CN102558729A - 紫外反射性组合物 - Google Patents

紫外反射性组合物 Download PDF

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CN102558729A
CN102558729A CN2011102997887A CN201110299788A CN102558729A CN 102558729 A CN102558729 A CN 102558729A CN 2011102997887 A CN2011102997887 A CN 2011102997887A CN 201110299788 A CN201110299788 A CN 201110299788A CN 102558729 A CN102558729 A CN 102558729A
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钟昭仁
E·农格瑟
E·E·拉弗勒
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Abstract

一种包含聚合物颗粒的组合物。所述聚合物颗粒的平均粒径为30-300纳米,维氏标度硬度为100-700千克力/毫米2。所述组合物还包含Tg不高于80℃的成膜聚合物。所述聚合物颗粒与成膜聚合物的折射率之差至少为0.04。

Description

紫外反射性组合物
技术领域
本发明涉及能够自缔合形成紫外反射膜的聚合物颗粒,所述紫外反射膜特别适合用来保护基材免受紫外光的破坏作用。
背景技术
人们已经揭示了用胶态晶体来反射紫外光。例如,美国专利公开第2006/0182968号揭示了将颗粒的液体分散体用于该用途。但是,此种方法需要使用染料以及通过渗析从分散体除去离子组分。
本发明所解决的问题是提供一种能够形成紫外反射膜的聚合物颗粒。
发明内容
本发明提供了一种组合物,该组合物包含具有以下性质的聚合物颗粒:(a)平均粒径为30-300纳米;以及(b)维氏标度硬度为100-700千克力/毫米2;以及Tg不高于80℃的成膜聚合物;其中,所述聚合物颗粒与所述成膜聚合物的折射率之差至少为0.04。
本发明还涉及一种膜,所述膜包含:具有以下性质的聚合物颗粒:(a)平均粒径为30-300纳米;(b)维氏标度硬度为100-700千克力/毫米2;以及Tg不高于80℃的连续聚合物相;其中,所述聚合物颗粒和所述连续聚合物相的折射率之差至少为0.04;所述聚合物颗粒之间的平均距离为35-400纳米。
发明详述
除非另外说明,百分数为重量百分数(重量%),温度的单位为℃。折射率(RI)的值是在20℃用钠的D线测定的,其中λ=589.29纳米。聚合物颗粒包含有机聚合物,优选加成聚合物,优选基本是球形的。测得的平均粒径是算术平均粒径。Tg值使用福克斯公式,由均聚物的Tg值计算;见美国物理学会会刊(Bulletin of the American Physical Society)1,3,第123页(1956)。根据加入多段聚合物的某段的聚合混合物的单体的总重量计算各段的单体的重量百分数。在本文中,术语“(甲基)丙烯酸类”表示丙烯酸类或甲基丙烯酸类,“(甲基)丙烯酸酯”表示丙烯酸酯或甲基丙烯酸酯。术语“(甲基)丙烯酰胺”指丙烯酰胺(AM)或甲基丙烯酰胺(MAM)。“丙烯酸类单体”包括丙烯酸(AA),甲基丙烯酸(MAA),AA和MAA的酯,衣康酸(IA),巴豆酸(CA),丙烯酰胺(AM),甲基丙烯酰胺(MAM),以及AM和MAM的衍生物,例如烷基(甲基)丙烯酰胺。AA和MAA的酯包括但不限于,烷基酯、羟烷基酯、磷酸烷基酯和磺基烷基酯,例如甲基丙烯酸甲酯(MMA),甲基丙烯酸乙酯(EMA),甲基丙烯酸丁酯(BMA),甲基丙烯酸羟乙酯(HEMA),丙烯酸羟乙酯(HEA),甲基丙烯酸羟丙酯(HPMA),丙烯酸羟丁酯(HBA),丙烯酸甲酯(MA),丙烯酸乙酯(EA),丙烯酸丁酯(BA),丙烯酸-2-乙基己酯(EHA)和甲基丙烯酸磷酸烷基酯(PEM)。“苯乙烯类单体”包括苯乙烯,α-甲基苯乙烯;2-,3-或4-烷基苯乙烯,包括甲基-苯乙烯和乙基-苯乙烯;二乙烯基苯和二乙烯基甲苯。
