CN104837902A - 具有改进的柔性的可膨胀的聚合物组合物及相应的制备工艺 - Google Patents
具有改进的柔性的可膨胀的聚合物组合物及相应的制备工艺 Download PDFInfo
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- CN104837902A CN104837902A CN201380063570.9A CN201380063570A CN104837902A CN 104837902 A CN104837902 A CN 104837902A CN 201380063570 A CN201380063570 A CN 201380063570A CN 104837902 A CN104837902 A CN 104837902A
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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Abstract
本发明涉及聚合物组合物,其包含:a)相对于总组合物计算的、按重量计范围从50%至99%的量的乙烯基芳香族聚合物和/或共聚物,b)相对于总组合物计算的、按重量计范围从1%至50%的量的聚烯烃或与酯的相应的共聚物,c)相对于(a)+(b)的总和计算的、按重量计范围从0.01%至40%的量的与a.乙烯基芳香族聚合物接枝的烯属弹性体,d)相对于(a)+(b)+(c)的总和计算的、按重量计范围从1%至10%的量的膨胀剂。
Description
本发明涉及包含具有增强的柔性的乙烯基芳香族聚合物和/或共聚物的可膨胀的聚合物组合物,以及用于所述组合物的制备的工艺。
在本专利申请中,呈现于本文中的所有操作条件应当被认为是优选的条件,即使没有清楚地声明。
为了本发明的目的,术语“包含(comprising)”或“包括(including)”也包括术语“由…组成(consisting of)”或“基本上由…组成(essentiallyconsisting of)”。
为了本发明的目的,除非另有规定,否则范围的定义始终包括极值。
基于聚苯乙烯的膨胀泡沫是坚硬的且因此不适合于包装领域中的许多应用。这些是具有闭孔的泡沫且因此其低弹性表现出在许多应用中的相当大的缺点,因为其不能对包装的物品提供充分的保护以对抗冲击。以基于聚苯乙烯的泡沫模制的终产品也易受破坏,即使是由于小的变形,由于遭受的损害而阻止其随后的使用。
苯乙烯聚合物与聚烯烃和可能的相容性试剂的可膨胀共混物在本领域中是已知的。例如氢化的苯乙烯-丁二烯嵌段共聚物被使用(DE2,413,375、DE 2,413,408或DE 3,814,783)。并且用这些共混物获得的泡沫相对于单独地用苯乙烯聚合物制备的那些具有改进的机械性能,特别是在低温下的改进的弹性和减少的脆性。并且对诸如芳香化合物(例如甲苯)或酯的溶剂的耐化学性比苯乙烯聚合物泡沫的耐化学性更好。然而,这些共混物的可膨胀性由于其短的保存期所以是不足的,即它们迅速地失去了膨胀剂,因此使得达到需要的密度变得极其困难。
弹性泡沫的生产也是已知的,其使用通过在聚烯烃存在下在水性悬浮液中苯乙烯的聚合作用制备的互穿聚合物,从而形成包含苯乙烯聚合物和聚烯烃聚合物的互穿晶格(US 2004/0152795)。然而同样在这种情况下,膨胀剂迅速地在材料的珠的外部扩散且因此必须在低温下储存。此外,其可加工性被限制于短时期。
WO 2008/050909描述了具有核-壳结构的互穿弹性泡沫,其中在聚烯烃的壳下有互穿聚苯乙烯-聚烯烃聚合物的核。弹性和抗断裂性比聚苯乙烯的更好,并且通常地用于运输业中的包装或作为汽车中的减震器。同样在这种情况下,在室温下的保存期是短的。
