CN102612434A - 具有改善的阻燃性能的注塑的多组件复合体系 - Google Patents

具有改善的阻燃性能的注塑的多组件复合体系 Download PDF

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CN102612434A
CN102612434A CN2010800427613A CN201080042761A CN102612434A CN 102612434 A CN102612434 A CN 102612434A CN 2010800427613 A CN2010800427613 A CN 2010800427613A CN 201080042761 A CN201080042761 A CN 201080042761A CN 102612434 A CN102612434 A CN 102612434A
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CN102612434B (zh
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R·哈恩
C·施维克
A·米勒
H·弗兰森
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Bayer Intellectual Property GmbH
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Abstract

本发明提供具有改善的阻燃性能的完全或部分注塑的多组件复合体系及其制造方法。

Description

具有改善的阻燃性能的注塑的多组件复合体系
本发明提供具有改善的阻燃性能的完全或部分注塑的多组件复合体系及其制造方法。
在研发壁厚非常小的完全或部分注塑的多组件复合体系时,考虑到流动性和阻燃性能,有时对各个组件提出了非常高的要求。例如由于企业要遵守的安全标准,这两个特性对于阻燃性起着日益重要的作用。这里,视应用而定有时必须遵守不同的安全标准。但同时,应对确定的欧盟生态标签(Ecolabels)的设计和符合确定的欧盟生态标签(Ecolabels)标准越来越受到重视。添加剂的选择,和特别是阻燃剂的选择受到这样的标准的限制,或者还由于法律或标准的规定而受到限制。按照“Underwriters Laboratories”-检验实验室的防火标准(Brandnorm),所谓UL清单的是普遍认可的各个组份的分级。
因此,迄今为止不乏改善热塑性塑料的阻燃性的努力。例如,WO 00/26287A研究通过降低在含有脱模剂的磷稳定的挤出聚碳酸酯板中聚碳酸酯的粘度来改善阻燃性能。
在EP-A 1 339 546中公开了可热塑成型的聚碳酸酯复合材料及其在阻燃性聚碳酸酯成型件中的应用。其要求保护由至少一个LOI值小于29的层和至少一个LOI值大于29的层组成的可热塑变形的聚碳酸酯复合材料。在进一步的权利要求中和实施例中,该申请针对挤出复合材料,其中所述LOI值小于29的层据信是厚度为30μm-500μm的薄膜层。该材料据称适宜于满足飞机制造提出的要求。这样的由不同阻燃性能的材料组成的复合材料能够满足何种范围的UL分级未被提及。尤其没有说明,该复合材料尽管阻燃性低或无阻燃性材料的比例高,但还是可以良好地达到UL清单。
US-A 4824723也研究挤出多层材料,其中阻燃热塑性塑料的芯用非阻燃电绝缘层包覆。给出的芯厚度一般为4-240mm,外层1-10mm。该申请没有研究根据多组件注塑方法制造的材料,也没有论及所述外层的UL分级和为选定的材料调整的厚度比例。
