CN1993424A - 光反射体用聚酯树脂组合物 - Google Patents
光反射体用聚酯树脂组合物 Download PDFInfo
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- CN1993424A CN1993424A CNA2005800268086A CN200580026808A CN1993424A CN 1993424 A CN1993424 A CN 1993424A CN A2005800268086 A CNA2005800268086 A CN A2005800268086A CN 200580026808 A CN200580026808 A CN 200580026808A CN 1993424 A CN1993424 A CN 1993424A
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Abstract
本发明提供一种聚酯树脂组合物,其含有30~80重量%的聚对苯二甲酸丁二醇酯树脂(A)、10~40重量%的聚对苯二甲酸乙二醇酯树脂(B)、0.1~40重量%的平均粒径1.5μm以下的烧成高岭土(C)、0.1~40重量%的球状无机填充材料(D),该聚酯树脂组合物具有优异的金属直接蒸镀性,在其成型品的表面的一部分或全体上形成有金属蒸镀膜的光反射体具有高亮度感,进而也没有发现高温暴露后的模糊导致的亮度感下降,因此可以适合用作汽车用灯的罩、反射镜、附加部分、家电照明器具等。
Description
技术领域
本发明涉及一种在光反射体的制造中所使用的聚酯树脂组合物;和一种光反射体,其是通过在对上述聚酯树脂组合物进行成型而获得的成型品的表面的一部分或全体上形成金属蒸镀膜、使该金属蒸镀膜与该成型品的表面接合而获得的。
背景技术
目前,作为汽车用灯的罩、反射镜、附加部分(extension)、家电照明器具等的光反射体,一直使用金属制(板金)、对以团状模塑料(BMC)、片状模塑料(SMC)为代表的热固化性树脂进行金属镀敷加工或蒸镀或涂装了金属薄膜而成的制品。金属制反射体的加工性差,很重,存在操作困难的缺点,另一方面,对热固化性树脂成型品进行了金属镀敷加工或蒸镀了金属薄膜而得到的反射板,具有以耐热性、刚性、尺寸稳定性为代表的优异的特性,但是存在下述问题:成型周期长,成型时产生毛刺、或者在成型时单体挥发,使操作环境恶化。因此,逐渐成为主流的是,没有这样的问题,并且伴随这些光反射体的高机能化、设计的多样化,生产率优异的热塑性树脂上蒸镀了金属薄膜的制品。
作为这样的光反射体的制造方法,可以列举出,为了在成为光反射面的地方赋予表面平滑性,在进行底漆处理后蒸镀金属,进而涂布面漆的方法。但是,上述涂布底漆的现有的方法中,由于在底漆中使用有机溶剂,所以在环境方面是不理想的,进而,由于上述有机溶剂的挥发和涂膜的固化需要时间,因此存在镀敷加工、蒸镀所需要的费用高,总成本高的问题。因此,要求不需要前加工、可以低成本地制造的可以使用金属直接蒸镀法的光反射体用热塑性树脂组合物。
为了适应这样的光反射体用热塑性树脂组合物的要求,在专利文献1中,提出了在聚对苯二甲酸丁二醇酯中配合聚碳酸酯和微粉填料的树脂组合物的方案。另外,在专利文献2中,提出了在含有聚对苯二甲酸亚烷基酯类树脂和硅油的树脂组合物中使用微粉填料作为强化材料的方法。另外,在专利文献3中,提出了在含有微粉填料的聚对苯二甲酸丁二醇酯或共聚酯中设置反射金属层而成的光反射体。
但是,在使用专利文献1中记载的树脂组合物的情况下,脱模性差,成型高周期性差,并且在成型品的表面的一部分或全体上形成了金属蒸镀膜的光反射体被进行了高温暴露的情况下,亮度感低下。另外,在使用了专利文献2中记载的树脂组合物的情况下,刚性不充分,另外,在成型品表面不使用底漆的情况下,不一定能满足在成型品的表面的一部分或全体上形成了金属蒸镀膜的光反射体的亮度感。在专利文献3记载的光反射体中,在形成了金属直接蒸镀膜的情况下,光反射体的亮度感不充分。
