CN111849142A - 半导电pc黑色母粒及其制备方法 - Google Patents
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Abstract
本发明属于高分子材料技术领域,尤其涉及一种半导电PC黑色母粒及其制备方法。本发明半导电PC黑色母粒其制作原料按重量百分比计包括:PC:30‑60%;冲击改性剂:5‑10%;导电炭黑:15‑30%;着色剂:5‑15%;分散剂:1‑10%;加工助剂:0.5‑5%。通过复配分散剂和添加加工助剂与色母载体、冲击改性剂、导电炭黑、着色剂协同作用,利用特定的加工方法,最终制得黑度高、韧性好、具有静电消除功能和永久半导电性能且能最大限度保持PC材料物理性能的PC色母粒。
Description
技术领域
本发明涉及半导电高分子材料技术领域,尤其涉及一种半导电PC黑色母粒及其制备方法。
背景技术
目前市场上的PC黑色母以通用型的PE载体黑色母和PC载体黑色母为主,前一种因与PC材料相容性差,其冲击强度急速下降,导致产品变脆。后一种与PC材料相容性好,能较大限度的保持PC材料的物理性能,中国发明专利(CN104761858B)公开了一种具有增韧效果的实色PC色母粒,该色母粒虽具有较好的抗冲击性能,但其生产出来的产品静电吸附效果较差,并且不具有永久半导电功能。为了扩展色母粒的应用范围,满足客户多种需求,亟需开发一款抗冲击性能佳,兼具静电消除效果、韧性、半导电性能优越的以PC为载体的色母粒产品。
发明内容
本发明的目的是针对现有技术中存在的上述问题,提供一种黑度高、韧性好、具有静电消除功能和永久半导电性能且能最大限度保持PC材料物理性能的PC色母粒及其制备方法。
本发明的上述目的可以通过下列技术方案来实现:一种半导电PC黑色母粒,其制作原料按重量百分比计包括:
本发明以PC作为色母载体,添加冲击改性剂提高材料的抗冲击性能,通过分散剂和加工助剂将导电炭黑与着色剂充且稳定的分散在色母载体中,不仅使得色母粒产品具有较好的抗静电效果和永久半导电性能,还兼具高黑亮效果。
作为优选,所述冲击改性剂为丙烯酸类橡胶共聚物、核壳型丙烯酸酯中的至少一种。
作为优选,所述着色剂由溶剂红、溶剂黄、溶剂蓝按照质量比(1-3):1:(0.5-1)复合而成。通过该质量比复配的着色剂协同导电炭黑应用到色母粒中使得色母粒产品呈现出高黑亮效果。
作为优选,所述分散剂为乙烯-乙酸乙烯共聚物EVA蜡、乙撑双硬脂酰胺、聚乙烯蜡、硬脂酸酯类,有机硅油中的至少一种。
进一步优选,所述分散剂由乙烯-乙酸乙烯共聚物EVA蜡和聚乙烯蜡按照质量比1:(4.5-6)复合而成。
本发明PC树脂熔体粘度高,与导电炭黑表面的相容性差,所以润湿较差,很难渗透进团聚体的空隙之中,因此不能有效传递剪切力,难以较好地破碎团聚体。即便在团聚体破碎后,树脂熔体也不能迅速润湿和保护新生粒子,相互的碰撞接触又会使粒子重新聚集。聚乙烯蜡具有较低的熔点,生产加工时先与树脂熔融,包覆在炭黑表面,由于聚乙烯蜡粘度低且与炭黑相容性较好,所以较易润湿,并能渗透进内部孔隙中,削弱了炭黑团聚体的内聚力,使之在外加剪切力的作用下更易被打开,新生粒子也能够得到迅速的润湿与保护,使炭黑分散性明显改善。但同时由于聚乙烯蜡粘度较低,导致体系粘度降低,使传递到炭黑团聚体的剪切力大为下降,不利于炭黑分散,而乙烯-乙酸乙烯共聚物EVA蜡具有相对较高的粘度且属于极性分散剂,在加工过程中先于载体包覆在着色剂表面,更好地润湿颜料,使得载体和着色剂的亲和力、混容性大大提高,有利于着色剂的分散,使得着色剂的着色力有较大提高。因此,本发明将乙烯-乙酸乙烯共聚物EVA蜡和聚乙烯蜡按照质量比1:(4.5-6)复合作为分散剂,二者相互作用,不仅能够提高导电炭黑的分散性,还有利于着色剂的分散,不仅提高了加工过程生产效率,还提高了色母粒抗冲击、抗拉、防静电性能及表面质量。
作为优选,所述加工助剂包括润滑剂和抗氧化剂。