在US-A 2008/0014446中描述了通过共挤出制造的阻燃性多层结构,然而为了通过所要求的防火测试,据称其中各层已具有足够的阻燃性。本发明表明,对于注塑的多组件复合体系这不是必要的。
在WO-A 1999/028128中描述了由阻燃和不阻燃薄膜形成的共挤出多层结构。该多层结构在最大厚度750μm的情况下包括至少5层。然而,这样的系统的性能,特别是阻燃性能不能转移到注塑的多组件复合体系。
最后,在WO 2007/024456A1中公开了由聚碳酸酯组合物形成的层压体及其制造方法以及由上述层压体形成的产品,其中该层压体包括第一和第二层,其中第一层包括聚碳酸酯、聚碳酸酯-聚硅氧烷共聚物,增弹剂(Elastifikator)和聚醚酰亚胺,其中所述聚碳酸酯包括约50重量%的聚碳酸酯、聚碳酸酯-聚硅氧烷-共聚物、增弹剂和聚醚酰亚胺的总重。以此获得改善的阻燃性、抗冲击性并在所述材料燃烧时减少烟气形成。但是这里证实特别是阻燃性仍旧是需要改善的。注塑多组件复合体系可以由相同的材料类型、具有不同添加剂的相同的材料类型和由不同的材料组成。注塑多组件复合体系的阻燃性能有时是未知的。因此,这例如可能导致这两个层分离,然后其分别燃烧。一组件受另一组件的影响也是可能的。
因此如果多组件复合体系需要防火等级(例如,UL94-V),这涉及列出每个单个组件的防火等级。而这些单个组件必须各自以该壁厚达到所要求的等级。当在设计领域特别是对透明度要求高,或者对某种阻燃剂要求使用最少量或者避免使用时,对于许多热塑性材料在薄的壁厚上难以达到该等级。
因此本发明的任务是,提供注塑多组件复合体系,其在复合体中可以达到某一防火等级,尽管至少一个单个组件没有达到这个防火等级。此外本发明的任务是,提供一种方法,其使得根据希望的阻燃性能选择合适的材料成为可能,所述材料对于这样的多组件复合体系是必须的。
现已发现,通过合适的材料组合,注塑多组件复合体系以总壁厚被认为有阻燃性。通过本发明显著地简化了UL所列的塑料(与阻燃性能相关)的材料选择,因为整个部件可以看成是由一种材料组成的。令人吃惊的是,因为最新的UL清单的运用迄今为止没有规定这样看待该系统。如上所述,至今只描述了具有不同的阻燃性层的挤出系统,其中对于各层和对整个体系的要求以及提出的解决方案不能与本发明相比。这即表明,令人意外地,在完全或部分注塑的多组件复合体系中,大量的材料结合的可能性依赖于各个组件的UL清单而得出。
按照本发明的完全或部分注塑多组件复合体系指的可以是背面注塑(hinterspritzt)薄膜,或者可以是2组件或者多组件注塑复合体。
在以下申请书中使用的缩写“HB”、“V0”、“V1”和“V2”涉及根据UL防火试验相应的防火等级,其在下面还要进一步解释。
按照本发明的多组件复合体系具有厚度a+b,并含有至少一个厚度为a的组件A和一个厚度为b的组件B,其中
组件A是背面注塑热塑性薄膜或至少一层注塑热塑性塑料,其中所述薄膜的厚度或所述一层的厚度,或者在多层的情况下组件A的层的总厚度为厚度a,且
组件B是至少一层注塑热塑性塑料,其中所述一层的厚度,或者在多层的情况下组件B的层的总厚度为厚度b,
而且其中组件A和B满足下列标准之一:
1.组件A以厚度a至少满足V2并以厚度a+b只满足HB,组件B以厚度b具有V2,而以厚度a+b具有V0或V1,而且比率a/b≤2.5,优选≤1.8,特别优选≤1.2;
2.组件A以厚度a和以厚度a+b只满足HB,组件B以厚度a+b满足V0或V1,且比率a/b≤0.3,优选≤0.2;或者
3.组件A或者B的至少一种以厚度a或b只满足V2,而且这两个组件以厚度a+b满足V0或V1。
在这些情况下整个体系令人意外地满足防火等级V0或V1。
本发明也提供用于制造这样的复合体系的方法,所述方法由下列步骤组成:
