻1)。
然而,於合成樹脂層合體之單面塗布含有光
致變色色素之塗料的方法,增加了對各個層合體進行塗裝之步驟,因塗裝成分中之溶劑而產生龜裂,成為外觀不良,且亦難以將塗裝部分僅限定於期望部分,於製品設計方面有其限制。
再者,雖嘗試進行對合成樹脂直接混練之方法,但混練時因光致變色色素之耐熱性不足故產生色素分解、劣化,而有光致變色特性之展現不足,或引起合成樹脂層合體本身之物性降低之問題。
又,於專利文獻2中,揭示作成以添加有光致變色色素之聚胺基甲酸酯樹脂接著2個透明樹脂之具有光致變色特性之合成樹脂層合體之方法。且專利文獻3中,揭示將具有光致變色特性之樹脂層塗佈或轉印於透明塑膠薄片上,對前述樹脂層射出成形支撐樹脂而透鏡化之方法。然而,該等先前技術,因光致變色色素之低溶解性問題,為了獲得充分之對比性而增大具有光致變色特性之聚胺基甲酸酯樹脂層厚度,難以控制為平滑且厚度均一。厚度不均一性由於直接於顯色時展現為濃淡不均,故實用上欠佳。再者,亦有易於產生層間剝離,因聚胺基甲酸酯樹脂之硬化收縮而於合成樹脂層合體發生翹曲之問題。
作為此種光致變色透鏡,現狀係尚無法獲得顯色良好、具有光致變色特性之層的塗膜之表面平滑性及塗膜厚度之控制優異之具有光致變色特性之透明合成樹脂層合體。
[專利文獻1]日本特開昭63-178193號公報
[專利文獻2]日本專利第4586953號公報
[專利文獻3]日本專利第5559497號公報
本發明係為了解決伴隨如上述先前技術之問題點者,本發明之目的在於提供顯色之對比性良好、且無面內之顯色不均、具有光致變色特性之層的塗膜表面之平滑性及塗膜厚度之控制優異之具有光致變色特性之透明合成樹脂層合體。
本發明人鑑於該等情況,檢討上述先前問題點之結果,發現藉由以下之本發明可解決上述課題,因而完成本發明。
亦即,本發明係如以下者。
<1>一種合成樹脂層合體,其特徵為具有以下(A)至(C)者:2個透明合成樹脂層(A),介於該2個透明合成樹脂層(A)間的2個以上具有光致變色特性之功能層(B),介於該2個以上之功能層(B)間的透明樹脂層(C);該功能層(B)為含有光致變色色素,且由二異氰酸酯及多元醇所得之硬化
層。
<2>如上述<1>之合成樹脂層合體,其中於前述功能層(B)的一方及於與前述樹脂層(C)為反側存在的前述合成樹脂層(A)的一方之間,由前述功能層(B)側依序地具有持偏光特性的樹脂層(D)與接著材層(E)。
<3>如上述<1>或<2>之合成樹脂層合體,其中前述樹脂層(C)具有偏光特性。
<4>如上述<1>至<3>中任一項之合成樹脂層合體,其中介於前述2個透明合成樹脂層(A)間的所有功能層(B)之厚度合計為30μm以上,且各該功能層(B)之厚度為25μm以下。
<5>如上述<1>至<4>中任一項之合成樹脂層合體,其中前述透明合成樹脂層(A)的至少一方為含有選自由芳香族聚碳酸酯、聚(甲基)丙烯酸酯、乙醯纖維素、聚醯胺、及芳香族聚碳酸酯與脂環式聚酯的混合物所成群的1個之單層,或者這些之2個以上經層合為一體化而成之多層。
<6>如上述<5>之合成樹脂層合體,其中前述透明樹脂層(A)的雙方為含有芳香族聚碳酸酯之單層。
<7>如上述<1>至<6>中任一項之合成樹脂層合體,其中介於前述功能層(B)間的前述透明樹脂層(C)為含有選自由芳香族聚碳酸酯、聚(甲基)丙烯酸酯、乙醯纖維素、聚醯胺、聚酯、及芳香族聚碳酸酯與脂環式聚酯的混合物所成群的1個以上。
<8>如上述<7>之合成樹脂層合體,其中介於前述功
能層(B)間的前述透明樹脂層(C)為含有三乙醯纖維素。
<9>一種透鏡,其特徵為如上述<1>至<8>中任一項之合成樹脂層合體經彎曲加工成為球面或者非球面而成之透鏡。