作为优选,所述润滑剂为硬脂酸钙和硬脂酸钡按照质量比(1-2):1复合而成。本发明复配润滑剂可以防止熔融聚合物粘附于热加工设备表面,具有降低摩擦、提高产品外观光泽度和改善脱模性能的作用,同时协同分散剂促进导电炭黑及着色剂在熔体中均匀分散。
作为优选,所述抗氧化剂为抗氧化剂1076、抗氧化剂168、二亚磷酸季戊四醇二硬脂醇酯抗氧化剂中的至少一种。本发明采用的抗氧化剂分子量高、耐热性好,特别适合于高温加工色母粒塑料产品,在加工过程中能有效防止色母粒塑料的降解及黄变,而且能很好地阻止塑料的水解。
本发明的第二个目的是提供一种半导电PC黑色母粒的制备方法,包括如下步骤:
S1:按上述重量份数称取各原料组分,备用;
S2:将各原料组份投入到速度为900-1500r/min混料机进行混合,于混料机温度在120-160℃时将物料放出;
S3:将混合好的物料转入双螺杆挤出机进行挤出、水冷造粒。
S4:将造粒所得的色母料进行混合,于80-120℃温度下烘干,即得色母粒成品。
与现有技术相比,本发明具有如下优点:
1.本发明使用乙烯-乙酸乙烯共聚物EVA蜡和聚乙烯蜡复合分散剂,不仅能够提高导电炭黑的分散性,还有利于着色剂的分散,提高加工过程生产效率的同时还提高了色母粒抗冲击、抗拉、防静电及表面质量等方面的品质。
2.本发明原料组分配伍合理,生产工序简单、生产出的产品具有半导电、分散性好、光泽度高、高黑亮且表面不易沾染灰尘,可以广泛应用于各种聚碳酸酯产品中,具有很高的经济效益。
具体实施方式
以下是本发明的具体实施例,并说明对本发明的技术方案作进一步的描述,但本发明并不限于这些实施例。如果无特殊说明,本发明的实施例中所采用的原料均为本领域常用的原料,实施例中所采用的方法,均为本领域的常规方法。
实施例1
按质量百分比称取如下各原料组分PC50%、丙烯酸类橡胶共聚物8%、导电炭黑20%、溶剂红4%、溶剂黄3%、溶剂蓝2%、乙烯-乙酸乙烯共聚物EVA蜡1.5%、聚乙烯蜡8.5%、硬脂酸钙1%、硬脂酸钡1%、抗氧化剂1076 0.5%、抗氧化剂168 1.0%、二亚磷酸季戊四醇二硬脂醇酯0.5%,备用;
将各原料组份投入到速度为1200r/min高速混料机进行混合,于混料机温度在140℃时将物料放出;
将混合好的物料转入双螺杆挤出机进行挤出、水冷造粒;
将造粒所得的色母料进行混合,于100℃温度下烘干,即得色母粒成品。
实施例2
按质量百分比称取如下各原料组分PC30%、核壳型丙烯酸酯10%、导电炭黑30%、溶剂红7%、溶剂黄5%、溶剂蓝3%、乙烯-乙酸乙烯共聚物EVA蜡5%、乙撑双硬脂酰胺5%、硬脂酸钙1%、硬脂酸钡0.5%、二亚磷酸季戊四醇二硬脂醇酯3.5%,备用;
将各原料组份投入到速度为900r/min高速混料机进行混合,于混料机温度在120℃时将物料放出;
将混合好的物料转入双螺杆挤出机进行挤出、水冷造粒;
将造粒所得的色母料进行混合,于80℃温度下烘干,即得色母粒成品。
实施例3
按质量百分比称取如下各原料组分PC60%、丙烯酸类橡胶共聚物2%、核壳型丙烯酸酯3%、导电炭黑15%、溶剂红5.5%、溶剂黄3%、溶剂蓝1.5%、聚乙烯蜡5%、有机硅油4.5%、硬脂酸钙0.15、硬脂酸钡0.15%、抗氧化剂1076 0.2%,备用;
将各原料组份投入到速度为1500r/min高速混料机进行混合,于混料机温度在160℃时将物料放出;
将混合好的物料转入双螺杆挤出机进行挤出、水冷造粒;
将造粒所得的色母料进行混合,于120℃温度下烘干,即得色母粒成品。
实施例4
按质量百分比称取如下各原料组分PC45%、核壳型丙烯酸酯6%、导电炭黑25%、溶剂红4%、溶剂黄4%、溶剂蓝4%、乙撑双硬脂酰胺9%、硬脂酸钙1%、硬脂酸钡1%、抗氧化剂168 1%,备用;
将各原料组份投入到速度为900-1500r/min高速混料机进行混合,于混料机温度在130℃时将物料放出;
将混合好的物料转入双螺杆挤出机进行挤出、水冷造粒;
将造粒所得的色母料进行混合,于90℃温度下烘干,即得色母粒成品。
实施例5
按质量百分比称取如下各原料组分PC55%、核壳型丙烯酸酯6%、导电炭黑18%、溶剂红4%、溶剂黄3%、溶剂蓝1%、季戊四醇硬脂酸酯10%、硬脂酸钙1%、硬脂酸钡0.5%、抗氧化剂10760.2%、抗氧化剂168 1.3%,备用;