专利文献1:特开平11-101905号公报
专利文献2:特开平11-61382号公报
专利文献3:美国专利第4429004号说明书
发明内容
本发明的课题在于,提供一种可以制造金属直接蒸镀性、表面平滑性、冲击性、脱模性优异的成型品的聚酯树脂组合物,和在该聚酯树脂组合物的成型品上形成了金属蒸镀膜的亮度感优异的光反射体。
本发明者们进行了深入研究,结果发现,通过使用以特定的比例含有聚对苯二甲酸丁二醇酯树脂、聚对苯二甲酸乙二醇酯树脂、烧成高岭土、球状无机填充材料的聚酯树脂组合物,可以解决上述课题,从而完成了本发明。
即,本发明提供:
(1)一种聚酯树脂组合物,以聚酯树脂组合物总量为100重量%计,含有30~80重量%的聚对苯二甲酸丁二醇酯树脂(A)、10~40重量%的聚对苯二甲酸乙二醇酯树脂(B)、0.1~40重量%的平均粒径1.5μm以下的烧成高岭土(C)、0.1~40重量%的球状无机填充材料(D);
(2)如(1)所述的聚酯树脂组合物,使用ISO3274规定的中心线平均粗糙度1.0nm的镜面模具制造出的成型品表面的中心线平均粗糙度为5.0~20.0nm;
(3)如(1)或(2)所述的聚酯树脂组合物,球状无机填充材料(D)为硫酸钡(D-1)和/或二氧化钛(D-2);
(4)如(1)~(3)的任一项所述的聚酯树脂组合物,平均粒径为1.5μm以下的烧成高岭土(C)是经过表面处理的;
(5)如(1)~(4)的任一项所述的聚酯树脂组合物,以聚酯树脂组合物总量为100重量%计,含有0.001~5.0重量%的脱模剂(E);
(6)如(5)所述的聚酯树脂组合物,脱模剂(E)为褐煤酸复合酯蜡;
(7)一种光反射体,在使用(1)~(6)的任一项的聚酯树脂组合物制造出的成型品的表面的一部分或全体上形成有金属蒸镀膜,该金属蒸镀膜与该成型品的表面接合。
本发明的聚酯树脂组合物可以提供金属直接蒸镀性优异、表面平滑性所代表的表面外观良好的成型品。另外,本发明的聚酯树脂组合物成型所获得的成型品的表面的一部分或全体上形成了金属蒸镀膜、该金属蒸镀膜与该成型品的表面接合的光反射体,具有高亮度感,进而高温暴露后的模糊(blur)导致的亮度感低下显著变少。并且,上述的光反射体,可以优选用作汽车用灯的罩、反射镜、附加部分、家电照明器具等。
具体实施方式
下面,详细说明本发明。
构成本发明的所谓的聚对苯二甲酸丁二醇酯树脂(A),是利用以对苯二甲酸或其酯形成性衍生物和1,4-丁二醇或其酯形成性衍生物为主成分进行缩聚反应等的通常的聚合方法获得的聚合物,可以含有不损坏特性的范围的例如20重量%左右以下的其他共聚成分。作为这些(共)聚合物的优选例,可以列举出,聚对苯二甲酸丁二醇酯、聚(对苯二甲酸/间苯二甲酸)丁二醇酯、聚(对苯二甲酸/己二酸)丁二醇酯、聚(对苯二甲酸/癸二酸)丁二醇酯、聚(对苯二甲酸/癸烷二甲酸)丁二醇酯、聚(对苯二甲酸/萘二甲酸)丁二醇酯、聚对苯二甲酸(丁二醇/乙二醇)酯等,它们可以单独使用,也可以混合2种以上。
本发明中使用的聚对苯二甲酸丁二醇酯树脂(A),优选为在25℃测定邻氯苯酚溶液时的特性粘度为0.36~1.60,特别优选在0.52~1.25的范围内。当特性粘度小于0.36时,机械特性变得不好,另一方面,当特性粘度超过1.60时,成型性有变得不良的倾向。
本发明中的聚对苯二甲酸丁二醇酯树脂(A)的配合量,优选为聚酯树脂组合物全体的30~80重量%,更优选为35~75重量%,进一步优选为45~70重量%。如果聚对苯二甲酸丁二醇酯(A)的配合量少于30重量%,则树脂组合物的注射成型时的脱模性差,成型高周期性差,当超过80重量%时,树脂组合物的表面外观有容易变差的倾向。
构成本发明的所谓的聚对苯二甲酸乙二醇酯树脂(B),是利用以对苯二甲酸或其酯形成性衍生物和乙二醇或其酯形成性衍生物为主成分进行缩聚反应等的通常的聚合方法获得的聚合物,可以含有不损坏特性的范围的例如20重量%左右以下的其他共聚成分。作为这些(共)聚合物的优选例,可以列举出,聚(对苯二甲酸/间苯二甲酸)乙二醇酯、聚(对苯二甲酸/己二酸)乙二醇酯、聚(对苯二甲酸/癸二酸)乙二醇酯、聚(对苯二甲酸/癸烷二甲酸)乙二醇酯、聚(对苯二甲酸/萘二甲酸)乙二醇酯、聚对苯二甲酸(丁二醇/乙二醇)酯等,它们可以单独使用,也可以混合2种以上。通过使用上述聚对苯二甲酸乙二醇酯树脂(B),可以兼具成型性和金属直接蒸镀性。
