CN106574158A - 粘接方法及输送带 - Google Patents

粘接方法及输送带 Download PDF

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CN106574158A
CN106574158A CN201580044647.7A CN201580044647A CN106574158A CN 106574158 A CN106574158 A CN 106574158A CN 201580044647 A CN201580044647 A CN 201580044647A CN 106574158 A CN106574158 A CN 106574158A
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rubber
bonding
organic peroxide
mentioned
carbon black
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CN106574158B (zh
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邹德庆
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Yokohama Rubber Co Ltd
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Yokohama Rubber Co Ltd
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Abstract

本发明的课题在于提供一种粘接方法和使用该粘接方法制造的输送带,该粘接方法能够使混配有二枯基过氧化物等有机过氧化物而成的耐热性优异的橡胶产品彼此良好地粘接。本发明的粘接方法为下述粘接方法,其在粘接界面使用由含有乙烯‑α‑烯烃共聚物、有机过氧化物(X2)以及炭黑(Y2)的橡胶组合物构成的粘接用橡胶使由含有乙烯‑α‑烯烃共聚物、有机过氧化物(X1)以及炭黑(Y1)的橡胶组合物构成的被粘物橡胶彼此粘接,其中以规定量含有上述被粘物橡胶的上述有机过氧化物(X1)、上述粘接用橡胶的上述有机过氧化物(X2),并且上述有机过氧化物(X1)和上述有机过氧化物(X2)的量比(X2/X1)为1.20~2.00。

Description

粘接方法及输送带
技术领域
本发明涉及一种粘接方法及输送带。
背景技术
以往,如输送带、橡胶履带、橡胶制大型密封垫那样的大型橡胶产品大多使用在作为被粘物的硫化橡胶部件之间的粘接(接合)或硫化橡胶部件与未硫化橡胶部件的粘接时,在粘接界面夹入未硫化的粘接用橡胶(也称为“结合橡胶”)的方法。
例如本申请人在专利文献1中提出了“一种粘接方法,该粘接方法在粘接界面使用由含有二烯类橡胶和有机含硫化合物的橡胶组合物构成的未硫化的粘接用橡胶使由含有二烯类橡胶和有机含硫化合物的橡胶组合物构成的被粘物橡胶彼此粘接,所述被粘物橡胶的总硫量X相对于所述被粘物橡胶中的所述二烯类橡胶100质量份为0.16~0.54质量份,所述粘接用橡胶的总硫量Y相对于所述粘接用橡胶中的所述二烯类橡胶100质量份为0.20~1.00质量份,所述总硫量Y与所述总硫量X的比(Y/X)为1.25~2.50”。
现有技术文献
专利文献
专利文献1:日本专利特开2008-248003号公报
发明内容
发明要解决的问题
但是,已知专利文献1记载的粘接方法的课题在于“提供一种粘接方法,该粘接方法能够使混配有二硫化吗啉等有机含硫化合物而成的耐热性优异的橡胶产品彼此良好地粘接”,因此没有考虑使用有二枯基过氧化物等有机过氧化物的硫化(交联)体系,无法应用于例如使用含有乙烯-α-烯烃共聚物的橡胶组合物形成覆盖橡胶的耐热输送带等的粘接。