已知的包含例如聚烯烃、可膨胀的互穿聚合物的弹性泡沫,与膨胀的EPS珠具有较差的相容性,即使是在以小量混合时,产生易碎的终产品。
US 2011/0065819描述了可膨胀的弹性聚合物,包含:
-1-45%的聚烯烃
-0-25%的具有低于105℃的熔点的聚烯烃
-0.1-9.9%的苯乙烯-丁二烯共聚物
-0.1-9.89%的苯乙烯-乙烯共聚物
其中分散相具有范围从1至1,500nm的直径。该产品具有最佳的弹性性能、长的保存期且与标准的EPS相容。然而,其用挤压或连续本体(continuousmass)的制备是困难的,因为由于双键,用于挤压的高温能够损害(例如通过交联)苯乙烯-丁二烯共聚物。
本发明的目标是提供可膨胀的弹性聚合物组合物,其能够保证长的保存期,具有膨胀剂的低损耗及达到低密度的容易的加工性。
为了这个目的,申请人惊喜地发现与乙烯基芳香族聚合物接枝的烯属弹性体的并入,与聚烯烃结合,给予了产生的聚合物组合物最佳的弹性性能(缓冲)。
因此本发明的实施方案涉及聚合物组合物,其包含:
a)相对于总组合物计算的、按重量计范围从50%至99%的量的乙烯基芳香族聚合物和/或共聚物,
b)相对于总组合物计算的、按重量计范围从1%至50%的量的聚烯烃或与酯的相应的共聚物,
c)相对于a)+b)的总和计算的、按重量计范围从0.01%至40%的量的与乙烯基芳香族聚合物接枝的烯属弹性体,
d)相对于a)+b)+c)的总和计算的、按重量计范围从1%至10%的量的膨胀剂。
所述组合物具有最佳的弹性、高的抗断裂性和减震性、连同良好的硬度。这些组合物的另外的优势是它们与常规的乙烯基芳香族聚合物(例如EPS)的相容性,它们能够与所述聚合物混合且容易地加工以便获得具有良好的机械性能的终产品。
详细说明
本发明的目标涉及聚合物组合物,其包含:
a)相对于总组合物计算的、按重量计范围从50%至99%的量的乙烯基芳香族聚合物和/或(共)聚物,
b)相对于总组合物计算的、按重量计范围从1%至50%的量的聚烯烃或与酯的相应的共聚物,
c)相对于a)+b)的总和计算的、按重量计范围从0.01%至40%的量的与乙烯基芳香族聚合物接枝的烯属弹性体,
d)相对于a)+b)+c)的总和计算的、按重量计范围从1%至10%的量的膨胀剂。
当组分(a)和组分(b)以范围从10至2,000nm、优选地从100至1,000nm的平均直径被分散时,获得了膨胀剂的低损耗。具有高于2,000nm的直径的分散体引起膨胀剂的更迅速的损耗。
在本文中术语乙烯基芳香族聚合物和/或共聚物(a)指的是具有范围从50,000至300,000、优选地从70,000至220,000的重均分子量(Mw)的聚合产品。所述乙烯基芳香族聚合物可以通过单体的混合物的聚合作用获得,该单体的混合物包含按重量计从50%至100%、优选地按重量计从75%至98%的一种或更多种乙烯基芳香族单体、和与乙烯基芳香族单体可共聚的、以按重量计范围从0%至50%、优选地按重量计从2%至25%的量均匀地被包入聚合物中的至少一种单体。
乙烯基芳香族单体可选自与下述通式(I)对应的那些:
其中R是氢或甲基,n是零或范围从1至5的整数,且Y是优选地选自氯或溴的卤素、或具有1至4个碳原子的烷基或烷氧基基团。具有通式(I)的乙烯基芳香族单体可选自:苯乙烯、α-甲基苯乙烯、甲基苯乙烯、乙基苯乙烯、丁基苯乙烯、二甲基苯乙烯、单-、二-、三-、四-及五-氯苯乙烯、溴苯乙烯、甲氧基苯乙烯、乙酰氧基苯乙烯。优选的乙烯基芳香族单体是苯乙烯和α-甲基苯乙烯。具有通式(I)的乙烯基芳香族单体可以被单独使用,或在与其他可共聚的单体的混合物中以按重量计至多50%、优选地按重量计从2%至25%使用。这些单体的实例是(甲基)丙烯酸、(甲基)丙烯酸的C1-C4烃基酯如丙烯酸甲酯、甲基丙烯酸甲酯、丙烯酸乙酯、甲基丙烯酸乙酯、丙烯酸异丙酯、丙烯酸丁酯、(甲基)丙烯酸的酰胺和腈如丙烯酰胺、甲基丙烯酰胺、丙烯腈、甲基丙烯腈、丁二烯、乙烯、二乙烯基苯、马来酸酐。优选的可共聚的单体是丙烯腈和甲基丙烯酸甲酯。
