CN1745130A - 含有苧烯作为发泡助剂的可发泡的共聚体树脂颗粒 - Google Patents
含有苧烯作为发泡助剂的可发泡的共聚体树脂颗粒 Download PDFInfo
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- CN1745130A CN1745130A CNA2004800029767A CN200480002976A CN1745130A CN 1745130 A CN1745130 A CN 1745130A CN A2004800029767 A CNA2004800029767 A CN A2004800029767A CN 200480002976 A CN200480002976 A CN 200480002976A CN 1745130 A CN1745130 A CN 1745130A
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
- C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/16—Making expandable particles
- C08J9/18—Making expandable particles by impregnating polymer particles with the blowing agent
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Abstract
本发明提供了共聚体树脂颗粒,该共聚体颗粒包含20%至80%重量的聚烯烃如聚乙烯,和80%至20%重量的原位聚合的乙烯基芳香族树脂,如聚苯乙烯或聚(苯乙烯-丙烯酸丁酯),并形成了聚烯烃与乙烯基芳香族树脂颗粒的互穿网络。为了得到改进的膨胀性和令人愉快的香味,用挥发性的烃发泡剂和苧烯如d-苧烯浸渍所述的共聚体颗粒,所述苧烯以100重量份的所述共聚体颗粒计为约0.1至约5重量份,优选0.1至1重量份。
Description
发明背景
1.
技术领域
本发明涉及包含聚烯烃如聚乙烯和聚合的乙烯基芳香族树脂的可发泡的共聚体树脂颗粒。更具体而言,本发明涉及包含以颗粒重量计约1.5%至约20%重量的挥发性发泡剂,以及作为增塑剂或发泡助剂的、以100重量份的可发泡的共聚体树脂颗粒计0.1至约5重量份,优选0.1至1.0重量份的苧烯的可发泡的共聚体树脂颗粒。
2.
背景技术
在聚乙烯颗粒中聚合乙烯基芳香族单体如苯乙烯是已知的。授权给Kitamori并转让给Sekisui Kaseihin Kabushiki Kaisha的美国专利3,959,189公开了一种生产聚乙烯树脂颗粒的方法,该方法包括在水性介质中悬浮聚乙烯树脂颗粒,向所述的悬浮体中加入以颗粒重量计30至100%重量的苯乙烯单体及用于使单体聚合的引发剂,和在所述的聚乙烯树脂颗粒内聚合所述单体。然后,可以通过用发泡剂浸渍颗粒来使它们变为可发泡性的,优选在苯乙烯单体聚合及聚乙烯树脂交联后。发泡剂通常为挥发性的发泡剂,即脂肪族烃,例如正丙烷、正丁烷、异丁烷、正戊烷、异戊烷、正己烷和新戊烷;或脂环族烃,如环丁烷和环戊烷;以及卤代烃,如氯代甲烷、氯乙烷、二氯甲烷、三氯氟甲烷、二氯氟甲烷、二氯二氟甲烷、一氯二氟甲烷和二氯四氟乙烷等,量以聚乙烯-聚苯乙烯树脂颗粒重量计为5至20%重量。
授权给Richard B.Allen等人并转让给General Electric,Co.的美国专利4,782,098公开了可发泡的共聚体珠粒,所述共聚体珠粒包含聚苯醚树脂及聚合的乙烯基芳香族单体,该芳香族单体在聚合催化剂的存在下聚合,以形成共聚的热塑性树脂珠粒。一种挥发性发泡剂被在压力下引入到所述的热塑性树脂珠粒中。