<10>一種透鏡,其特徵為如上述<1>至<8>中任一項之合成樹脂層合體經彎曲加工後成為於凹面側具有透明樹脂的一體射出成形體者。
<11>一種眼部用品(eyewear),其特徵為使用如上述<9>或<10>之透鏡。
藉由本發明,可提供顯色之對比性良好、且無面內之顯色不均、具有光致變色特性之層的塗膜厚度之控制優異之具有光致變色特性之透明合成樹脂層合體及使用該合成樹脂層合體之光致變色透鏡。
A‧‧‧透明合成樹脂層(A)
B‧‧‧具有光致變色特性之功能層(B)
C‧‧‧透明樹脂層(C)
D‧‧‧具有偏光特性之樹脂層(D)
E‧‧‧接著材層(E)
圖1係顯示本發明之合成樹脂層合體之一實施形態個概略剖面圖。
圖2係顯示本發明之合成樹脂層合體之另一實施形態個概略剖面圖。
以下詳述說明本發明。
本發明之合成樹脂層合體之一實施形態個概略剖面圖示於圖1。圖1中記載之合成樹脂層合體具有2個透明合成樹脂層(A),介於該2個透明合成樹脂層(A)間的2個具有光致變色特性之功能層(B),介於該2個之功能層(B)間的透明樹脂層(C)。
其次,本發明之合成樹脂層合體之另一實施形態個概略剖面圖示於圖2。圖2中記載之合成樹脂層合體相對於圖1中記載之合成樹脂層合體,於2個具有光致變色特性之功能層(B)的一方及於與透明樹脂層(C)為反側存在的前述合成樹脂層(A)的一方之間,由前述功能層(B)側依序地具有持偏光特性的樹脂層(D)與接著材層(E)。
本發明之合成樹脂層合體絕非限定於圖1及圖2所示之實施形態。
作為本發明之透明合成樹脂層(A)所用之樹脂可選自由例如芳香族聚碳酸酯、聚(甲基)丙烯酸酯、乙醯纖維素、聚醯胺、及芳香族聚碳酸酯與脂環式聚酯的混合物所成群。本發明中雖使用2個透明合成樹脂層(A),但各可含有相同樹脂成分,亦可含有不同樹脂成分。基於合成樹脂層合體之翹曲、彎曲加工性之觀點,2個透明合成樹脂層(A)較佳含有相同樹脂成分。且本發明之透明合成樹脂層(A)可為含有選自由芳香族聚碳酸酯、聚(甲基)丙烯酸酯、乙醯纖維素、聚醯胺、及芳香族聚碳酸酯與脂環式聚酯的混合物所成群的1個之單層,或者亦可為這些之2
個以上經層合為一體化而成之多層。
上述樹脂成分中,較佳為芳香族聚碳酸酯,更好本發明中之透明樹脂層(A)的雙方為含有芳香族聚碳酸酯之單層。
其中,更好為芳香族二羥基化合物或其與少量之多羥基化合物藉由與光器或碳酸之二酯反應而作成之可具有分支之熱塑性聚碳酸酯聚合物。所謂芳香族二羥基化合物係以下述通式(a)或通式(b)表示之化合物。
上述通式(a)中,X係如以下。
此處,R1與R2為氫原子或碳數1~10之烷基或鹵基,R1與R2可相同亦可不同。且,m及n係表示取代基數之0~4之整數。R3及R4分別獨立為氫原子或碳數1~10之烷基或苯基,R3與R4亦可結合形成環。
上述通式(a)或通式(b)表示之芳香族二羥基化合物舉例為例如雙(4-羥基苯基)甲烷、1,1-雙(4-羥基苯基)乙烷、2,2-雙(4-羥基苯基)丙烷、2,2-雙(4-羥基苯基)丁烷、2,2-雙(4-羥基苯基)辛烷、雙(4-羥基苯基)苯基甲烷、2,2-雙(4-羥基-3-甲基苯基)丙烷、1,1-雙(4-羥基-3-tert-丁基苯基)丙烷、2,2-雙(4-羥基-3-溴苯基)丙烷、1,1-雙(4-羥基苯基)環戊烷、1,1-雙(4-羥基苯基)環己烷、4,4’-二羥基二苯基醚、4,4’-二羥基-3,3’-二甲基苯基醚、4,4’-二羥基苯基硫醚、4,4’-二羥基-3,3’-二甲基二苯基硫醚、4,4’-二羥基二苯基亞碸、4,4’-二羥基-3,3’-二甲基二苯基亞碸、4,4’-二羥基二苯基碸、4,4’-二羥基二苯基碸、4,4’-二羥基-3,3’-二甲基二苯基碸等。該等中,基於強度、耐熱性、耐久性或彎曲加工性之方面,特佳為2,2’-雙(4-羥基苯基)丙烷(雙酚A:BPA)。且通式(a)表示之芳香族二羥基化合物亦可併用2種以上。