因此,本发明的课题在于提供一种粘接方法和使用该粘接方法制造的输送带,该粘接方法能够使混配有二枯基过氧化物等有机过氧化物而成的耐热性优异的橡胶产品彼此良好地粘接。
技术方案
为了解决上述课题,本发明人进行认真研究,结果发现在含有乙烯-α-烯烃共聚物的体系中,通过使粘接用橡胶的有机过氧化物的含量按照规定量少量多于被粘物橡胶的有机过氧化物的含量,由此即使是混配二枯基过氧化物等有机过氧化物而成的耐热性优异的橡胶产品彼此也能够良好地粘接,从而完成了本发明。
即,本发明人发现,通过以下构成能够解决上述课题。
[1]一种粘接方法,该粘接方法在粘接界面使用由含有乙烯-α-烯烃共聚物、有机过氧化物(X2)以及炭黑(Y2)的橡胶组合物构成的粘接用橡胶使由含有乙烯-α-烯烃共聚物、有机过氧化物(X1)以及炭黑(Y1)的橡胶组合物构成的被粘物橡胶彼此粘接,
上述被粘物橡胶的上述有机过氧化物(X1)的含量相对于上述被粘物橡胶中的上述乙烯-α-烯烃共聚物为0.011~0.020摩尔当量,
上述粘接用橡胶的上述有机过氧化物(X2)的含量相对于上述粘接用橡胶中的上述乙烯-α-烯烃共聚物为0.017~0.022摩尔当量,
上述有机过氧化物(X1)和上述有机过氧化物(X2)的量比(X2/X1)为1.20~2.00。
[2]根据[1]所述的粘接方法,其中,上述被粘物橡胶的上述炭黑(Y1)的含量相对于上述被粘物橡胶中的上述乙烯-α-烯烃共聚物100质量份为40~60质量份,
上述粘接用橡胶的上述炭黑(Y2)的含量相对于上述粘接用橡胶中的上述乙烯-α-烯烃共聚物100质量份为30~50质量份,
上述炭黑(Y1)与上述炭黑(Y2)的含量之差(Y1-Y2)为0~10质量份。
[3]根据[1]或[2]所述的粘接方法,其用于输送带彼此的粘接。
[4]一种输送带,其利用[3]所述的粘接方法粘接而成。
有益效果
如以下说明所述,根据本发明能够提供一种粘接方法和使用该粘接方法制造的输送带,该粘接方法能够使混配有二枯基过氧化物等有机过氧化物而成的耐热性优异的橡胶产品彼此良好地粘接。
具体实施方式
下面对本发明的粘接方法及本发明的输送带进行说明。
需要说明的是,本发明书中,使用“~”表示的数值范围是指包含“~”前后记载的数值作为下限值和上限值的范围。
[粘接方法]
本发明的粘接方法为下述粘接方法,其在粘接界面使用由含有乙烯-α-烯烃共聚物、有机过氧化物(X2)以及炭黑(Y2)的橡胶组合物构成的粘接用橡胶使由含有乙烯-α-烯烃共聚物、有机过氧化物(X1)以及炭黑(Y1)的橡胶组合物构成的被粘物橡胶彼此粘接,上述被粘物橡胶的上述有机过氧化物(X1)的含量相对于上述被粘物橡胶中的上述乙烯-α-烯烃共聚物为0.011~0.020摩尔当量,上述粘接用橡胶的上述有机过氧化物(X2)的含量相对于上述粘接用橡胶中的上述乙烯-α-烯烃共聚物为0.017~0.022摩尔当量,且上述有机过氧化物(X1)和上述有机过氧化物(X2)的量比(X2/X1)为1.20~2.00。
此处,量比(X2/X1)是有机过氧化物(X1)相对于被粘物橡胶中的乙烯-α-烯烃共聚物的摩尔当量与有机过氧化物(X2)相对于粘接用橡胶中的乙烯-α-烯烃共聚物的摩尔当量的比例。
在本发明中,通过使被粘物橡胶中的有机过氧化物(X1)和粘接用橡胶中的有机过氧化物(X2)分别为上述含量和量比,能够使橡胶产品彼此良好地粘接。
这其中的原因虽然具体不详,但能够大致推测如下。
即认为是因为,在粘接界面由有机过氧化物生产的自由基的浓度上升,且该浓度与被粘物橡胶本身的自由基浓度产生浓度梯度,由此容易在被粘物橡胶和粘接用橡胶之间进行交联反应。