a)选择适合于组件A和B的材料,其中在每一情况中选出的组件组合满足标准1-3之一,
b)通过双组件或者多组件注塑方法,通过用组件B对由组件A组成的薄膜进行背面注塑,或者通过用包含组件A的涂层涂覆由组件B组成的注塑件,制备完全或部分注塑的复合体系。
组件A或者是注塑的热塑材料或者是薄膜,或者是直接制造或者由溶液制造的涂层。决定性的是,组件A不含或只含少量阻燃性添加剂,使得组件A以厚度a+b和以厚度a都不满足按照UL分级确定的实际要求的阻燃性能。组件A可以是透明的或不透明的。
通常所有热塑性和热塑性-弹性塑料均适宜于作为制造该薄膜用的热塑性材料和原材料。尤其适用的是非增强的、增强的和/或填充的塑料,所述塑料基于下列物质:聚酰胺(PA)、聚酯,特别是聚对苯二甲酸乙二醇酯(PET)、聚对苯二甲酸丁二醇酯(PBT)、聚丙烯酸酯,特别是聚甲基丙烯酸甲酯(PMMA),聚对苯二甲酸丁二醇酯(PBT)、聚苯乙烯(PS)、间同立构聚苯乙烯、丙烯腈-丁二烯-苯乙烯(ABS)、聚烯烃,特别是聚丙烯(PP)、聚乙烯(PE),聚碳酸酯(PC)、共聚碳酸酯(CoPC)、共聚酯碳酸酯、TPU、苯乙烯-乙烯-丁二烯-聚合物(SEBS)或者这些塑料的混合物。
在一个实施方案中,组件A的原材料是透明的聚合物材料,优选选自下列聚合物:聚乙烯(PE)、聚丙烯(PP)、聚对苯二甲酸乙二醇酯(PET)、氰基丙烯酸酯(CA)、三醋酸纤维素(CTA)、乙基醋酸乙烯酯(Ethylvinylacetat,EVA)、丙基醋酸乙烯酯(Propylvinylacetat,PVA)、聚乙烯醇缩丁醛(PVB)、聚氯乙烯(PVC)、聚酯、聚碳酸酯(PC)、共聚碳酸酯(CoPC)、共聚酯碳酸酯、聚萘二甲酸乙二醇酯(Polyethylennaphtalat)(PEN)、聚氨酯(PU)、热塑性聚氨酯(TPU)、聚酰胺(PA)、聚甲基丙烯酸甲酯(PMMA)、硝酸纤维素和至少两种上述聚合物单体的共聚物以及两种或更多种这些聚合物的混合物。
如果组件A是预制薄膜,则其可以用传统的方法通过挤出、由溶液或通过注塑制备。然后将该薄膜放入模具中并用组件B的材料进行背面注塑。
现有技术已知的适宜于涂覆工艺的所有聚合物均可考虑作为涂料。这里可以列举例如聚合的酯、碳酸酯、丙烯酸酯、醚、尿烷或酰胺,其在施涂和溶剂蒸发后大都还将例如通过热或光化学后处理而固化。所有传统的涂覆工艺,例如,喷涂、流涂、浸涂、辊涂或刮涂均适用于涂覆。
所有可以通过注塑工艺加工的热塑性塑料均可以考虑作为组件B的材料。特别适用的再次是未增强的、增强的和/或填充的基于下列的塑料:聚酰胺(PA)、聚酯,特别是聚对苯二甲酸乙二醇酯(PET)、聚对苯二甲酸丁二醇酯(PBT),聚丙烯酸酯,特别是聚甲基丙烯酸甲酯(PMMA),聚对苯二甲酸丁二醇酯(PBT)、聚苯乙烯(PS)、间同立构聚苯乙烯、丙烯腈-丁二烯-苯乙烯(ABS)、聚烯烃,特别是聚丙烯(PP)、聚乙烯(PE)、聚碳酸酯(PC)、共聚碳酸酯(CoPC)、共聚酯碳酸酯、TPU或者这些塑料的混合物。
在按照本发明的方法的步骤a)中如此选择组件A和B,使其满足标准1-3之一。此外,必须确保组件A粘附在组件B上。
在按照本发明的方法的步骤b)中制造构件,而且尤其通过两种原则上由现有技术上充分已知的多组件注塑工艺或者薄膜背面注塑来制造构件。
对于塑料的粘结特性和相应的制造方法,例如,在Handbuch Spritzgieβen(ISBN 3446-15632-1-Carl Hanser-Verlag 2001),“6.5Verbinden mehrererKomponenten beim Spritzgieβen”章,Mehrkomponenten-Spritzgieβverfahren第488、489、505、508、510、514、527页/Haftung von Komponente A auf B第517页/Folienhinterspritzen第566、573页有详细描述。