聚烯烃(b)以按重量计范围从1%至50%、优选地按重量计从10%至30%的量存在,以便获得最佳的弹性但是不过度地减少硬度。
可在本发明中使用的聚烯烃(b)在本领域是熟知的。其可以包括乙烯、丙烯、丁烯的所有聚合物,以及这些单体与乙烯基酯、优选地醋酸乙烯酯(EVA)、丙烯酸丁酯、丙烯酸乙酯或丙烯酸己酯的共聚物。聚乙烯指的是具有范围从0.90至0.97g/cm3的密度的任意乙烯聚合物,其中的那些被称为线性低密度聚乙烯(LLDPE)和高密度聚乙烯(HDPE)。这些聚合物在市场上以商品名被知道,例如,Versalis公司的Flexirene、Exxon公司的EscoreneLL1201(LLDPE)、Versalis公司的Riblene(LDPE)、Versalis公司的Eraclene(HDPE)。其他聚烯烃如丙烯、聚丁烯、聚甲基戊烯,及两种或更多种α-烯烃的共聚物,如例如乙烯-丙烯,可被使用。乙烯-丙烯酸酯共聚物如乙烯-醋酸乙烯酯(EVA)也可被使用。醋酸乙烯酯的含量范围可从0.5%高至40%、典型地从10%至35%变动。这些共聚物在市场上以其商品名被知道,例如Versalis公司的Greenflex。
烯属弹性体包含在其上接枝的乙烯基芳香族聚合物。乙烯基芳香族聚合物与烯属弹性体之间的摩尔比率优选地高于0.8、更优选地在1和2之间。
形成基质的烯属弹性体是具有在100℃时范围从10至150ML-4的门尼粘度的橡胶状共聚物,乙烯基芳香族聚合物被接枝在所述基质上。该橡胶状共聚物包含至少两种不同的α-单烯烃,每种具有线性烯烃链,具有至少另一种可共聚的单体。该线性链可优选地包含乙烯和丙烯;在下述烯烃之间的成对的其他组合也是可能的:乙烯、丙烯、1-丁烯、1-辛烯和其他烯烃。所述可共聚的单体一般是多烯,典型地是非共轭的二烯。
优选地α-单烯烃的一种是乙烯和另一种α-单烯烃。
乙烯相对于其他α-单烯烃的重量比通常是从20/80至80/20的范围。
特别优选的共聚物是乙烯/丙烯/非共轭二烯三元共聚物,其中非共轭二烯可以是环状或无环的,例如,优选地,5-亚甲基-e-降冰片烯(5-methylene-e-norbornene)、5-亚乙基-2-降冰片烯、5-异丙烯-2-降冰片烯、1,4-戊二烯、1,4-己二烯、1,5-己二烯、1,5-庚二烯、1,7,9-十二碳三烯(dodecatriene-1,7,9)、甲基-1,5-庚二烯、2,5-降冰片二烯、1,5-环辛二烯、二环戊二烯、四氢茚(tetrahydroindene)、5-甲基-四氢茚。二烯的含量在弹性体三元共聚物中单体二烯单元的按重量计从约2%至20%、优选地按重量计从8%至18%的范围。
就分散体来说,已经使用具有在100℃时范围从30至90的门尼粘度(ML-4),及大于5、优选地从10至40的碘值的弹性体三元共聚物获得特别令人关注的结果。用此三元共聚物获得范围从10nm至2,000nm的分散体,如先前指出的,这允许膨胀剂的分散被减少/减速。
在弹性体基质上的乙烯基芳香族聚合物的接枝反应可使用本领域已知的任何接枝技术实现。
烯属弹性体可因此与一种或更多种乙烯基芳香族单体按照熟知的聚合方法如本体、悬浮或本体-悬浮方法混合。一般地,接枝反应可以是自由基的、热的、化学的或通过辐射并且可以通过阴离子引发或通过傅克反应(Friedel-Craft)引发。在烯烃基质上的乙烯基芳香族单体的接枝技术是熟知的且在例如美国专利US 3,489,822、US 3,489,821、US 3,642,950、US3,819,765、US 3,538,190、US 3,538,191、US 3,538,192、US 3,671,608、US3,683,050、US 3,876,727、US 4,340,669中被描述。明显地,在接枝聚合作用中,不是所有的乙烯基芳香族单体都被接枝到弹性体上;一部分单体形成游离的聚合物,其与接枝的聚合物以物理状态混合物存在。接枝的乙烯基芳香族聚合物的分子量优选地几乎等于非接枝的聚合物的分子量。为了达到本发明的目标,如上所述,在接枝阶段乙烯基芳香族聚合物/烯属弹性体的摩尔比率必须高于0.8、优选地从1至2。
