CN104823228B - 微杯组合物 - Google Patents
微杯组合物 Download PDFInfo
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- CN104823228B CN104823228B CN201380061904.9A CN201380061904A CN104823228B CN 104823228 B CN104823228 B CN 104823228B CN 201380061904 A CN201380061904 A CN 201380061904A CN 104823228 B CN104823228 B CN 104823228B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
-
- G—PHYSICS
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Abstract
本发明涉及一种用于制备微杯的组合物,并且由这样一种组合物形成的显示器面板的韧度得到显著改善。在一些情况中,所述面板的断裂伸长可大于10%,所述面板可从基材层上完全剥离而不造成对面板的任何破坏,所述面板形成在所述基材层上。
Description
背景技术
美国专利第6,930,818号描述了用于形成显示器面板的微杯技术。根据该专利,可以通过间歇式方法或者连续式辊到辊方法来形成微杯。首先将用于形成微杯的组合物涂覆在基材层上,然后进行微压花(microembossing)或光刻法。优选的方法是通过在微杯组合物上施加阳模进行微压花以形成微杯。所述微杯组合物还可涂覆在阳模上,然后将基材层施加在顶部。所述阳模可以在微杯组合物硬化过程中或之后脱模。
所述形成的显示器面板通常是极薄的层,因而是脆性的。在基材层上形成微杯层之后,该微杯层很难从基材层上剥去而不造成对结构的破坏。
在本发明之前,人们考虑在显示器面板和基材层之间加入脱模层,从而在基材层上形成显示器面板后(如果需要的话)促进显示器面板从基材层上分离。但是,该方法有它的缺点。例如,通过微压花形成微杯会变得很难。这是由于在显示器面板和基材层之间存在脱模层的情况下,当将模具从部分固化的微杯中拉出时,所述层会过早地分离。此外,所述模具也会卡在部分固化的微杯中,从而造成对模具的永久性破坏。
一种可能的方法是增加微杯底部的厚度,从而使微杯能够承受将显示器面板与基材层分离的剥离力,并避免对显示器面板造成破坏。但是,在这种情况中,较厚的微杯底部会在微杯底部造成较大的电压降,这很可能导致用来驱动微杯内包含的显示器流体的电压不足。
另一种可能的方法是增大分隔微杯的间隔壁的厚度。但是,增大间隔壁的厚度会降低填充因子(fill factor),导致光学性能不如人意。
发明内容
本发明的一个方面涉及一种显示器面板,该显示器面板包括多个微杯,所述微杯填充有显示器流体并用密封层密封,所述面板的断裂伸长率大于10%。在一种实施方式中,所述面板的断裂伸长率大于20%。
本发明的另一个方面涉及一种显示器面板,该显示器面板包括(a)多个微杯和(b)底漆层,所述微杯填充有显示器流体并用密封层密封,所述面板的断裂伸长率大于5%。在一种实施方式中,所述显示器面板的断裂伸长率大于15%。
本发明的另一个方面涉及用于形成微杯的组合物,其包含:
(a)至少一种双官能的可紫外固化的组分;
(b)至少一种光引发剂;以及
(c)至少一种脱模剂。