出乎意料地已发现,虽然组件B以厚度a+b必须具有按照UL分级确定的实际要求的阻燃性能,但以厚度b不需要满足该阻燃性分级。决定性的是,由组件A和组件B形成的层的组合满足上述标准1-3之一。
本发明特别涉及复合构件,由于其复杂的几何形状和/或功能整合,例如螺旋盖(Schraubdomen)的整合,不能或者只有以显著的投入才能通过挤出或共挤出工艺生产。
所述组件A和B的材料除了阻燃性添加剂以外还可以含有其他添加剂。原则上对添加剂的选择并无限制。可能的添加剂描述在例如WO 99/55772,15-25页,EP-A 1 308 084中和在“Plastics Additives Handbook,编辑Hans Zweifel,2000年第5版,Hanser Publishers,慕尼黑,相应的章节中。
例如可以含有下列添加剂:着色料,亦即无机和有机染料和颜料、脱模剂、润滑剂、流平剂(Flieβmittel)、紫外防护剂、IR吸收剂、阻燃剂、荧光增白剂、无机和有机散射颗粒、抗静电剂、热稳定剂、成核剂、填料、玻璃珠、玻璃纤维和碳纤维、抗冲击改性剂和碳纳米管。染料和颜料可以是有机的或无机的,例如二氧化钛、硫酸钡和氧化锌。也使用炭黑和金属亮片。聚合的散射颗粒的示例是聚丙烯酸酯和PMMA,例如核-壳-丙烯酸酯、聚四氟乙烯、聚烷基三烷氧基硅氧烷和这些组分的混合物。例如,紫外吸收剂属于包括下列物质的类型:苯并三唑类、草酰苯胺类、2-氰基丙烯酸酯、亚苄基丙二酸酯类(Benzilidinmalonate)和甲脒类以及二苯甲酮类,特别是联苯甲酰间苯二酚类(Dibenzolyresorcine)和三嗪类,特别是2-(2-羟苯基)-1,3,5-三嗪类。
组件A任选地和组件B含有阻燃剂,所述阻燃剂的选择由所采用的热塑性材料的类型和要取得的阻燃性确定。
作为阻燃剂的示例可以列举磷化合物,例如,通式(1)的那些,
Figure BPA00001547500300061
其中
R1-R20彼此独立地表示氢,最多6个碳原子的直链或支链烷基
n表示0.5-50的平均值,和
B各自为C1-C12-烷基,优选甲基,或者卤素,优选氯或溴
q各自彼此独立地表示0、1或2,
X  表示单键、C=O、S、O、SO2、C(CH3)2、C1-C5-烷撑基、C2-C5-烷叉基(Alkyliden)、C5-C6-环烷叉基、C6-C12-亚芳基(Arylen)、在所述亚芳基上能够稠合任选地含有杂原子的其它芳族环,或者表示式(2)或者(3)的残基
其中Y表示碳和
R21和R22对于每个Y可独立地选择,彼此独立地表示氢或者C1-C6-烷基,优选氢、甲基或乙基,
m表示4-7,优选4或5的整数,附带条件是在至少一个原子Y上R21和R22同时为烷基。
特别优选的是这样的式(1)磷化合物,其中R1-R20彼此独立地表示氢或甲基残基,而且其中q=0。特别优选这样的化合物,其中X=SO2、O、S、C=O、C2-C5-烷叉基、C5-C6-环烷叉基或C6-C12-亚芳基。最特别优选X=C(CH3)2的化合物。
低聚度n作为平均值由上面提及的含磷化合物制造方法给出。这里低聚度一般为n≤10。优选n为0.5-5,特别优选0.7-2.5的化合物。最特别优选的是这样的化合物,其含有高含量的n=1的分子,所述含量为60%-100%,优选为70-100%,特别优选为79%-100%。由生产决定,上述化合物还可以含有少量磷酸三苯酯。所述磷化合物是已知的(参见例如EP-A 363 608、EP-A 640 655)或者可以根据已知的方法以类似的方式生产(例如,Ullmanns