如在意大利专利1,007,901或在“La Chimica e l’Industria”第47卷,nr.4,1965及第59卷,nr.7,9,10,1977中所描述的,此比率可通过在不同量的引发剂、溶剂和/或链转移试剂的存在下,进行乙烯基芳香族单体在烯属弹性体上的接枝聚合而被调节。
接枝到烯烃基质上的乙烯基芳香族聚合物的分子量可影响组合物的性能;用具有高于50,000且至多500,000的分子量、且优选地具有与组分(a)的乙烯基芳香族聚合物的分子量几乎相同的分子量的、接枝到烯烃基质上的乙烯基芳香族聚合物获得就分散体来说的最好的结果。
接枝的烯属弹性体(c)在从0.01%至40%、更优选地从1%至30%的范围,且具有保证聚烯烃的最佳分散的功能和因此长的保存期。
任何能够被并入到聚合物中的膨胀剂(d)可被用于本发明中。优选地膨胀剂可以是具有范围从10℃至80℃、优选地从20℃至60℃的沸点的液体物质。优选的膨胀剂是包含3至6个碳原子的脂肪族或脂环族的烃类,如正戊烷、异戊烷、环戊烷、丁烷、异丁烷或其混合物;包含1至3个碳原子的脂肪烃的卤化衍生物,如二氯二氟甲烷、1,2,2-三氟乙烷和1,1,2-三氟乙烷;二氧化碳。
膨胀剂以按重量计在从1%至10%、优选地从4%至6%的范围的可变量存在,所述的量相对于组分(a)+(b)+(c)计算。
任何情况下,本发明的组合物目标可以以连续本体、通过挤压以及还通过悬浮或通过后注入(post-impregnation)而被制备。连续本体技术是优选的。本发明的另一个优势是通过挤压的容易的制备,因为本发明的氢化的弹性体在高温下是稳定的。
本发明的另外的目标涉及用于以连续本体制备本文中所描述和要求权利的可膨胀的组合物的工艺。所述工艺包括下述阶段:
i)如果所述聚合物和/或共聚物(a)是颗粒:
1.将所述聚合物和/或共聚物加热至高于连同按重量计范围从1%至50%的量的聚烯烃(b)、以及按重量计范围从0.01%至40%的量的接枝的烯属弹性体(c)的相应的熔点的温度,以便形成熔融态的聚合物组合物;
2.随后在所述熔融态的所述聚合物组合物中并入膨胀剂;
ii)如果所述聚合物和/或共聚物(a)已经是熔融态,则加入按重量计范围从1%至50%的量的聚烯烃(b)、按重量计范围从0.01%至40%的量的接枝的烯属弹性体(c),且然后并入膨胀剂以便形成聚合物组合物。
所有已知的膨胀技术可以被应用,从蒸汽膨胀到用热空气的膨胀技术。
在本文中所描述和要求权利的可膨胀组合物,在膨胀后形成膨胀的或模制的泡沫。
实施例
实施例1-接枝的烯属弹性体A的制备:接枝到聚苯乙烯上的EPDM
烯属弹性体A具有下述组成:按重量计50%的EPDM(在100℃时62-72ML-4的门尼粘度和18的碘值)、按重量计42%的接枝的聚苯乙烯及按重量计8%的、具有273,000的分子量(Mw)的游离的聚苯乙烯,其中在接枝的相中聚苯乙烯/弹性体的摩尔比率是1.14。在烯属弹性体A中聚苯乙烯/弹性体的摩尔比率通过首先除去全部杂质,从而仅留下聚苯乙烯(游离的及接枝的两者)和EPDM(游离的及接枝的两者)来测量。为此,将5g烯属弹性体A溶于5ml甲苯中,然后向溶液中加入3ml丙酮。随后通过缓慢加入10ml 2-异丙醇将聚合物沉淀。然后将混合物离心分离并将透明溶剂从沉淀中轻轻倒出并除去。随后通过选择沉淀的方式将游离的聚苯乙烯与EPDM及接枝的共聚物分离。为此,将首先收集的沉淀溶于5ml甲苯中。然后在搅拌下,缓慢加入7ml的甲基乙基酮/丙酮(按体积计1:1)溶液,直到制备出非常细的分散体。