CN103073852A - 一种具有高cti阻燃pbt/abs合金材料及其制备方法 - Google Patents
一种具有高cti阻燃pbt/abs合金材料及其制备方法 Download PDFInfo
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Abstract
本发明公开一种具有高CTI阻燃PBT/ABS合金材料及制备方法。所述具有高CTI阻燃PBT/ABS合金材料,由基本组分和玻璃纤维组成,所述基本组分由如下按重量百分数计算的组分组成:1)聚对苯二甲酸丁二醇酯34~76%;2)ABS树脂10~30%;3)相容剂3~10%;4)复合阻燃剂10~24%;5)抗氧剂0.2~1.0%;6)润滑剂0.3~1.0%;所述玻璃纤维的用量为相对于上述基本组分总重量0~35%。本发明提供的PBT/ABS合金材料具有高CTI值、高阻燃性、相容性好、冲击韧性好、加工性能优异、材料成本低等特点,在电子电气、汽车、家电等领域具有极为广阔的应用。
Description
技术领域
本发明属于工程塑料领域,具体涉及一种具有高CTI阻燃PBT/ABS合金材料及其制备方法。
背景技术
PBT是由美国Celanese公司在20世纪70年代开发并工业化生产的一类较新的热塑料工程塑料,具有以下特性:(1)结晶速度快,可快速成型;(2)吸水率低,电气性能优异且随温湿度变化小;(3)耐候性好,适于户外使用,且耐药品性优异;(4)力学性能优良。纯PBT树脂有优异的冲击韧性,但对缺口敏感, (5)突出的耐摩擦和耐磨耗特性,磨耗量比POM还小。由此可见,PBT综合性能卓越,因而已成为通用工程塑料中工业化最晚而发展速度最快的1个品种。
ABS树脂是目前产量最大,应用最广泛的塑料,价格也比较便宜。它不仅具有韧、硬、刚相均衡的力学性能,而且具有较好的尺寸稳定性、表面光泽度、耐低温性、着色加工性和加工流动性。可以预计,将ABS/PBT共混,可以制得性能优异的塑料合金,实现树脂高性能化。
ABS/PBT合金充分利用了PBT的结晶性和ABS的非结晶性特征,材料具有优良的成型性、尺寸稳定性和耐药品性,缺口冲击强度较PBT大大提高,同时具有高CTI值、阻燃的PBT/ABS合金材料不仅具有优良的成型加工、抗冲击、耐高温热老化、耐化学药品等优点,而且具有高CTI值、高阻燃性等综合性能,从而可以更加广泛的应用于电子电器、汽车、通讯器材、低压电器等。但现有技术中,在对PBT/ABS合金材料的研发中,很难同时满足高阻燃性及高CTI值,通常是提高了阻燃性,则CTI值达不到要求。因此,开发一种同时具有高CTI及高阻燃性能的PBT/ABS合金材料十分有意义。
发明内容
本发明的目的在于克服现有技术不足,提供一种同时具有高CTI和高阻燃的PBT/ABS合金材料。
本发明的另一目的在于提供所述具有高CTI阻燃PBT/ABS合金材料的制备方法。
本发明的上述目的通过如下技术方案予以实现:
一种具有高CTI阻燃PBT/ABS合金材料,其特征在于,所述合金材料由基本组分组成,所述基本组分由如下按重量百分数计算的组分组成:
1)聚对苯二甲酸丁二醇酯 34~76%;
2)ABS树脂 10~30%;
3)相容剂 3~10%;
4)复合阻燃剂 10~24%;
5)抗氧剂 0.2~1.0%;
6)润滑剂 0.3~1.0%;
所述玻璃纤维的用量为相对于上述基本组分总重量0~30%;
所述聚对苯二甲酸丁二醇酯的熔体流动速率为30~40g/min(230℃,2.16kg);
所述ABS树脂为丁二烯单元含量为12~18质量%的ABS树脂;
所述复合阻燃剂由数均分子量10000~15000的三溴苯酚封端溴化环氧树脂与三氧化二锑按重量比8~12:2~5复配组成;或数均分子量10000~15000的三溴苯酚封端溴化环氧树脂、三氧化二锑及硼酸锌按重量比8~12: 2~5: 2~5复配组成。