在一种实施方式中,所述双官能的可紫外固化的组分的分子量大于约200。在一种实施方式中,所述双官能的可紫外固化的组分是双官能的丙烯酸酯。在一种实施方式中,所述双官能的丙烯酸酯具有氨基甲酸酯或乙氧基化主链。在一种实施方式中,所述双官能的可紫外固化的组分是二丙烯酸二甘醇酯、二丙烯酸三甘醇酯、二丙烯酸四甘醇酯、二丙烯酸聚乙二醇酯、二甲基丙烯酸聚乙二醇酯、乙氧基化双酚A二丙烯酸酯、乙氧基化双酚A二甲基丙烯酸酯或氨基甲酸酯二丙烯酸酯。
在一个实施方式中,所述光引发剂是双-酰基-氧化膦、2-苄基-2-(二甲基氨基)-1-[4-(4-吗啉基)苯基]-1-丁酮、2,4,6-三甲基苯甲酰基二苯基氧化膦、2-异丙基-9H-噻吨-9-酮、4-苯甲酰基-4'-甲基二苯基硫化物和1-羟基-环己基-苯基-酮、2-羟基-2-甲基-1-苯基-丙-1-酮、1-[4-(2-羟基乙氧基)-苯基]-2-羟基-2-甲基-1-丙-1-酮、2,2-二甲氧基-1,2-二苯基乙-1-酮或2-甲基-1[4-(甲硫基)苯基]-2-吗啉基丙-1-酮。
在一个实施方式中,所述脱模剂是有机改性的硅酮共聚物。
在一个实施方式中,所述组合物还包含共引发剂。在一个实施方式中,所述组合物还包含单官能的可紫外固化的组分。在一个实施方式中,所述组合物还包含多官能的可紫外固化的组分。在另一个实施方式中,所述组合物还包含稳定剂。
本发明的另一个方面涉及一种器件,其包括多个微杯,所述微杯由本发明的组合物形成,其中所述微杯填充有官能材料组合物并用密封层密封。在一个实施方式中,所述官能材料组合物是液体形式,例如电泳流体。在一个实施方式中,所述官能材料是药物试剂或美容试剂。在另一个实施方式中,所述器件还包括底漆层。
本发明的另一个方面涉及用于制备显示器件的方法,所述方法包括:
(a)形成显示器面板,所述显示器面板包括在基材层上的多个微杯,所述微杯由本发明的组合物形成,用显示器流体填充所述微杯,并对经填充的微杯进行密封;
(b)将所述显示器面板与所述基材层分离;以及
(c)在显示器面板的两侧层压电极层。
本发明的另一个方面涉及用于制备压电显示器件的方法,所述方法包括:
(a)形成显示器面板,所述显示器面板包括在第一基材层上的多个微杯,所述微杯由本发明的组合物形成,用显示器流体填充所述微杯,并对经填充的微杯进行密封;
(b)将所述显示器面板与所述第一基材层分离;
(c)在步骤(b)之前或之后,将所述显示器面板切割成任意尺寸的片;
(d)将显示器面板的片转移至第二基材层上,其中所述显示器面板的片之间具有间隙;以及
(e)用压电材料填充所述间隙。
附图说明
图1a和1b显示了基材层上基于微杯的面板的一般性结构。
图2显示了显示器面板与基材层的分离。
图3显示了本发明的面板。
图4和5阐释了由面板形成的显示器件。
图6阐释了由面板形成显示器件的一种替代性途径。
图7显示了从基材层上除去电极层以及面板。
图8阐释了使用面板制备压电显示器件。
发明详述
本发明的发明人现发现了一种用于制备微杯的组合物,并且由这样一种组合物形成的面板的韧度得到显著改善。在一些情况中,由这样一种的组合物形成的面板的断裂伸长率可大于10%,由其形成的面板可从基材层上完全剥离而不造成对面板的任何破坏,所述面板形成在所述基材层上。在本发明的上下文中,术语“断裂伸长率”或“伸长率”表示以下两种条件中的任一种或两种发生之前长度的增加百分数:
(i)微杯的结构完整性的损失,例如裂纹或裂缝变得可通过观察检测到,或者
(ii)填充在微杯中的液体组分泄漏变得可通过观察检测到。