Figure BPA00001547500300071
dertechnischen Chemie,卷18,第301及其后1979;Houben-Weyl,Methoden derorganischen Chemie,卷12/1,第43页;Beilstein卷6,第177页)。
此外,脂族或芳族磺酸衍生物,磺酰胺衍生物和磺酰亚胺衍生物的碱金属盐或碱土金属盐尤其可以用作阻燃剂,例如全氟丁烷硫酸钠或钾、全氟辛烷硫酸钠或钾、二苯砜-磺酸钠或钾和2,4,6-三氯苯甲酸钠或钾和N-(对-甲苯磺酰)-对-甲苯磺酰亚胺-钾盐和N-(N′-苄氨基羰基)-氨磺酰亚胺钾盐(N-(N′-Benzylaminocarbonyl)sulfanylimid-Kaliumsalz)。全氟丁烷磺酸钾尤其作为BayowetC4(Lanxess公司,Leverkusen,德国)、RM64(Miteni公司,意大利)或作为3MTM全氟丁烷磺酰氟FC-51(3M公司,美国)商购可得。
含卤阻燃剂例如是溴化化合物如溴化低聚碳酸酯例如Chemtura公司的四溴双酚-A低聚碳酸酯BC-52、BC-58
Figure BPA00001547500300074
、BC-52HP
Figure BPA00001547500300075
。此外,可以列举聚丙烯酸五溴苄酯(例如Dead Sea Bromine(DSB)公司的FR 1025)、四溴-双酚-A与环氧化物的低聚反应产物(例如DSB公司的FR 2300和2400),或者溴化的低聚苯乙烯或聚苯乙烯(例如Ferro Corporation公司的Pyro-Chek
Figure BPA00001547500300076
68PB、Chemtura公司的PDBS 80和Firemaster
Figure BPA00001547500300077
PBS-64HW)。
热塑性塑料中的添加剂的加入用常用的添加工艺进行,并可以例如通过混合添加剂在如二氯甲烷、卤代链烷烃、卤代芳族化合物、氯苯和二甲苯等适当的溶剂中的溶液与聚碳酸酯溶液进行。然后所述物料混合物(Substanzgemische)优选用已知的方法通过挤出均化。溶液混合物优选用已知的方法通过溶剂蒸发和随后的挤出后处理。
此外,可以将所述组合物在常规混合装置中混合并随后挤出,所述混合装置如螺杆挤出机(例如,双螺杆挤出机,ZSK)、捏合机、Brabender研磨机或者Banbury研磨机。挤出之后可以把挤出物冷却并粉碎。各组分还可以预混,然后把其余原料单独地和/或还混合地加入。
添加剂,特别是阻燃添加剂和/或紫外吸收剂还可以以浓缩物(母粒)添加到原材料中。在这种情况中,通过上述添加工艺之一把一种或多种添加剂以尽可能高的浓度加入热塑性载体材料中。然后,将添加剂浓缩物在加工之前掺入热塑性塑料,以便得到希望的添加剂最终浓度。
在另一个变体中还可以商购多种热塑性塑料作为含卤或无卤的阻燃的变体。
在不同的实施方案中,阻燃组件B是例如商购可得的聚碳酸酯和聚碳酸酯/ABS共混物,组件A是注塑品质的弱阻燃或不阻燃的聚碳酸酯或是聚碳酸酯薄膜或TPU薄膜。
组件A可以由一种材料和一层组成,或者也可以由多种材料和多层组成。在这种情况下,各层的总厚度被视为厚度a。
组件B可以由一种材料和一层组成,或者也可以由多种材料和多层组成。在这种情况下各层的总厚度被视为厚度b。
在一个特殊的实施方案中,组件B含有≥95重量%的聚碳酸酯和至少0.05重量%,优选0.1重量%的聚四氟乙烯以及其他阻燃添加剂,并且组件A含有≥95重量%的聚碳酸酯,而且组件A以厚度a至少满足V2和以厚度a+b只满足HB,组件B以厚度b满足V2和以厚度a+b满足V0或V1,而且比率a/b≤2.5,优选≤1.8和特别优选≤1.2。