授权给Kajimura等人并转让给Sekisui Kaseihin KogyoKabushiki Kaisha的美国专利4,303,756和4,303,757公开了一种生产可膨胀的热塑性树脂珠粒的方法,其中乙烯基芳香族单体被聚合到聚丙烯的骨架上面,并且发泡剂被加入所述的热塑性树脂珠粒中。所述的发泡剂与前述美国专利4,782,098中所教导的相同。
授权给Ozutsumi等人并转让给Sekisui Kaseihin KogyoKabushiki Kaisha的美国专利4,429,059公开了一种生产可发泡的聚烯烃颗粒的方法,该方法包括向100重量份的聚烯烃颗粒中加入3至15重量份的发泡剂与0.5至5重量份的发泡助剂的混合物。第2栏63-66行教导到,所述的发泡助剂导致颗粒内部处于塑性状态,从而促进了颗粒的发泡。作为增塑剂使用的代表性的发泡助剂有苯、甲苯、二甲苯、三氯乙烯、全氯乙烯、环己烷、四氯化碳等。
现有技术的颗粒被用发泡剂浸渍,或在前述美国专利4,429,059的情况下被发泡剂和发泡助剂浸渍。所述的发泡剂通常是“挥发性”的烃,而所述的发泡助剂通常被认为是危险的空气污染物(HAPS),如在1990年“联邦清洁空气法案修正案”第112部分中所述的。在颗粒的处理和发泡过程中,发泡剂和发泡助剂通常会散发到环境中。颗粒的生产者和加工者可能都被迫减少所述的排放至可接受的控制水平,这将涉及到对用于收集排放的烃的复杂设备的投资。在给定时间内生产的可发泡的颗粒和发泡制品的数目将取决于在给定地理区域内烃排放的允许的控制水平。对于前述美国专利4,429,059中所教导的发泡助剂类型如甲苯、苯等,另一个缺点是在可发泡的颗粒加工过程中有关的令人不快的气味。
希望使用不被认为是危险的空气污染物,并且没有令人不快的气味,同时还提供了优异的可发泡性和模制熔化性的发泡助剂。
已知使用d-苧烯来改进主要含苯乙烯的可发性聚合物的可发泡性。实例有日本Sekisui Plastics的JP 08208877(1996年8月13日向公众公开),日本Achilles Corp.的JP 07309968(2000年7月10日授权为JP 30609839);以及Asahi Chemical Industry Co.,Ltd.的JP 93202250A(Hei5-202250)。
在美国专利5,222,378;EP 0 701 589B1(道化学公司,该申请同时也是WO 94/19383(PCT/US94/06112));以及美国专利4,959,412(Arizona Chemical Company)中了进一步示范了在苯乙烯中使用苧烯作为增塑剂或作为增粘剂。
JP 11080412(Achilles Corporation)(名称为″Heat-resistantcellular styrene polymer-polyoxyphenylene″)教导了苧烯在苯乙烯类树脂与聚苯醚基树脂的共混物中的应用。其摘要教导到,颗粒含有3-15份挥发性发泡剂浸渍的聚合物颗粒,所述颗粒由50-90份的苯乙烯聚合物和10-50份的聚苯醚及0.1-5份(以100份聚合物颗粒计)的苧烯组成。含聚苯乙烯、聚苯醚、亚乙基双硬脂酰胺、戊烷及苧烯的组合物被挤出、造粒和模制,以给出具有短的模制循环时间和表现出了良好的耐热性的测试制件。据称,在基础树脂中加入苧烯可以改进基础树脂的发泡能力,同时模制时间及冷却时间可以被缩短。
现有技术没有提供包含聚烯烃如聚乙烯和原位聚合的乙烯基芳香族树脂,形成聚烯烃与乙烯基芳香族树脂颗粒互穿网络的共聚体颗粒,所述颗粒含有不被认为是危险的空气污染物;被认为具有令人愉悦的气味;并且作为发泡助剂或增塑剂比现有技术的那些发泡助剂更有效的发泡助剂。