作为本发明中使用的聚对苯二甲酸乙二醇酯树脂(B),优选为在25℃测定邻氯苯酚溶液时的特性粘度为0.36~1.60,特别优选在0.45~1.35的范围内。当特性粘度小于0.30时,机械特性变得不好,另一方面,当特性粘度超过1.60时,成型性有变得不良的倾向。
本发明中的聚对苯二甲酸乙二醇酯树脂(B)的配合量,优选为聚酯树脂组合物全体的10~40重量%,更优选为15~35重量%,进一步优选为20~30重量%。如果聚对苯二甲酸乙二醇酯树脂(B)的配合量少于10重量%,则树脂组合物的表面外观容易变差,当超过40重量%时,树脂组合物的注射成型时的脱模性差,成型高周期性有恶化的倾向。
本发明中使用的烧成高岭土(C),是对基本化学式Al2OSi2O5(OH)4·nH2O所代表的含水硅酸铝进行烧成并除去水分而获得的。在本发明中,其中优选使用在600℃~1500℃的条件下烧成的高岭土。如果使用未烧成的高岭土,则树脂组合物的机械特性有变得不良的倾向,不是优选的。烧成高岭土(C)的平均粒径优选为0.1μm~1.5μm。如果平均粒径超过1.5μm,则金属直接蒸镀性低下,不是优选的。即,通过使用上述的平均粒径0.1μm~1.5μm的烧成高岭土,可以兼具机械特性和金属直接蒸镀性。
另外,烧成高岭土(C),优选为用下述物质进行了表面处理的烧成高岭土,更优选为用乙烯基硅烷化合物进行了表面处理的烧成高岭土,进一步优选为用乙烯基三乙氧基硅烷进行了表面处理的烧成高岭土,其中,所述物质为:乙烯基三乙氧基硅烷、乙烯基三氯硅烷等的乙烯基硅烷化合物;γ-环氧丙氧基丙基三甲氧基硅烷、γ-环氧丙氧基丙基三乙氧基硅烷、β-(3,4-环氧环己基)乙基三甲氧基硅烷等的环氧硅烷化合物;γ-(2-氨基乙基)氨基丙基甲基二甲氧基硅烷、γ-(2-氨基乙基)氨基丙基三甲氧基硅烷、γ-氨基丙基三甲氧基硅烷等的氨基硅烷化合物;硬脂酸、油酸、褐煤酸、十八烷醇等的长链脂肪酸或长链脂肪族醇等。作为用乙烯基三乙氧基硅烷进行了表面处理的烧成高岭土,可以列举出林化成(株)制“トランスリン77”(平均粒径:1.4μm)作为优选例。
本发明中的烧成高岭土(C)的配合量优选为聚酯树脂组合物全体的0.1~40重量%,更优选为1~30重量%,进一步优选为3~15重量%。如果烧成高岭土(C)的配合量少于0.1重量%,则形成了金属直接蒸镀膜的光反射体被进行了高温暴露的情况下的亮度感低下,如果超过40重量%,则由于填料浮出,导致金属直接蒸镀性低下。
在本发明中,优选使用球状无机填充材料(D)。作为球状无机填充材料(D),可以列举出,沸石、绢云母、叶蜡石、膨润土、硅酸铝等的硅酸盐;氧化铝、氧化硅、氧化镁、氧化锆、二氧化钛、氧化铁等的金属化合物;碳酸钙、碳酸镁、白云石等的碳酸盐;硫酸钙、硫酸钡等的硫酸盐;氢氧化钙、氢氧化铝等的氢氧化物;玻璃珠;陶瓷珠;氮化硼;碳化硅和二氧化硅等,也可以并用2种以上的这些填充材料。其中,优选使用硫酸钡和/或二氧化钛,因为这样可以获得光反射体的高镜面性、高亮度感。
本发明中的球状无机填充材料(D)的配合量,优选为聚酯树脂组合物总体的0.1~40重量%,更优选为1~30重量%,进一步优选为3~15重量%。如果球状无机填充材料(D)的配合量少于0.1重量%,则不能获得光反射体的高镜面性、高亮度感,如果大于40重量%,则由填料的浮出而导致金属直接蒸镀性低下。
在本发明中,从成型周期短缩的方面出发,优选进而在聚酯树脂组合物中配合脱模剂(E)。通过配合脱模剂(E),可以降低与模具表面的摩擦,使得容易滑动,因此可以缩短注射成型时的冷却时间,可以缩短成型周期。作为脱模剂(E),可以列举出,巴西棕榈蜡、米糠蜡等的植物性蜡;蜜蜡、羊毛脂等的动物性蜡;褐煤蜡、褐煤酸酯蜡、褐煤酸复合酯蜡等的矿物类蜡;石蜡、聚乙烯蜡等的石油类蜡;蓖麻油及其衍生物、脂肪酸及其衍生物等的油脂类蜡,也可以将这些脱模剂并用2种以上。为了获得光反射体的高镜面性、高亮度感,其中优选使用褐煤酸酯蜡或褐煤酸复合酯蜡,更优选褐煤酸复合酯蜡。