在本发明中,从保持被粘物橡胶的耐磨损性,且进一步提高粘接性的理由出发,优选上述被粘物橡胶的上述炭黑(Y1)的含量相对于上述被粘物橡胶中的上述乙烯-α-烯烃共聚物100质量份为40~60质量份,上述粘接用橡胶的上述炭黑(Y2)的含量相对于上述粘接用橡胶中的上述乙烯-α-烯烃共聚物100质量份为30~50质量份,且上述炭黑(Y1)与上述炭黑(Y2)的含量之差(Y1-Y2)为0~10质量份。
此处,炭黑(Y1)与炭黑(Y2)的含量之差(Y1-Y2)是炭黑(Y1)相对于被粘物橡胶中的乙烯-α-烯烃共聚物100质量份的质量份与炭黑(Y2)相对于粘接用橡胶中的乙烯-α-烯烃共聚物100质量份的质量份之差。
接着,对于被粘物橡胶、粘接用橡胶以及将它们粘接的具体方式进行说明。
[被粘物橡胶]
在本发明中,被粘物橡胶只要是后述的由含有乙烯-α-烯烃共聚物、有机过氧化物(X1)以及炭黑(Y1)的橡胶组合物构成的被粘物橡胶,则没有特别限定,可以为未硫化的被粘物橡胶(以下也称为“未硫化橡胶部件”),也可以为硫化的被粘物橡胶(以下也称为“硫化橡胶部件”),优选为未硫化橡胶部件。
另外,对于被粘物橡胶而言,除了硫化橡胶部件彼此、未硫化橡胶部件彼此之外,也包括将硫化橡胶部件和未硫化橡胶部件粘接的方式。<乙烯-α-烯烃共聚物>
对于形成被粘物橡胶的橡胶组合物中所含的乙烯-α-烯烃共聚物没有特别限定,作为构成乙烯-α-烯烃共聚物的α-烯烃,可以举出例如乙烯、丙烯、1-丁烯、1-戊烯、1-己烯、1-庚烯、1-辛烯等。
作为这样的乙烯-α-烯烃共聚物,具体可以举出例如乙烯-丙烯共聚物(EPM)、乙烯-1-丁烯共聚物(EBM)、乙烯-1-己烯共聚物、乙烯-1-辛烯共聚物、乙烯-4-甲基-戊基-1共聚物等,这些物质可以单独使用1种,也可以合用2种以上。
<有机过氧化物(X1)>
对于形成被粘物橡胶的橡胶组合物中所含的有机过氧化物(X1)没有特别限定,可以使用以往公知的物质。
作为有机过氧化物(X1),具体可以举出例如二枯基过氧化物、二叔丁基过氧化物、1,3-双叔丁基过氧异丙基苯、正丁基-4,4-双(叔丁过氧基)戊酸酯、2,5-二甲基-2,5-二(叔丁基过氧化)己烷等,这些物质可以单独使用1种,也可以合用2种以上。
作为上述有机过氧化物(X1),可以使用市售产品,作为其具体例,可列举1,3-双叔丁基过氧异丙基苯(商品名“Perkadox 14-40”、化药Akzo公司制造)等。
在本发明中,上述有机过氧化物(X1)的含量优选相对于上述被粘物橡胶中的上述乙烯-α-烯烃共聚物为0.011~0.020摩尔当量,优选为0.013~0.018摩尔当量,更优选为0.014~0.017摩尔当量。
另外,上述有机过氧化物(X1)的含量为上述摩尔当量的范围内,且上述有机过氧化物(X1)与后述的有机过氧化物(X2)的量比(X1/X2)为1.20~2.00的范围内,优选为1.35~1.70的范围内。
<炭黑(Y1)>
对于形成被粘物橡胶的橡胶组合物中所含的炭黑(Y1)没有特别限定,可以使用以往公知的物质。
作为上述炭黑(Y1),具体可以举出例如SAF、ISAF、HAF、FEF、GPE、SRF等的炉黑,这些物质可以单独使用1种,也可以合用2种以上。
上述炭黑(Y1)的含量相对于乙烯-α-烯烃共聚物100重量份优选为40~60质量份,更优选为45~55质量份。
另外,上述炭黑(Y1)的含量在上述质量份的范围内,且上述炭黑(Y1)的含量与后述的炭黑(Y2)的含量之差(Y1-Y2)为0~10质量份的范围内,优选为5~10质量份的范围内。
在本发明中,除了上述成分以外,形成上述被粘物橡胶的橡胶组合物可以根据需要含有炭黑以外的填充剂(例如二氧化硅等)、抗老化剂、抗氧化剂、颜料(染料)、增塑剂、软化剂、阻燃剂、硫化促进剂、蜡、抗静电剂、加工助剂等混配剂。
在本发明中,形成被粘物橡胶的橡胶组合物的制造可以利用班伯里密炼机对上述各成分进行混炼来进行。