发明简述
本发明克服了现有技术的上述缺点。
本发明提供可发泡的共聚体树脂颗粒,该颗粒包含约20%至约80%重量的聚烯烃,和约80%至约20%重量的聚合的乙烯基芳香族树脂,它们形成了聚烯烃与乙烯基芳香族树脂颗粒的互穿网络。所述可发泡的共聚体树脂颗粒用挥发性的烃发泡剂及作为发泡助剂或增塑剂的苧烯浸渍。苧烯不被认为是危险的空气污染物,具有令人愉快的柑桔气味,并且改进了所述共聚体颗粒的可发泡性。
所述可发泡的共聚体颗粒可以通过如下步骤来生产:在水性介质中悬浮聚烯烃颗粒;优选向聚烯烃颗粒及以聚烯烃颗粒的重量计约25%至约400%,优选80%至400%重量的乙烯基芳香族单体或单体混合物中加入交联剂;加入聚合引发剂以使乙烯基芳香族单体或单体混合物在聚烯烃颗粒内聚合,形成聚烯烃与乙烯基芳香族树脂颗粒的互穿网络。用以共聚体颗粒的重量计量为约1.5%至约20%重量,优选1.5%至15%重量,更优选5%至15%重量的挥发性烃发泡剂,和以100重量份共聚体颗粒计量为约0.1至约5份,优选0.1至约1.0份的苧烯浸渍所述共聚体颗粒。
根据本发明的另一个方面,提供了可发泡的共聚体树脂颗粒,该颗粒包含:优选交联的、约20%至约80%重量的聚烯烃,和约80%至20%重量的聚合的乙烯基芳香族树脂,它们形成了聚烯烃与乙烯基芳香族树脂颗粒的互穿网络;以共聚体颗粒的重量计量为约1.5%至约20%重量,优选1.5%至15%重量,更优选5%至15%重量的发泡剂;和作为增塑剂或发泡助剂的约0.1至约5份,优选0.1至约1份(以100份共聚体颗粒计)的苧烯。
本发明中苧烯的使用使得在共聚体颗粒加工中发泡剂的用量可以减少,并且因此在颗粒本身中发泡剂的含量被降低。当挥发性的烃发泡剂如戊烷被用作发泡剂时,考虑到在上文现有技术部分中所讨论的环境问题,例如发泡剂排放的问题,这一点特别重要。
在一个优选的实施方案中,所述聚合的乙烯基芳香族树脂为乙烯基芳香族均聚物,优选聚苯乙烯,或聚合的乙烯基芳香族共聚物,优选苯乙烯-丙烯酸丁酯共聚物,并且所述聚烯烃为聚乙烯。
因此,为了形成与现有技术相比至少物理性能得到了改进的制品,本发明的一个目的是提供含有发泡剂和作为发泡助剂或增塑剂的苧烯的可发泡的共聚体树脂颗粒,发泡剂与苧烯的组合导致所述树脂颗粒的改进的可发泡性。
本发明另一个目的是消除与含有危险的空气污染物,如颗粒在发泡剂中浸渍时作为发泡助剂的甲苯、苯等的颗粒通常相伴的令人不快的气味。
从以下的描述及所附的权利要求书,本领域的技术人员将会更好地理解和了解本发明的这些和其它的目的。
发明详述
本发明的共聚体颗粒包括聚烯烃和原位聚合的乙烯基芳香族树脂,它们形成了聚烯烃与乙烯基芳香族树脂颗粒的互穿网络。所述的共聚体颗粒被发泡剂与作为增塑剂或发泡助剂的苧烯所浸渍。
这种共聚体颗粒可以通过转让给Sekisui Kaseihin KogyoKabushiki Kaisha的前述美国专利3,959,189和美国专利4,168,353(Kitamori)中所描述的方法得到。所述方法包括将聚烯烃颗粒和乙烯基芳香族单体或单体混合物悬浮在水性悬浮体中,和使所述单体或单体混合物在聚烯烃颗粒内聚合。通过引用而将美国专利3,959,189和4,168,353的教导全部结合在此,除了在浸渍步骤中所使用的溶剂,该溶剂的实例包括甲苯、苯、1,2-二氯丙烷等。本发明特别是为了消除HAPS化学品,例如作为溶剂或发泡助剂的甲苯和苯的使用。
这里所使用的术语“聚烯烃”是一种塑料,其从至少一种烯烃单体,例如乙烯、丙烯、丁烯、己烯或辛烯制备。在一个优选的实施方案中,所述的聚烯烃是聚乙烯。
这里使用的术语“聚乙烯”不仅包括乙烯均聚物,也包括由至少50摩尔%、优选至少70摩尔%的乙烯单元与少部分的可与乙烯共聚合的单体所组成的乙烯共聚物,和至少50%重量、优选至少60%重量的乙烯均聚物或共聚物与其它聚合物的共混物。