本发明中所说的褐煤酸复合酯蜡,是用醇或二元羧酸对褐煤酸进行酯化所获得的物质,所述褐煤酸是通过从由作为化石蜡的1种的煤获得的植物油脂成分中粉碎提取而得的。所谓复合,是指经过了在酯化时使用3元醇进行高分子量化的工序,上述的褐煤酸复合酯蜡中的低分子量成分少,高温时的气体成分的挥发减少,因此可以兼具注射成型时的成型性和在高温暴露形成了金属直接蒸镀膜的光反射体的情况下的亮度感的维持。
脱模剂(E)的配合量,优选为聚酯树脂组合物总量的0.001~5.0重量%,更优选为0.003~4.5重量%,进一步优选为0.1~4.0重量%。如果配合量小于0.001重量%,则注射成型时容易发生脱模不良,如果大于5.0重量%,则由于气体成分的挥发,导致形成了金属直接蒸镀膜的光反射体被高温暴露的情况下的亮度感容易降低。
在不损害本发明的效果的范围内,在本发明的聚酯树脂组合物中,可以添加抗氧化剂、稳定剂、紫外线防止剂、着色剂、阻燃剂、阻燃助剂、冲击改良材料、润滑剂等的通常的添加剂和少量的其他种类的聚合物。
作为抗氧化剂,可以列举出,2,6-二叔丁基-4-甲基苯酚、四(亚甲基-3-(3,5-二叔丁基-4-羟基苯基)丙酸酯)甲烷、三(3,5-二叔丁基-4-羟基苄基)异氰脲酸酯等的苯酚类化合物;3,3’-硫代二丙酸二月桂基酯、3,3’-硫代二丙酸二肉豆蔻基酯等的硫类化合物;三壬基苯基亚磷酸酯、二硬脂基季戊四醇二亚磷酸酯等的磷类化合物等。
作为稳定剂,可以列举出,包括2-(2’-羟基-5’-甲基苯基)苯并三唑的苯并三唑类化合物、2,4-二羟基二苯甲酮那样的二苯甲酮类化合物、磷酸单硬脂酸酯或磷酸二硬脂酸酯、磷酸三甲酯等的磷酸酯等。
通过组合2种以上的这些各种添加剂,可以获得协同效果,因此可以合并使用。
另外,例如作为抗氧化剂例示的添加剂,有时也用作稳定剂、紫外线吸收剂。另外,对于作为稳定剂例示的添加剂,有具有抗氧化作用、紫外线吸收作用的物质。即,上述分类是方便的,但是对作用没有限定。
作为紫外线吸收剂,可以列举出例如,2-羟基-4-正十二烷基氧二苯甲酮、2,2’-二羟基-4,4-二甲氧基二苯甲酮、双(5-苯甲酰-4-羟基-2-甲氧基苯基)甲烷等代表的二苯甲酮类紫外线吸收剂;2-(2’-羟基-5’-甲基苯基)苯并三唑、2-(2’-羟基-3’,5’-二叔戊基苯基)苯并三唑、2-(2’-羟基-3’,5’-双叔戊基苯基)苯并三唑、2-(2’-羟基-3’,5’-双(α,α’-二甲基苄基)苯基苯并三唑、2,2’-亚甲基-双[4-(1,1,3,3-四甲基丁基)-6-(2H-苯并三唑-2-基)苯酚]、甲基-3-[3-叔丁基-5-(2H-苯并三唑-2-基)-4-羟基苯基丙酸酯与聚乙二醇的缩合物代表的苯并三唑类紫外线吸收剂。
另外,也可以包括双(2,2,6,6-四甲基-4-哌啶基)癸二酸酯、双(1,2,2,6,6-五甲基-4-哌啶基)癸二酸酯、四(2,2,6,6-四甲基-4-哌啶基)-1,2,3,4-丁烷四甲酸酯、四(1,2,2,6,6-五甲基-4-哌啶基)-1,2,3,4-丁烷四甲酸酯、聚{[6-(1,1,3,3-四甲基丁基)氨基-1,3,5-三嗪-2,4-二基][(2,2,6,6-四甲基哌啶基)亚氨基]六亚甲基[(2,2,6,6-四甲基哌啶基)亚氨基]}、聚甲基丙基3-氧-[4-(2,2,6,6-四甲基)哌啶基]环己烷等代表的阻胺类的光稳定剂,从耐气候性等的观点出发,该光稳定剂与上述紫外线吸收剂、各种抗氧化剂的并用,能够发挥更良好的性能。
阻燃剂,有卤类、磷酸酯类、金属盐类、红磷、硅类、金属水合物类等,也含有滴下防止剂。着色剂,可以列举出,有机染料、有机颜料、无机颜料等。另外,可以列举出,荧光增白剂、蓄光颜料、荧光染料、流动改质剂、无机和有机的抗菌剂、光催化类防污剂、接枝橡胶代表的冲击改质剂、红外线吸收剂、光致变色剂(photochromic agent)等。