本發明之透明合成樹脂層(A)中,亦可添加其他成分,作為其他成分並未特別限定,可根據目的適當選
擇。例如抗氧化劑、脫模劑、紫外線吸收劑、流動性改質計、結晶核劑、強化劑、染料、抗靜電劑、抗菌劑等。該等可單獨使用1種,亦可併用2種以上。本發明之透明合成樹脂層(A)可藉由射出成形、壓縮成形、擠出成形、澆鑄成形等製造。本發明之透明合成樹脂層(A)之厚度較佳為50μm至1.5mm,更好為100μm至800μm。
如上述,上述樹脂層(A)可以單層使用例示之上述樹脂,亦可做為將2種以上之不同樹脂層合一體化之多層薄片或薄膜使用。作為層合方法並未特別限定,共擠出成形法由於可密著性良好地層合故較佳。較佳使用基於耐熱性、耐衝擊性之觀點之由芳香族聚碳酸酯樹脂所成之層與基於耐擦傷性之觀點之由聚(甲基)丙烯酸酯所成之層一體化之多層薄片或薄膜。該情況下,較佳以由聚(甲基)丙烯酸酯所成之層係位於合成樹脂層合體之表面側,由芳香族聚碳酸酯樹脂所成之層係位於功能層(B)側之方式,對於功能層(B)配置樹脂層(A)。
本發明之合成樹脂層合體具有介於該2個合成樹脂層(A)間的2個以上具有光致變色特性之功能層(B),該功能層(B)為含有光致變色色素,且由二異氰酸酯及多元醇所得之硬化層。此種功能層(B)可藉由例如聚胺基甲酸酯預聚物、硬化劑及光致變色色素(根據需要之光安定劑或抗氧化劑)之混合物硬化而形成。
本發明中,具有2個以上具有光致變色特性之功能層(B)係特徵之一。藉由此種構成,可解決先前技術之問題
點,亦即可解決因光致變色色素之低溶解度,為了獲得充分之對比性而增大具有光致變色特性之聚胺基甲酸酯樹脂層厚度,而難以控制為平滑且厚度均一的問題點。
本發明中之具有光致變色特性之功能層(B)較佳為2個或3個,更好為2個。
本發明中之具有光致變色特性之功能層(B)較佳含有含光致變色色素之胺基甲酸酯系樹脂。各個功能層(B)之厚度基於密著性、強度及厚度精度之觀點,較佳為5μm至25μm,更加為10μm至20μm。較佳介於前述2個透明合成樹脂層(A)間的所有功能層(B)之厚度合計為30μm以上,更好為35μm至50μm。
作為前述胺基甲酸酯樹脂,較佳使用二異氰酸酯與多元醇以一定比例反應之聚胺基甲酸酯預聚物。亦即,為自二異氰酸酯與多元醇所得之兩末端具有異氰酸酯基之化合物。作為二異氰酸酯化合物較佳為二苯基甲烷-4,4’-二異氰酸酯(MDI)。且作為多元醇,較佳使用具有5~30之聚合度的聚丙二醇(PPG)。聚胺基甲酸酯預聚物之數平均分子量較好為500~5000,更好為1500~4000,特佳為2000~3000。
另一方面,作為前述硬化劑,若為具有2個以上羥基之化合物則未特別限制,可例示聚胺基甲酸酯多元醇、聚醚多元醇、聚酯多元醇、丙烯酸多元醇、聚丁二烯多元醇、聚碳酸酯多元醇等,其中較佳為自特定之異氰酸酯與特定多元醇所得之末端具有羥基之聚胺基甲酸酯多
元醇。尤其,較佳為自二異氰酸酯與多元醇衍生之至少於兩末端具有羥基之聚胺基甲酸酯多元醇,作為該二異氰酸酯較佳使用甲苯二異氰酸酯(TDI)。且作為多元醇較佳使用聚合度為5~30之聚丙二醇(PPG)。該硬化劑之數平均分子量較好為500~5000,更好為1500~4000,特佳為2000~3000。該等聚胺基甲酸酯預聚物及硬化劑中,為了調節黏度,亦可添加乙酸乙酯、四氫呋喃及甲苯等之溶劑。
本發明所用之光致變色色素若為與胺基甲酸酯系樹脂具有相溶性則未特別限制,較佳為螺吡喃系化合物、螺噁嗪系化合物及萘并吡喃系化合物。該功能層(B)中亦可添加各種添加劑例如UV吸收劑、抗氧化劑、消泡劑等。為了確保本發明之光致變色色素之壽命,較佳添加各種安定劑。作為該安定劑可舉例例如受阻胺系之光安定劑或受阻酚等之抗氧化劑。
