CN102702607B - 一种复合沥青改性剂及其制备方法 - Google Patents
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Abstract
一种复合沥青改性剂,是由原料海泡石纤维、三聚氰胺、聚烯烃、偶联剂以及增容剂制得的。原料配方如下:海泡石纤维5~20份,废旧塑料30~50份,三聚氰胺5~15份,SBS5~15份,偶联剂1~10份,增容剂5~10份。所得的改性材料较好的改善了沥青的粘接性和抗低温龟裂性。且本发明可以充分利用废旧塑料资源,变废为宝;提供一种废旧资源的有效利用途径。
Description
技术领域
本发明属建筑材料技术领域,具体涉及废旧塑料、海泡石纤维复合沥青改性剂及其制备方法。
背景技术
目前中国的公路事业进入了以建设高速公路、一级公路等高等级公路为主的新时代,高速公路的蓬勃发展对高速公路的路面质量提出了更高的要求。目前高速公路普遍存在耐候性差的问题,主要体现在对沥青的高要求。传统的沥青直接使用时存在含蜡量高,温度敏感性大,热稳定性和低温抗裂性能差等缺点,易开裂、耐老化性差。为了提高沥青路面质量,常要根据需要对沥青进行改性,目前多采用向沥青中添加各种添加改性剂的方法对沥青进行改性,提高沥青的热稳定性、粘结力、抗裂缝能力以及耐久性等,以期满足高等级公路对沥青的使用要求。
中国专利200610017564.1公开了一种改善沥青性能的沥青填料组合物,它是在沥青中加入海泡石、硅灰石、滑石和重晶石的组合物,主要提高沥青的粘接性和抗低温龟裂性。中国专利201010155339.0公开了一种由沥青、海泡石纤维、水镁石纤维组成的沥青组合纤维填料,具有提高沥青的粘接性、抗低温龟裂性和减少路面车辙位移病害等优点。采用矿物颗粒或矿物纤维填充沥青,一定程度上改善了沥青的粘接性和抗低温龟裂性,但在沥青的加工、运输和储存过程中容易发生离析和沉淀,导致改性不均匀甚至破坏沥青的物理性能。
垃圾中废旧塑料的回收利用作为一项节约能源、保护环境的措施,正日益受到重视,尤其是发达国家工作起步早,已经收到了明显的效益。对垃圾进行筛选,回收有用的塑料,既可以有效降低垃圾总量,大幅降低垃圾中难降解的成分,又为塑料厂解决了废旧塑料供求不足的问题,为厂家节省了成本。废旧塑料通过改性再生可广泛地应用于木塑材料、建筑材料、涂料和胶粘剂等。专利CN101225237B公开了一种用废旧塑料改性沥青的方法,可以提高沥青的软化点和路面高温稳定性。国内外对废旧塑料改性沥青有较深入的研究,但是大多数的废旧塑料在沥青中共混时难以形成稳定的体系,不可长期储存,稳定性不好,在解决沥青耐老化性的问题上仍存在较大的困难。
发明内容
本发明的目的在于提供一种废旧塑料应用于沥青改性材料的技术方案,通过本发明的原料的有效配比,所得的改性材料较好的改善了沥青的粘接性和抗低温龟裂性。且本发明可以充分利用废旧塑料资源,变废为宝;提供一种废旧资源的有效利用途径。
本发明提出的一种废旧塑料/海泡石纤维复合沥青改性剂,是由原料海泡石纤维、三聚氰胺、聚烯烃、偶联剂以及增容剂制得的。
原料配方如下:
所述海泡石纤维的粒度为0.2-5mm,孔隙率为32-48%的海泡石纤维。
所述废旧塑料为聚烯烃废旧塑料;包括PE、PP、PVC等。
所述SBS嵌段比PS/PB(质量)30/70,灰份≤0.2﹪,拉伸强度≥15MPa,扯断伸长率≥700﹪,邵氏硬度≥68A。可以选自湖南岳阳石化总厂生产,牌号YH791,线型结构,嵌段比PS/PB(质量)30/70,平均分子量Mn(10.8╳104);或者是燕山石化公司生产,牌号YH4303,星型结构,嵌段比PS/PB(质量)30/70,平均分子量Mn(18.3╳104)。
所述的偶联剂为乙烯基三乙氧基硅烷,还可以是乙烯基三(2-甲氧基乙氧基)硅烷。
所述增容剂为PP-gMAH(马来酸酐接枝聚丙烯)、POE-gMAH(马来酸酐接枝乙烯-辛烯共聚物)、PE-g-MAH(马来酸酐接枝聚乙烯)中的一种或几种,其中优选的成分为PP-g-MAH。
所述的废旧塑料/海泡石纤维复合沥青改性剂的制备方法,包括如下步骤:
(1)将干燥好的海泡石纤维、废旧塑料、三聚氰胺、SBS、偶联剂和增容剂在高速混合机中充分混合后,
(2)将步骤(1)得到的混合物加入双螺杆挤出机中挤出成型,挤出机的温度设定为如下:
一区温度:160~175℃二区温度:170~180℃三区温度:180~190℃
四区温度:185~195℃五区温度:180~190℃六区温度:165~180℃
机头温度为165~180℃,挤出时的主轴转速为10~20r/min
(3)步骤(2)得到的挤出物料经冷却、风干、造粒、干燥,最后装桶得到成品。
本发明的优势在于由于本发明采用的海泡石纤维作为产品的成分之一,在沥青中起到了很好的增韧作用,应用在高等级沥青路面中很好的改善了路面的耐磨性以及抗低温龟裂性能。且本发明又是以添加废旧塑料和海泡石纤维为主要成分的复合材料制备复合沥青改性剂,并同时添加偶联剂和增容剂,通过以上各成分及含量的有效配比来提高复合物与沥青的相容稳定性,极大的提高了改性剂与沥青的相容性,性能非常稳定,添加在沥青中可长时间稳定存在。本发明的产品在沥青中具有很好的分散性,添加简单,只需要简单的搅拌设备,对设备要求不高,也无需加热,就可以实现产品在沥青中的良好分散,对沥青的粘接性、可塑性以及耐高温性等均有很好的改善。从而提高沥青混凝土路面的各项性能,并同时提供该复合沥青改性剂的制备方法。本发明较好的解决了目前使用改性沥青中存在的稳定性、抗低温龟裂性以及耐老化问题,并可以充分利用废旧塑料这一废弃资源,变废为宝,符合我国持续发展要求,从而达到治理污染和废弃资源循环利用的良好目的。
具体实施方法
以下实施例旨在说明本发明而不是对本发明的进一步限定。
实施例1.