本发明的聚酯树脂组合物,优选为配合成分被均一地分散,作为其配合方法,可以使用任意的方法。作为代表例,可以列举出,使用单螺杆或双螺杆挤出机、班伯里混合机、捏和机或混炼辊等的公知的熔融混合机,在200~350℃的温度下进行熔融混炼的方法。各成分可以预先一起混合,然后熔融混炼。另外,附着在各成分上的水分少的一方是优选的,优选预先干燥,但是不一定需要使全部成分干燥。
作为本发明的聚酯树脂组合物的优选的制造方法的例子,可以列举出,使用机筒温度230~300℃的双螺杆挤出机,在该挤出机中供给配合了(A)~(D)和其他添加物的原料,进行混炼的方法。
本发明的聚酯树脂组合物,在用ISO3274规定的中心线平均粗糙度1.0nm的镜面模具进行成型的情况下,成型品表面的中心线平均粗糙度优选为5.0nm~20.0nm。本发明的成型品表面的中心线平均粗糙度,通过如下操作来求得,即,用ミツトヨ(株)制的表面粗糙度测定器“SURFTEST-500”,对在机筒温度270℃、模具温度80℃、模具镜面部分的中心线平均粗糙度1.0nm的条件下注射成型获得的镜面四方板的镜面部分的任意的10个位置,测定ISO 3274规定的中心线平均粗糙度(Ra),对测定值进行平均。在用本发明的聚酯树脂组合物制造的成型品的中心线平均粗糙度小于5.0nm的情况下,有可能粘贴在模具镜面部分,因此不优选,当中心线平均粗糙度超过20.0nm的情况下,金属直接蒸镀性低下,在不对成型品表面进行底漆处理地形成金属蒸镀膜的情况下,该金属蒸镀膜与该成型品的表面接合的光反射体的亮度感差,因此不优选。
本发明的聚酯树脂组合物,通过注射成型、挤出成型、吹塑成型、传递成型、真空成型等热塑性树脂的公知的成型方法来成型,其中优选通过注射成型来成型。在通过注射成型制造的情况下,优选使机筒温度比树脂组合物的熔点高20℃~50℃左右,使模具温度为60~120℃。
本发明的光反射体,是通过将聚酯树脂组合物注射成型,将金属膜蒸镀到所获得的成型品上来进行制造的。作为金属膜蒸镀方法的优选例,可以列举出,用岛津制作所(株)制真空蒸镀装置E-250A型,将通过加热而挥发的铝直接蒸镀而不使用底漆的方法。由此,可以不使用现有技术中在底漆处理中需要的有机溶剂地制造制品,因此环境负荷小,另外,由于不需要蒸散有机溶剂的过程,因此可以显著简化工艺,可以消减成本。
本发明的光反射体的亮度感优异,可以低成本无环境负荷地制造,因此可以适合用作汽车用灯的罩、反射镜、附加部分、家电照明器具等。
实施例
下面列举实施例来进一步详细说明本发明。
实施例和比较例的评价方法如下所示。
(1)表面粗糙度<中心线平均粗糙度(Ra)>的评价
中心线平均粗糙度,通过如下操作来求得,即,用ミツトヨ(株)制的表面粗糙度测定器“SURFTEST-500”,对在机筒温度270℃、模具温度80℃的条件下、用模具镜面部分的ISO 3274规定的中心线平均粗糙度1.0nm的镜面模具注射成型获得的镜面四方板的镜面部分的任意的10个位置,测定ISO 3274规定的中心线平均粗糙度Ra,对测定值进行平均。数值越低,表面平滑性越优异。
(2)金属直接蒸镀性的评价
对在机筒温度270℃、模具温度80℃的条件下用模具镜面部分的ISO3274规定的中心线平均粗糙度1.0nm的镜面模具注射成型获得的镜面四方板,用岛津制作所(株)制真空蒸镀装置E-250A型,直接蒸镀铝,通过目视确认,表面完全没有模糊、亮度感非常优异的记做◎◎,表面完全没有模糊、有亮度感的记做◎,一部分模糊、但是不防碍亮度感的记做○,全体模糊、亮度感差的记做×。
(3)高温暴露后的亮度感的评价
在对上述光反射体在160℃高温暴露72小时后,与金属直接蒸镀性同样进行目视评价。
(4)脱模性的评价
在机筒温度270℃、模具温度80℃的条件下通过注射成型制作镜面四方板时,将脱模销没有陷入板内、铸口没有破碎的记做○,将脱模销陷入板内、铸口没有破碎、没有发生显著变形的记做△,将铸口有破碎的记做×。