术语“乙烯基单体”表示一种单体,其包含与氮或氧之类的杂原子相连的碳-碳双键。乙烯基单体的例子包括但不限于乙酸乙烯酯,乙烯基甲酰胺,乙烯基乙酰胺,乙烯基吡咯烷酮,乙烯基己内酰胺,以及长链乙烯基链烷酸酯,例如新癸酸乙烯基酯和硬脂酸乙烯基酯。
较佳的是,所述聚合物颗粒的维氏标度硬度(Vicker’s scale hardness)为150-600千克力/毫米2,优选为200-500千克力/毫米2,优选为240-400千克力/毫米2。维氏硬度是使用具有金刚石尖头的标准硬度测量计测定的。硬度根据式Hv=1.85444(P/d2)确定,其中P是负荷,单位为千克,d2是压痕的面积,单位为毫米2。对于具有本发明尺寸范围的颗粒,由具有相同组成的较大的颗粒测量硬度。使用岛津微型压力试验机(Shimadzu MicroCompression Testing Machine)MCT 500测量本发明的颗粒的硬度。
较佳的是,所述聚合物颗粒是以下的颗粒:(a)Tg为75-150℃的颗粒;(b)包含至少0.5%的交联剂聚合残基的颗粒;或它们的组合。当所述颗粒的Tg为-50℃至75℃的时候,优选所述颗粒包含至少0.5%的交联剂的残基,优选至少0.75%,优选至少1%,优选至少1.25%,优选至少1.5%,优选至少2%,优选至少3%,优选至少5%。Tg为75-150℃的颗粒可以包含上文所述的量的交联剂残基,或者其中交联剂残基的含量可以低得多。所述聚合物颗粒还可以是高度交联的,具有高Tg,例如通过二乙烯基芳族单体(例如二乙烯基苯)或者由单体混合物聚合形成的颗粒,所述单体混合物包含大量的二乙烯基芳族单体,优选至少30%,优选至少50%,优选至少70%,优选至少80%,以及其它的单体,优选苯乙烯类或丙烯酸类单体。
优选的是,所述聚合物颗粒的平均粒径至少为50纳米,优选至少为70纳米,优选至少为80纳米。较佳的是,所述聚合物颗粒的平均粒径不大于260纳米,优选不大于230纳米,优选不大于200纳米,优选不大于170纳米,优选不大于140纳米。较佳的是,所述聚合物颗粒具有单峰的粒度分布;优选所述粒度分布的半峰宽为5-70纳米,优选10-30纳米。所述组合物或膜可以包含具有不同的平均粒径的颗粒,前提是各种平均粒径的颗粒具有上文所述的粒度分布。所述粒度分布使用粒度分析仪测定。较佳的是,所述聚合物颗粒和成膜聚合物以多段聚合物颗粒的形式结合,所述多段聚合物颗粒的平均粒径至少为50纳米,优选至少为70纳米,优选至少为90纳米,优选至少为110纳米,优选至少为140纳米。较佳的是,所述多段聚合物颗粒的平均粒径不大于450纳米,优选不大于400纳米,优选不大于350纳米,优选不大于300纳米,优选不大于260纳米,优选不大于240纳米,优选不大于220纳米,优选不大于200纳米。较佳的是,所述多段聚合物颗粒是两段颗粒,即至少70%的颗粒的具有本文所述的聚合物颗粒和成膜聚合物的性质,优选至少80%,优选至少90%,优选至少95%。所述多段聚合物颗粒可以是包含上述聚合物颗粒作为芯、以所述成膜聚合物作为壳的芯壳型颗粒,或者所述成膜聚合物可以不连续地分布在所述聚合物颗粒的表面上。
较佳的是,所述聚合物颗粒的Tg为75-150℃。较佳的是,所述聚合物颗粒的Tg至少为80℃,优选至少为85℃,优选至少为90℃,优选至少为95℃。较佳的是,所述聚合物颗粒的Tg不高于140℃,优选不高于130℃,优选不高于120℃。较佳的是,所述成膜聚合物或连续聚合物相的Tg不高于60℃,优选不高于50℃,优选不高于40℃,优选不高于30℃,优选不高于20℃,优选不高于10℃,优选不高于0℃,优选不高于-10℃。较佳的是,所述成膜聚合物或连续聚合物相的Tg至少为-50℃,优选至少为-40℃,优选至少为-30℃。