在本申请的上下文中,术语“面板”指的是微杯的层,所述微杯填充有官能材料组合物(通常为液体形式)并用密封层严密密封。所述面板不包括基材层。然而,所述面板可包括一层或多层介电层,例如粘合剂材料的层、基质材料的层、粘合剂层、底漆层或者其它电极保护层的任意一种,用来为微杯中包含的官能材料提供支持。所述面板可包括夹在所述介电层之间或者暴露在外侧的导体层。
图1a显示了在基材层上的基于微杯的面板。如图所示,包含微杯(10a)的面板(10)形成在基材层(11)之上。任选具有微杯底部(10b),其由与微杯壁(10c)相同的组合物形成。在形成面板的过程中,所述微杯填充有官能材料组合物。所述官能材料组合物可以是显示器流体、药物组合物等。
如果所述流体是显示器流体,该流体可以是电泳流体,其包含分散在溶剂或溶剂混合物中的带电荷颜料颗粒。
然后根据美国专利第6,930,818号,进行一次式(one-pass)步骤或两次式步骤,用密封层(12)将经填充的微杯密封。在所述一次式方法中,将密封组合物预分散在官能材料的组合物中,将两种组合物的分散体涂覆在微杯上。在所述密封组合物流至所述官能材料组合物的顶部的过程中或之后,使所述密封组合物硬化。在所述“两次式”方法中,将官能材料组合物和密封组合物依次涂覆在微杯中,然后使密封组合物固化。在任一方法中,所述密封组合物和所述官能材料组合物优选是不可混溶的。所述密封组合物的硬化在原位发生(即,当所述密封组合物在所述官能材料组合物的顶部时,所述密封组合物正在发生硬化。)
美国专利第6,930,818号的全部内容通过引用纳入本文。
如图1b所示,可以有与面板相邻的底漆层(13)。
本发明的组合物包含(a)至少一种双官能的可紫外固化的组分,(b)至少一种光引发剂和(c)至少一种脱模剂。
a.双官能的可紫外固化的组分
所述组合物中的双官能的可紫外固化的组分的总百分数可约为10-99重量%,优选约为30-99重量%,更优选约50-99重量%。所述双官能的可紫外固化的组分具有两种反应性官能团。
适合用于本发明的双官能的组分的分子量可高于约200。优选双官能的丙烯酸酯,特别优选具有氨基甲酸酯或乙氧基化主链的双官能丙烯酸酯。
更具体地,合适的双官能组分可包括但不限于二丙烯酸二甘醇酯(例如,购自萨透膜公司(Sartomer)的SR230)、二丙烯酸三甘醇酯(例如,购自萨透膜公司的SR272)、二丙烯酸四甘醇酯(例如,购自萨透膜公司的SR268)、二丙烯酸聚乙二醇酯(例如,购自萨透膜公司的SR295,SR344或SR610)、二甲基丙烯酸聚乙二醇酯(例如,购自萨透膜公司的SR603,SR644,SR252或SR740)、乙氧基化双酚A二丙烯酸酯(例如,购自萨透膜公司的CD9038,SR349,SR601或SR602)、乙氧基化双酚A二甲基丙烯酸酯(例如,购自萨透膜公司的CD540,CD542,SR101,SR150,SR348,SR480或SR541),以及氨基甲酸酯二丙烯酸酯(例如,购自萨透膜公司的CN959,CN961,CN964,CN965,CN980或CN981;购自塞泰克公司(Cytec)的Ebecryl230,Ebecryl 270,Ebecryl 8402,Ebecryl 8804,Ebecryl8807或Ebecryl 8808)。
b.光引发剂
所述组合物中的光引发剂的总百分数可为约0.1-5重量%,优选约0.4-2重量%。
合适的光引发剂可包括但不限于双-酰基-氧化膦、2-苄基-2-(二甲基氨基)-1-[4-(4-吗啉基)苯基]-1-丁酮、2,4,6-三甲基苯甲酰基二苯基氧化膦、2-异丙基-9H-噻吨-9-酮、4-苯甲酰基-4'-甲基二苯基硫化物和1-羟基-环己基-苯基-酮、2-羟基-2-甲基-1-苯基-丙-1-酮、1-[4-(2-羟基乙氧基)-苯基]-2-羟基-2-甲基-1-丙-1-酮、2,2-二甲氧基-1,2-二苯基乙-1-酮或2-甲基-1[4-(甲硫基)苯基]-2-吗啉基丙-1-酮。