(5)耐冲击性的评价(冲击强度)
将厚度3.0mm的悬臂梁式冲击试验用试验片(piece),在机筒温度260℃、模具温度80℃的条件下注射成型,用于试样。依据ASTM D256,测定带有凹口的悬臂梁式冲击强度。
(6)刚性的评价(弯曲模量)
依据ASTM D790的方法进行评价。使用厚度3.2mm的试验片,其成型条件为:机筒温度260℃、模具温度80℃。
下面,表示实施例和比较例中使用的配合组合物。
(A-1)聚对苯二甲酸丁二醇酯树脂东丽(株)制“トレコン1200S”、特性粘度1.25、氯仿提取量0.6%(以下,也称作PBT)
(A-2)聚对苯二甲酸丁二醇酯树脂:东丽(株)制“トレコン1100S”、特性粘度0.89、氯仿提取量1.05%(以下,也称作PBT)
(A-3)聚对苯二甲酸丁二醇酯树脂:特性粘度125、氯仿提取量0.15%(以下,也称作PBT)
(B-1)聚对苯二甲酸乙二醇酯树脂:东丽(株)制“TSB900”、特性粘度0.90(以下,也称作PET)
(C-1)烧成高岭土:林化成(株)制“トランスリン77”、平均粒径=0.8μm、乙烯基三乙氧基硅烷表面处理
(C-2)烧成高岭土:林化成(株)制“サチントンW”、平均粒径=1.4μm、没有进行表面处理
(D-1)硫酸钡:堺化学(株)制“B-55”、平均粒径=0.66μm
(D-2)二氧化钛:石原产业(株)制“CR-63”、平均粒径=0.21μm、通过氯法制造的、使用了氧化铝水合物和硅酸水合物的2类作为处理剂的金红石型的二氧化钛
(E-1)褐煤酸复合酯蜡:クラリアントジヤパン(株)制“リコルブWE40”
(E-2)褐煤酸酯蜡:クラリアントジヤパン(株)制“リコワツクスOP”
(F)芳香族聚碳酸酯树脂:出光化学(株)制“A1900”数均分子量19000(以下也称作PC)
(G)滑石:富士タルク(株)制“LMS300”、平均粒径=1.0μm
(H-1)未烧成高岭土:林化成(株)制“ASP200”、平均粒径=0.4μm、没有进行表面处理
(H-2)未烧成高岭土:林化成(株)制“ASP400”、平均粒径=4.8μm、没有进行表面处理
实施例1~9
按照表1所示的组合来配合(A)~(E)。
各实施例中记载的材料的制造方法如下。即,使用机筒温度设定在250℃的螺杆直径57mmΦ的双螺杆挤出机来制造。从后供给部供给(A)~(E)以及其他添加剂的全部,进行熔融混炼,在冷却浴中冷却从模头排出的条状物,然后用条状物切割机进行颗粒化。所获得的各颗粒,在用130℃的热风干燥机干燥3小时以上后,使用上述评价方法记载的方法来成型,进行评价。
其结果一并记于表1。所获得的组合物,都具有优异的金属直接蒸镀性、表面平滑性、脱模性、耐冲击性、高温暴露后的亮度感。
比较例1~9
比较例的配合处方和评价结果如表2所示。
如表2所示那样改变树脂组合物的组成,除此之外,与实施例同样进行颗粒化和成型,进行各种评价。获得的组合物,金属直接蒸镀性、表面平滑性、脱模性、耐冲击性的任一者都差。
比较例5、9,在使用未烧成高岭土的情况下,高岭土的粒径不在本发明的范围内的情况下,耐冲击性差、或者金属直接蒸镀性、高温暴露后的亮度感差。
实施例10
使用实施例1的树脂组合物,对在机筒温度270℃、模具温度80℃、模具镜面部分的ISO 3274规定的中心线平均粗糙度1.0nm的条件下进行注射成型获得的镜面四方板,用岛津制作所(株)制真空蒸镀装置E-250A型,直接蒸镀铝,在表面形成金属蒸镀膜,制作该金属蒸镀膜与该成型品的表面接合的光反射体。通过目视确认该光反射体,结果表面完全没有模糊,适合用作汽车用灯的罩、反射镜、附加部分、家电照明器具等。
比较例10
使用实施例1的树脂组合物,对在机筒温度270℃、模具温度80℃的条件下、用模具镜面部分的ISO 3274规定的中心线平均粗糙度1.0nm的镜面模具进行注射成型获得的镜面四方板,进行底漆涂布,用岛津制作所(株)制真空蒸镀装置E-250A型,蒸镀铝,通过目视确认,结果具有与实施例8同样的外观,没有发现金属直接蒸镀与底漆涂布后的蒸镀后的外观存在差别。