将各原料组份投入到速度为1300r/min高速混料机进行混合,于混料机温度在150℃时将物料放出;
将混合好的物料转入双螺杆挤出机进行挤出、水冷造粒;
将造粒所得的色母料进行混合,于110℃温度下烘干,即得色母粒成品。
实施例6
与实施例1的区别仅在于,原料组分中溶剂红2%、溶剂黄3%、溶剂蓝4%。其他组分含量及制备方法均与实施例1相同。
实施例7
与实施例1的区别仅在于,原料组分中乙烯-乙酸乙烯共聚物EVA蜡1.8%和聚乙烯蜡7.2%。其他组分含量及制备方法均与实施例1相同。
实施例8
与实施例1的区别仅在于,原料组分中乙烯-乙酸乙烯共聚物EVA蜡1.4%和聚乙烯蜡8.6%。其他组分含量及制备方法均与实施例1相同。
实施例9
与实施例1的区别仅在于,原料组分中硬脂酸钙0.9%、硬脂酸钡1.1%。其他组分含量及制备方法均与实施例1相同。
实施例10
与实施例1的区别仅在于,原料组分中硬脂酸钙1.4%、硬脂酸钡0.6%。其他组分含量及制备方法均与实施例1相同。
对比例1
与实施例1的区别仅在于,色母载体为PE。
对比例2
与实施例1的区别仅在于,色母载体为ABS和PC共混物。
对比例3
与实施例1的区别仅在于,原料组分中不包含硬脂酸钙和硬脂酸钡,抗氧化剂的用量为4%。
对本发明上述实施例制得的色母粒进行如下测试;
表面质量:用肉眼观察色母粒表面光泽度、黑亮程度及色度均匀性。
对实施例1-10及对比例1-3的色母粒产品测试结果如下表1所示:
表1:实施例1-10及对比例1-3的色母粒产品测试结果
通过表1的数据可以看出,以PC作为色母载体,导电炭黑作为半导电供体,合理配伍分散剂、冲击改性剂、着色剂、加工助剂,获得的半导电色母粒具有较佳的缺口冲击强度、抗拉强度、半导电性能及表面质量。
本文中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种修改或补充或采用类似的方式替代,但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。
尽管对本发明已作出了详细的说明并引证了一些具体实施例,但是对本领域熟练技术人员来说,只要不离开本发明的精神和范围可作各种变化或修正是显然的。
Claims (9)
2.根据权利要求1所述的半导电PC黑色母粒,其特征在于,所述的冲击改性剂为丙烯酸类橡胶共聚物、核壳型丙烯酸酯中的至少一种。
3.根据权利要求1所述的半导电PC黑色母粒,其特征在于,所述着色剂由溶剂红、溶剂黄、溶剂蓝按照质量比(1-3):1:(0.5-1)复合而成。
4.根据权利要求1所述的半导电PC黑色母粒,其特征在于,所述分散剂为乙烯-乙酸乙烯共聚物EVA蜡、乙撑双硬脂酰胺、聚乙烯蜡、硬脂酸酯类、有机硅油中的至少一种。
5.根据权利要求1或4所述的半导电PC黑色母粒,其特征在于,所述分散剂由乙烯-乙酸乙烯共聚物EVA蜡和聚乙烯蜡按照质量比1:(4.5-6)复合而成。
6.根据权利要求1所述的半导电PC黑色母粒,其特征在于,所述加工助剂包括润滑剂和抗氧化剂。
7.根据权利要求6所述的半导电PC黑色母粒,其特征在于,所述润滑剂由硬脂酸钙和硬脂酸钡按照质量比(1-2):1复合而成。
8.根据权利要求6所述的半导电PC黑色母粒,其特征在于,所述抗氧化剂为抗氧化剂1076、抗氧化剂168、二亚磷酸季戊四醇二硬脂醇酯中的至少一种。
9.一种如权利要求1所述的半导电PC黑色母粒的制备方法,其特征在于,所述的制备方法包括如下步骤:
S1:按重量份数称取各原料组分,备用;
S2:将各原料组份投入到速度为900-1500r/min混料机进行混合,于混料机温度在120-160℃时将物料放出;
S3:将混合好的物料转入双螺杆挤出机进行挤出、水冷造粒;
S4:将造粒所得的色母料进行混合,于80-120℃温度下烘干,即得色母粒成品。
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