c.脱模剂
所述组合物中的脱模剂的百分数可为约1-10重量%,优选约2-6重量%。
合适的脱模剂可包括但不限于有机改性的硅酮共聚物,例如硅酮丙烯酸酯(例如,购自塞泰克公司(Cytec)的Ebercryl 1360或Ebercyl 350),硅酮聚醚(例如,购自迈图公司(Momentive)的Silwet 7200,Silwet 7210,Silwet 7220,Silwet7230,Silwet 7500,Silwet 7600或Silwet 7607)。
所述组合物还可任选地包含一种或多种以下组分:共引发剂,单官能的可紫外固化的组分、多官能的可紫外固化的组分或稳定剂。
d.共引发剂
可以向所述组合物中添加共引发剂以克服氧抑制,并改进表面固化速度。所述组合物中的共引发剂的百分数可为约0-20重量%,优选约5-10重量%。
合适的共引发剂可包括但不限于胺官能化的丙烯酸酯,例如购自萨透膜公司的CN371,CN373,CN384US或CN386US。
e.单官能的可紫外固化的组分
在本申请的上下文中,术语“单官能”指的是具有一个反应性官能团。
所述组合物中的单官能的可紫外固化的组分的百分数可为约0-80重量%,优选约0-40重量%。
合适的单官能的可紫外固化的组分可包括但不限于甲基丙烯酸甲酯、丙烯酸甲酯、甲基丙烯酸乙酯、丙烯酸乙酯、丙烯酸正丁酯、甲基丙烯酸正丁酯、甲基丙烯酸月桂酯、丙烯酸月桂酯、甲基丙烯酸2-乙基己基酯、丙烯酸2-乙基己基酯、甲基丙烯酸、丙烯酸、甲基丙烯酸羟基乙酯、丙烯酸羟基乙酯、苯乙烯或购自萨透膜公司的丙烯酸酯单体、例如CD551,CD553,CD611,CD9087,CD9088,SR256或SR504。
f.多官能的可紫外固化的组分
在本申请的上下文中,术语“多官能”指的是具有多于两个反应性官能团。
所述组合物中的多官能的可紫外固化的组分的百分数可为约0-80重量%,优选约0-40重量%。
合适的多官能的可紫外固化的组分可包括但不限于三官能的丙烯酸酯或甲基丙烯酸酯(例如,购自萨透膜公司的CD501,SR 415,SR444,SR454,SR499,SR502,CN972或SR9035)、四官能的或五官能的丙烯酸酯或甲基丙烯酸酯(例如,购自萨透膜公司的SR295,SR355,SR399,SR494或SR9041)、三官能的氨基甲酸酯丙烯酸酯(例如,购自萨透膜公司的CN929)或六官能的聚酯丙烯酸酯(例如购自塞泰克公司Ebecryl 830)。
g.稳定剂
可向微杯组合物中加入稳定剂,以确保固化后组合物的长期热耐久性和光耐久性。所述组合物中的稳定剂的百分数可为约0-10重量%,优选约0-5重量%。合适的稳定剂可包括但不限于酚醛树脂基、胺基、硫基和多官能的抗氧化剂,例如巴斯夫公司(BASF)提供的系列。
如美国专利第6,930,818号所述,使用本发明的微杯可通过微压花来制备、填充和密封。
由本发明的组合物制备的微杯层(20)在如图2a所示的填充之前或者如图2b所示的填充和密封之后可以很容易地与基材层(21)分开而不造成破坏。
如上所述,可以有底漆层,该底漆层与所述面板相邻。所述底漆层是任选的。
如果底漆层极薄(例如,<1μm)或者根本没有底漆层的话,固化后面板的机械强度优选伸长率>10%,更优选伸长率>20%。
如果底漆层较厚(例如,1~10μm)的话,固化后由上述微杯组合物衍生的面板的机械强度可为伸长率>5%,优选伸长率>15%。固化后,所述面板和底漆层的总机械强度需要满足伸长率>5%,优选伸长率>10%。