相容剂可以是本领域常用的相容剂,作为一种优选方案,所述相容剂优选为马来酸酐接枝ABS。
作为一种最优选方案,所述相容剂最优选为接枝率为1.5%的马来酸酐接枝ABS。
作为一种优选方案,所述抗氧化剂优选为受阻酚类抗氧化剂与亚磷酸酯类抗氧化剂的复配。
作为一种更优选方案,所述抗氧化剂更优选为抗氧剂1098与抗氧剂168的复配。
作为一种优选方案,所述润滑剂优选为硅酮粉MB-4和/或TAF润滑剂。
玻璃纤维在PBT/ABS合金材料作为一种增强成分,可以提高合金材料的机械性能。作为一种优选方案,所述玻璃纤维优选为无碱玻璃纤维。
所述具有高CTI阻燃PBT/ABS合金材料的制备方法,其特征在于,包括如下步骤:
(1)先将聚对苯二甲酸丁二醇酯进行干燥,使其水分含量在0.1重量%以下,然后加入ABS树脂、相容剂、复合阻燃剂、抗氧剂、润滑剂在高速混料机中混合,使各组分充分搅拌分散均匀;
(2)将混合好的物料加入双螺杆挤出机中,在熔融挤出的同时,在第5节螺筒中引入玻璃纤维熔融挤出,熔融挤出的温度为180~230℃;螺杆转速为300~400转/分;
(3)对挤出物料进行冷却、风干、切粒、过强磁、包装,得到成品。
与现有技术相比,本发明具有如下有益效果:
本发明在保证基本不降低PBT/ABS合金材料物理机械性能的优势下,添加复合阻燃剂达到阻燃UL94V-0级(0.8mm)的同时,CTI有原来的250V提高到400V;而且,与非阻燃的PBT/ABS合金相比线性膨胀系数可以降低20%以下,热变形温度增加10℃,并且材料的耐热性和抗翘曲性均有明显提高;本发明提供的PBT/ABS合金材料具有高CTI值、高阻燃性、相容性好、冲击韧性好、加工性能优异、材料成本低等特点,在电子电气、汽车、家电等领域具有极为广阔的应用。
具体实施方式
以下结合具体实施例进一步解释本发明,但实施例并不对本发明作任何形式的限定。实施例中所涉及的原料均是本领域常用的物质,均为市售产品。
实施例中,所述聚对苯二甲酸丁二醇酯的熔体流动速率在230℃,2.16Kg条件下为30~40g/min。
所述ABS树脂为丁二烯单元含量为12~18质量%的ABS树脂。
所用的马来酸酐接枝ABS为接枝率为1.5%的马来酸酐接枝ABS。
实施例1和2中,所用的溴化环氧树脂为数均分子量12000的三溴苯酚封端溴化环氧树脂;
实施例3和4中,所用的溴化环氧树脂为数均分子量14000的三溴苯酚封端溴化环氧树脂。
实施例1
(1)基料的混合:先将占基料重量44 %聚对苯二甲酸丁二醇酯在120℃下烘3小时,使其水分含量在0.1重量%以下,然后加入占基料重量25%ABS树脂、占基料重量8%马来酸酐接枝ABS、占基料重量22%复合阻燃剂,所述复合阻燃剂中(溴化环氧树脂、三氧化二锑及硼酸锌的重量比为12:5:5)、占基料重量0.2%受阻酚类抗氧剂1098和占基料重量0.2%三(2,4-二叔丁基苯基)亚磷酸酯(抗氧剂168)、占基料重量0.6%润滑剂在高速混料机中混合2分钟,使各组分充分搅拌分散均匀;
(2)将混合好的物料加入双螺杆挤出机中,熔融挤出的温度为180~230℃;螺杆转速为400转/分;
(3)对挤出物料进行冷却、风干、切粒、过强磁、包装,得到成品。
实施例2
(1)基料的混合:先将占基料重量68 %聚对苯二甲酸丁二醇酯在120℃下烘3小时,使其水分含量在0.1重量%以下,然后加入占基料重量12%ABS树脂、占基料重量4%马来酸酐接枝ABS、占基料重量15%复合阻燃剂,所述复合阻燃剂中溴化环氧树脂、三氧化二锑及硼酸锌的重量比为9:3:3、占基料重量0.4%受阻酚类抗氧剂1098和占基料重量0.2%三(2,4-二叔丁基苯基)亚磷酸酯(抗氧剂168)、占基料重量0.4%润滑剂在高速混料机中混合2分钟,使各组分充分搅拌分散均匀;
(2)将混合好的物料加入双螺杆挤出机中,熔融挤出的温度为180~230℃;螺杆转速为400转/分;
(3)对挤出物料进行冷却、风干、切粒、过强磁、包装,得到成品。
