CN101528868B - 具有优异热辐射性能的漆膜,及其形成方法 - Google Patents

具有优异热辐射性能的漆膜,及其形成方法 Download PDF

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CN101528868B
CN101528868B CN200780039362XA CN200780039362A CN101528868B CN 101528868 B CN101528868 B CN 101528868B CN 200780039362X A CN200780039362X A CN 200780039362XA CN 200780039362 A CN200780039362 A CN 200780039362A CN 101528868 B CN101528868 B CN 101528868B
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film layer
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八木信司
山本登司男
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Akzo Nobel Coatings International BV
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Abstract

为了提供具有优异热辐射性能和利用它可获得许多颜色且主要为浅色的漆膜。(解决方式)。采用具有优异热辐射性能的漆膜的形成方法,可形成具有优异的热辐射性能的漆膜,所述漆膜包括底涂漆膜层和面涂漆膜层,所述底涂漆膜层含有相对于漆膜的总固体分数,1-20质量%的炭黑,所述面涂漆膜层含有相对于漆膜的总固体分数,1-40质量%的珠光颜料且不含铝粉,和面涂漆膜层的漆膜厚度为11-50微米,其中施加含有相对于漆膜的总固体分数,1-20质量%的炭黑的底涂漆并硬化,和形成底涂漆膜层,然后在所述底涂漆膜层上施加含有相对于漆膜的总固体分数,1-40质量%的珠光颜料且不含铝粉的面涂漆并硬化,并形成漆膜厚度为11-50微米的面涂漆膜层。

Description

具有优异热辐射性能的漆膜,及其形成方法
[技术领域]
本发明涉及具有优异热辐射性能的漆膜及其形成方法。
[背景技术]
随着近年来家用电器的推广,产生的热量成为了问题,和采用个人计算机的情况下,当实现较高的性能时,CPU生成的热量的结果是所达到的温度上升。通常采用牵涉装配空气冷却风扇作为抵销措施的方法,但由于小型化,若可使用风扇的话,则风扇必须小,和即使不装配风扇,也希望具有冷却效果的外壳。作为控热的油漆组合物,特征在于包括成膜组分的控热目的的油漆组合物是已知的,所述油漆组合物包括选自有机基硅化合物中的不含硅烷醇基的至少一类化合物的高缩合物及其低缩合物,和以每100重量份所述成膜组分计,用量为100-300重量份的粒度不大于40微米的云母,和用量为50-200重量份的粒度不大于1微米的氧化钛(例如见专利文献1)。
然而,当这一油漆使用氧化钛和云母作为主要组分时,存在的问题是,它们不可能任选地着色。特别地,主要的弱点是,为了提供具有在家用电器领域中重要的颜色的设计特征,不可能实现黑色和闪光(glitter)的提供。此外,热辐射性能和电磁波吸收性能优良的油漆组合物的特征在于,它们含有以固体部分的质量%计,20-80%的铁酸盐(ferrite)粉末和3-60%的炭黑粉末,和其余包括树脂,其中油漆内铁酸盐粉末和炭黑粉末的用量使得30%□的铁酸盐粉末(%)+炭黑粉末(%)□90%被称为上漆金属片,所述上漆金属片具有优良的热辐射性能和电磁波吸收性能(例如,参见专利文献2)。