另外,作为上述被粘物橡胶的未硫化橡胶部件为形成上述被粘物橡胶的橡胶组合物本身。
另外,作为上述被粘物橡胶的硫化橡胶部件可以通过将形成上述被粘物橡胶的橡胶组合物在例如温度140~150℃左右、0.5小时的条件下进行硫化而获得。
[粘接用橡胶]
在本发明中,粘接用橡胶只要是由含有乙烯-α-烯烃共聚物、有机过氧化物(X2)以及炭黑(Y2)的橡胶组合物构成的粘接用橡胶,则没有特别限定,可以为未硫化的橡胶组合物,也可以为硫化的橡胶组合物,优选为未硫化的橡胶组合物。
作为形成这样的粘接用橡胶的橡胶组合物中所含的乙烯-α-烯烃共聚物、有机过氧化物(X2)和炭黑(Y2)的具体例,分别可以举出作为形成上述被粘物橡胶的橡胶组合物中所含的乙烯-α-烯烃共聚物、有机过氧化物(X1)以及炭黑(Y1)进行示例的物质。
<有机过氧化物(X2)的含量>
在本发明中,上述有机过氧化物(X2)的含量优选相对于上述粘接用橡胶中的上述乙烯-α-烯烃共聚物为0.017~0.022摩尔当量,优选为0.018~0.021摩尔当量,更优选为0.019~0.020摩尔当量。
<炭黑(Y2)的含量>
在本发明中,上述炭黑(Y2)的含量相对于乙烯-α-烯烃共聚物100重量份为30~50质量份,更优选为35~45质量份。
在本发明中,与形成上述被粘物橡胶的橡胶组合物同样,除了上述成分以外,形成上述粘接用橡胶的橡胶组合物可以根据需要含有炭黑以外的填充剂(例如二氧化硅等)、抗老化剂、抗氧化剂、颜料(染料)、增塑剂、软化剂、阻燃剂、硫化促进剂、蜡、抗静电剂、加工助剂等混配剂。
在本发明中,形成粘接用橡胶的橡胶组合物的制造可以与形成上述被粘物橡胶的橡胶组合物同样地利用班伯里密炼机对上述各成分进行混炼来进行。
[粘接方式]
本发明的粘接方法为在粘接界面使用上述的粘接用橡胶使上述被粘物彼此粘接的粘接方法。
此处,“在粘接界面使用”可以举出在被粘物橡胶与被粘物橡胶的粘接界面夹入粘接用橡胶的方式、在被粘物橡胶彼此的粘接界面上涂布溶解有粘接用橡胶的溶液的方式等。
另外,对于粘接的方法没有特别限定,优选示例在被粘物橡胶与被粘物橡胶的粘接界面夹入粘接用橡胶的状态下对它们进行热压的方法。需要说明的是,热压的条件因乙烯-α-烯烃共聚物的种类、有机过氧化物的种类而不同,因此没有特别限定,例如使用乙烯-丙烯共聚物(EPM)作为乙烯-α-烯烃共聚物,使用1,3-双叔丁基过氧异丙基苯作为有机过氧化物的情况下,优选在140~160℃的加热条件下,为30分钟~2小时、1MPa左右加压的条件。
本发明的粘接方法能够容易地对橡胶产品彼此(特别是长条形状的制品)进行无间断加工,因此即使耐热性优异的橡胶产品中也优选用于输送带彼此的接合。
本发明的输送带是使用上述本发明粘接方法粘接而成的输送带。具体而言,该输送带通过将输送带的一端和输送带的另一端重叠,在该重叠的界面上夹入粘接用橡胶,并进行热压而获得。
实施例
以下,列举实施例,对本发明的粘接方法进行更具体的说明,但本发明并不仅限于这些实施例。
<橡胶组合物1~8的制备>
相对于由乙烯-丙烯共聚物(EPM)和根据期望混配的乙烯-1-丁烯共聚物(EBM)构成的橡胶成分100质量份,以下述第1表中所示的组成成分(质量份)[有机过氧化物为摩尔当量]制备各橡胶组合物。
具体而言,首先,使用班伯里密炼机(3.4立升)将下述第1表所示的成分中除交联剂和有机过氧化物以外的成分混炼5分钟,在达到160℃时排出,获得母料。接下来,用开炼辊在所得到的母料中混炼交联剂和有机过氧化物,获得橡胶组合物。
[表1]
第1表中,各成分的详细情况如下。
·EPM:乙烯-丙烯共聚物[KEP-110、KUMHO POLYCHEM公司制]
·EBM:乙烯-1-丁烯共聚物[Engage 7487、DOW CHEMICAL公司制]
·炭黑:Niteron#300[新日化CARBON公司制]