随后在连续搅拌下,缓慢加入大约15ml的甲醇/甲基乙基酮/丙酮(按体积计1:2:2)溶液,直到引发白色沉淀的凝聚。离心分离混合物,且从沉淀中轻轻倒出透明上清液。液体上清液包含游离的聚苯乙烯,其可以用GPC表征。沉淀既包含游离的EPDM也包含接枝在聚苯乙烯上的EPDM。接枝产品/橡胶的比率可用红外光谱测量。与聚苯乙烯接枝的橡胶的百分比(%)用统计方法测量,该统计方法使用接枝产品/橡胶的比率、EPDM橡胶的分子量和聚苯乙烯的分子量,假定游离的和接枝的聚苯乙烯具有相同的分子量。该统计方法由L.H.Tung和R.M.Wiley在Journal of Polymer Science,Polymer Physics,第11卷,第1413页,1973中描述。
实施例2-接枝的烯属弹性体B的制备:接枝到聚苯乙烯上的EPDM
烯属弹性体B具有下述组成:按重量计50%的EPDM(在100℃时62-72ML-4的门尼粘度和18的碘值)、按重量计28%的接枝的聚苯乙烯及按重量计22%的、具有207,000的分子量(Mw)的游离的聚苯乙烯,其中在接枝的相中聚苯乙烯/弹性体的摩尔比率是1.1。
对比实施例
将89.8份乙苯、852.8份苯乙烯、56.2份α-甲基苯乙烯、0.2份二乙烯苯(总计:1,000份)进料至搅拌反应器中。反应在125℃下进行且具有2小时的平均停留时间。
然后将流出的液体组分进料至第二反应器,在其中,反应在135℃下完成且具有2小时的平均停留时间。将具有72%的转化率的反应的聚合物组合物加热至240℃且随后进料至脱挥发组分装置以除去溶剂和残留单体。产生的组合物具有104℃的玻璃化转化温度、8g/10’的熔体流动指数(MFI 200℃,5kg)、200,000g/mol的分子量MW及2.8的MW/Mn比率,其中MW是重均分子量且Mn是数均分子量。
将由此获得的组合物收集到加热罐中且进料至热交换器中以将其温度降至190℃(主流)。
将500份聚苯乙烯N2982(Versalis)和500份Flexirene CM50(由Versalis出售的LLDPE)进料至双螺杆挤出机中。该聚合物组合物形成侧线馏分。
齿轮泵将熔融的聚合物组合物的压力增加至260巴。
将600份的形成聚合物侧线馏分的聚合物组合物添加到400份来自热交换器的组合物中(主流)。
用静态混合器在约190℃的温度下完成混合。然后将65份正戊烷(75%)和异戊烷(25%)的混合物增压并注入熔融态的聚合物中。
然后用静态混合元件将成分混合,持续7分钟的计算的平均时间(停留时间)。然后将组合物分配到冲模,在此处将其挤压通过大量的具有0.5mm直径的小孔,立即用一股水冷却并用一系列旋转叶片切割(根据专利申请US 2005/0123638)。粒化压力是5巴且剪切速率被选定以便获得具有1.2mm平均直径的颗粒。使用水作为喷射液且氮气作为载气。喷射的水的流速与聚合物本体的流速之间的比率是30且氮气和聚合物本体之间的比率是20。水的温度是40℃。
用离心干燥机将产生的颗粒状的珠干燥,然后用涂层覆盖。该涂层通过向每1000份干燥的颗粒状的珠添加相同的3份单硬脂酸甘油酯、1份硬脂酸锌和0.2份甘油而制备。用连续蜗杆混合器将涂层的添加剂与颗粒混合。
切割一些珠并使用电子显微镜分析以便评估分散的烯烃相的直径,其被证明是从5,000至20,000nm的范围。
然后珠被膨胀并在19g/l下模制。然后将终产品引入在70℃下的烘箱持续两天:随后收集试验样品(100x100x50mm)用于压缩和弯曲试验。
将一些膨胀的珠分成两等份。对一份分析戊烷值,且证明是5.9%。另一份在聚乙烯袋中密封并在23℃保持15天。戊烷含量相当大地下降(2%)。
根据方法EN 826,用Zwick I 2020张力计测试了机械压缩特征。在5mm/min下测试两种试验样品。10%的压缩的平均载荷证明是85Kpa(使试验样品变形的压力)。根据方法EN 12089测量的最大弯曲载荷证明是250Kpa。在这方面,见表1。