本文所述的折射率之差是绝对值。较佳的是,所述聚合物颗粒和成膜聚合物之间、或者聚合物颗粒与连续聚合物相之间的折射率之差(即差值的绝对值)至少为0.06,优选至少为0.08,优选至少为0.09,优选至少为0.1,优选至少为0.105。较佳的是,所述聚合物颗粒与成膜聚合物之间、或者聚合物颗粒与连续聚合物相之间的折射率之差不大于0.2,优选不大于0.17,优选不大于0.15。较佳的是,所述聚合物颗粒的折射率为1.45至1.75,优选为1.5-1.67,优选为1.53-1.65。较佳的是,所述成膜聚合物或连续聚合物相的折射率为1.4至1.6,优选为1.4至1.55,优选为1.42至1.52。较佳的是,所述聚合物颗粒的折射率大于所述成膜聚合物或连续聚合物相的折射率。
在本发明的组合物中,所述成膜聚合物与聚合物颗粒的重量比为0.8∶1至15∶1,优选为1∶1至10∶1,优选为1.2∶1至8∶1。在所述膜的连续相中,所述聚合物颗粒之间的距离,即颗粒中心到中心的距离为40-300纳米,优选50-200纳米,优选70-130纳米。
较佳的是,所述成膜聚合物或连续聚合物相包含至少60%的丙烯酸类单体的聚合残基,优选至少70%,优选至少80%,优选至少90%,优选至少95%。较佳的是,所述成膜聚合物或连续聚合物相包含35-70%的(甲基)丙烯酸C4-C12烷基酯的聚合残基,优选40-65%,优选45-65%。较佳的是,所述(甲基)丙烯酸C4-C12烷基酯是丙烯酸C4-C12烷基酯,优选是丙烯酸C4-C10烷基酯,优选是BA和/或EHA。较佳的是,所述成膜聚合物或连续聚合物相还包含30-65%的(甲基)丙烯酸C1-C4烷基酯的聚合残基,优选35-60%,优选35-55%,还包含0-5%的酸单体(例如AA,MAA,IA,CA)的聚合残基,还包含少量的乙烯基单体的残基。较佳的是,所述(甲基)丙烯酸C1-C4烷基酯是(甲基)丙烯酸C1-C2烷基酯,优选是MMA和/或EMA。较佳的是,所述聚合物颗粒包含至少60%的苯乙烯类单体的聚合残基,优选至少70%,优选至少80%,优选至少90%,优选至少95%。较佳的是,所述聚合物颗粒还包含0-5%的酸单体(例如AA,MAA,IA,CA)的聚合残基,优选包含0.5-4%的AA和/或MAA,还可以包含少量的乙烯基单体的残基。
交联剂是包含两个或更多个烯键式不饱和基团的单体、或者偶联剂(例如硅烷)或离子型交联剂(例如金属氧化物)。具有两个或更多个烯键式不饱和基团的交联剂可以包括例如,二乙烯基芳族化合物,二-、三-和四-(甲基)丙烯酸酯,二-、三-和四-烯丙基醚或酯化合物,以及(甲基)丙烯酸烯丙酯。这些单体的优选例子包括二乙烯基苯(DVB),三羟甲基丙烷二烯丙基醚,四烯丙基季戊四醇,三烯丙基季戊四醇,二烯丙基季戊四醇,邻苯二甲酸二烯丙酯,马来酸二烯丙酯,氰脲酸三烯丙酯,双酚A二烯丙基醚,烯丙基蔗糖,亚甲基二丙烯酰胺,三羟甲基丙烷三丙烯酸酯,甲基丙烯酸烯丙酯(ALMA),二甲基丙烯酸乙二醇酯(EGDMA),二丙烯酸1,6-己二醇酯(HDDA)和二甲基丙烯酸丁二醇酯(BGDMA)。较佳的是,所述成膜聚合物或连续聚合物相中的聚合的交联剂残基的量不大于0.2%,优选不大于0.1%,优选不大于0.05%,优选不大于0.02%,优选不大于0.01%。较佳的是,所述Tg为75-150℃的聚合物颗粒中的聚合的交联剂残基的量不大于0.5%,优选不大于0.3%,优选不大于0.2%,优选不大于0.1%,优选不大于0.05%。较佳的是,如果包含交联剂,交联剂的分子量为100-250,优选为110-230,优选为110-200,优选为115-160。较佳的是,交联剂是双官能或三官能的,即其分别为二烯键式或三烯键式不饱和的,优选是双官能的。