然而,弱点是,漆膜为黑色,因为添加了炭黑且它不可能被任选地着色。此外,具有有机涂层的热辐射性能和着色性能优良的上漆金属片已知作为其中在面漆内不使用炭黑的设备,所述有机涂层含有3-70质量%平均粒度为0.01-30微米、在金属片的至少一侧上厚度为至少1微米的氮化硼(例如,参见专利文献3)。然而,采用这一方法的情况下,通过仅仅面漆层提供热辐射性能,和当与具有两层结构的漆膜相比时,热辐射性能差。
此外,具有以下特征的热辐射表面处理过的材料是已知的,该特征是在基础材料表面上提供外层漆膜和内层漆膜,和内层漆膜含有相对于内部漆膜干燥质量,0.03-70质量%热反射率为至少70%的颜料,例如炭黑、氧化铝、氧化锆、氧化钛、二氧化硅、锆石、氧化镁或类似物(例如,参见专利文献4)。然而,采用这一方法的弱点在于,热辐射率因面漆膜而必然下降。
此外,以下树脂涂布的金属片已知作为具有优良热辐射性能以及抗划性和抗手指标记的树脂涂布的金属片,其中在一侧或两侧为黑色的着成黑色的金属片中的黑色着色表面的一个或两个上涂布含有白色颜料和/或闪光颜料的树脂漆膜,和所述树脂漆膜的厚度为0.5-10微米,而且,在所述树脂漆膜内包括的白色颜料和/或闪光颜料的用量总计为1-25质量%,和L值形式的颜色为44.0-60.0(例如,参见专利文献5)。然而,采用这一方法的情况下,第二层的膜厚不可能大,因此弱点在于不可能维持获得设计和多色所需的满意覆盖性能。
[专利文献1]日本已审专利公布H6-96682[专利文献2]日本未审专利申请特开2004-027064[专利文献3]日本未审专利申请特开2005-139535[专利文献4]日本未审专利申请特开2002-228085[专利文献5]日本未审专利申请特开2005-238769[发明内容]
[本发明要解决的技术问题]
本发明提供具有优异热辐射性能且还可具有许多颜色且主要为浅色体系的漆膜,和尤其本发明提供可赋予其闪烁感觉设计的预涂布的钢片的漆膜。
[解决这些问题的手段]
为了解决以上提及的问题,发明人进行了深入研究,结果发现,以特定用量包括的以特定组分列出的珠光颜料在面涂漆膜层中是理想的,并发现通过在底涂涂料膜层内包括特定量的炭黑并设定面涂漆层的厚度在规定的范围内,可实现所打算的目的,和本发明以这些发现为基础。
也就是说,本发明提供具有优良的热辐射性能的漆膜,它包括底涂涂料膜层和面涂漆膜层,所述底涂涂料膜层含有相对于漆膜的总固体分数,1-20质量%的炭黑,所述面涂漆膜层含有相对于漆膜的总固体分数,1-40质量%的珠光颜料且不含铝粉,和面涂漆膜层的漆膜厚度为11-50微米。此外,本发明提供具有优异热辐射性能的漆膜,其中在以上提及的漆膜内,珠光颜料是其中在二氧化钛上涂布薄板状云母粉末的颜料。
此外,本发明提供具有优异热辐射性能的漆膜,其中在以上提及的漆膜内,面涂漆膜层不含金属颜料和金属粉末。此外,本发明涉及上漆的金属片材,其中在金属片材的表面上形成以上提及的漆膜。此外,本发明提供形成具有优异热辐射性能的漆膜的方法,其中施加含有相对于漆膜的总固体分数,1-20质量%炭黑的底涂漆并硬化,和形成底涂漆膜层,然后在所述底涂漆膜层上施加含有相对于漆膜的总固体分数,1-40质量%珠光颜料且不含铝粉的面涂漆并硬化,和形成漆膜厚度为11-50微米的面涂漆膜层。
[发明效果]
采用本发明的漆膜,可获得优异的热辐射性能,可获得许多颜色且主要为浅色体系,和尤其该漆膜可理想地用作预涂布钢片目的的漆膜。
[具体实施方案]
在本发明的底涂涂料膜内包括相对于漆膜总的固体分数,用量为1-20质量%的炭黑。可通过这一方式改进漆膜的热辐射性能。对于炭黑来说,可没有限制地使用通常用作颜料的炭黑,和生产方法,例如槽法体系和炉法体系是已知的。商业炭黑的实例包括由Degussa Co.,生产的FW200,Colombia Carbon Co.生产的Rarben 1255和Mitsubishi Kagaku Co.生产的MA100。相对于漆膜总的固体分数,所包括的炭黑量优选为2-15质量%,和最理想地为3-12质量%。在炭黑含量小于1质量%的情况下,没有观察到热辐射效果,和在其中超过20质量%的那些情况下,油漆的触变性变高,和上漆的可操作性下降。
