CN106854318A - 一种免喷涂san/pmma复合材料及其制备方法 - Google Patents

一种免喷涂san/pmma复合材料及其制备方法 Download PDF

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CN106854318A
CN106854318A CN201710004328.4A CN201710004328A CN106854318A CN 106854318 A CN106854318 A CN 106854318A CN 201710004328 A CN201710004328 A CN 201710004328A CN 106854318 A CN106854318 A CN 106854318A
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spray
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赖成碚
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Shenzhen Spray Free Material Technology Co ltd
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Acer Jingtai Shenzhen New Mstar Technology Ltd
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Abstract

本发明提供一种免喷涂SAN/PMMA复合材料,包括以下组分:SAN树脂:30~55份;PMMA树脂:30~55份;增韧剂:10~45份;免喷涂色母:2~8份;紫外吸收剂:0.05~0.5份;抗氧化剂:0.1~0.4份,该复合材料制备方法如下:将免喷涂色母放于85℃干燥箱中干燥3小时;取SAN、PMMA、增韧剂、免喷涂色母、紫外吸收剂、抗氧剂,在高速混合机中混合均匀,混合时间为2‑3分钟;将混合物在挤出机中进行熔融共混、挤出造粒。本发明具有高硬度、耐擦划、高流动、耐候级的特点。