厚度a、厚度b和总厚度a+b应理解为构件中的(壁)厚度,其对于相关材料的UL清单是至关重要的。然而,对于用于这些组件的材料的选择,决定性的可以只考虑上述标准。
构件中总厚度a+b优选为1-10mm,和最特别优选为2-8mm。
复合体系的通过由下列步骤a-b)组成的新的制造方法提供了更简单的工艺:a)选择适合于组件A和B的材料,其中在每一情况中选择的组件的组合满足下述标准1-3之一:
1.)组件A以厚度a至少满足V2和以厚度a+b只满足HB,组件B以厚度b具有V2和以厚度a+b满足V0或V1,而且比率a/b≤2.5,优选≤1.8和特别优选≤1.2;
2.)组件A以厚度a和以厚度a+b只满足HB,组件B以厚度a+b满足V0或V1,而且比率a/b≤0.3,优选≤0.2;或者
3.)组件A或B的至少一个以厚度a或b只满足V2且这两个组件以厚度a+b满足V0或V1;
b)通过双组件或者多组件注塑方法,通过用组件B对由组件A组成的薄膜进行背面注塑,或者通过用包含组件A的涂层涂覆由组件B组成的注塑件,制备完全或部分注塑的复合体系;
所述工艺使得用户以比至今可以选择的明显更大的量的材料用于完全或部分地注塑的多组件系统成为可能。但同时它不必以耗费的试错法实验得到最优材料组合,而是按照本发明的标准使得借助于各组件的UL特征参数来选择材料成为可能。
实施例:
1.使用的材料
所采用的热塑性材料是德国Bayer MaterialScience AG公司的Makrolon
Figure BPA00001547500300091
类型的聚碳酸酯、Bayblend
Figure BPA00001547500300092
类型的聚碳酸酯/ABS共混物和Makrofol
Figure BPA00001547500300093
类型的聚碳酸酯薄膜。采用下列具有提及特性的类型:
M1:Makrolon6555:聚碳酸酯,MVR(300℃/1.2kg)9.5cm3/10min;含无氯和无溴阻燃剂;UL 94V-0/3.0mm;中等粘度;可容易地脱模
M2:Makrolon
Figure BPA00001547500300095
6557:聚碳酸酯;MVR(300℃/1.2kg)9.5cm3/10min;含无氯和无溴阻燃剂;UL 94V-0/3.0mm;中等粘度;紫外稳定化;可容易地脱模
M3:Makrolon
Figure BPA00001547500300096
DP1-1884:聚碳酸酯,MVR(300℃/1.2kg)17cm3/10min;含无氯和无溴阻燃剂;低粘度;可容易地脱模
M4:Makrolon
Figure BPA00001547500300097
1952:聚碳酸酯,MVR(300℃/1.2kg)9.5cm3/10min;含无氯和无溴阻燃剂;UL 94V-0/2.3mm;中等粘度;可容易地脱模
M5:Makrolon
Figure BPA00001547500300101
7101:聚碳酸酯,MVR(300℃/1.2kg)33cm3/10min;专用阻燃系统;含无氯和无溴阻燃剂,UL 94V-0/1.5mm;低粘度;可容易地脱模;维卡软化温度50N;50℃/h=110℃;
M6:Makrolon
Figure BPA00001547500300102
2205:聚碳酸酯,MVR(300℃/1.2kg)35cm3/10min;可通用;低粘度;可容易地脱模
M7:Bayblend FR3005HF:聚碳酸酯/ABS共混物,注塑型;非常容易流动;维卡/B120=96℃;UL-清单1.5mm情况下94V-0;含无锑、无氯和无溴阻燃剂。
