CN110922885A - 一种银幕涂料 - Google Patents
一种银幕涂料 Download PDFInfo
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Abstract
本发明涉及一种银幕涂料,其按质量份的组成为:丙烯酸酯10‑25重量份,环氧树脂10‑25重量份,活性稀释剂20‑50重量份,铝银粉20‑30重量份,散射粒子0.5‑5重量份,铝银粉定向剂0.1‑5重量份,流平剂0.1‑5重量份,消泡剂0.1‑3重量份,阻聚剂0.1‑3重量份,光引发剂0.1‑5重量份。本发明相较于现有的银幕涂料,无需添加任何有机挥发性溶剂,大大减小了传统银幕涂料有机挥发溶剂对环境和人身安全的危害,符合目前环保涂料的发展趋势,具有广阔的应用前景。
Description
技术领域
本发明涉及一种银幕涂料,特别是涉及一种无溶剂型环保银幕涂料,属于涂料制造技术领域。
背景技术
随着人们生活水平的日益提高,越来越多的观众走进电影院,并随之对观影过程中的感受提出了越来越高的要求。金属银幕是一种在幕布基材上涂覆有一层金属粒子的反射型屏幕,因其可以提供优质的光学效果而备受欢迎。与塑料及玻璃银幕相比,金属银幕具有高增益,大视角、高对比度、优异色彩还原性、基体薄而柔软、易维护、寿命长等特点。同时,金属银幕也是3D观影场景中优选的屏幕类型。
目前银幕的制作一般是通过将溶剂型铝银浆涂料喷涂于基体上,在经过干燥后所得,这种制作方法需要用到大量的挥发性溶剂,生产过程中会产生大量有机气体的排放,严重威胁着工作人员的健康且会对环境造成污染,同时干燥过程一般需要几天,时间成本也比较高。随着人们环保意识的不断增强和对健康的愈加关注,环保型的生产方式逐渐成为主流,因此如何开发出一种能够替代溶剂型铝银浆的环保型铝银浆成为亟待解决的问题。
发明内容
本发明所要解决的技术问题在于针对现有技术的不足,提供一种银幕涂料,其特征在于,所述银幕涂料包含以下重量份的组份:
其中,所述活性稀释剂为甲基丙烯酸酯类化合物。
进一步所述丙烯酸酯为聚氨酯丙烯酸酯、聚酯丙烯酸酯、聚醚丙烯酸酯或环氧丙烯酸酯树脂中的一种或多种。
进一步所述环氧树脂为缩水甘油醚类环氧树脂、缩水甘油酯类环氧树脂或缩水甘油胺类环氧树脂中的一种或多种。
进一步所述活性稀释剂为甲基丙烯酸甲酯、丙烯酸丁酯、丙烯酸异癸酯、丙烯酸十二酯、丙烯酸月桂酯、丙烯酸异辛酯、三羟甲基丙烷三丙烯酸酯、三羟甲基丙烷三甲基丙烯酸酯、季戊四醇三丙烯酸酯或己二醇二丙烯酸酯中的一种或多种。
进一步所述铝银粉为浮型或非浮型,所述铝银粉的粒径为1μm-50μm;
优选的,所述铝银粉的粒径为2μm-20μm。
进一步所述散射粒子为纳米二氧化钛、纳米二氧化硅或超微细碳酸钙中的一种或多种。
进一步所述铝银粉定向剂为醋酸纤维素;
所述流平剂为有机硅流平剂或氟碳流平剂;
所述消泡剂为乙醇、正丁醇、有机硅酯、矿物油或卵磷脂中的一种或多种;
所述阻聚剂为吩噻嗪、对羟基苯甲醚、对苯二酚、苯基萘胺或对叔丁基邻苯二酚中的一种或多种。
进一步所述光引发剂为在360nm-780nm的光辐射下具有活性。
进一步所述光引发剂为樟脑醌、氟化二苯基二茂钛、双(五氟化苯基)二茂钛、二芳基碘鎓盐、三芳基碘鎓盐、烷基碘鎓盐或异丙苯茂铁六氟磷酸盐中的一种或几种。
