CN114250045A - 一种具有超强耐碱浸泡性能的粘接树脂及其制备方法 - Google Patents
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Abstract
本发明公开了一种具有超强耐碱浸泡性能的粘接树脂及其制备方法,该粘接树脂包括如下重量份的原料:聚烯烃及其共聚物52‑65份、改性低密度聚乙烯12‑16份、乙烯基弹性体8‑22份、增粘剂1‑4份、稳定剂2‑6份、抗氧化剂1‑3份、助剂1‑2份。本发明采用了聚烯烃及其共聚物、改性低密度聚乙烯、乙烯基弹性体、增粘剂、稳定剂、抗氧化剂、助剂进行复配,该种粘接树脂在与被粘物复合后,具有较长时间耐20%氢氧化钠溶液的能力,在粘接界面暴露的前提下,浸泡24小时过后,粘接强度仍可达到浸泡前的80%以上。这一特性使得热熔胶以及粘接后的产品使用寿命被大大延长,具有极大的应用潜力。
Description
技术领域
本发明涉及粘接树脂技术领域,尤其涉及一种具有超强耐碱浸泡性能的粘接树脂及其制备方法。
背景技术
热熔胶是一种可塑性的粘合剂,在一定温度范围内其物理状态随温度改变而改变,而化学特性不变,其无毒无味,属环保型化学产品。因其产品本身系固体,便于包装、运输、存储、无溶剂、无污染、无毒型;以及生产工艺简单,高附加值,黏合强度大、速度快等优点而备受青睐。
由于热熔胶的环保和施工简单的特性,其已经被广泛应用于各个领域。其中复合管道便是热熔胶的重要应用领域之一,作为传统金属管道的升级型产品。复合管道既有金属的机械性能,又有塑料管的耐腐蚀,缓结垢,不易生长微生物的特点,是输送以流体为介质的理想管道。但在使用过程中,复合管道中的金属与塑料之间的粘接界面往往会形成薄弱点,被输送的流体腐蚀,直至管道失效,一般输送的流体包括自来水,酸,碱,盐,有机溶剂等。在北方的盐碱地,当地水质呈偏碱性,这就要求当地排水管道具备耐碱水浸泡的特性,但碱溶液本身就对金属有一定的腐蚀性,从而引起金属与热熔胶之间的连锁脱胶反应,如何开发一种对金属起到有效保护作用,同时粘接力强,耐碱溶液浸泡的热熔胶产品显得格外重要。
发明内容
本发明的目的是针对现有技术中的不足,提供一种具有超强耐碱浸泡性能的粘接树脂及其制备方法。
为实现上述目的,本发明采取的技术方案是:
第一方面是提供一种具有超强耐碱浸泡性能的粘接树脂,包括如下重量份的原料:
进一步地,所述聚烯烃及其共聚物为线性低密度聚乙烯、乙烯-乙酸乙烯酯共聚树脂、乙烯-丙烯酸乙酯共聚树脂中的一种或几种。
进一步地,所述改性低密度聚乙烯为马来酸酐改性低密度聚乙烯,其密度为0.920-0.930g/cm3,熔融指数为0.8~2.3g/10min,其中马来酸酐的接枝率在0.50-1%。
进一步地,所述乙烯基弹性体为乙烯-丁烯或乙烯-己烯或乙烯-辛烯的共聚物。
进一步地,所述增粘剂为松香及其衍生物、萜烯树脂及其改性树脂、石油树脂、热塑性酚醛树脂、低分子量聚苯乙烯中的一种或几种。
进一步地,所述稳定剂为尺寸稳定剂和光稳定剂的混合物。
进一步地,所述抗氧剂为抗氧剂B215、抗氧剂1010、抗氧剂168、抗氧剂1076、抗氧剂3114中的一种或几种。
进一步地,所述助剂为无规聚丙烯。
第二方面是提供一种粘接树脂的制备方法,包括以下步骤:
步骤一,按照配比称量聚烯烃及其共聚物、改性低密度聚乙烯、乙烯基弹性体、增粘剂、稳定剂、抗氧化剂、助剂,混合均匀,混合温度为40-60℃;
步骤二,将混合均匀后的原料加入到挤出机中挤出造粒,挤出机的挤出温度为180-200℃,挤出机螺杆的转速为300-350rpm。
本发明采用以上技术方案,与现有技术相比,具有如下技术效果:
本发明采用了聚烯烃及其共聚物、改性低密度聚乙烯、乙烯基弹性体、增粘剂、稳定剂、抗氧化剂、助剂进行复配,该种粘接树脂在与被粘物复合后,具有较长时间耐20%氢氧化钠溶液的能力,在粘接界面暴露的前提下,浸泡24小时过后,粘接强度仍可达到浸泡前的80%以上。这一特性使得热熔胶以及粘接后的产品使用寿命被大大延长,具有极大的应用潜力。
具体实施方式
下面结合具体实施例对本发明作进一步说明,但不作为本发明的限定。需要说明的是,在不冲突的情况下,本发明中的实施例及实施例中的特征可以相互组合。