表1
实施例 | |||||||||||
项目 | 单位 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
配合组成 | PBT(A-1) | 重量% | 54.8 | - | - | 54.8 | 54.8 | 64.8 | 54.8 | 54.995 | 51.5 |
PBT(A-2) | 重量% | - | - | 54.8 | - | - | - | - | - | - | |
PBT(A-3) | 重量% | - | 54.8 | - | - | - | - | - | - | - | |
PET(B-1) | 重量% | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | |
烧成高岭土(C-1) | 重量% | 10 | 10 | 10 | 10 | - | 5 | 10 | 10 | 10 | |
烧成高岭土(C-2) | 重量% | - | - | - | - | 10 | - | - | - | - | |
硫酸钡(D-1) | 重量% | 10 | 10 | 10 | - | 10 | 5 | 10 | 10 | 10 | |
二氧化钛(D-2) | 重量% | - | - | - | 10 | - | - | - | - | - | |
褐煤酸复合酯蜡(E-1) | 重量% | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | - | 0.005 | 3.5 | |
褐煤酸酯蜡(E-2) | 重量% | - | - | - | - | - | - | 0.2 | - | - | |
特性 | 表面粗糙度(Ra) | nm | 15 | 15 | 15 | 17 | 18 | 13 | 16 | 14 | 17 |
金属直接蒸镀性 | - | ◎ | ◎◎ | ◎ | ◎ | ◎ | ◎ | ○ | ◎ | ○ | |
高温暴露后的亮度感 | - | ◎ | ◎◎ | ○ | ◎ | ○ | ○ | ○ | ◎ | ○ | |
脱模性 | - | ○ | ○ | ○ | ○ | ○ | ○ | ○ | △ | ○ | |
冲击强度 | J/m | 32 | 32 | 28 | 30 | 23 | 35 | 32 | 32 | 31 | |
弯曲模量 | G P a | 3.9 | 3.9 | 3.9 | 3.6 | 4.0 | 3.5 | 3.9 | 3.9 | 3.9 |
表2
比较例 | |||||||||||
项目 | 单位 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
配合组成 | PBT(A-1) | 重量% | 54.8 | 54.8 | 69.8 | 79.8 | 54.8 | 54.8 | 54.8 | 74.8 | 54.8 |
PET(B-1) | 重量% | - | 25 | 30 | - | 25 | 25 | 25 | 5 | 25 | |
PC(F) | 重量% | 25 | - | - | - | - | - | - | - | - | |
烧成高岭土(C-1) | 重量% | 10 | 10 | - | 10 | - | - | 20 | 10 | - | |
未烧成高岭土(H-1) | 重量% | - | - | - | - | 10 | - | - | - | - | |
未烧成高岭土(H-2) | 重量% | - | - | - | - | - | - | - | - | 10 | |
硫酸钡(D-1) | 重量% | 10 | - | - | 10 | 10 | 20 | - | 10 | 10 | |
滑石(G) | 重量% | - | 10 | - | - | - | - | - | - | - | |