本发明相较于现有的银幕涂料,无需添加任何有机挥发性溶剂,大大减小了传统银幕涂料有机挥发溶剂对环境和人身安全的危害,符合目前环保涂料的发展趋势,具有广阔的应用前景,另外本发明通过创新性的添加醋酸纤维素作为铝银粉定向剂,来提高铝银粉的排列取向,使得银幕的光反射角度在一定范围呈现高斯分布,进一步提高银幕的亮度增益。
具体实施方式
本发明提供一种银幕涂料,包含以下重量份的组份:
本发明所有原料,对其来源没有特别限制,在市场上购买的或按照本领域技术人员熟知的常规方法制备的即可。
本发明相较于本发明相较于现有的银幕涂料,无需添加任何有机挥发性溶剂,大大减小了传统银幕涂料有机挥发溶剂对环境和人身安全的危害。
所述丙烯酸酯为聚氨酯丙烯酸酯、聚酯丙烯酸酯、聚醚丙烯酸酯、环氧丙烯酸酯树脂中的一种或多种,丙烯酸酯为成膜材料,对铝银粉有较好附着力,可进一步增加涂料在银幕上的附着力。
所述环氧树脂为缩水甘油醚类环氧树脂、缩水甘油酯类环氧树脂、缩水甘油胺类环氧树脂中的一种或多种,环氧树脂为成膜材料,并具有较好的柔韧性,可进一步增加银幕的抗弯折力,实现银幕折叠运输。
所述活性稀释剂为甲基丙烯酸酯类化合物,具体可为甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、丙烯酸异癸酯(IDA)、丙烯酸十二酯、丙烯酸月桂酯(LA)、丙烯酸异辛酯(EHA)、三羟甲基丙烷三丙烯酸酯(TMPTA)、三羟甲基丙烷三甲基丙烯酸酯(TMPTMA)、季戊四醇三丙烯酸酯(PETA)或己二醇二丙烯酸酯(HDDA)中的一种或多种。所述活性稀释剂用于调节银幕涂料的粘度,便于后续的研磨;所述活性稀释剂又称反应性溶剂,其作为溶解或分散成膜材料,又能在涂料成膜过程中参与成膜反应,形成不挥发组份而留在涂膜中的一类化合物,活性稀释剂可以参加环氧树脂的固化反应,成为环氧树脂固化物的交联网络结构的一部分。
所述铝银粉可以为浮型或非浮型。所述铝银粉为片状,粒径为1μm-50μm,优选为1μm-20μm,进一步优选为2μm-20μm,更优选为2μm-10μm;所述铝银粉用于对光线进行反射,可提高银幕的光利用率,进一步提高银幕的光增益。
其中所述浮型铝银粉为漂浮型的鳞片状结构,浮于银幕的涂层表面;铝银粉为非浮型铝银粉时,非浮型铝银粉可均匀、平行地分布在整个银幕涂层中,由于树脂材料包覆,因此具有良好的抗氧化性、耐酸碱及耐磨性。
所述散射粒子为纳米二氧化钛、纳米二氧化硅、超微细碳酸钙中的一种或多种,所述散射粒子可提高光的均匀度,进一步提高银幕的可视角。
所述铝银粉定向剂为醋酸纤维素,可用于提高铝银粉的排列取向。传统的溶剂型银幕涂料在喷涂到银幕上之后,通过溶剂挥发成膜,溶剂挥发过程中产生的压力可以将膜层中的铝银粉挤压至规则排列取向,从而获得理想的窄视角,进一步提高银幕的增益。本发明通过添加醋酸纤维素作为铝银粉定向剂,来提高铝银粉的排列取向,以弥补未添加挥发溶剂引发的铝银粉不规则排列问题,使得银幕的光反射角度在一定范围呈现高斯分布,进一步提高银幕的亮度增益。
所述流平剂为有机硅流平剂或氟碳流平剂,所述流平剂可有效减小涂料的表面张力,使得涂料在成膜过程中形成一个平整、光滑、均匀的膜层。
所述消泡剂为乙醇、正丁醇、有机硅酯、矿物油、卵磷脂中的一种或多种,所述消泡剂能有效降低接触点的表面张力以破坏泡膜,产生消泡的效果。