本发明公开了一种具有超强耐碱浸泡性能的粘接树脂,包括如下重量份的原料:
作为优选例,聚烯烃及其共聚物为线性低密度聚乙烯、乙烯-乙酸乙烯酯共聚树脂、乙烯-丙烯酸乙酯共聚树脂中的一种或几种。
作为优选例,改性低密度聚乙烯为马来酸酐改性低密度聚乙烯,其密度为0.920-0.930g/cm3,熔融指数为0.8~2.3g/10min,其中马来酸酐的接枝率在0.50-1%。
作为优选例,乙烯基弹性体为乙烯-丁烯或乙烯-己烯或乙烯-辛烯的共聚物。
作为优选例,增粘剂为松香及其衍生物、萜烯树脂及其改性树脂、石油树脂、热塑性酚醛树脂、低分子量聚苯乙烯中的一种或几种。
作为优选例,稳定剂为尺寸稳定剂和光稳定剂的混合物。
作为优选例,抗氧剂为抗氧剂B215、抗氧剂1010、抗氧剂168、抗氧剂1076、抗氧剂3114中的一种或几种。
作为优选例,助剂为无规聚丙烯。
本发明还公开了上述粘接树脂的制备方法,包括以下步骤:
步骤一,按照配比称量聚烯烃及其共聚物、改性低密度聚乙烯、乙烯基弹性体、增粘剂、稳定剂、抗氧化剂、助剂,混合均匀,混合温度为40-60℃;
步骤二,将混合均匀后的原料加入到挤出机中挤出造粒,挤出机的挤出温度为180-200℃,挤出机螺杆的转速为300-350rpm。
实施例1
本实施例提供一种具有超强耐碱浸泡性能的粘接树脂,包括如下重量份的原料:
实施例2
本实施例提供一种具有超强耐碱浸泡性能的粘接树脂,包括如下重量份的原料:
实施例3
本实施例提供一种具有超强耐碱浸泡性能的粘接树脂,包括如下重量份的原料:
实施例4
本实施例提供一种具有超强耐碱浸泡性能的粘接树脂,包括如下重量份的原料:
对上述实施例1-4制备的热熔胶样品以及从市场采购的热熔胶产品,按照标准的钢带增强聚乙烯螺旋波纹管(CJ/T 225-2011)进行管道生产,生产后的管道不封口,截取10cm长的管道样品,浸泡在20%氢氧化钠水溶液中24小时进行开胶情况统计,并且按照标准中的剥离强度测试方法进行剥离强度测试。实验结果见表1。
表1
由此可知,相比于市场采购的热熔胶产品,本发明实施例1-4的粘接树脂在管材浸泡过后,开胶深度均较小,而相同浸泡条件下,市场采购的热熔胶产品生产的管材完全脱胶,除此以外,浸泡过后本发明实施例1-4所生产的热熔胶产品管道剥离强度均保持的较好。
上所述仅为本发明较佳的实施例,并非因此限制本发明的实施方式及保护范围,对于本领域技术人员而言,应当能够意识到凡运用本发明说明书内容所作出的等同替换和显而易见的变化所得到的方案,均应当包含在本发明的保护范围内。
Claims (9)
2.根据权利要求1所述的粘接树脂,其特征在于,所述聚烯烃及其共聚物为线性低密度聚乙烯、乙烯-乙酸乙烯酯共聚树脂、乙烯-丙烯酸乙酯共聚树脂中的一种或几种。
3.根据权利要求1所述的粘接树脂,其特征在于,所述改性低密度聚乙烯为马来酸酐改性低密度聚乙烯,其密度为0.920-0.930g/cm3,熔融指数为0.8~2.3g/10min,其中马来酸酐的接枝率在0.50-1%。
4.根据权利要求1所述的粘接树脂,其特征在于,所述乙烯基弹性体为乙烯-丁烯或乙烯-己烯或乙烯-辛烯的共聚物。
5.根据权利要求1所述的粘接树脂,其特征在于,所述增粘剂为松香及其衍生物、萜烯树脂及其改性树脂、石油树脂、热塑性酚醛树脂、低分子量聚苯乙烯中的一种或几种。
6.根据权利要求1所述的粘接树脂,其特征在于,所述稳定剂为尺寸稳定剂和光稳定剂的混合物。
7.根据权利要求1所述的粘接树脂,其特征在于,所述抗氧剂为抗氧剂B215、抗氧剂1010、抗氧剂168、抗氧剂1076、抗氧剂3114中的一种或几种。
8.根据权利要求1所述的粘接树脂,其特征在于,所述助剂为无规聚丙烯。
9.一种如权利要求1-8任一项所述的粘接树脂的制备方法,其特征在于,包括以下步骤:
步骤一,按照配比称量聚烯烃及其共聚物、改性低密度聚乙烯、乙烯基弹性体、增粘剂、稳定剂、抗氧化剂、助剂,混合均匀,混合温度为40-60℃;
步骤二,将混合均匀后的原料加入到挤出机中挤出造粒,挤出机的挤出温度为180-200℃,挤出机螺杆的转速为300-350rpm。
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