实施例3
将89.8份乙苯、852.8份苯乙烯、56.2份α-甲基苯乙烯、0.2份二乙烯苯(总计:1,000份)进料至搅拌反应器中。反应在125℃下进行且具有2小时的平均停留时间。
然后将流出的液体组分进料至第二反应器,在其中,反应在135℃下完成且具有2小时的平均停留时间。将具有72%的转化率的反应的聚合物组合物加热至240℃且随后进料至脱挥发组分装置以除去溶剂和残留单体。产生的组合物具有104℃的玻璃化转化温度、8g/10’的熔体流动指数(MFI 200℃,5kg)、200,000g/mol的分子量MW及2.8的MW/Mn比率,其中MW是重均分子量且Mn是数均分子量。
将由此获得的组合物收集到加热罐中且进料至热交换器中以将其温度降至190℃(主流)。
将333份聚苯乙烯N2982(Versalis)、500份Flexirene CM50(由Versalis出售的LLDPE)及167份接枝的烯烃苯乙烯弹性体A进料至双螺杆挤出机中。该聚合物组合物形成侧线馏分。
齿轮泵将熔融的聚合物组合物的压力增加至260巴。
将600份的形成聚合物侧线馏分的聚合物组合物添加到400份来自热交换器的组合物中(主流)。
用静态混合器在约190℃的温度下完成混合。然后将65份正戊烷(75%)和异戊烷(25%)的混合物增压并注入熔融态的聚合物中。
然后用静态混合元件将成分混合,持续7分钟的计算的平均时间(停留时间)。然后将组合物分配到冲模,在此处将其挤压通过大量的具有0.5mm直径的小孔,立即用一股水冷却并用一系列旋转叶片切割(根据专利申请US 2005/0123638)。粒化压力是5巴且剪切速率被选定以便获得具有1.2mm平均直径的颗粒。使用水作为喷射液且氮气作为载气。喷射的水的流速与聚合物本体的流速之间的比率是30且氮气和聚合物本体之间的比率是20。水的温度是40℃。
用离心干燥机将产生的颗粒状的珠干燥,然后用涂层覆盖。该涂层通过向每1000份干燥的颗粒状的珠添加相同的3份单硬脂酸甘油酯、1份硬脂酸锌和0.2份甘油而制备。用连续蜗杆混合器将涂层的添加剂与颗粒混合。切割一些珠并使用电子显微镜分析以便评估分散的烯烃相的直径,其被证明是从900至1,200nm的范围。
将一些膨胀的珠分成两等份。对一份分析戊烷值,且证明是6.2%。另一份在聚乙烯袋中密封并在23℃保持15天。戊烷含量证明是5.9%。
然后珠被膨胀并在19g/l下模制。然后将终产品引入在70℃下的烘箱持续两天:随后收集试验样品(100x100x50mm)用于压缩和弯曲试验。10%的压缩的平均载荷证明是80Kpa(使试验样品变形的压力)。根据方法EN12089测量的最大弯曲载荷证明是235Kpa。在这方面,见表1。
实施例4
重复实施例1,用等量的Greenflex HN70(由Versalis出售的30%的醋酸乙烯酯的EVA共聚物)取代聚烯烃1。切割一些珠并使用电子显微镜分析以便评估分散的烯烃相的直径,其被证明是从800至1,000nm的范围。
将一些膨胀的珠分成两等份。对一份分析戊烷值,且证明是6.1%。另一份在聚乙烯袋中密封并在23℃保持15天。戊烷含量证明是5.8%。
然后珠被膨胀并在19g/l下模制。然后将终产品引入在70℃下的烘箱持续两天:随后收集试验样品(100x100x50mm)用于压缩和弯曲试验。10%的压缩的平均载荷证明是78Kpa(使试验样品变形的压力)。根据方法EN12089测量的最大弯曲载荷证明是230Kpa。在这方面,见表1。
实施例5
重复实施例1,用等量的接枝的苯乙烯弹性体B取代接枝的苯乙烯弹性体A。切割一些珠并使用电子显微镜分析以便评估分散的烯烃相的直径,其被证明是从1,000至1,300nm的范围。
将一些膨胀的珠分成两等份。对一份分析戊烷值,且证明是6.2%。另一份在聚乙烯袋中密封并在23℃保持15天。戊烷含量证明是6.1%。