所述阻聚剂为吩噻嗪、对羟基苯甲醚、对苯二酚、苯基萘胺、对叔丁基邻苯二酚中的一种或多种,所述阻聚剂可防止烯类单体的自由基发生聚合反应。
所述光引发剂为在360nm-780nm的光辐射下具有活性的化合物,所述化合物为樟脑醌(CQ)、氟化二苯基二茂钛(Irgacure 784)、双(五氟化苯基)二茂钛、二芳基碘鎓盐、三芳基碘鎓盐、烷基碘鎓盐、异丙苯茂铁六氟磷酸盐中的一种或几种,所述光引发剂用于吸收可见光波段的能量,以引发单体聚合交联固化。
本发明还提供一种如上所述的银幕涂料的制备方法,所述制备方法为:将如上所述的丙烯酸酯、环氧树脂、活性稀释剂、铝银粉、散射粒子、铝银粉定向剂、流平剂、消泡剂以及阻聚剂混合均匀后形成混合浆料,所述混合浆料可以在常温下储存待用;涂覆前,将所述混合浆料与光引发剂混合,形成无溶剂型环保银幕涂料。
若光引发剂添加过早可能会发生因避光不好而导致的涂料失效,在上料前加入光引发剂能够减小工艺风险。需要注意的是,加入光引发剂的过程中需要注意避光。
本发明还提供一种银幕的制备方法,所述制备方法包含:对银幕基材进行清洁处理;将无溶剂型环保银幕涂料涂覆在银幕基材后静置、流平及消泡;利用光固化银幕涂料;用溶剂清洗固化后的银幕涂料,除去表面未固化单体,常温干燥后成品。
具体地,将银幕涂料涂覆在银幕基材上可以采用喷涂、滚涂、刮涂、丝网印刷等方式。银幕涂料涂覆在银幕基材后的静置时间优选为30min-120min。所述光源优选为蓝色线性光源或者蓝紫色线性光源,光源固化时优选匀速运动辐照银幕涂料。
下面结合具体实施例对本发明进行详细介绍。
实施例一
将聚氨酯丙烯酸酯20重量份、缩水甘油醚类环氧树脂20重量份、己二醇二丙烯酸酯20重量份,1μm粒径大小的片状铝银粉20重量份、纳米二氧化钛2重量份,有机硅流平剂1重量份,醋酸纤维素1.5重量份,卵磷脂1.2重量份,对苯二酚1重量份按顺序依次加入到反应容器中,机械搅拌均匀待用。
取上述混合物树脂,加入1.5重量份光引发剂樟脑醌,避光下混合均匀。
以PET膜为基材,清洁完成后,将上述涂料通过丝网印刷方式均匀涂布其上,静置80min,采用445nm蓝色激光光源辐照涂膜直至固化成型,少量溶剂清洗,干燥后成品。
实施例二
将聚酯丙烯酸酯25重量份、缩水甘油胺类环氧树脂15重量份、己二醇二丙烯酸酯25重量份,10μm粒径大小的片状铝银粉23重量份、纳米二氧化硅3重量份,有机硅流平剂1.5重量份,醋酸纤维素1.5重量份,卵磷脂1.2重量份,对苯二酚1重量份按顺序依次加入到反应容器中,机械搅拌均匀待用。
取上述混合物树脂,加入3重量份光引发剂氟化二苯基二茂钛,避光下混合均匀。
以PET膜为基材,清洁完成后,将上述涂料通过刮涂方式均匀涂布其上,静置60min,采用405nm蓝紫色光源辐照涂膜直至固化成型,少量溶剂清洗,干燥后成品。
实施例三
将聚氨酯丙烯酸酯10重量份、缩水甘油醚类环氧树脂10重量份、己二醇二丙烯酸酯50重量份,5μm粒径大小的片状铝银粉25重量份、纳米二氧化钛2重量份,有机硅流平剂1重量份,醋酸纤维素1.5重量份,卵磷脂1.2重量份,对苯二酚1重量份按顺序依次加入到反应容器中,机械搅拌均匀待用。
取上述混合物树脂,加入2重量份光引发剂樟脑醌,避光下混合均匀。
以PET膜为基材,清洁完成后,将上述涂料通过喷涂方式均匀涂布其上,静置30min,采用445nm蓝色光源辐照涂膜直至固化成型,少量溶剂清洗,干燥后成品。