较佳的是,本发明的组合物是本发明的聚合物颗粒的水乳液,其固体含量优选为35-65%,优选为40-60%。当在多段颗粒中将聚合物颗粒与成膜聚合物结合的时候,优选通过多段乳液聚合,由合适的单体制备所述组合物。较佳的是,有两个聚合段,在这些聚合段中,将不同的单体组合物引入聚合,但是可以用更多的段制备所述颗粒,以提供本文所述的总体组成。较佳的是,所述组合物和所述膜基本不含颜料或固体无机颗粒,即这些组分的含量小于0.5重量%,优选小于0.2重量%,优选小于0.1重量%,优选小于0.05重量%。
较佳的是,包含本发明的聚合物颗粒的膜是通过以下方式制备的:将本发明的多段聚合物颗粒的水乳液施涂在固体基材上,使得涂层干燥。较佳的是,所述基材是玻璃、木材、砖石建筑、清水墙,皮革,纸张,织物,金属,塑料,涂覆在上述任意基材上的漆膜或其它的聚合物涂层,或者光学透明塑料,例如聚(对苯二甲酸乙二酯);优选是玻璃或光学透明塑料。较佳的是,所述湿涂层的厚度为0.25-30密耳(0.0064-0.76毫米),优选为2-30密耳(0.05-0.76毫米),优选为4-20密耳(0.1-50毫米),优选为6-12密耳(0.15-0.3毫米)。认为所述聚合物颗粒缔合形成基本为面心立方或六方紧密堆积结构的芯的基体,而外层形成连续聚合物相。
实施例
实施例1
通过以下工艺步骤制备了由以下组分组成的多段聚合物颗粒的一个实施例样品:苯乙烯、丙烯酸丁酯和甲基丙烯酸:(1(97苯乙烯/3MAA)/1.5(58BA/41MMA/1MAA)):
在5升圆底烧瓶上安装桨式搅拌器、温度计、氮气进口和回流冷凝器。在氮气气氛下在搅拌下向该烧瓶中的733.8克加热至89℃的去离子水中加入3.01克SIPONATE DS-4(22.5%固体),然后加入50.83克由以下组分制备的单体乳液:377.31克去离子水,10.88克SIPONATE DS-4(22.5%固体),581.82克苯乙烯和17.99克MAA。将溶解在13.89克水中的0.65克过硫酸钱加入该烧瓶中。在温度达到峰值之后,在85℃的温度下,在120分钟内将剩余的单体乳液加入反应釜中,加入速率如下:前5分钟的加入速率是剩下的115分钟的加入速率的一半。在加料时间过程中,还向反应釜中加入溶解在55.56克水中的0.28克过硫酸铵。单体加入5分钟之后,在15分钟内将溶解在60.19克水中的0.23克过硫酸铵加入反应釜中,然后加入416.67克去离子水。在反应釜冷却至20℃之后,加入溶解在20克去离子水中的1.8克1.0%的FeSO4.7H2O以及1.8克1.0%的VERSENE,在90分钟的时间内将溶解在45.0克去离子水中的3.5克叔丁基过氧化氢(70%)和溶解在45.0克去离子水中的2.40克异抗坏血酸的溶液加入反应釜中。初始加入2分钟之后,以7克/分钟的速率加入由以下组分制备的第二单体乳液:226克去离子水,14.60克SIPONATE DS-4(22.5%固体),522克BA,369克MMA和9克MAA。30分钟之后,速率增大到14克/分钟,再经过30分钟之后,速率增大到17克/分钟。加料之后,在15分钟的时间内向反应釜中加入溶解在15.0克去离子水中的1.6克叔丁基过氧化氢(70%)以及溶解在15.0克去离子水中的0.90克异抗坏血酸。然后在低于45℃的温度下,用20克14%的氨水对乳液聚合物进行中和。
实施例:2-4
这些实施例描述了在0.16毫米的聚(对苯二甲酸乙二酯)基材(MYLAR)上制备薄膜涂层。使用布鲁克哈温仪器公司粒度分析仪(BrookhavenInstruments particle size analyzer)BI-90测量各种胶乳的粒度,测得的值列于下表1。实施例显示了自缔合的颗粒的光学性能。组成列于表1。使用伯德涂膜器(3密耳湿厚度)或DOW棒(20密耳湿厚度)拉制膜。在120℃的烘箱中,对大部分涂覆的样品干燥3分钟,然后用U-2000型双光束紫外/可见光分光光度计进行测定。