作為前述受阻胺系光安定劑舉例為例如雙(2,2,6,6-四甲基-4-哌啶基)癸二酸酯、雙(1,2,2,6,6-五甲基-4-哌啶基)癸二酸酯、雙(1,2,2,6,6-五甲基-4-哌啶基)-2-(3,5-二-第三丁基-4-羥基苄基)-2-正丁基丙二酸酯、1-甲基-8-(1,2,2,6,6-五甲基-4-哌啶基)癸二酸酯、1-[2-[3-(3,5-二-第三丁基-4-羥基苯基)丙醯氧基]乙基]-4-[3-(3,5-二-第三丁基-4-羥基苯基)丙醯氧基]-2,2,6,6-四甲基哌啶、4-苯甲醯氧基-2,2,6,6-四甲基哌啶、肆(2,2,6,6-四甲基-4-哌啶基)-1,2,3,4-丁烷四羧酸酯、三乙二胺、8-乙醯基-3-十二烷
基-7,7,9,9-四甲基-1,3,8-三氮雜雙環[4,5]癸烷-2,4-二醇等。此外,作為鎳系紫外線安定劑亦可使用[2,2’-硫基雙(4-第三辛基酚酸酯)]-2-乙基己基胺鎳、鎳錯合-3,5-二-第三丁基-4-羥基苄基.磷酸單乙醇鹽、鎳.二丁基-二硫代胺基甲酸酯等。尤其作為受阻胺系之光安定劑較佳為僅含有3級胺之受阻胺系之光安定劑,具體為雙(1,2,2,6,6-五甲基-4-哌啶基)癸二酸酯、雙(1,2,2,6,6-五甲基-4-哌啶基)-2-(3,5-二-第三丁基-4-羥基苄基)-2-正丁基丙二酸酯、或1,2,2,6,6-五甲基-4-哌啶基/十三烷醇與1,2,3,4-丁烷四羧酸之縮合物。
作為前述抗氧化劑可使用各種受阻酚等之抗氧化劑,其中較佳使用酚系抗氧化劑、硫醇系抗氧化劑及亞磷酸酯系抗氧化劑。
作為前述酚系抗氧化劑舉例為例如1,1,3-三(2-甲基-4-羥基-5-第三丁基苯基)丁烷、2,2’-亞甲基雙(4-乙基-6-第三丁基酚)、肆-[亞甲基-3-(3’,5’-二-第三丁基-4’-羥基苯基)丙酸酯]甲烷、2,6-二-第三丁基-對-甲酚、4,4’-硫基雙(3-甲基-6-第三丁基酚)、4,4’-亞丁基雙(3-甲基-6-第三丁基酚)、1,3,5-參(3’,5’-二-第三丁基-4’-羥基苄基)-S-三嗪-2,4,6-(1H,3H,5H)三酮、硬脂基-β-(3,5-二-第三丁基-4-羥基苯基)丙酸酯、三乙二醇雙[3-(3-第三丁基-5-甲基-4-(13)羥基苯基)丙酸酯]、3,9-雙[1,1-二甲基-2-[β-(3-第三丁基-4-羥基-5-甲基苯基)丙醯氧基]乙基]-2,4,8,10-四氧雜螺[5,5]十一碳烷、1,3,5-三甲基-2,4,6-三(3,5-二-第三
丁基-4-羥基苄基)苯等。尤其作為酚系抗氧化劑,較佳為分子量550以上者。
本發明之合成樹脂層合體具有介於該2個以上之具有光致變色特性之功能層(B)間的透明樹脂層(C)。該透明樹脂層(C)於具有光致變色特性之功能層(B)之數為3個以上時,亦可為2個以上。
作為本發明之透明樹脂層(C)所用之樹脂可選自由例如芳香族聚碳酸酯、聚(甲基)丙烯酸酯、乙醯纖維素、聚醯胺、聚酯、及芳香族聚碳酸酯與脂環式聚酯的混合物所成群。上述樹脂中,基於透明性、低雙折射率、耐溶劑性之觀點,較佳為乙醯纖維素。作為乙醯纖維素舉例為三乙醯纖維素(TAC)、二乙醯纖維素等,其中較佳為三乙醯纖維素(TAC)。本發明之透明樹脂層(C)厚度較佳為10μm至300μm,更好為30μm至100μm。
本發明之透明樹脂層(C)中,在不損及其物性之範圍內亦可根據目的,添加各種習知添加劑。可添加例如熱安定劑、水解安定劑、抗氧化劑、顏料、染料、強化劑、填充劑、紫外線吸收劑、滑劑、脫模劑、結晶核劑、可塑劑、流動性改良劑、抗靜電劑、抗菌劑等。