固化后,所述底漆层的组合物(如果存在的话)至少部分地与本发明的微杯组合物相容。
例如,所述底漆层可以由包含极性低聚或聚合物材料的组合物形成。此类极性低聚或聚合物材料可选自下组具有诸如以下基团中的至少一种基团的低聚物或聚合物:硝基(-NO2),羟基(-OH),羧基(-COO),氨基甲酸酯(-NH-C(O)-O),脲(NH-C(O)-NH),烷氧基(-OR其中R是烷基),卤素(例如氟、氯、溴或碘),氰基(-CN),磺酸根(-SO3)等。
极性聚合物材料的玻璃化转变温度优选低于约100℃,更优选低于约60℃。
较好的是,由此类组合物形成的底漆层的平均交联密度低于约1个交联点/80分子量,更优选低于约1个交联点/120分子量。可以通过向组合物中引入不同分子量的极性聚合物材料或极性低聚物材料来实现合适的交联密度。例如,可以将具有较高分子量的极性低聚物与另一种低分子量的极性低聚物混合来实现所需的交联密度。
合适的极性低聚物的例子可包括但不限于多羟基官能化的聚酯丙烯酸酯(例如,购自康涅狄格州温斯特市的博马特殊品公司(Bomar Specialties Co,Winsted,CT)的BDE1025)或烷氧基化的丙烯酸酯,例如乙氧基化的壬基苯酚丙烯酸酯(例如,购自萨透膜公司的SR504),乙氧基化的三羟甲基丙烷三丙烯酸酯(例如,购自萨透膜公司的SR9035)或乙氧基化的季戊四醇四丙烯酸酯(例如,购自萨透膜公司的SR494)。
合适的极性聚合物的例子可包括但不限于溶剂氨基甲酸酯聚合物,例如聚合物。
所述极性低聚物或聚合物材料与组合物中的其它组分相容,并且可以容易地通过简单混合来加工。
用于底漆层的组合物中的极性低聚或聚合物材料的重量百分数可不小于约1%,优选不小于约3%,最优选不小于约10%。
使用这样一种组合物,可以实现所述底漆层的预期体积电阻率约为填充在微杯中的电泳流体的约1/1000至100倍。在25℃和40%相对湿度下,所述底漆层的预期体积电阻率可约为107-1012欧姆-厘米。
任选地,可以将粘合促进剂加入底漆层组合物中,以确保对微杯结构的良好粘合性。此类粘合促进剂可包括但不限于羧酸化的丙烯酸酯、羟基化的丙烯酸酯、金属丙烯酸盐等,优选浓度约为0.1-15重量%。
任选地,可以将用于紫外固化的光引发剂加入底漆层组合物中,如果需要紫外固化的话。
本发明的面板可用于各种方式。下文提供几个实施例。
a)显示器件
在微杯填充有显示器流体(例如电泳流体)的情况中,所述面板可用于以下所示的实施例中。
图3所示的面板具有密封层(30)侧(3a)和非密封层侧(3b)。任一侧可以为显示器件的观看侧。
在图4中,密封层侧(4a)是观看侧。在这种情况下,透明的电极层(42)直接沉积或转移至所述面板(40)的密封层侧。所述透明电极可以是但不限于ITO(氧化铟锡)、碳纳米管、PEDOT[聚(3,4-亚乙基二氧基噻吩)]或银纳米线。在该组件中,在相反侧(具有或没有底漆层的情况下)上,为了使底板(44)结合至面板而加入粘合剂层(43)。
在图5中,非密封层侧(5b)是观看侧。在这种情况下,透明的电极层(52)直接沉积或转移至所述面板(50)上或底漆层(如果有底漆层的话)上。在该组件中,为了使底板(54)结合至面板,在密封层侧(5a)上加入粘合剂层(53)。
对于图4或5的显示器组件,通过透明电极层和底板之间的电压电势差来驱动。
任选地,将电极层直接沉积或转移至面板的两侧,以形成简单的单像素显示器或低分辨率段式显示器。在显示侧的电极必须是透明的。在背侧(非显示侧)的电极可以是不透明的,并且由导电性油墨(例如银油墨或炭黑油墨)制成,所述导电性油墨可以直接印刷在面板上用来形成段式显示器。