褐煤酸复合酯蜡(E-1) | 重量% | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | |
特性 | 表面粗糙度(Ra) | nm | 20 | 30 | 10 | 25 | 17 | 17 | 30 | 25 | 30 |
金属直接蒸镀性 | - | ○ | ○ | ◎ | × | ◎ | ◎ | × | × | × | |
高温暴露后的亮度感 | - | × | ○ | × | × | ◎ | × | × | × | × | |
脱模性 | - | × | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | |
冲击强度 | J/m | 36 | 39 | 37 | 27 | 15 | 24 | 35 | 31 | 13 | |
弯曲模量 | GPa | 3.7 | 4.3 | 2.6 | 3.7 | 4.4 | 3.4 | 4.2 | 4.1 | 4.6 |
工业可利用性
本发明的光反射体用聚酯树脂组合物,可以用作汽车用灯的罩、反射镜、附加部分、家电照明器具中的筒灯(downlight)照明的反射板、直管荧光灯的反射板等。
Claims (7)
1.一种聚酯树脂组合物,以聚酯树脂组合物总量为100重量%计,含有30~80重量%的聚对苯二甲酸丁二醇酯树脂(A)、10~40重量%的聚对苯二甲酸乙二醇酯树脂(B)、0.1~40重量%的平均粒径1.5μm以下的烧成高岭土(C)、0.1~40重量%的球状无机填充材料(D)。
2.如权利要求1所述的聚酯树脂组合物,使用ISO3274规定的中心线平均粗糙度1.0nm的镜面模具制造出的成型品表面的中心线平均粗糙度为5.0~20.0nm。
3.如权利要求1~2的任一项所述的聚酯树脂组合物,球状无机填充材料(D)为硫酸钡(D-1)和/或二氧化钛(D-2)。
4.如权利要求1~3的任一项所述的聚酯树脂组合物,平均粒径1.5μm以下的烧成高岭土(C)是经过表面处理的。
5.如权利要求1~4的任一项所述的聚酯树脂组合物,以聚酯树脂组合物总量为100重量%计,含有0.001~5.0重量%的脱模剂(E)。
6.如权利要求5所述的聚酯树脂组合物,脱模剂(E)为褐煤酸复合酯蜡。
7.一种光反射体,在使用权利要求1~6的任一项所述的聚酯树脂组合物制造的成型品的表面的一部分或全体上形成有金属蒸镀膜,该金属蒸镀膜与该成型品的表面接合。
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2005
- 2005-07-08 US US11/659,706 patent/US7452587B2/en not_active Expired - Fee Related
- 2005-07-08 CN CN2005800268086A patent/CN1993424B/zh not_active Expired - Fee Related
- 2005-07-08 JP JP2006531341A patent/JP4835438B2/ja not_active Expired - Fee Related
- 2005-07-08 WO PCT/JP2005/012642 patent/WO2006016458A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
---|---|
WO2006016458A1 (ja) | 2006-02-16 |
JPWO2006016458A1 (ja) | 2008-05-01 |
JP4835438B2 (ja) | 2011-12-14 |
US7452587B2 (en) | 2008-11-18 |
CN1993424B (zh) | 2010-05-05 |
US20070254150A1 (en) | 2007-11-01 |
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