实施例:5-8
表I所列的实施例以类似的方式在聚(对苯二甲酸乙二酯)基材(MYLAR)上制备0.16毫米的涂层。使用布鲁克哈温仪器公司粒度分析仪(Brookhaven Instruments particle size analyzer)BI-90测量各种胶乳的粒度,测得的值列于下表1。实施例显示了自缔合的颗粒的光学性能。使用伯德涂膜器(3密耳湿厚度)或DOW棒(20密耳湿厚度)拉制所有的膜。大部分的涂覆的样品在120℃的烘箱中干燥3分钟。使用U-2000型双光束紫外/可见光分光光度计测量紫外/可见光透射率(%T)。
实施例:9-13
表I所列的以下实施例以类似的方式在聚(对苯二甲酸乙二酯)基材(MYLAR)上制备0.16毫米的涂层。使用布鲁克哈温仪器公司粒度分析仪(Brookhaven Instruments particle size analyzer)BI-90测量各种胶乳的粒度,测得的值列于下表1。实施例显示了自缔合的颗粒的光学性能。使用伯德涂膜器(3密耳湿厚度)或DOW棒(20密耳湿厚度)拉制所有的膜。大部分的涂覆的样品在120℃的烘箱中干燥3分钟。使用U-2000型双光束紫外/可见光分光光度计测量紫外/可见光透射率。
实施例:14-16
表I所列的膜组成和光学性能是通过将分散体施涂在0.16毫米的PET,聚(对苯二甲酸乙二酯)基材(MYLAR)基材上而制备。使用布鲁克哈温仪器公司粒度分析仪(Brookhaven Instruments particle size analyzer)BI-90测量各种胶乳的粒度,测得的值列于下表1。实施例显示了自缔合的颗粒的光学性能。使用伯德涂膜器(3密耳湿厚度)或DOW棒(20密耳湿厚度)拉制所有的膜。大部分的涂覆的样品在120℃的烘箱中干燥3分钟。使用U-2000型双光束紫外/可见光分光光度计测量紫外/可见光透射率。
实施例:17
表I所列的膜组成和光学性能是通过将分散体施涂在0.16毫米的PET,聚(对苯二甲酸乙二酯)基材(MYLAR)基材上而制备。使用布鲁克哈温仪器公司粒度分析仪(Brookhaven Instruments particle size analyzer)BI-90测量各种胶乳的粒度,测得的值列于下表1。实施例显示了自缔合的颗粒的光学性能。使用伯德涂膜器(3密耳湿厚度)或DOW棒(20密耳湿厚度)拉制膜。涂覆的样品在120℃的烘箱中干燥3分钟。使用U-2000型双光束紫外/可见光分光光度计测量紫外/可见光透射率。
实施例:18-19
表I所列的膜组成和光学性能是通过将分散体施涂在0.16毫米的PET,聚(对苯二甲酸乙二酯)基材(MYLAR)基材上而制备。使用布鲁克哈温仪器公司粒度分析仪(Brookhaven Instruments particle size analyzer)BI-90测量各种胶乳的粒度,测得的值列于下表1。实施例显示了自缔合的颗粒的光学性能。使用伯德涂膜器(3密耳湿厚度)或DOW棒(20密耳湿厚度)拉制所有的膜。大部分的涂覆的样品在120℃的烘箱中干燥3分钟。使用U-2000型双光束紫外/可见光分光光度计测量紫外/可见光透射率。
实施例:20-22
表I所列的膜组成和光学性能是通过将分散体施涂在0.16毫米的PET,聚(对苯二甲酸乙二酯)基材(MYLAR)基材上而制备。使用布鲁克哈温仪器公司粒度分析仪(Brookhaven Instruments particle size analyzer)BI-90测量各种胶乳的粒度,测得的值列于下表1。实施例显示了自缔合的颗粒的光学性能。使用伯德涂膜器(3密耳湿厚度)或DOW棒(20密耳湿厚度)拉制所有的膜。大部分的涂覆的样品在120℃的烘箱中干燥3分钟。使用U-2000型双光束紫外/可见光分光光度计测量紫外/可见光透射率。