在另一个如图6所示的实施例中,组装了层的堆叠体(60)。在堆叠体中,有第一基材层(61),第一脱模层(62),电极层(63),粘合剂层(64),第二脱模层(65)和第二基材层(66)。在组装显示器件的时候,移除所述第一基材层(61)和第一脱模层(62),在电极层(63)上层压本发明的微杯面板(67)。在另一个步骤中,该步骤可以在移除所述第一基材层和第一脱模层之前或之后进行,移除所述第二基材层(66)和第二脱模层(65),然后添加辅助层(68),该辅助层(68)通过粘合剂层(64)施加。所述辅助层可以是如2008年11月25日提交的USSN 12/323,300、2008年11月25日提交的USSN 12/323,315以及2009年3月4日提交的USSN12/397,917所述的亮度增强层,滤色层,防眩光层、防磨层等。在另一侧,将底板(69)层压至面板(67)以完成该显示器件。
图7显示了另一个实施例。在该实施例中,在电极层(72)上形成微杯面板(71),所述电极层(72)与基材层(73)相关。当剥离面板时,电极层会保留在面板上代替基材层。这可以通过在基材层和电极层之间仔细选择具有最佳表面能的基材层来实现。在这种情况下,不优选ITO作为电极层,这是因为其在应力下的开裂现象。优选的电极层可以是银纳米线、碳纳米管、导电性聚合物,例如PEDOT等。任选地,存在与电极层相邻的保护层(74)以在分离和后加工过程中保护电极层。
还可以具有与面板相邻的底漆层。在该例子中,当从基材层上剥离时,面板、底漆层和电极层将在一起。
在另一个实施例中,在面板和基材层之间可存在脱模层,以进一步促进分离。如果所述面板和基材层之间存在底漆层的话,与所述面板相邻的底漆层也可很容易地从基材层上释放。
在图8所示的另一个实施例中,本发明的显示器面板在与其上形成了面板的基材层分开后可转移至另一基材层。在一个实施方式中,面板(81)在被转移至另一基材层(82)之前可切割成任意尺寸,并且在该情况中,可以在基材层(82)上的面板的片之间留下间隙(83),所述间隙可以用非显示器材料(84)(例如压电材料)填充。
b)经皮递送器件
所述面板还可用于药物应用,特别是用于经皮递送器件(例如膏药或贴片)。这种递送器件可用于局部或全身药物递送。填充在微杯中的药物组合物可包含活性成分,所述活性成分可以是药物试剂或美容试剂。所述药物可包括打算用于疾病的诊断、治愈、缓解、治疗或预防的物质,或者用来影响身体的结构或功能。所述药物试剂可以是单独的化学个体或其药学可接受的盐,其含量能够使得所述器件向所治疗的疾病或病症递送治疗有效的量。构成治疗有效量的量将根据以下因素变化:根据所使用的药剂的类型,待治疗的病症,任意共同给予的药物试剂,组合物能够保持与患者的皮肤接触的时间量,以及本领域技术人员已知的其它因素。
基于组合物的总重量,药物组合物中存在的活性试剂通常约为0.01-40重量%,优选约为1.0-20重量%。
适合用于经皮递送的任意药物都可用于本发明的面板。有用的药物的例子包括但不限于,抗炎药,抗菌剂,抗原虫药,抗真菌剂,冠状血管扩张剂,钙通道阻断剂,支气管扩张剂,酶抑制剂,抗高血压药,抗溃疡,甾体激素,抗病毒剂,免疫调节剂,局部麻醉剂,镇咳药,抗组胺剂,麻醉性镇痛药,肽类激素,性激素,酶,止恶心药,抗惊厥药,免疫抑制剂,精神治疗药,镇静药,抗凝血剂,止痛药,抗心律失常药,止吐药,避孕药,抗癌剂,神经剂,止血药,抗肥胖剂,吸烟停止治疗方案等。