实施例四
将聚醚丙烯酸酯10重量份、缩水甘油胺类环氧树脂10重量份、甲基丙烯酸甲酯20重量份,20μm粒径大小的片状铝银粉20重量份、超微细碳酸钙0.5重量份,氟碳流平剂0.1重量份,醋酸纤维素0.1重量份,有机硅酯0.1重量份,吩噻嗪0.1重量份按顺序依次加入到反应容器中,机械搅拌均匀待用。
取上述混合物树脂,加入0.1重量份光引发剂二芳基碘鎓盐,避光下混合均匀。
以PET膜为基材,清洁完成后,将上述涂料通过滚涂方式均匀涂布其上,静置30min,采用445nm蓝色光源辐照涂膜直至固化成型,少量溶剂清洗,干燥后成品。
实施例五
将环氧丙烯酸酯树脂25重量份、缩水甘油胺类环氧树脂25重量份、丙烯酸异辛酯50重量份,50μm粒径大小的片状铝银粉30重量份、超微细碳酸钙5重量份,氟碳流平剂5重量份,醋酸纤维素5重量份,乙醇3重量份,对羟基苯甲醚3重量份按顺序依次加入到反应容器中,机械搅拌均匀待用。
取上述混合物树脂,加入5重量份光引发剂烷基碘鎓盐,避光下混合均匀。
以PET膜为基材,清洁完成后,将上述涂料通过丝网印刷方式均匀涂布其上,静置120min,采用405nm蓝紫色光源辐照涂膜直至固化成型,少量溶剂清洗,干燥后成品。
综上所述,本发明银幕涂料由丙烯酸酯、环氧树脂、活性稀释剂、铝银粉、散射粒子、铝银粉定向剂、流平剂、消泡剂、阻聚剂、光引发剂等主要组份组成,无需任何挥发性溶剂,在可见激光的辐照下即可快速固化成膜,所成形金属膜对基材附着力好,光学效果优异,且制备工艺简单,固化工艺环保。
Claims (10)
2.如权利要求1所述的银幕涂料,其特征在于,所述丙烯酸酯为聚氨酯丙烯酸酯、聚酯丙烯酸酯、聚醚丙烯酸酯或环氧丙烯酸酯树脂中的一种或多种。
3.如权利要求1所述的银幕涂料,其特征在于,所述环氧树脂为缩水甘油醚类环氧树脂、缩水甘油酯类环氧树脂或缩水甘油胺类环氧树脂中的一种或多种。
4.如权利要求1所述的银幕涂料,其特征在于,所述活性稀释剂为甲基丙烯酸甲酯、丙烯酸丁酯、丙烯酸异癸酯、丙烯酸十二酯、丙烯酸月桂酯、丙烯酸异辛酯、三羟甲基丙烷三丙烯酸酯、三羟甲基丙烷三甲基丙烯酸酯、季戊四醇三丙烯酸酯或己二醇二丙烯酸酯中的一种或多种。
5.如权利要求1所述的银幕涂料,其特征在于,所述铝银粉为浮型或非浮型,所述铝银粉的粒径为1μm-50μm。
6.如权利要求5所述的银幕涂料,其特征在于,所述铝银粉的粒径为2μm-20μm。
7.如权利要求1所述的银幕涂料,其特征在于,所述散射粒子为纳米二氧化钛、纳米二氧化硅或超微细碳酸钙中的一种或多种。
8.如权利要求1所述的银幕涂料,其特征在于,所述铝银粉定向剂为醋酸纤维素;
所述流平剂为有机硅流平剂或氟碳流平剂;
所述消泡剂为乙醇、正丁醇、有机硅酯、矿物油或卵磷脂中的一种或多种;
所述阻聚剂为吩噻嗪、对羟基苯甲醚、对苯二酚、苯基萘胺或对叔丁基邻苯二酚中的一种或多种。
9.如权利要求1所述的银幕涂料,其特征在于,所述光引发剂在360nm-780nm的光辐射下具有活性。
10.如权利要求9所述的银幕涂料,其特征在于,所述光引发剂为樟脑醌、氟化二苯基二茂钛、双(五氟化苯基)二茂钛、二芳基碘鎓盐、三芳基碘鎓盐、烷基碘鎓盐或异丙苯茂铁六氟磷酸盐中的一种或几种。
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