在底涂涂料膜层内包括的用于油漆目的的树脂应当是通常在预涂布的钢片用底涂涂料中使用的树脂,但优选环氧树脂和大分子聚酯树脂。可单独使用这些树脂之一,或者可使用两类或更多类。相对于漆膜的总固体分数,所包括的树脂量作为固体分数通常优选为50-80质量%和最理想地为60-75质量%。
从改进涂料组合物的耐腐蚀性的角度考虑,可将防锈颜料加入到底涂涂料膜层中。可使用已知的防锈颜料,和例如可使用磷酸基防锈颜料,例如磷酸锌、磷酸铁、磷酸铝、亚磷酸锌和类似物;钼酸基防锈颜料,例如钼酸钙、钼酸铝和钼酸钡,钒基防锈颜料,例如氧化钒,硅酸盐基颜料,例如硅酸钙,铬酸盐基防锈颜料,例如铬酸锶、铬酸锌、铬酸钙、铬酸钾和铬酸钡,微细分的二氧化硅,例如胶态二氧化硅和热解法二氧化硅,和铁合金,例如高硅铁。这些可单独使用或者可使用两类或更多类。相对于漆膜总的固体分数,防锈颜料的用量通常优选为5-25质量%,和最理想地为15-20质量%。
此外,考虑到遮盖基础材料,可在底涂漆膜层中使用通常在用于预涂布的钢片的底涂涂料中使用的有机或无机着色颜料,例如氧化钛、氧化铁和类似物。此外,考虑到提供抗划性和改进油漆的流度,可视需要使用真正的颜料。相对于漆膜总的固体分数,所包括的有机或无机着色颜料和/或真正的颜料的用量通常优选为0.5-15质量%,和最理想地为1-10质量%。底涂漆膜层的漆膜厚度优选为1-30微米,和最理想地为3-20微米。若它小于1微米,则得不到作为预涂布的钢片的耐腐蚀性和可操作性的基本功能,且也得不到满意的热辐射性能,和若它超过30微米,则上漆的可操作性下降。
相对于漆膜总的固体分数,可在本发明的面涂漆膜层内包括用量为1-40质量%的珠光颜料。按照这一方式,可显著改进漆膜的热辐射性能。相对于漆膜总的固体分数,所包括的珠光颜料的用量优选为2-35质量%,和最理想地为5-30质量%。若珠光颜料的含量小于1质量%,则观察不到对热辐射性能满意的影响,和若它超过40质量%,则当作为预涂布的钢片苛刻地操作时,出现漆膜剥离的可能性。
对珠光颜料没有强加特别限制,和实例包括其中在二氧化钛上涂布天然云母或人工云母的那些。珠光颜料的真实实例包括可商购的那些,例如Iriodin(商品名,由Merck Japan Co.生产)。可使用仅仅一类珠光颜料,或者可使用两类或更多类的混合物。
过去限制颜色,因为在面涂漆层内使用黑色颜料,例如炭黑,获得热辐射覆盖层,但在本发明中,对颜色基本上没有限制,和使用珠光颜料的结果是,可容易地获得所需颜色。此外,过去,铝粉用作闪烁材料用以赋予设计金属色,热辐射性能因此显著下降,但通过使用珠光颜料,可赋予热辐射性能和金属色设计两者。
也就是说,在本发明的面涂漆膜层内一定不包括铝,以避免热辐射性能下降。此外,从避免热辐射性能下降的角度考虑,在面涂漆膜内不包括除铝粉之外的金属颜料或金属粉末这一事实是理想的。而且,在其中必须使用金属颜料或金属粉末以赋予例如个人计算机外壳用上漆的金属片材导电性的那些情况下,根据本发明形成的漆膜应当在上漆的钢片表面上使用,和例如含有金属颜料或金属粉末的油漆应当在上漆的钢片相反侧上使用。
在面涂漆膜层内包括的用于油漆目的的树脂应当是通常在预涂布的钢片目的用面涂漆油漆中使用的树脂,和该树脂组分包括大分子聚酯树脂、聚酯树脂、丙烯酸类树脂、聚氨酯树脂、氟化树脂,和这些树脂的改性形式。此外,该树脂组分可与交联剂,例如丁基化三聚氰胺、甲基化三聚氰胺、混合丁基甲基三聚氰胺、脲树脂、异氰酸酯和类似物一起使用,所述交联剂将经历与树脂组分内包括的官能团交联反应。这些单一树脂和交联剂可单独使用或者可使用两类或更多类。相对于漆膜的总固体分数,所包括的树脂量通常优选为40-90质量%,和最理想地为50-85质量%。
因设计目的,可在面涂漆膜层内使用着色颜料和染料。对着色颜料没有强加特别的限制,和已知的无机、有机和复合无机/有机颜料全部可以使用。实际实例包括氧化钛、红色氧化铁(红赭石)、黄色氧化铁、花青蓝、花青绿、吡唑啉酮橙、偶氮颜料、普鲁士蓝和多环颜料,和可视需要使用炭黑。染料的实例包括靛类染料、硫化物染料、酞菁染料、二苯甲烷染料、硝基染料和吖啶染料。对颜料或染料的浓度没有强加特别的限制,和它可基于所要求的颜色和覆盖力来选择。