然后珠被膨胀并在19g/l下模制。然后将终产品引入在70℃下的烘箱持续两天:随后收集试验样品(100x100x50mm)用于压缩和弯曲试验。10%的压缩的平均载荷证明是82Kpa(使试验样品变形的压力)。根据方法EN12089测量的最大弯曲载荷证明是240Kpa。在这方面,见表1。
在表1中,样品的密度在19-20g/l的范围内变化,聚烯烃1是LLDPE,聚烯烃2是EVA(30%VA)。
表1
Claims (13)
1.一种聚合物组合物,其包含:
a)相对于总组合物计算的、按重量计范围从50%至99%的量的乙烯基芳香族聚合物和/或共聚物,
b)相对于总组合物计算的、按重量计范围从1%至50%的量的聚烯烃或与酯的相应的共聚物,
c)相对于(a)+(b)的总和计算的、按重量计范围从0.01%至40%的量的与乙烯基芳香族聚合物接枝的烯属弹性体,
d)相对于(a)+(b)+(c)的总和计算的、按重量计范围从1%至10%的量的膨胀剂。
2.根据权利要求1所述的聚合物组合物,其中在接枝的烯属弹性体中的所述乙烯基芳香族聚合物与所述烯属弹性体之间的摩尔比率高于0.8。
3.根据权利要求2所述的聚合物组合物,其中在所述接枝的烯属弹性体中的所述乙烯基芳香族聚合物与所述烯属弹性体之间的摩尔比率范围从1至2。
4.根据权利要求1至3中任一项所述的聚合物组合物,其中组分(a)和组分(b)以范围从10至2000nm的平均直径被分散。
5.根据权利要求1至4中任一项所述的聚合物组合物,其中所述聚烯烃以按重量计范围从1%至50%的量存在。
6.根据权利要求1至5中任一项所述的聚合物组合物,其中所述聚烯烃以按重量计范围从10%至30%的量存在。
7.根据权利要求1至6中任一项所述的聚合物组合物,其中,在所述接枝的烯属弹性体(c)中,形成所述接枝的烯属弹性体(c)的α-单烯烃之一是乙烯。
8.根据权利要求1至7中任一项所述的聚合物组合物,其中所述接枝的烯属弹性体(c)是弹性体三元共聚物,所述弹性体三元共聚物具有在100℃下被确定的在30至90的范围内变化的门尼粘度和高于5的碘值。
9.根据权利要求1至8中任一项所述的聚合物组合物,其中接枝在所述烯属弹性体上的所述乙烯基芳香族聚合物具有范围从50,000至500,000的分子量。
10.根据权利要求1至9中任一项所述的聚合物组合物,其中接枝在所述烯属弹性体上的所述乙烯基芳香族聚合物的分子量等于组分(a)的所述乙烯基芳香族聚合物的分子量。
11.根据权利要求1至10中任一项所述的聚合物组合物,其中所述聚烯烃是具有范围从0.90至0.97g/cm3的密度的乙烯聚合物。
12.根据权利要求1至10中任一项所述的聚合物组合物,其中所述聚烯烃是乙烯与乙烯基酯的共聚物。
13.一种用于以连续本体制备根据权利要求1至12中任一项所述的可膨胀的组合物的工艺,其包括下述阶段:
i)如果所述聚合物和/或共聚物(a)是颗粒:
1.将所述聚合物和/或共聚物加热至高于连同按重量计范围从1%至50%的量的聚烯烃(b)、以及按重量计范围从0.01%至40%的量的接枝的烯属弹性体(c)的相应的熔点的温度,以便形成熔融态的聚合物组合物;
2.随后在所述熔融态的所述聚合物组合物中并入膨胀剂;
ii)如果所述聚合物和/或共聚物(a)已经是所述熔融态,则加入按重量计范围从1%至50%的量的聚烯烃(b)、按重量计范围从0.01%至40%的量的接枝的烯属弹性体(c),且然后并入膨胀剂以便形成聚合物组合物。
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IT002153A ITMI20122153A1 (it) | 2012-12-17 | 2012-12-17 | Composizione polimerica espandibile a migliorata flessibilita' e relativo procedimento di preparazione |