实施例3
(1)基料的混合:先将占基料重量48 %聚对苯二甲酸丁二醇酯在120℃下烘3小时,使其水分含量在0.1重量%以下,然后加入占基料重量22%ABS树脂、占基料重量9%马来酸酐接枝ABS、占基料重量20%复合阻燃剂,所述复合阻燃剂中(溴化环氧树脂、三氧化二锑的重量比为15:5)、占基料重量0.2%受阻酚类抗氧剂1098和占基料重量0.2%三(2,4-二叔丁基苯基)亚磷酸酯(抗氧剂168)、占基料重量0.6%润滑剂在高速混料机中混合2分钟,使各组分充分搅拌分散均匀;
(2)将混合好的物料加入双螺杆挤出机中,熔融挤出的温度为180~230℃;螺杆转速为400转/分;
(3)对挤出物料进行冷却、风干、切粒、过强磁、包装,得到成品。
实施例4
(1)基料的混合:先将占基料重量61 %聚对苯二甲酸丁二醇酯在120℃下烘3小时,使其水分含量在0.1重量%以下,然后加入占基料重量15%ABS树脂、占基料重量5%马来酸酐接枝ABS、占基料重量18%复合阻燃剂,所述复合阻燃剂中溴化环氧树脂、三氧化二锑及硼酸锌的重量比为12:6、占基料重量0.4%受阻酚类抗氧剂1098和占基料重量0.2%三(2,4-二叔丁基苯基)亚磷酸酯(抗氧剂168)、占基料重量0.4%润滑剂在高速混料机中混合2分钟,使各组分充分搅拌分散均匀;
(2)将混合好的物料加入双螺杆挤出机中,熔融挤出的温度为180~230℃;螺杆转速为400转/分;
(3)对挤出物料进行冷却、风干、切粒、过强磁、包装,得到成品。
性能测试
根据表1的测试标准,对实施例1~4的PBT/ABS合金材料进行测定,结果如表1所示:
Claims (6)
1.一种具有高CTI阻燃PBT/ABS合金材料,其特征在于,所述合金材料由基本组分和玻璃纤维组成,所述基本组分由如下按重量百分数计算的组分组成:
1)聚对苯二甲酸丁二醇酯 34~76%;
2)ABS树脂 10~30%;
3)相容剂 3~10%;
4)复合阻燃剂 10~24%;
5)抗氧剂 0.2~1.0%;
6)润滑剂 0.3~1.0%;
所述玻璃纤维的用量为相对于上述基本组分总重量0~30%;
所述聚对苯二甲酸丁二醇酯的熔体流动速率在230℃,2.16Kg条件下为30~40g/min;
所述ABS树脂为丁二烯单元含量为12~18质量%的ABS树脂;
所述复合阻燃剂由数均分子量10000~15000的三溴苯酚封端溴化环氧树脂与三氧化二锑按重量比8~12:2~5复配组成;或数均分子量10000~15000的三溴苯酚封端溴化环氧树脂、三氧化二锑及硼酸锌按重量比8~12: 2~5: 2~5复配组成。
2.如权利要求1所述具有高CTI阻燃PBT/ABS合金材料,其特征在于,所述相容剂为接枝率为1.5%的马来酸酐接枝ABS。
3.如权利要求1所述具有高CTI阻燃PBT/ABS合金材料,其特征在于,所述抗氧化剂为受阻酚类抗氧化剂与亚磷酸酯类抗氧化剂的复配。
4.如权利要求1所述具有高CTI阻燃PBT/ABS合金材料,其特征在于,所述抗氧化剂为抗氧剂1098与抗氧剂168的复配。
5.如权利要求1所述具有高CTI阻燃PBT/ABS合金材料,其特征在于,所述润滑剂为硅酮粉MB-4和/或TAF润滑剂。
6.权利要求1~5任意一项权利要求所述具有高CTI阻燃PBT/ABS合金材料的制备方法,其特征在于,包括如下步骤:
(1)先将聚对苯二甲酸丁二醇酯进行干燥,使其水分含量在0.1重量%以下,然后加入ABS树脂、相容剂、复合阻燃剂、抗氧剂、润滑剂在高速混料机中混合,使各组分充分搅拌分散均匀;
(2)将混合好的物料加入双螺杆挤出机中,在熔融挤出的同时,在第5节螺筒中引入玻璃纤维熔融挤出,熔融挤出的温度为180~230℃;螺杆转速为300-400转/分;
(3)对挤出物料进行冷却、风干、切粒、过强磁、包装,得到成品。
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