所述用于药物应用的组合物也可以包含赋形剂,例如溶剂、助溶剂、增溶剂、溶剂改性剂、渗透促进剂、防腐剂、缓冲剂等。所述溶剂是组合物的主要成分,优选是其中活性成分是可溶性的或至少基本上可溶的或通过加入助溶剂或溶剂改性剂变为可溶的或变得可溶的中的一种。合适的溶剂可选自通常用于经皮递送的药物、化妆品、营养品或其它活性试剂的溶剂中的任意溶剂。优选的溶剂包括具有2-6个碳原子,优选2-4个碳原子的低级醇,并且可以是单醇,例如乙醇、异丙醇或仲丁醇或多元醇,例如乙二醇、丙二醇、丁二醇或甘油。还可以使用溶剂的混合物。也可以使用其它溶剂,例如酮(例如丙酮或甲基乙基酮)、醚(例如,乙醚),其用量将是安全且非毒性的。尽管溶剂体系通常是非水性的,可以将水用于水溶性活性成分,以及用于在水存在时稳定并且不因水的存在而破坏的活性成分。当水存在于溶剂中时,在一些情况中,根据活性成分并且只要可以实现本发明的目的,水的含量通常小于约50重量%,优选小于约10重量%,更优选小于约2重量%,所述含量以总溶剂的重量为基准计,但是也可以使用更高或更低的水含量。
通常,溶剂的总量将选择为确保活性成分和赋形剂的溶解,并且提供合适的产品粘度。基于总组合物,所用溶剂的量可落入约5-90重量%的范围,优选约25-75重量%。
填充在微杯中的组合物优选是溶液的形式。但是,也可以是悬浮液/分散体、乳液、凝胶等形式。
对于经皮递送应用,活性成分以所需的速率透过密封层。活性成分通过密封层的扩散取决于活性成分的性质、其中存在活性成分的溶剂、密封层/粘合剂层或者活性成分和皮肤之间的任意其它层的化学特性。扩散的速率通常会随着分子体积的增大而降低。另一方面,皮肤渗透速度受扩散系数、阻挡层分隔趋势、结合亲和力以及活性成分通过皮肤代谢的速率的影响。在该应用中,所述密封层优选是连续膜或微孔膜。可以由例如乙烯:乙酸乙烯酯共聚物来制备连续膜,所述共聚物可包含合适量的乙酸乙烯酯,例如约0.5-40重量%。
从基材层上除去(剥离)形成在基材上的面板,所述面板是在所述基材成上形成的,然后将该面板转移至另一膜层上。所述膜层,例如涂覆有压敏粘合剂的弹性绷带比其上形成面板的基材挠性更强,因此更适合用于皮肤,用于面板中的药物组合物的合适递送。
实施例
实施例1(比较例)
不含双官能组分的微杯组合物
将39.6重量份的Ebercryl 830(Cytec),51重量份的SR-399(Sartomer),7重量份的Ebercryl 1360(Cytec),0.2重量份的2,4,6-三甲基苯甲酰二苯基氧化膦和2.2重量份的1-羟基-环己基-苯基-酮均匀混合,用于拉伸强度测试。
实施例2
含有双官能组分的微杯组合物
将21重量份的Ebercryl 8808(塞泰克公司),39.7重量份的SR-602(萨透膜公司),25重量份的CD9038(萨透膜公司),4重量份的Silwet 7607(迈图公司),9.86重量份的CN373(萨透膜公司),0.2重量份的4-苯甲酰-4'-甲基二苯基硫化物和0.24重量份的2,4,6-三甲基苯甲酰二苯基氧化膦均匀混合,并用于拉伸测试。
实施例3
已固化的微杯材料的拉伸测试
将实施例1和2的微杯组合物涂覆至5密耳PET膜上,目标干厚度约为100微米,用PET脱模膜覆盖,然后在紫外光下以5mW/cm2的强度固化20秒。除去PET覆盖片。从PET基材上剥离已固化的微杯层,将其切割为宽度为1.25厘米、长度为10厘米的条带。然后以50毫米/分钟通过Instron来进行拉伸测试。表1中所列的结果为至少5次测量的平均值。包含双官能组分的微杯组合物显示出明显改善的断裂伸长率和韧度。
表1.