·氧化锌:III型氧化锌[正同化学公司制]
·硬脂酸:硬脂酸50S[千叶脂肪酸公司制]
·抗老化剂:Nocrac MMB[大内新兴化学工业公司制]
·交联剂:甲基丙烯酸镁[Hi-Cross GT、精工化学公司制]
·增塑剂:Lucant HC-3000X[三井化学公司制]
·有机过氧化物:1,3-双叔丁基过氧异丙基苯[Perkadox 14-40、化药Akzo公司制]
<实施例1~5、比较例1~5>
使用第1表所示的组合物1~8,进行被粘物橡胶与未硫化的粘接用橡胶的粘接。
具体而言,将下述第2表所示的由橡胶组合物构成的被粘物橡胶(厚度5mm)和下述第2表所示的由橡胶组合物构成的粘接用橡胶(厚度5mm)贴合后,在150℃下进行60分钟的热压来进行。需要说明的是,样品形状依据JIS K6256-1:2006的“与布的剥离强度”进行制作。
此处,被粘物橡胶、粘接用橡胶中的有机过氧化物、炭黑的含量以及它们的比例等也如下述第2表所示。
粘接后,利用以下所示的方法对剥离力进行测定,对粘接性进行评价。其结果如下述第2表所示。
<剥离力>
在室温(23℃)和150℃的条件下,依据JIS K6256-1:2006的“与布的剥离强度”进行剥离试验,对剥离力(N/mm)进行测定。
[表2]
由第2表所示的结果可知,即使被粘物橡胶的有机过氧化物(X1)的含量为0.011~0.020摩尔当量,且粘接用橡胶的有机过氧化物(X2)的含量为0.017~0.022摩尔当量,若有机过氧化物(X1)与有机过氧化物(X2)的量比(X2/X1)小于1.20,则室温或150℃的剥离力小,橡胶产品彼此的粘接性差(比较例1~5)。
与此相对,可知如果被粘物橡胶的有机过氧化物(X1)的含量为0.011~0.020摩尔当量,粘接用橡胶的有机过氧化物(X2)的含量为0.017~0.022摩尔当量,且有机过氧化物(X1)与有机过氧化物(X2)的量比(X2/X1)为1.20~2.00,则室温或150℃的剥离力高,橡胶产品彼此的粘接性良好(实施例1~5)。

Claims (4)

1.一种粘接方法,所述粘接方法在粘接界面使用由含有乙烯-α-烯烃共聚物、有机过氧化物X2以及炭黑Y2的橡胶组合物构成的粘接用橡胶使由含有乙烯-α-烯烃共聚物、有机过氧化物X1以及炭黑Y1的橡胶组合物构成的被粘物橡胶彼此粘接,
所述被粘物橡胶的所述有机过氧化物X1的含量相对于所述被粘物橡胶中的所述乙烯-α-烯烃共聚物为0.011~0.020摩尔当量,
所述粘接用橡胶的所述有机过氧化物X2的含量相对于所述粘接用橡胶中的所述乙烯-α-烯烃共聚物为0.017~0.022摩尔当量,
所述有机过氧化物X1和所述有机过氧化物X2的量比X2/X1为1.20~2.00。
2.根据权利要求1所述的粘接方法,其中,所述被粘物橡胶的所述炭黑Y1的含量相对于所述被粘物橡胶中的所述乙烯-α-烯烃共聚物100质量份为40~60质量份,
所述粘接用橡胶的所述炭黑Y2的含量相对于所述粘接用橡胶中的所述乙烯-α-烯烃共聚物100质量份为30~50质量份,
所述炭黑Y1与所述炭黑Y2的含量之差Y1-Y2为0~10质量份。
3.根据权利要求1或2所述的粘接方法,其用于输送带彼此的粘接。
4.一种输送带,其利用权利要求3所述的粘接方法粘接而成。
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CN101559875A (zh) * 2009-05-12 2009-10-21 山东安能输送带橡胶有限公司 一种高耐热耐磨输送带
CN102337092A (zh) * 2011-07-22 2012-02-01 北京化工大学 一种耐高温帆布输送带用粘合层橡胶材料及其使用方法
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