本發明之透明樹脂層(C)亦可為具有偏光特性者。
本發明中,較佳於前述功能層(B)的一方及於與前述樹脂層(C)為反側存在的前述合成樹脂層(A)的一方之間,由前述功能層(B)側依序地具有持偏光特性的樹脂層(D)與接著材層(E)。
前述具有偏光特性之樹脂層(D),較佳使用以二色性有機染料對聚乙烯醇系樹脂之薄膜進行染色及延伸而製造者。作為該聚乙烯醇類例示有聚乙烯醇(PVA)、微量殘留PVA之乙酸酯構造者及PVA衍生物或類似物的聚乙烯縮甲醛、聚乙烯縮乙醛、乙烯-乙酸乙烯酯共聚物皂化物等,尤佳為PVA。該聚乙烯醇系樹脂之薄膜於一方向延伸並含浸或吸附2色性有機染料,經適當固定、乾燥成為偏光性薄膜。
PVA之重量平均分子量較佳為50,000~350,000,更佳為150,000~300,000。延伸前之PVA薄膜厚度通常為100~300μm左右,延伸後之PVA偏光薄膜較佳為10~50μm左右。
PVA薄膜之延伸倍率較佳為2~8倍,雖根據目的適當選擇,但基於延伸後之強度之觀點,更佳為3~6倍。
作為前述接著材層(E)若為通常之使PC薄膜與偏光薄膜貼合所用之接著劑則可使用任何構成,但前述具有光致變色特性之功能層(B)中使用之聚胺基甲酸酯數之可較好地使用作為接著劑。尤其考慮後加工時,較佳使用由聚胺基甲酸酯預聚物與硬化劑所成之2液型聚胺基甲酸酯。前述接著材層(E)之厚度較佳為5~100μm之範圍,更加為5~50μm之範圍。厚度未達5μm時,有不易獲得充分接著力之情況。且,超過100μm時接著力雖充分,但使接著材層之溶劑揮發耗費時間,而有生產性或經濟性變差之情況。於該接著劑層中添加UV吸收劑亦可使層合體
具有UV截斷功能。
以下說明本發明之透鏡之製造方法。將本發明之合成樹脂層合體藉由沖壓成各個透鏡用之形狀予以加工後,藉由施以彎曲加工為球面或非球面而可製作透鏡。作為射出透鏡使用時,將本發明之合成樹脂層合體進行彎曲加工後插入模具內,於凹面側一體射出成形透明樹脂可製作透鏡。作為該透明樹脂舉例為芳香族聚碳酸酯、非晶性聚烯烴(脂環式聚烯烴)、聚丙烯酸酯、聚碸、乙醯纖維素、聚苯乙烯、聚酯、透明聚醯胺、及芳香族聚碳酸酯與脂環式聚酯脂組成物,或該等之混合物等。於要求耐衝擊性或耐熱性之太陽眼鏡或護目鏡中,較佳為芳香族聚碳酸酯。其中更佳為雙酚A型聚碳酸酯。
其次,可對本發明之透鏡實施硬塗層處理。已知樹脂表面與玻璃相比,較易損傷,於太陽眼鏡或護目鏡中,為了提高耐擦傷性,強烈要求於其表面層合硬塗層。硬塗層之材質或加工條件,可自耐擦傷性、外觀、對於本發明透鏡之密著性、或者對接續塗佈之鏡面塗層或抗反射塗層等之無機層之密著性優異者之中適當選擇。作為塗佈方法可藉浸漬法、噴霧法、輥塗佈法、旋轉塗佈法等習知方法於基材上塗佈硬塗覆液,並乾燥,根據需要予以加熱,可形成被膜層。硬塗覆液可藉由將硬塗覆組成物溶解或分散於溶劑中,進而根據需要藉由稀釋溶劑稀釋而製作。稀釋溶劑可舉例醇類、溶纖素類、酮類、酯類、醚類等。
其次,藉由磨邊、開孔、螺栓固定等固定於框上作成眼部用品(eyewear)(太陽眼鏡或護目鏡等)。
以下說明本發明之實施例,但本發明絕非限定於以下實施例者。
對於聚胺基甲酸酯聚合物50重量份,使用硬化劑5重量份、使用乙酸乙酯65重量份作為溶劑,調製樹脂液。前述聚胺基甲酸酯聚合物之NCO基當量重量(所謂當量重量係每1個官能基之平均分子量)為1500之聚胺基甲酸酯聚合物(由二苯基甲烷-4,4’-二異氰酸酯(MDI)與平均聚合度15之聚丙二醇(PPG)調製者)。且前述硬化劑為羥基當量重量為1050之硬化劑(由甲苯二異氰酸酯與平均聚合度為10之聚丙二醇調製者)。前述樹脂液中均一混合Vivimed公司之「Ruby」0.2重量份作為光致變色色素,作成含有光致變色色素之樹脂液。