M8:Bayblend FR3020:聚碳酸酯/ABS共混物,5%矿物填充;薄壁型;注塑;维卡/B120=103℃;HDT/A>=85℃;薄壁厚(V-0在0.75mm)时非常好的UL清单,含无锑、无氯和无溴阻燃剂。
M9:Bayblend FR3021:聚碳酸酯/ABS共混物,15%矿物填充;注塑型;刚性增加;E模量=4800MPa;维卡/B 120=98℃;在1.5mm情况下UL清单94V-0;含无锑、无氯和无溴阻燃剂;灼热丝测试(GWFI):在2.0mm下960℃
M10:Bayblend T65XF:聚碳酸酯/ABS共混物,标准型;注塑;维卡/B120=120℃;相对于T65流动特性改善。
M11:Makrofol TP 1243,聚碳酸酯制非阻燃光散射薄膜,厚度500μm
M12:Makrofol FR 7-2,聚碳酸酯制非阻燃光散射薄膜,厚度500μm,UL94V-0/500μm
2.注塑试件的制造
试件用2K注塑法在具有最大800kN锁模力(Schlieβkraft)和螺杆直径25mm的注塑机ArburgAllrounder 370S 800-150上制造。使用带有可更替插件的母体模具用于制造具有可变厚度的校园(Campus)试件(插件[ASTM Stab 127x12,7xd,单位mm]所述可变厚度为0.8mm-1.5mm-2.0mm-3.0mm-3.8mm)。
这些材料使用之前各自以表1所列参数干燥。为了注塑加工材料,按照表1所列的物料温度调节。在2K注塑的第一步中,由材料组件A制造不同的厚度a(例如,0.8mm/1.5mm/2.0mm/3.0mm)的试件(燃烧棒(Brandstab)125x13xa)。所述燃烧棒在第二步中放入具有较大壁厚b(3.0mm/3.8mm)的模具中并用材料组件B背面注塑。
表1
  材料   干燥   物料温度[℃]   模具温度[℃]
  M1和M2   4小时/120℃   300   80
  M3   4小时/120℃   280   80
  M4   4小时/120℃   300   80
  M5   4小时/100℃   280   80
  M6   4小时/120℃   280   80
  M7   4小时/80℃   240   80
  M8   4小时/90℃   240   80
  M9   4小时/90℃   240   80
  M10   4小时/110℃   260   80
为了制造实施例1-26,各自以表2和3中所列的材料组件A和B加工成具有各自厚度a和b或具有总厚度a+b的2K试棒。燃烧试验的试验结果亦列于表2。
用组件A=M11和M12(表4)进行薄膜背面注塑时,把500μm薄膜放入燃烧棒模具(3.2mm/3.8mm)中,用组件B背面注塑并同样在按照UL94-V标准的燃烧试验中检验。
图1示意性给出了2K注塑试件的结构:
3)测试:
试棒的测试在标准存储后按照UL94-V标准(参见图2)在燃烧试验中进行。
所有结果汇总列于下表2-4中。
Figure BPA00001547500300121
表3
表4
Figure BPA00001547500300132
出乎意料的是制造和检验的2K燃烧棒的各种各样的阻燃结合都满足防火等级UL94V-0,或至少满足UL94V1。即使在各层都达不到这些防火等级的阻燃材料的情况中,都发现防火等级有所改善。
阻燃和非阻燃-棒(薄膜)之间的组合尤其令人感到意外。这里甚至发现UL94V0/V1的结果,其中有时最多超过总厚度3.8mm的一半的部分由非阻燃材料形成,和/或各个组件以厚度a或b两者都只达到V2。
在按照本发明的实施例14-16(表3)中组件A以厚度a至少满足V2和以厚度a+b只满足HB,组件B以厚度b具有V2且以厚度a+b具有V0或V1,然而由这两个组件形成的试棒令人意外地满足清单V0。比率a/b是≤2.5。