可与乙烯共聚合的单体的实例有醋酸乙烯酯、氯乙烯、丙烯、丁烯、己烯、丙烯酸及其酯、甲基丙烯酸及其酯。可与乙烯均聚物或共聚物共混的其它聚合物可以是任何与其相容的聚合物。实例有聚丙烯、聚丁二烯、聚异戊二烯、聚氯丁二烯、氯化聚乙烯、聚氯乙烯、苯乙烯/丁二烯共聚物、醋酸乙烯酯/乙烯共聚物、丙烯腈/丁二烯共聚物、氯乙烯/醋酸乙烯酯共聚物等。
可以有利地用于本发明中的聚乙烯树脂的实例有低-、中-和高-密度聚乙烯、乙烯/醋酸乙烯酯共聚物、乙烯/丙烯共聚物、聚乙烯和聚丙烯的共混物、聚乙烯和乙烯/醋酸乙烯酯共聚物的共混物、聚乙烯与乙烯/丙烯共聚物的共混物。也可以使用乙烯-丙烯酸丁酯的共聚物和乙烯-甲基丙烯酸甲酯的共聚物。
以共聚体树脂颗粒的重量计,聚烯烃在本发明的共聚体树脂颗粒中的量为约20%至约80%重量,优选20%至55%重量。
以共聚体树脂颗粒的重量计,聚合的乙烯基芳香族树脂在本发明的共聚体树脂颗粒中的量为约20%至约80%重量,优选约45%至约80%重量。
乙烯基芳香族树脂可以是聚合的单体,或者所述树脂可以是乙烯基芳香族共聚物。乙烯基芳香族单体的实例有苯乙烯、α-甲基苯乙烯、乙基苯乙烯、氯苯乙烯、溴苯乙烯、乙烯基甲苯、乙烯基苯及异丙基二甲苯。这些单体可以单独使用或混合使用。
所述乙烯基芳香族共聚物可以与转让给Sekisui Kaseihin KogyoKabushiki Kaisha的美国专利4,049,594(Ideka)中所公开的那些相似。这些共聚物是通过苯乙烯单体与例如如下单体共聚合而制备的苯乙烯共聚物:1,3-丁二烯、丙烯酸烷基酯(例如丙烯酸丁酯、丙烯酸乙酯和丙烯酸-2-乙基己酯)、甲基丙烯酸烷基酯(例如甲基丙烯酸甲酯、甲基丙烯酸乙酯、甲基丙烯酸丁酯和甲基丙烯酸-2-乙基己酯)、丙烯腈、醋酸乙烯酯、α-甲基乙烯、二乙烯基苯、马来酸二甲酯和马来酸二乙酯。
优选地,所述乙烯基芳香族树脂为聚苯乙烯或苯乙烯-丙烯酸丁酯的共聚物。
通常,所述共聚体树脂颗粒按如下方式形成:将聚烯烃颗粒分散在水性介质中,所述水性介质是通过添加以水的重量计0.01至5%,优选2至3%重量的悬浮剂例如水溶性高分子量材料,如聚乙烯醇或甲基纤维素,或轻微水溶性的无机材料,如磷酸钙或焦磷酸镁,及皂类如十二烷基苯磺酸钠来制备的,和将乙烯基芳香族单体加入所述悬浮体中,并在聚烯烃颗粒内聚合。
基本上可以采用任何传统已知的和通常使用的、用于乙烯基芳香族单体聚合的悬浮剂。这些悬浮剂是本领域中所公知的,并且可以由本领域的技术人员自由选择。开始时,以重量计,水的量通常为水性悬浮体中所采用的原料聚烯烃颗粒量的0.7至5倍,优选3至5倍,逐渐地,聚合物颗粒与水的比可以达到约1∶1。
被吸收到聚烯烃颗粒中的乙烯基芳香族单体的聚合使用引发剂来进行。
适合用于乙烯基芳香族单体悬浮聚合的引发剂通常以约0.05至2%重量,优选0.1至1%重量的量使用,以所述乙烯基芳香族单体重量计。适宜的引发剂的实例包括有机过氧化物,例如过氧化苯甲酰、过氧化月桂酰、过苯甲酸叔丁酯和过新戊酸酯叔丁酯,以及偶氮化合物,例如偶氮二异丁腈和偶氮二(二甲基戊腈)。
这些引发剂可以单独使用,或者两种或更多种引发剂组合使用。优选的是所述引发剂溶解在乙烯基芳香族单体中,而所述单体被吸收到聚烯烃颗粒中。这与前述美国专利3,959,189和4,168,353中的不同,在这些美国专利中引发剂被溶解到溶剂如甲苯、苯和1,2-二氯丙烷中。本发明不使用这些溶剂。
当乙烯基芳香族单体的原位聚合结束时,聚合的乙烯基芳香族树脂均匀地分散在聚烯烃颗粒的内部。