將聚乙烯醇(KURARAY股份有限公司製,商品名:VF-PS#7500)於35℃水中膨潤270秒並延伸為2倍。
接著,於含KAYARAS SPLINE BLUE BWL、SUMILITE RED 4B、SUMILITE SPLINE ORANGE 2GL及
10g/L無水硫酸鈉之35℃水溶液中染色,並延伸為3倍。
該染色薄膜於含乙酸鎳2.3g/L及硼酸4.4g/L之水溶液中於35℃浸漬120秒,並延伸為4倍。於該薄膜保持緊張狀態之狀態於室溫進行3分鐘乾燥後,於110℃加熱處理3分鐘,獲得透過率30%、偏光度99%之偏光薄膜。
於恆溫槽23℃下,使用太陽模擬器HAL-320(朝日分光製)照射強度50000Lux之疑似太陽光。藉由分光光度計MCPD-7700(大塚電子製)測定照射開始15分鐘後之透過率(T1)。同樣測定無照射時之透過率(T2),評價以下述(式1)表示之對比度。此處所稱之透過率係以JIS Z-8701規範之使用C光源於2度視野中之視感透過率。
對比度=T2/T1 (式1)
使用UV面照射裝置LMH133F(I-TECH SYSTEM製)對合成樹脂層合體照射紫外光,目視判斷光致變色色素顯色之狀態。
將以上述(1)之方法獲得之含光致變色色素之樹脂液(功能層(B)用)以棒塗佈器#42塗佈於樹脂層(C)的厚40μm
之三乙醯纖維素(TAC)薄膜(富士薄膜公司製)上。隨後,於70℃之環境下使溶劑揮發10分鐘,將該樹脂液面與合成樹脂層(A)的厚320μm且Re為5500nm之芳香族聚碳酸酯薄膜(三菱工程塑膠公司製,商品名YUPILON E-2000(以下同))貼合。
於所得層合體之TAC薄膜(樹脂層(C))面上,同樣塗佈以上述(1)之方法獲得之含光致變色色素之樹脂液(功能層(B)用),將該樹脂液面與合成樹脂層(A)的厚320μm且Re為5500nm之芳香族聚碳酸酯薄膜貼合。
所得合成樹脂層合體於70℃加熱硬化2天。針對如此所得之合成樹脂層合體測定具有光致變色特性之功能層(B)之厚度,進而觀察外觀。下述表1顯示合成樹脂層合體之評價結果。
實施例1中,代替合成樹脂層(A)的芳香族聚碳酸酯薄膜,而使用藉由共擠出法製造之厚50μm之聚(甲基)丙烯酸酯樹脂與厚250μm之芳香族聚碳酸酯樹脂所成之一體層合化之厚300μm之薄膜,以使該芳香族聚碳酸酯樹脂與含光致變色色素之樹脂液貼合之方式層合以外,與實施例1同樣,製作合成樹脂層合體,同樣進行評價。
實施例1中,代替合成樹脂層(A)的芳香族聚碳酸酯
薄膜,而使用聚醯胺薄膜以外,與實施例1同樣,製作合成樹脂層合體,同樣進行評價。
與實施例1同樣,透過具有光致變色特性之功能層(B)使TAC薄膜(樹脂層(C))與芳香族聚碳酸酯薄膜(合成樹脂層(A))貼合(層合體1)。接著將以上述(2)之方法獲得之厚約30μm之偏光薄膜(樹脂層(D))上,使用微凹版塗佈器塗佈於上述(1)之方法中除不使用光致變色色素以外同樣製作之胺基甲酸酯接著劑(接著劑層(E))。接著,於70℃之環境下使溶劑揮發10分鐘,將接著劑層(E)與合成樹脂層(A)的厚320μm且Re為5500nm之芳香族聚碳酸酯薄片貼合(層合體2)。
於層合體2之偏光薄膜(樹脂層(D))面上,同樣塗佈以上述(1)之方法獲得之含光致變色色素之樹脂液(功能層(B)用),並與層合體1之TAC薄膜(樹脂層(C))面貼合。所得之合成樹脂層合體與實施例1同樣熱硬化,同樣進行評價。
以棒塗佈器#36將以上述(1)之方法獲得之含光致變色色素之樹脂液(功能層(B)用)塗佈於厚50μm之TAC薄膜(樹脂層(C))上。隨後於70℃之環境下使溶劑揮發10分鐘,將該樹脂液面與合成樹脂層(A)的厚320μm且Re為