在按照本发明的实施例23和25(表4)中以厚度a和以厚度a+b只满足UL94清单HB。a/b的比率≤0.3。组件B以厚度a+b具有UL94清单V0或V1,由这两个组件形成的试棒令人意外地满足清单V0。
在按照本发明的实施例1-4,6-7,9-10和12(表2)和实施例18-20(表3)和26(表4)中,组件A或B的至少一个以厚度a或b只满足V2,而且这两个组件以厚度a+b满足V0或V1。由所述两个组件形成的试棒令人意外地满足清单V0。

Claims (11)

1.完全或部分注塑的多组件复合体系,所述体系具有壁厚为a+b,其包含至少一个厚度为a的组件A和至少一个厚度为b的组件B,其中
组件A是背面注塑的热塑性薄膜或是至少一层注塑的热塑性塑料,其中所述薄膜的厚度或所述一层的厚度或者,在多层情况下,组件A的层的总厚度为厚度a,和
组件B是至少一层注塑的热塑性塑料,其中所述一层的厚度,或在多层情况下,组件B的层的总厚度为厚度b,
且其中组件A和B满足下列标准之一:
1.组件A以厚度a至少满足V2和以厚度a+b只满足HB,组件B以厚度b具有V2并以厚度a+b具有V0或者V1,而且比率a/b≤2.5,优选≤1.8,特别优选≤1.2;
2.组件A以厚度a和以厚度a+b只满足HB,组件B以厚度a+b满足V0或V1,而且比率a/b≤0.3,优选≤0.2;或者
3.组件A或者B的至少之一以厚度a或b只满足V2,而这两个组件以厚度a+b满足V0或V1。
2.根据权利要求1的多组件复合体系,其中组件A以厚度a至少满足V2,且以厚度a+b只满足HB,和组件B以厚度b满足V2,并以厚度a+b满足V0或V1,且比率a/b≤2.5,优选≤1.8,特别优选≤1.2。
3.根据权利要求1的多组件复合体系,其中组件A以厚度a和以厚度a+b只满足HB,且组件B以厚度a+b满足V0或V1,而且比率a/b≤0.3,优选≤0.2。
4.根据权利要求1的多组件复合体系,其中组件A或B的至少之一以厚度a或b只满足V2,而这两个组件以厚度a+b满足V0或V1。
5.根据权利要求1-4中任一项的多组件复合体系,其中组件A和组件B由注塑的热塑性塑料组成。
6.根据权利要求1-4中任一项的多组件复合体系,其中所述复合体系涉及背面注塑薄膜,而且所述薄膜是组件A。
7.根据权利要求1-6中任一项的多组件复合体系,其中组件A和B的至少之一含有聚碳酸酯、共聚碳酸酯或共聚酯碳酸酯。
8.根据权利要求1-7中任一项的多组件复合体系,其中至少组件B含有至少一种阻燃添加剂。
9.完全或部分注塑的多组件复合体系的制造方法,其包括下列步骤:
a.选择适用于组件A和B的材料,以使其满足下列标准之一:
1.)组件A以厚度a至少满足V2并以厚度a+b只满足HB,组件B以厚度b具有V2和以厚度a+b具有V0或V1,且比率a/b≤2.5,优选≤1.8,特别优选≤1.2;
2.)组件A以厚度a和以厚度a+b只满足HB,组件B以厚度a+b满足V0或V1,而且比率a/b≤0.3,优选≤0.2;或者
3.)组件A或B的至少之一以厚度a或b只满足V2,且这两个组件以厚度a+b满足V0或V1。
b.通过双组件或者多组件注塑方法,通过用组件B对由组件A组成的薄膜进行背面注塑,或者通过用包含组件A的涂层涂覆由组件B组成的注塑件,制造完全或部分注塑的复合体系。
10.根据权利要求9的方法,其特征在于,在步骤b)中的制造方法是双组件或者多组件注塑方法。
11.根据权利要求9的方法,其特征在于,在步骤b)中的制造方法是用组件B背面注塑由组件A组成的薄膜。
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