此外,真正的颜料,例如碳酸钙、滑石、石膏和粘土,有机交联微粒、无机微粒和类似物也可视需要包括在面漆膜层内。相对于漆膜总的固体分数,所包括的真正的颜料、有机交联颗粒、无机微粒和类似物的用量通常优选为0-20质量%,和最理想地为0-15质量%。
此外,可视需要在面漆膜层内例如包括诸如表面流平剂、紫外吸收剂、受阻胺类光稳定剂、粘度调节剂、硬化催化剂、颜料分散剂、颜料沉降抑制剂和色料分离抑制剂之类的添加剂。本发明的面涂漆膜层中漆膜的厚度优选为11-50微米,更理想地为12-40微米,和最理想地为13-30微米。小于11微米,则得不到满意的热辐射性能,和厚度超过50微米,则从经济的角度考虑,这是浪费的,而且,作为预涂布的钢片的可操作性不令人满意。
本发明的漆膜施加到其上的基础材料优选是金属,更理想地为金属片,和最理想地为预涂布的金属片。对金属片的类型没有强加特别的限制,但不锈钢片、电镀钢片和铝合金片是合适的。不锈钢片的实例包括铁素体不锈钢片、马丁体不锈钢片、奥氏体不锈钢片和类似物。铝合金片的实例包括JIS 1000基(纯Al基)片材、JIS 2000基(Al-Cu基)片材、JIS 3000基(Al-Mn基)片材、JIS 4000基(Al-Si基)片材、JIS 5000基(Al-Mg基)片材、JIS 6000基(Al-Mg-Si基)片材、JIS 7000基(Al-Zn基)片材和类似物。具有成本与性能平衡的电镀钢片尤其是理想的(ideal)金属片。电镀片材的实例包括镀锌钢片、锌-铁合金电镀钢片、锌-镍合金电镀钢片、锌-铬合金电镀钢片、锌-铝合金电镀钢片、镀铝钢片、锌-铝-镁合金电镀钢片、锌-铝-镁-硅合金电镀钢片、铝-硅合金电镀钢片、镀锌不锈钢片、镀铝不锈钢片和类似物。
可进行水洗、热水洗、酸洗、碱脱脂、粉碎、抛光和类似操作作为本发明中使用的金属片的涂布预处理,和可视需要进行单独一种这样的处理或者两种或更多种这种的处理的结合。应当合适地选择涂布预处理条件。可视需要在金属片上进行化学成形处理。化学成形处理是增强涂层与底下的金属片之间粘合性且考虑到改进耐腐蚀性而进行的处理。例如在化学成形处理当中包括已知的技术,例如磷酸锌处理、铬酸盐处理、硅烷偶联剂处理、复合氧化物成膜处理、非铬酸盐处理、鞣酸处理、氧化钛处理、氧化锆处理和这些处理的结合。
可使用各种方法,使具有本发明优良热辐射性能的漆膜成形,但优选以下形成漆膜的方法,其中施加相对于漆膜总的固体分数,含有1-20质量%炭黑的底涂漆并硬化,形成底涂漆膜层,然后在所述底涂漆膜层上形成相对于漆膜总的固体分数,含有1-40质量%珠光颜料且不含铝的面涂漆并硬化,形成漆膜厚度为11-50微米的面涂漆膜层。
在以上提及的底涂漆膜层内包括的组分应当包括在该底涂漆内,和此外,可另外包括有机溶剂作为稀释剂。在以上提及的面涂漆膜层内包括的组分应当包括在面漆内,和此外,可另外包括有机溶剂作为稀释剂。
通常在油漆中使用的各种有机溶剂可用作该有机溶剂,和实例包括芳烃基溶剂,例如甲苯、二甲苯、乙苯和芳族石脑油、脂环烃基溶剂,例如环己烷和乙基环己烷,酮基溶剂,例如丙酮、甲乙酮、甲基异丁基酮、环己酮和异佛尔酮,醇基溶剂,例如正丁醇和异丁醇,酯基溶剂,例如乙酸乙酯、乙酸正丁酯、乙酸异丁酯、乙酸3-甲氧基丁酯和己二酸二(2-乙基己酯),醚基溶剂,例如二丁醚、四氢呋喃、1,4-二噁烷,和1,3,5-三噁烷,和含氮溶剂,例如乙腈、戊腈、N,N-二甲基甲酰胺和N,N-二乙基甲酰胺。可单独使用这些有机溶剂之一,或者可使用含两类或更多类溶剂的溶剂混合物。此外,在油漆内包括的有机溶剂量优选为30-80质量%,和最理想地为40-65质量%。
可采用预涂布钢片常用的方法施加本发明中使用的底涂漆和面涂漆。例如,可使用棒涂器、辊涂器、溢流涂布器、狭缝幕涂器、辊幕涂器、T-模头、多层幕涂器或这些类似的涂布器,施加它们。