PCT/IB2013/060871 WO2014097074A1 (en) | 2012-12-17 | 2013-12-12 | Expandable polymeric composition with improved flexibility and relative preparation process |
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EP (1) | EP2931797B1 (zh) |
JP (1) | JP2016500387A (zh) |
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HR (1) | HRP20190482T1 (zh) |
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PL (1) | PL2931797T3 (zh) |
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IT201600079947A1 (it) | 2016-07-29 | 2018-01-29 | Versalis Spa | Composizione polimerica espandibile contentente copolimeri etilen-vinilacetato |
WO2018200151A1 (en) * | 2017-04-25 | 2018-11-01 | Exxonmobil Chemical Patents Inc. | Styrenic copolymers and articles therefrom |
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US20150299446A1 (en) | 2015-10-22 |
BR112015009733A2 (pt) | 2017-07-04 |
WO2014097074A1 (en) | 2014-06-26 |
EP2931797A1 (en) | 2015-10-21 |
RU2015113352A (ru) | 2017-01-23 |
PL2931797T3 (pl) | 2019-07-31 |
RU2647032C2 (ru) | 2018-03-13 |
MX365765B (es) | 2019-06-13 |
ES2718325T3 (es) | 2019-07-01 |
TWI640566B (zh) | 2018-11-11 |
ITMI20122153A1 (it) | 2014-06-18 |
BR112015009733B1 (pt) | 2021-03-16 |
JP2016500387A (ja) | 2016-01-12 |
HRP20190482T1 (hr) | 2019-05-17 |
HUE044400T2 (hu) | 2019-10-28 |
CN104837902B (zh) | 2018-10-26 |
US9963582B2 (en) | 2018-05-08 |
TW201439174A (zh) | 2014-10-16 |
MY171666A (en) | 2019-10-22 |
TR201905462T4 (tr) | 2019-05-21 |
MX2015004398A (es) | 2015-10-09 |
EP2931797B1 (en) | 2019-01-16 |
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