优选使聚烯烃颗粒交联。优选地,该交联在发泡剂和苧烯浸渍之前,与聚烯烃颗粒中乙烯基芳香族单体的聚合同时进行。因此要使用交联剂。这样的交联剂包括二叔丁基过氧化物、叔丁基枯基过氧化物、二枯基过氧化物、α,α-二(叔丁基过氧基)-对-二异丙苯、2,5-二甲基-2,5-二(叔丁基过氧基)-己炔-3、2,5-二甲基-2,5-二(苯甲酰基过氧基)-己烷和碳酸叔丁基过氧基异丙基酯。通过将所述交联剂以悬浮于水中的聚烯烃颗粒重量计约0.1至2%重量,优选0.5至1%重量的量溶解,这些交联剂与乙烯基芳香族单体一起被吸收到聚烯烃颗粒中。在前述美国专利3,959,189中给出了所述交联剂和将所述交联剂吸收到聚烯烃中的方式的进一步的细节。
所得到的共聚体可以被用作生产发泡制品的原料。发泡剂和苧烯被引入共聚体树脂颗粒中,以形成可发泡的或可膨胀的共聚体颗粒,这些共聚体颗粒又可以被用来模制泡沫制品。
发泡剂应当具有低于聚烯烃软化点的沸点,并且在室温(约20℃至30℃)和常压(约大气压)下应当是气体或液体。发泡剂在本领域中是众所周知的,并且通常沸点为-42℃至80℃,更通常是-10℃至36℃。适宜的烃发泡剂包括脂肪族烃,例如正丙烷、正丁烷、异丁烷、正戊烷、异戊烷、正己烷和新戊烷;脂环族烃,例如环丁烷和环戊烷;和卤代烃,例如氯代甲烷、氯乙烷、二氯甲烷、三氯氟甲烷、二氯氟甲烷、二氯二氟甲烷、一氯二氟甲烷和二氯四氟乙烷等。这些发泡剂可以单独使用,或混合使用。如果以混合物形式使用在室温和常压下为气体的正丁烷、氯乙烷和二氯四氟乙烷,可以实现发泡至低的体积密度。在前述美国专利3,959,180中教导了挥发性发泡剂的具体种类。通常,所述的发泡剂选自正戊烷、异戊烷、新戊烷、环戊烷,及其混合物。
所述发泡剂的量为约1.5%至约20%重量,优选约1.5%至15%重量,更优选5%至15%重量,以共聚体颗粒的重量计。
苧烯与所述发泡剂组合使用,并且如上面所述的,在本发明中起到增塑剂或发泡助剂的作用。苧烯是单萜烃,广泛存在于植物世界中。已知的类型有d-苧烯、1-苧烯和d1-苧烯。柑橘类水果的皮中含有d-苧烯,并且d-苧烯被用作食品添加剂中的香味剂;其沸点为约176℃;且其可燃性低。d-苧烯为无色的液体,具有令人愉快的桔子样香味,被批准为食品添加剂,并广泛用作香水的原料。如上所述,苧烯不是危险的空气污染物。
在本发明中,苧烯被用来替代作为前述美国专利4,429,059中所公开的发泡助剂的苯、甲苯等。苧烯的量为每100重量份可发泡的共聚体树脂颗粒约0.1至5重量份,优选0.1至约1重量份。
本发明的共聚体颗粒可以方便地按如下方法生产:在第一反应器中,将聚烯烃颗粒悬浮在含分散剂的水性介质中。所述的分散剂可以是聚乙烯醇、甲基纤维素、磷酸钙、焦磷酸镁、碳酸钙、磷酸三钙等。所采用的分散剂的量为0.01至5%重量,基于水的量计。可以将表面活性剂加入所述水性介质中。通常,表面活性剂被用来降低悬浮体的表面张力,并帮助混合物中水/乙烯基芳香族单体在引发剂及蜡(如果使用蜡的话)混合物中乳化。适宜的蜡是亚乙基双硬脂酰胺。水性介质通常在例如12至20小时的时间内被加热至乙烯基芳香族单体可以聚合的温度,即约60℃至约120℃。在这12至20小时时间内,乙烯基芳香族单体、乙烯基芳香族聚合引发剂及交联剂被加入所得到的含分散在水性介质中的聚烯烃颗粒的悬浮体中。这些材料可以一次全部加入,或者逐渐地以单独的部分加入。
将所述共聚体颗粒酸化、脱水、筛分,并随后加入第二反应器中,在此用发泡剂和苧烯浸泡所述的颗粒。
通过使共聚体颗粒悬浮在水性介质中,向所得到的悬浮体中加入发泡剂和苧烯,并在优选约40℃至80℃的温度下搅拌来进行浸渍步骤。发泡剂和苧烯可以被掺混在一起,然后加入共聚体颗粒中,或者可以分别加入共聚体颗粒中。
或者,发泡剂和苧烯可以在聚合过程中或之后加入第一反应器中。