实施例1 | 实施例2 | |
拉伸强度(N/m2) | 8.25x106 | 3.95x106 |
断裂伸长率(%) | 1.31 | 22.86 |
韧度(J/m3) | 5.37x106 | 45.43x106 |
实施例4
面板的拉伸测试
根据美国专利第6,930,818号通过微压花将实施例2的微杯组合物用来制备厚度大约为27微米的微杯阵列。在ITO/PET基材膜上将电泳流体涂覆在微杯阵列上,所述电泳流体包含分散在烃溶剂中的带电颜料颗粒。然后用密封层密封经填充的微杯,所述密封层的厚度约为17微米,然后根据美国专利第6,930,818号进行一次式步骤。然后从ITO/PET基材膜上剥离微杯基面板,进行实施例3所述的拉伸测试。
在微杯结构被破坏前测得伸长率为18%。
使用实施例1的微杯组合物无法进行相同的测试,这是因为由实施例1的组合物制备的面板无法在不使面板遭到破坏的情况下从ITO/PET基材膜上分离。
虽然参考具体实施方式描述了本发明,但本领域技术人员应理解可在不背离本发明真实构思和范围的情况下作出各种改变并用其等同形式替代。此外,可根据本发明目的、构思和范围进行许多修改以适应特定情况、材料、组合物、方法、工艺步骤。所有这些修改均应包括在所附权利要求书的范围之内。
因此,本发明在现有技术允许的最大范围内受所附权利要求的范围结合说明书的限定。
Claims (4)
1.一种显示器面板,该显示器面板包含多个微杯,所述微杯填充有显示器流体并且被密封层密封,其中,所述显示器面板的断裂伸长率大于10%,以及其中,用于形成所述微杯的组合物包含至少一种双官能的可紫外固化的组分,所述双官能的可紫外固化的组分是二丙烯酸二甘醇酯、二丙烯酸三甘醇酯、二丙烯酸四甘醇酯、二丙烯酸聚乙二醇酯、二甲基丙烯酸聚乙二醇酯、乙氧基化双酚A二丙烯酸酯或乙氧基化双酚A二甲基丙烯酸酯。
2.如权利要求1所述的显示器面板,其特征在于,所述显示器面板的断裂伸长率大于20%。
3.一种显示器面板,该显示器面板包含(a)多个微杯和(b)底漆层,所述微杯填充有显示器流体并且被密封层密封,其中,所述显示器面板的断裂伸长率大于5%,以及其中,用于形成所述微杯的组合物包含至少一种双官能的可紫外固化的组分,所述双官能的可紫外固化的组分是二丙烯酸二甘醇酯、二丙烯酸三甘醇酯、二丙烯酸四甘醇酯、二丙烯酸聚乙二醇酯、二甲基丙烯酸聚乙二醇酯、乙氧基化双酚A二丙烯酸酯或乙氧基化双酚A二甲基丙烯酸酯。
4.如权利要求3所述的显示器面板,其特征在于,所述显示器面板的断裂伸长率大于15%。
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EP2926333A4 (en) | 2017-01-04 |
US20140147478A1 (en) | 2014-05-29 |
EP2926333B1 (en) | 2018-01-31 |
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US9388307B2 (en) | 2016-07-12 |
TW201639915A (zh) | 2016-11-16 |
TWI593740B (zh) | 2017-08-01 |
CN106847119B (zh) | 2020-04-28 |
CN104823228A (zh) | 2015-08-05 |
CN106847119A (zh) | 2017-06-13 |
TWI550011B (zh) | 2016-09-21 |
WO2014085094A1 (en) | 2014-06-05 |
EP2926333A1 (en) | 2015-10-07 |
TW201434930A (zh) | 2014-09-16 |
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US20160279072A1 (en) | 2016-09-29 |
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