实施例:23-25
表1列出的聚合物组合物是胶态胶乳分散体的形式。将分散体涂覆在0.16毫米的PET,聚(对苯二甲酸乙二酯)膜(MYLAR)上。使用布鲁克哈温仪器公司粒度分析仪(Brookhaven Instruments particle size analyzer)BI-90测量各种胶乳的粒度,测得的值列于下表1。实施例显示了自缔合的颗粒的光学性能。使用伯德涂膜器(3密耳湿厚度)或DOW棒(20密耳湿厚度)拉制所有的膜。大部分的涂覆的样品在120℃的烘箱中干燥3分钟。使用U-2000型双光束紫外/可见光分光光度计测量紫外/可见光透射率。
实施例:26-28
表1列出的聚合物组合物是胶态胶乳分散体的形式。将分散体涂覆在0.16毫米的PET,聚(对苯二甲酸乙二酯)膜(MYLAR)上。使用布鲁克哈温仪器公司粒度分析仪(Brookhaven Instruments particle size analyzer)BI-90测量各种胶乳的粒度,测得的值列于下表1。实施例显示了自缔合颗粒的光学性能。使用伯德涂膜器(3密耳湿厚度)或DOW棒(20密耳湿厚度)拉制所有的膜。大部分的涂覆的样品在120℃的烘箱中干燥3分钟。使用U-2000型双光束紫外/可见光分光光度计测量紫外/可见光透射率。
实施例:29-37
这些实施例显示了将增稠剂,ACRYSOL ASE-60增稠剂用于提高胶态胶乳的粘度。如表I所示,将包括ASE-60增稠剂和不包括ASE增稠剂的胶乳组合物涂覆在0.16毫米的PET,聚(对苯二甲酸乙二酯)膜(MYLAR)上。使用布鲁克哈温仪器公司粒度分析仪(Brookhaven Instruments particle sizeanalyzer)BI-90测量各种胶乳的粒度,测得的值列于下表1。这些实施例显示了自缔合颗粒的光学性能。使用伯德涂膜器(3密耳湿厚度)或DOW棒(20密耳湿厚度)拉制所有的膜。大部分的涂覆的样品在120℃的烘箱中干燥3分钟。使用U-2000型双光束紫外/可见光分光光度计测量紫外/可见光透射率。
实施例:38-45
表1列出的聚合物组合物是胶态胶乳分散体的形式。将分散体涂覆在0.16毫米的PET,聚(对苯二甲酸乙二酯)膜(MYLAR)上。使用布鲁克哈温仪器公司粒度分析仪(Brookhaven Instruments particle size analyzer)BI-90测量各种胶乳的粒度,得到的值是整个多段颗粒的粒度。这些实施例显示了自缔合颗粒的光学性能。使用伯德涂膜器(3密耳湿厚度)或DOW棒(20密耳湿厚度)拉制所有的膜。大部分的涂覆的样品在120℃的烘箱中干燥3分钟。使用U-2000型双光束紫外/可见光分光光度计测量紫外/可见光透射率。预期芯的折射率非常接近聚苯乙烯的折射率,丙烯酸类外层的折射率接近丙烯酸酯聚合物的折射率,即分别为1.59和1.46-1.49。
表1-紫外反射涂层的光学性能和化学组成
Figure BSA00000586935900101
Figure BSA00000586935900111
Figure BSA00000586935900121
Figure BSA00000586935900131
表I(续):紫外反射涂层的光学性能和化学组成
Figure BSA00000586935900132
实施例:46-57
在本系列的实施例中,将自缔合颗粒的分散体以3密耳(0.076毫米)的湿涂层厚度施涂在玻璃基材上,在55%的相对湿度下暴露于紫外辐射之中。测试板的表面积尺寸如下:83毫米×76毫米。通过以下方法对这些板进行评价:ASTM D 10003-00(透明塑料的雾度和透光率的标准测试法)和ASTME 313-00(由仪器测量的色坐标计算黄度和白度指数的标准作法)。
表II-使用伯德涂膜器在玻璃上拉制的样品的耐候试验机研究。
实施例:58-67