以上方法描述了共聚体颗粒浸渍的湿法工艺。或者,所述共聚体颗粒可以通过无水工艺来浸渍,类似于前述美国专利4,429,059第4栏第20-36行中所教导的,通过引用而将所述教导全部内容结合在此。
所述共聚体树脂颗粒还可以包含抗静电剂;阻燃剂;着色剂或染料;填料材料;其它添加剂如链转移剂,适宜的实例包括C2-15的烷基硫醇,如正十二烷基硫醇、叔-十二烷基硫醇、叔丁基硫醇和正丁基硫醇,以及其它的试剂如五苯基乙烷和α-甲基苯乙烯的二聚体;及成核剂,如聚烯烃蜡,即聚乙烯蜡。
以下实施例的目的是帮助对本发明的理解,然而,这些实施例决不应当被理解为对本发明范围的限制。
实施例
将85磅由30%重量的聚乙烯及70%重量的在聚乙烯颗粒内原位聚合的苯乙烯-丙烯酸丁酯共聚物组成的共聚体颗粒加入用于浸渍的25加仑的反应器中。该反应器中含有93磅的去离子水,及5克CalsoftF90(十二烷基苯磺酸钠)表面活性剂。所述共聚体颗粒根据前述美国专利3,959,189中所教导的方法生产。0.35%重量的得自FloridaChemical Company、工业级(纯度为95%)的d-苧烯和13%重量的异戊烷被分别加入反应器中。以200rpm的速度搅拌反应器的内含物,并将其加热至50℃约4小时。
所得到的可发泡颗粒的可膨胀性通过最小体积密度来测量,所述最小体积密度是在颗粒一次通过TRI 502连续蒸汽膨胀器时被处理来实现的。与现有技术的共聚体颗粒相比,所得到的颗粒具有更令人愉快的气味,即桔子花的香味。
将实施例中所生产的发泡颗粒干燥,然后模制成24英寸×24英寸×2英寸的矩形样品。机器是Kohler General KG 606型蒸汽模压机。物理性能按照ASTM D3575所述的标准测量和/或检验。在下表中显示了这些性能。在表中,本发明的含d-苧烯的共聚体颗粒与使用乙苯作为发泡助剂的现有技术的共聚体颗粒进行了对比。
表
可发泡性总结
(发泡剂的种类和量对于两种情况都相同)
发泡助剂 | 量,pph(每100重量份聚合物的重量份数) | 可实现的最小密度,pcf |
乙苯 | 0.50 | 1.20 |
d-苧烯 | 0.35 | 1.15 |
泡沫材料的物理性能
(在1.25pcf的泡沫材料密度下)
发泡助剂 | 乙苯(EB) | d-苧烯 | |||
性能 | 数值 | 数值 | EB标准物的% | ||
压缩强度@10%变形,psi | 12.0 | 14.2 | 118 | ||
压缩强度@25%变形,psi | 15.5 | 17.6 | 114 | ||
弯曲强度@5%应变,psi | 26.9 | 26.9 | 100 | ||
撕裂强度,磅/英寸 | 6.6 | 7.4 | 112 | ||
吸收冲击的性能2-5次冲击的平均值,1.25pcf的泡沫密度,数值为以G为单位的减速(越低越好) | |||||
发泡助剂 | 1.0psi的静态应力 | 2.0psi的静态应力 | |||
18英寸落下 | 30英寸落下 | 18英寸落下 | 30英寸落下 | ||
乙苯 | 33.4 | 58.7 | 45.0 | 113.8 | |
d-苧烯 | 33.0 | 55.0 | 40.8 | 104.4 |
从表中可以看出,本发明的共聚体颗粒可以使用更少量的发泡助剂,即0.35pph(本发明)对0.50pph(对于使用乙苯作为发泡助剂的颗粒),并且可以得到与现有技术的颗粒相比更低的最小可实现密度,即,本发明的共聚体颗粒为1.15磅/立方英尺(pcf),而现有技术使用乙苯的颗粒为1.20磅/立方英尺(pcf)。而且,与使用乙苯作为发泡助剂的常规共聚体颗粒的性能相比,本发明使用d-苧烯的共聚体颗粒的性能数值表现出了改进。