本例中复合沥青改性剂的原料配比为:
具体制备方法包括如下步骤:
(1)将干燥好的海泡石纤维、废旧塑料、三聚氰胺、SBS、乙烯基三乙氧基硅烷和PP-gMAH在高速混合机中充分混合后,
(2)将步骤(1)得到的混合物加入双螺杆挤出机中挤出成型,挤出机的温度设定为如下:
一区温度:160℃二区温度:175℃三区温度:185℃
四区温度:185℃五区温度:180℃六区温度:180℃
机头温度为180℃,挤出时的主轴转速为20r/min
(3)步骤(2)得到的挤出物料经冷却、风干、造粒、干燥,最后装桶得到成品。
实施例2.
本例聚合物/海泡石纤维复合沥青改性剂的原料配比为:
具体制备方法包括如下步骤:
(1)将干燥好的海泡石纤维、废旧塑料、三聚氰胺、SBS、乙烯基三乙氧基硅烷和PP-g-MAH在高速混合机中充分混合后,
(2)将步骤(1)得到的混合物加入双螺杆挤出机中挤出成型,挤出机的温度设定为如下:
一区温度:175℃二区温度:180℃三区温度:185℃
四区温度:185℃五区温度:190℃六区温度:180℃
机头温度为165℃,挤出时的主轴转速为15r/min
(3)步骤(2)得到的挤出物料经冷却、风干、造粒、干燥,最后装桶得到成品。
实施例3.
本例聚合物/海泡石纤维复合沥青改性剂的原料配比为:
具体制备方法包括如下步骤:
(1)将干燥好的海泡石纤维、废旧塑料、三聚氰胺、SBS、乙烯基三乙氧基硅烷和PP-gMAH在高速混合机中充分混合后,
(2)将步骤(1)得到的混合物加入双螺杆挤出机中挤出成型,挤出机的温度设定为如下:
一区温度:175℃二区温度:180℃三区温度:185℃
四区温度:185℃五区温度:185℃六区温度:170℃
机头温度为165℃,挤出时的主轴转速为20r/min
(3)步骤(2)得到的挤出物料经冷却、风干、造粒、干燥,最后装桶得到成品。
实施例4.
本例聚合物/海泡石纤维复合沥青改性剂的原料配比为:
具体制备方法包括如下步骤:
(1)将干燥好的海泡石纤维、废旧塑料、三聚氰胺、SBS、乙烯基三乙氧基硅烷和PP-g-MAH在高速混合机中充分混合后,
(2)将步骤(1)得到的混合物加入双螺杆挤出机中挤出成型,挤出机的温度设定为如下:
一区温度:175℃二区温度:180℃三区温度:185℃
四区温度:185℃五区温度:185℃六区温度:170℃
机头温度为165℃,挤出时的主轴转速为20r/min
(3)步骤(2)得到的挤出物料经冷却、风干、造粒、干燥,最后装桶得到成品。
实施例5.
将实施案例1、2、3、4所制备的改性剂加入到热沥青(AH-90号重交通量道路石油沥青)中,其中改性剂与热沥青的质量比为1:,9,利用高速剪切设备在185~190℃下高速剪切30分钟,获得改性沥青,对所制成的改性沥青进行测试,测试数据如下。
Claims (7)
2.根据权利要求1所述的复合沥青改性剂,其特征在于所述海泡石纤维的粒度为0.2-5mm,孔隙率为32-48%。
3.根据权利要求1所述的复合沥青改性剂,其特征在于所述废旧塑料为聚烯烃废旧塑料。
4.根据权利要求1所述的复合沥青改性剂,其特征在于所述SBS为星型结构,嵌段比PS/PB的质量比为30/70,平均分子量Mn为18.3╳104;或者是线型结构,嵌段比PS/PB的质量比为30/70,平均分子量Mn为10.8╳104。
5.根据权利要求1所述的复合沥青改性剂,其特征在于所述偶联剂为乙烯基三乙氧基硅烷或乙烯基三(2-甲氧基乙氧基)硅烷。
6.根据权利要求1所述的复合沥青改性剂,其特征在于所述增容剂为PP-g-MAH、POE-g-MAH、PE-g-MAH中的一种或几种。
7.制备权利要求1-6任一项所述的复合沥青改性剂的制备方法,其特征在于,包括如下步骤:将干燥好的海泡石纤维、废旧塑料、三聚氰胺、SBS、偶联剂和增容剂在高速混合机中充分混合后,加入双螺杆挤出机中挤出成型,挤出机的温度设定为如下:
一区温度:160~175℃二区温度:170~180℃三区温度:180~190℃
四区温度:185~195℃五区温度:180~190℃六区温度:165~180℃
机头温度为165~180℃,挤出时的主轴转速为10~20r/min,挤出物料经冷却、风干、造粒、干燥后,装桶,得到成品。
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