本实施例描述了上文所述的表I的自缔合颗粒与增稠剂A、ACRYSOLASE-60增稠剂的掺混物。将各种增稠的胶乳组合物涂覆在Mylar膜上。测试板的表面积尺寸如下:77毫米×56毫米。所有的膜涂层在120℃的烘箱中干燥3分钟。通过在U-2000型双光束紫外/可见光分光光度计上测量紫外/可见光透射率来评价样品。
记作“实施例80”的组合物是1份(苯乙烯/MAA=99/1)//9份(BA/MMA/MAA=58/41/01)
表III:自缔合颗粒和增稠剂A的掺混物
Figure BSA00000586935900142
Figure BSA00000586935900151
实施例:68-73
在这些实施例中,将182纳米的自缔合颗粒(实施例2)与98纳米的自缔合颗粒(实施例5)以及增稠剂ASE-60混合,形成涂料组合物。将表IV所列的组合物施涂在玻璃基材上。对使用3-密耳的伯德涂膜器在玻璃基材上拉制的样品在QUV耐候试验机中进行1000小时的紫外光照射。测试板的表面积尺寸如下:83毫米×76毫米。通过以下方法对这些板进行评价:ASTMD 10003-00(透明塑料的雾度和透光率的标准测试法)和ASTM  E 313-00(由仪器测量的色坐标计算黄度和白度指数的标准作法)。
实施例:74-79
在这些实施例中,将182纳米的自缔合颗粒(实施例2)与40纳米的自缔合颗粒(实施例17)以及ASE-60增稠剂混合,形成涂料组合物。将表IV所列的组合物施涂在玻璃基材上。对使用3-密耳的伯德涂膜器在玻璃基材(表面积为83毫米×76毫米)上拉制的样品在QUV耐候试验机中进行1000小时的紫外光照射。L,a,b值,雾度数据,YI和透射率%通过以下方法进行评价:ASTM D 10003-00(透明塑料的雾度和透光率的标准测试法)和ASTME 313-00(由仪器测量的色坐标计算黄度和白度指数的标准作法)。
表IV:由自缔合颗粒和掺混物制备的膜的耐候试验机研究
Figure BSA00000586935900161
Figure BSA00000586935900171

Claims (10)

1.一种组合物,该组合物包含具有以下性质的聚合物颗粒:(a)平均粒径为30-300纳米;以及(b)维氏标度硬度为100-700千克力/毫米2;以及Tg不高于80℃的成膜聚合物;其中,所述聚合物颗粒与所述成膜聚合物的折射率之差至少为0.04。
2.如权利要求1所述的组合物,其特征在于,所述聚合物颗粒与成膜聚合物的折射率之差至少为0.08。
3.如权利要求2所述的组合物,其特征在于,所述平均粒径为70-260纳米。
4.如权利要求3所述的组合物,其特征在于,所述聚合物颗粒包含至少70重量%的苯乙烯类单体的聚合残基,所述成膜聚合物包含至少70重量%的丙烯酸类单体的聚合残基。
5.如权利要求4所述的组合物,其特征在于,所述聚合物颗粒与成膜聚合物的折射率之差至少为0.105。
6.一种膜,所述膜包含:具有以下性质的聚合物颗粒:(a)平均粒径为30-300纳米;(b)维氏标度硬度为100-700千克力/毫米2;以及Tg不高于80℃的连续聚合物相;其中,所述聚合物颗粒和所述连续聚合物相的折射率之差至少为0.04;所述聚合物颗粒之间的平均距离为35-400纳米。
7.如权利要求6所述的膜,其特征在于,所述聚合物颗粒与连续聚合物相的折射率之差至少为0.08,
平均粒径为70-200纳米。
8.如权利要求7所述的膜,其特征在于,所述聚合物颗粒之间的平均距离为50-200纳米。
9.如权利要求8所述的膜,其特征在于,所述聚合物颗粒包含至少70重量%的苯乙烯类单体的聚合残基,所述连续聚合物相包含至少70重量%的丙烯酸类单体的聚合残基。
10.如权利要求9所述的膜,其特征在于,所述聚合物颗粒与连续聚合物相的折射率之差至少为0.11。
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