尽管已经结合具体的实施方案特别阐述了本发明,但应该理解,本发明的众多的变体现在变得可以实现,并且在本发明的范围内。因此,本发明仅由现在所附的权利要求书的范围和精神来广泛地解释和限制。同样,尽管结合本发明的共聚体树脂颗粒和生产本发明的这些颗粒的方法使用了术语“一种乙烯基芳香族单体”和“多种乙烯基芳香族单体”,应当理解,这些术语可以分别与“一种乙烯基芳香族共聚物”及“多种乙烯基芳香族共聚物”互换。
Claims (18)
1.可发泡的共聚体树脂颗粒,包含:
形成聚烯烃与乙烯基芳香族树脂颗粒互穿网络的约20%至约80%重量的聚烯烃和约80%至约20%重量的聚合的乙烯基芳香族树脂;
浸渍在所述的共聚体树脂颗粒中的约1.5%重量至约20%重量的发泡剂和基于100重量份的所述共聚体颗粒计约0.1至约5重量份的苧烯。
2.权利要求1的可发泡的共聚体树脂颗粒,其中以所述共聚体颗粒的重量计,所述聚合的乙烯基芳香族树脂的所述重量为约45%至约80%重量,所述聚烯烃的所述重量为约20%至约55%重量。
3.权利要求1的可发泡的共聚体树脂颗粒,其中所述的乙烯基芳香族树脂选自乙烯基芳香族均聚物和乙烯基芳香族共聚物,该乙烯基芳香族树脂在所述的聚烯烃颗粒中聚合。
4.权利要求3的可发泡的共聚体树脂颗粒,其中所述的乙烯基芳香族树脂由乙烯基芳香族共聚物组成。
5.权利要求3的可发泡的共聚体树脂颗粒,其中所述的乙烯基芳香族共聚物是苯乙烯与丙烯酸丁酯的共聚物。
6.权利要求3的可发泡的共聚体树脂颗粒,其中所述的乙烯基芳香族树脂由乙烯基芳香族均聚物组成。
7.权利要求6的可发泡的共聚体树脂颗粒,其中所述的乙烯基芳香族均聚物是苯乙烯。
8.权利要求1的可发泡的共聚体树脂颗粒,其中所述的发泡剂选自正丙烷、正丁烷、异丁烷、正戊烷、异戊烷、正己烷、新戊烷、环丁烷、环戊烷、氯代甲烷、氯乙烷、二氯甲烷、三氯氟甲烷、二氯氟甲烷、二氯二氟甲烷、一氯二氟甲烷和二氯四氟乙烷,及它们的混合物。
9.权利要求8的可发泡的共聚体树脂颗粒,其中所述的发泡剂选自正戊烷、异戊烷、新戊烷、环戊烷,及它们的混合物。
10.权利要求1的可发泡的共聚体树脂颗粒,其中所述的聚烯烃是聚乙烯。
11.权利要求1的可发泡的共聚体树脂颗粒,其中所述的苧烯选自d-苧烯、l-苧烯和dl-苧烯。
12.权利要求11的可发泡的共聚体树脂颗粒,其中所述的苧烯为d-苧烯。
13.权利要求1的可发泡的共聚体树脂颗粒,其中所述的苧烯的量为约0.1至1重量份,基于100重量份的所述共聚体颗粒计。
14.一种具有至少改进的物理性能的发泡制品,由权利要求1的可发泡的共聚体树脂颗粒生产。
15.一种形成权利要求1的可发泡的共聚体树脂颗粒的方法,该方法包括如下步骤:将所述的发泡剂与所述的苧烯混合在一起以形成混合物,和在所述的共聚体树脂颗粒的浸渍步骤中将所述混合物加入所述的共聚体树脂颗粒中。
16.一种形成权利要求的可发泡的共聚体树脂颗粒的方法,该方法包括如下步骤:在所述共聚体树脂颗粒的浸渍步骤中将所述的发泡剂与所述的苧烯分别加入所述的共聚体树脂颗粒中。
17.权利要求15的方法,其中所述的聚烯烃为聚乙烯,所述的乙烯基芳香族树脂为聚苯乙烯。
18.权利要求16的方法,其中所述的聚烯烃为聚乙烯,所述的乙烯基芳香族树脂为聚苯乙烯。
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US44276103P | 2003-01-27 | 2003-01-27 | |
US60/442,761 | 2003-01-27 |
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US (1) | US6908949B2 (zh) |
EP (1) | EP1587861B1 (zh) |
JP (1) | JP2006515648A (zh) |