在本发明中使用的底涂漆和面涂漆硬化以及形成漆膜的方法中,硬化方法例如通过采用热通风加热、高频诱导加热或类似加热方法加热和干燥而硬化,或者根据情况,通过用电子束或紫外辐射线辐照而硬化,和应当选择对于所使用的油漆来说合适的方法。应当在金属片的至少一侧上形成本发明的漆膜。此外,以标准形式建立具有以两层在金属片表面上形成的底涂漆膜和在这一底涂漆膜层上形成的面涂漆膜层的本发明漆膜,但当在一侧上存在大于两层时,则可在底涂漆膜层下方引入一层相同的底涂漆膜层或不同的底涂漆膜层,而且可在面漆膜层上形成与面涂漆膜层相同的另一层。
[例举的实施例]
以下通过例举的实施例更详细地描述本发明,但本发明不限于这些例举的实施例。
(制备底涂漆)<生产实施例1:生产底涂漆A-1>其中以40质量%的额定值(rate),在含Sorbesso 150(商品名,和通过Exxon Chemical Co.生产的芳族溶剂)和环己酮的50/50混合物的溶剂内溶解聚酯树脂Vylon 290(商品名,由Toyo Boseki Co.生产)得到的溶液(60质量份),3质量份氧化钛,2.5质量份炭黑,6.5质量份K-White 105(商品名,白色防锈颜料,由Teika Co.生产),11质量份Sorbesso 150和11质量份环己酮引入到容器内,并在砂磨机内分散,其方式使得粒度为小于或等于20微米,然后在搅拌下,逐渐添加4质量份Cymel 303(商品名,由Nihon Cytec Industries Co.生产的三聚氰胺树脂,固体分数为100质量%),1质量份Catalyst602(商品名,由Nihon Cytec Industries Co.生产的酸催化剂)和1质量份表面控制剂,提供均匀混合物,并获得底涂漆A-1。
<生产实施例2和3>使用与生产实施例1相同的方法,采用表1所示的配方,生产底涂漆A-2和A-3。
(面涂漆的生产)<生产实施例4:面涂漆B-1的生产>其中以40质量%的额定值(rate),在含Sorbesso 150(商品名,和通过Exxon Chemical Co.生产的芳族溶剂)和环己酮的50/50混合物的溶剂内溶解聚酯树脂Vylon 240(商品名,由Toyo Boseki Co.生产)得到的溶液(75质量份)引入到容器内,并在单独的容器内,将通过用7.5质量份Sorbesso 150和7.5质量份环己酮润湿6质量份Iriodin 103WNT(商品名,由Merck Japan Co.生产的珠光颜料)获得的糊剂在搅拌下,逐渐加入其中,提供均匀的混合物。然后在搅拌下,逐渐添加2质量份Cymel 303(商品名,由Nihon Cytec Industries Co.生产的三聚氰胺树脂,固体分数为100质量%),1质量份Catalyst602(商品名,由Nihon Cytec Industries Co.生产的酸催化剂)和1质量份表面控制剂,提供均匀的混合物,并获得面涂漆B-1。
<生产实施例5>其中以40质量%的额定值(rate),在含Sorbesso 150(商品名,和通过Exxon Chemical Co.生产的芳族溶剂)和环己酮的50/50混合物的溶剂内溶解聚酯树脂Vylon 240(商品名,由Toyo Boseki Co.生产)得到的溶液(50质量份),3.8质量份氧化钛,0.2质量份红色氧化铁,2.5质量份Sorbesso 150和2.5质量份环己酮引入到容器内,并在砂磨机内分散,其方式使得粒度小于或等于10微米,并在单独的容器内,将通过用5质量份Sorbesso 150和5质量份环己酮润湿2质量份Iriodin 103WNT(商品名,由Merck Japan Co.生产的珠光颜料)获得的糊剂在搅拌下,逐渐加入其中,提供均匀的混合物。然后在搅拌下,逐渐添加25质量份以上提及的Vylon 240 40质量%溶液,2质量份Cymel 303(商品名,由Nihon Cytec Industries Co.生产的三聚氰胺树脂,固体分数为100质量%),1质量份Catalyst 602(商品名,由Nihon Cytec Industries Co.生产的酸催化剂)和1质量份表面控制剂,提供均匀的混合物,并获得面涂漆B-2。