5500nm之芳香族聚碳酸酯薄片貼合。再製作一組同樣者,於單方之層合體之TAC薄膜(樹脂層(C))面上,同樣使用棒塗佈器#24塗佈以上述(1)之方法獲得之含光致變色色素之樹脂液(功能層(B)用),並與另一單方之層合體之TAC薄膜(樹脂層(C))貼合。所得合成樹脂層合體與實施例1同樣熱硬化,同樣進行評價。
實施例1中,代替作為樹脂層(C)之TAC薄膜,而使用厚300μm之芳香族聚碳酸酯薄膜以外,與實施例1同樣,製作合成樹脂層合體,同樣進行評價。
於合成樹脂層(A)的厚320μm且Re為5500nm之芳香族聚碳酸酯薄片上,以間隙150μm之刮刀板塗佈以上述(1)之方法獲得之含光致變色色素之樹脂液(功能層(B)用),於70℃之環境下使溶劑揮發10分鐘,將該樹脂液面與合成樹脂層(A)的厚320μm且Re為5500nm之芳香族聚碳酸酯薄片貼合。該合成樹脂層合體於70℃加熱下經2天硬化。所得合成樹脂層合體之評價與實施例1同樣進行。
比較例1中,除使用棒塗佈器#42塗佈含光致變色色
素之樹脂液(功能層(B)用)以外,與比較例1同樣製作合成樹脂層合體,同樣進行評價。
將以上述(2)之方法獲得之厚約30μm之偏光薄膜(樹脂層(D))上,使用微凹版塗佈器塗佈於上述(1)之方法中除不使用光致變色色素以外同樣製作之胺基甲酸酯接著劑(接著劑層(E))。隨後,於70℃之環境下使溶劑揮發10分鐘,將接著劑層(E)與合成樹脂層(A)的厚320μm且Re為5500nm之芳香族聚碳酸酯薄片貼合。
於所得層合體之偏光薄膜(樹脂層(D))面上,以間隙150μm之刮刀板塗佈以上述(1)之方法獲得之含光致變色色素之樹脂液(功能層(B)用),於70℃之環境下使溶劑揮發10分鐘,將該樹脂液面與合成樹脂層(A)的厚320μm且Re為5500nm之芳香族聚碳酸酯薄片貼合。所得之合成樹脂層合體與實施例1同樣熱硬化,同樣進行評價。
如由本實施例所了解,依據本發明,可提供顯色之對比性良好、且無面內之顯色不均、具有光致變色特性之合成樹脂層合體及使用該合成樹脂層合體之太陽眼鏡、護目鏡、透鏡類之眼部用品。
A‧‧‧透明合成樹脂層(A)
B‧‧‧具有光致變色特性之功能層(B)
C‧‧‧透明樹脂層(C)
Claims (9)
- 一種合成樹脂層合體,其特徵為具有以下(A)至(C)者;2個透明合成樹脂層(A),介於該2個合成樹脂層(A)間的2個以上具有光致變色特性之功能層(B),介於該2個以上之功能層(B)間的透明樹脂層(C);該功能層(B)為含有光致變色色素,且由二異氰酸酯及多元醇所得之硬化層,前述光致變色色素含有選自由螺吡喃系化合物、螺噁嗪系化合物及萘并吡喃系化合物所成群之至少一種,其中介於前述功能層(B)間的前述透明樹脂層(C)為含有選自由芳香族聚碳酸酯、聚(甲基)丙烯酸酯、乙醯纖維素、聚醯胺、聚酯及芳香族聚碳酸酯與脂環式聚酯的混合物所成群的1個以上,且介於前述2個透明合成樹脂層(A)間的所有功能層(B)之厚度合計為30μm以上,且各該功能層(B)之厚度為15~25μm,各前述合成樹脂層(A)之厚度為100~800μm,前述樹脂層(C)之厚度為10~300μm。
- 如請求項1之合成樹脂層合體,其中於前述功能層(B)的一方及於與前述樹脂層(C)為反側存在的前述合成樹脂層(A)的一方之間,由前述功能層(B)側依序地具有偏光特性的樹脂層(D)與接著材層(E)。
- 如請求項1或2之合成樹脂層合體,其中前述樹脂層(C)具有偏光特性。
- 如請求項1或2之合成樹脂層合體,其中前述透明合成樹脂層(A)的至少一方為含有選自由芳香族聚碳酸酯、聚(甲基)丙烯酸酯、乙醯纖維素、聚醯胺及芳香族聚碳酸酯與脂環式聚酯的混合物所成群的1個之單層或者這些之2個以上經層合為一體化而成之多層。