KR (1) | KR20050104355A (zh) |
CN (1) | CN100339423C (zh) |
AT (1) | ATE553147T1 (zh) |
AU (1) | AU2004209533B2 (zh) |
BR (1) | BRPI0406930B8 (zh) |
CA (1) | CA2513266C (zh) |
MX (1) | MXPA05007777A (zh) |
NO (1) | NO20053653L (zh) |
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CN101970554B (zh) * | 2008-03-13 | 2013-06-05 | 巴斯夫欧洲公司 | 基于聚烯烃/苯乙烯聚合物混合物的弹性模制泡沫 |
CN102341442A (zh) * | 2009-03-05 | 2012-02-01 | 巴斯夫欧洲公司 | 基于聚烯烃/苯乙烯聚合物混合物的弹性颗粒泡沫材料 |
CN102341442B (zh) * | 2009-03-05 | 2013-06-05 | 巴斯夫欧洲公司 | 基于聚烯烃/苯乙烯聚合物混合物的弹性颗粒泡沫材料 |
CN108864468A (zh) * | 2018-05-30 | 2018-11-23 | 天津斯坦利新型材料有限公司 | 可发性聚苯乙烯材料及其制备方法和应用 |
CN108864468B (zh) * | 2018-05-30 | 2021-10-26 | 天津斯坦利新型材料有限公司 | 可发性聚苯乙烯材料及其制备方法和应用 |
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BRPI0406930A (pt) | 2006-01-03 |
EP1587861B1 (en) | 2012-04-11 |
NO20053653D0 (no) | 2005-07-27 |
NO20053653L (no) | 2005-08-25 |
CA2513266A1 (en) | 2004-08-19 |
US6908949B2 (en) | 2005-06-21 |
AU2004209533B2 (en) | 2008-10-02 |
ATE553147T1 (de) | 2012-04-15 |
WO2004069917A3 (en) | 2004-09-23 |
PL209097B1 (pl) | 2011-07-29 |
WO2004069917A2 (en) | 2004-08-19 |
CA2513266C (en) | 2012-01-03 |
JP2006515648A (ja) | 2006-06-01 |
US20040152795A1 (en) | 2004-08-05 |
EP1587861A2 (en) | 2005-10-26 |
PL377254A1 (pl) | 2006-01-23 |
CN100339423C (zh) | 2007-09-26 |
EP1587861A4 (en) | 2006-03-22 |
BRPI0406930B1 (pt) | 2014-08-26 |
MXPA05007777A (es) | 2005-09-30 |
KR20050104355A (ko) | 2005-11-02 |
BRPI0406930B8 (pt) | 2022-08-02 |
AU2004209533A1 (en) | 2004-08-19 |
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