<生产实施例6-8>使用与生产实施例4或5相同的方法,采用表2所示的配方,生产面漆B-3-B-5。
(实施例1)采用棒涂器,油漆底涂漆A-1,其方式使得在片材厚度为0.4mm的电镀锌的钢片(粘合的镀锌量为20g/m2)上干燥漆膜厚度为10微米,其中所述钢片进行过碱脱脂处理和铬酸盐处理,然后在热通风加热烘箱内在260℃的条件下烘烤60秒,以便最高片材温度(PMT)为230℃并硬化。然后,采用棒涂器,油漆面涂漆B-1,其方式使得干燥漆膜厚度为15微米,并在热通风加热烘箱内,在260℃的条件下烘烤60秒,以便最高片材温度(PMT)为230℃并硬化,产生试验片材,和对其进行测试。表3中示出了评价结果。
(实施例2-5,对比例1-8)以与实施例1相同的方式制备试验片材,并进行测试。表3示出了实施例2-5的评价结果,和在表4中示出了对比例1-8的评价结果。
<试验评价方法>评价已制备的上漆过的金属片材所使用的方法如下所述。评价采用着色颜料着色是否容易。由改变氧化钛和红色氧化铁为花青蓝并仅仅分散花青蓝,通过采用生产实施例5所述的用于面涂漆的方法,制备蓝色油漆,进行评价。添加用量为0.2质量%的这一油漆到面涂漆B-1-B-7中,并肉眼评估是否存在变蓝。基于下述标准进行评估:○:蓝色明显可见□:蓝色不容易观察到,但可辨别×:蓝色不可能观察到。
热辐射性能通过测量辐射率,进行热辐射性能的评价。采用D&S AERD热辐射仪(由Kyoto Denshi Co.生产),通过在固定量的加热下辐照样品,测量样品的升温,从而测量辐射率。基于下述标准进行辐射率的评估:○:热辐射率为至少0.85□:热辐射率至少0.7但小于0.85×:热辐射率小于0.7。
可操作性采用与样品相同的上漆过的片材之一,在内部夹持在室温下切割成宽度5cm的试样,并在外侧上采用漆膜进行180°粘合试验。通过采用10倍放大的玻璃观察末端部分,进行评估,和基于下述标准进行评估:○:没有龟裂□:龟裂小于20%×:龟裂大于或等于20%。
表1
Figure G200780039362XD00121
在该表中,*具有以下所示的含义。*1:Miki Leveling MK Conc(由Kyoeisha Kagaku Co.生产)
表2
Figure G200780039362XD00131
在该表中,*具有以下所示的含义。*1:Miki Leveling MK Conc(由Kyoeisha Kagaku Co.生产)*2:铝粉(65%质量,由Toyo Aluminum Co.生产)
表3
Figure G200780039362XD00132
表4
Figure G200780039362XD00141

Claims (5)

1.具有优异的热辐射性能的漆膜,它包括底涂漆膜层和面涂漆膜层,所述底涂漆膜层含有相对于漆膜的总固体分数,1-20质量%的炭黑,所述面涂漆膜层含有相对于漆膜的总固体分数,1-40质量%的珠光颜料且不含铝粉,和面涂漆膜层的漆膜厚度为11-50微米,其中底涂漆膜层的漆膜厚度为1-30微米。
2.权利要求1的具有优异的热辐射性能的漆膜,其中珠光颜料是其中在二氧化钛上涂布的薄片状云母粉末的颜料。
3.权利要求1或2的具有优异的热辐射性能的漆膜,其中面涂漆膜层不含金属颜料和金属粉末。
4.一种上漆过的金属片材,其中在金属片材的表面上形成权利要求1-3任何一项的漆膜。
5.形成具有优异的热辐射性能的漆膜的方法,其中施加含有相对于漆膜的总固体分数,1-20质量%的炭黑的底涂漆并硬化,和形成底涂漆膜层,然后在所述底涂漆膜层上施加含有相对于漆膜的总固体分数,1-40质量%的珠光颜料且不含铝粉的面涂漆并硬化,和形成漆膜厚度为11-50微米的面涂漆膜层,其中底涂漆膜层的漆膜厚度为1-30微米。
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