- 如請求項4之合成樹脂層合體,其中前述透明合成樹脂層(A)的雙方為含有芳香族聚碳酸酯之單層。
- 如請求項1或2之合成樹脂層合體,其中介於前述功能層(B)間的前述透明樹脂層(C)為含有三乙醯纖素。
- 一種透鏡,其特徵為如請求項1至6中任一項之合成樹脂層合體經彎曲加工成為球面或者非球面而成之透鏡。
- 一種透鏡,其特徵為如請求項1至6中任一項之合成樹脂層合體經彎曲加工後成為於凹面側具有透明樹脂的一體射出成形體者。
- 一種眼部用品(eyewear),其特徵為使用如請求項7或8之透鏡。
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- 2017-03-07 CN CN201780016104.3A patent/CN108700689A/zh active Pending
- 2017-03-07 US US16/082,116 patent/US10737471B2/en active Active
- 2017-03-07 EP EP17763241.1A patent/EP3428698A4/en not_active Withdrawn
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| CN1580066A (zh) * | 2003-08-12 | 2005-02-16 | 上海迪赛诺医药科技开发有限公司 | 螺吡喃和螺噁嗪类光致变色化合物修饰核苷的方法 |
| CN1884277A (zh) * | 2006-06-05 | 2006-12-27 | 南开大学 | 二苯并、二萘并吡喃和二苯并、二萘并螺吡喃类化合物及制备 |
| CN101215282A (zh) * | 2007-12-27 | 2008-07-09 | 上海交通大学 | 光致变色萘并吡喃类化合物及其合成方法 |
| TW201423203A (zh) * | 2012-08-14 | 2014-06-16 | Mitsubishi Gas Chemical Co | 特殊聚碳酸酯製偏光眼鏡 |
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| CN103254453A (zh) * | 2013-04-24 | 2013-08-21 | 华中科技大学 | 一种聚合物分散有机凝胶光致变色薄膜的制备方法 |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20190084278A1 (en) | 2019-03-21 |
| WO2017154901A1 (ja) | 2017-09-14 |
| EP3428698A4 (en) | 2019-09-18 |
| TW201808633A (zh) | 2018-03-16 |
| JPWO2017154901A1 (ja) | 2019-01-17 |
| CN108700689A (zh) | 2018-10-23 |
| JP6900364B2 (ja) | 2021-07-07 |
| US10737471B2 (en) | 2020-08-11 |
| KR20180120736A (ko) | 2018-11-06 |
| KR102263213B1 (ko) | 2021-06-10 |
| EP3428698A1 (en) | 2019-01-16 |
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