Description

一种免喷涂SAN/PMMA复合材料及其制备方法
技术领域
本发明属于高分子工程塑料高性能化、多功能化改性技术领域,尤其涉及一种免喷涂SAN/PMMA复合材料及其制备方法。
背景技术
随着目前国内外各种关于环保法律法规的不断出台和完善,绿色环保已经成为当今世界的主流趋势,同时随着近两年国内各项环保政策的不断落地,可替代喷涂产品的免喷涂材料已受到家电、汽车、玩具等领域终端客户的不断亲睐,而相应的材料厂家则争先恐后的进行免喷涂材料的研究和应用开发,如:各种珠光、幻彩效果、仿金属效果、苹果白效果等。
由于免喷涂材料在注塑成型过程中样件表面易产生熔接线和流痕,且样件表面硬度较低,材料的耐擦划性能较差,因此目前相应的整机厂家多采用在样件表面进行喷涂、罩光、电镀等方式来实现珠光、钢琴烤漆等效果,同时实现样件表面硬度及耐擦划等性能,但采用免喷涂技术实施难度较大,如:光泽度不够、外观质感不强烈、材料着色强度差等,尤其致命的缺点是材料表面硬度低,耐刮擦性能达不到某些客户的使用要求,因而在一定程度上影响了免喷涂材料的使用。
发明内容
本发明针对以上技术问题,提供一种免喷涂SAN/PMMA复合材料及其制备方法,具有高硬度、耐擦划、高流动、耐候级的特点。
优选地,本发明采用的技术方案如下,一种免喷涂SAN/PMMA复合材料,包括以下组分:
SAN树脂:30~55份;
PMMA树脂:30~55份;
增韧剂:10~45份;
免喷涂色母:2~8份;
紫外吸收剂:0.05~0.5份;
抗氧化剂:0.1~0.4份。
更为优选地,包括以下组分:
SAN树脂:35~53份;
PMMA树脂:32~51份;
增韧剂:15~40份;
免喷涂色母:3~6份;
紫外吸收剂:0.1~0.4份;
抗氧化剂:0.2~0.4份。
更为优选地,所述SAN树脂中丙烯腈的含量为14~25%,其维卡软化点大于105℃,在200℃,5Kg的测试条件下,熔融指数为15~25g/10min,所述PMMA树脂的维卡软化点大于110℃,在200℃,5Kg的测试条件下,熔融指数为2.5~22g/10min。
更为优选地,所述增韧剂为具有核壳结构的丙烯酸酯类共聚物,其平均粒径为100~400nm。
更为优选地,所述免喷涂色母包括载体树脂、炭黑颜料、分散剂以及润滑剂。
更为优选地,所述载体树脂重量含量为50~70%,炭黑颜料的重量含量为20~35%,分散剂重量含量为5~10%,润滑剂重量含量为5~15%。
更为优选地,所述载体树脂为SAN或PMMA,优选为SAN,所述炭黑颜料为炭黑、色素、染料等的一种或几种,优选为炭黑和染料的共混物,所述分散剂为EVA蜡、PE、EBS等的一种或几种,优选为EVA蜡,所述润滑剂优选为白油。
更为优选地,抗氧化剂为型号为1010的受阻酚抗氧化剂,辅抗氧化剂为型号为168的受阻酚抗氧化剂,其比例为3:1~1:1,优选为1:1。
一种制备免喷涂SAN/PMMA复合材料的方法,包括以下步骤:
(1)将免喷涂色母放于85℃干燥箱中干燥3小时;
(2)取SAN、PMMA、增韧剂、免喷涂色母、紫外吸收剂、抗氧剂,在高速混合机中混合均匀,混合时间为2-3分钟;
(3)将混合物在双螺杆挤出机中进行熔融共混、挤出造粒。
其中,制备免喷涂色母的方法为:将载体树脂、炭黑颜料、分散剂、润滑剂及抗氧剂在小型高混机中充分混合均匀,混合时间为2~3分钟,然后将混合物在挤出机中进行熔融共混、挤出造粒,得到免喷涂色母备用。
优选地,制备免喷涂色母时,挤出机加热温度为180~215℃,机头挤出温度为195~205℃,挤出机螺杆转速为45~65转/分,加料转速为30-55转/分;制备复合材料时,挤出机热温度为190~240℃,机头挤出温度为200~215℃,挤出机螺杆转速为30~40转/分,加料转速为20~35转/分。
本发明采用高分子材料共混复合改性技术,利用特殊着色方法、分散技术、材料增韧技术,实现一种汽车用高硬度、耐擦划、高流动、耐候级免喷涂材料(SAN/PMMA)的制备,并将其应用在汽车立柱、格气栅等部件,可减少材料加工工艺,降低环境污染,本发明方法简单易操作,耗时短,所需原材料易得,且可根据需求改变免喷涂色母而制备不同外观效果(不同色彩)的免喷涂美学材料,从而满足汽车各部位的需求,并可根据产品的需求扩展到家电、小家电、饮水机、健康环保等产品上。
具体实施方式
下面对本发明进行详细地介绍,应当理解,以下只是介绍本发明的具体实施方式,并不在于限定本发明的保护范围。
下表1为本发明以及对比例的各组分配方原料以及其重量(其中实施例1-3为本发明的各组分配方原料,对比例1和2为两个对比例):
表1免喷涂SAN/PMMA复合材料的原料配比 单位:Kg
组分 实施例1 实施例2 实施例3 对比例1 对比例2
SAN 41 40 36 86 49
PMMA 40 36 30 0 46
增韧剂 15 20 30 10 0
免喷涂色母 4 4 4 4 4
紫外吸收剂 0.1 0.1 0.1 0.1 0.1
抗氧化剂 0.2 0.2 0.2 0.2 0.2
其中,抗氧化剂的占比为:主抗1010:辅抗168=3:1,优选为1:1。
其中,实施例1-3以及对比例1和2中的免喷涂色母所采用的制备方法如下:
将载体树脂、炭黑颜料、分散剂、润滑剂及抗氧剂在小型高混机中充分混合均匀,混合时间为2~3分钟,然后将混合物在挤出机中进行熔融共混、挤出造粒,得到免喷涂色母。
载体树脂为SAN或PMMA,优选为SAN,炭黑颜料为炭黑、色素、染料等的一种或几种,优选为炭黑和染料的共混物,分散剂为EVA蜡、PE、EBS等的一种或几种,优选为EVA蜡,润滑剂优选为白油。
上述载体树脂、炭黑颜料、分散剂、润滑剂组分占比为:载体树脂重量含量为50~70%,炭黑颜料的重量含量为20~35%,分散剂重量含量为5~10%,润滑剂重量含量为5~15%。
熔融共混、挤出造粒条件:挤出机加热温度为180~215℃,机头挤出温度为195~205℃,挤出机螺杆转速为45~65转/分,加料转速为30-55转/分。
接下来制备SAN/PMMA复合材料,具体为以下步骤:
(1)将免喷涂色母放于85℃干燥箱中干燥3小时;
(2)取SAN(丙烯腈的含量为14~25%,其维卡软化点大于105℃,在200℃,5Kg的测试条件下,熔融指数为15~25g/10min)、PMMA(维卡软化点大于110℃,在200℃,5Kg的测试条件下,熔融指数为2.5~22g/10min)、增韧剂(具有核壳结构的丙烯酸酯类共聚物,其平均粒径为100~400nm)、免喷涂色母、紫外吸收剂(水杨酸酯类、苯酮类、苯并***类等的一种或多种,优选为苯酮类和苯并***类的复配型体系)、抗氧剂,在高速混合机中混合均匀,混合时间为2-3分钟;
(3)将混合物在挤出机中进行熔融共混、挤出造粒。
(4)挤出机热温度为190~240℃,机头挤出温度为200~215℃。挤出机螺杆转速为30~40转/分,加料转速为20~35转/分。加热温度段设定为:1段/190℃,2段/200℃,3段/210℃,4段/220℃,5段/230℃,6段/240℃,7段/230℃,8段/220℃,9段/210℃,机头挤出温度为215℃。
根据上面采用的制备方法所制备的实施例以及对比例的材料,进行测试,拉伸强度、断裂伸长率按照国标GB/T1040.2-2006进行测试;弯曲强度、弯曲模量按照国标GB/T9341-2000进行测试;悬臂梁缺口冲击强度按照国标GB/T1843-2008进行测试;熔体流动速率按照国标GB/T3682-2000进行测试;铅笔硬度按照国标GB/T6739-1996进行测试,其中,铅笔硬度的等级从低到高依次为:6B、5B、4B、3B、2B、B、HB、F、H、2H、3H、4H、5H、6H、7H、8H、9H。
表2为为本发明以及对比例所制得的材料的性能列表。
表2复合材料性能
因此,从表2中可以看出,根据实施例1-3以及对比例1和2,实施例1-3制备得到的免喷涂材料具备良好硬度和力学性能,硬度可达到2H级别,熔体流动速率大约在18~21g/10min之间,缺口冲击强度大约在9-15KJ/m2之间。
同时,通过比较对比例1与本发明的实施例,可以看到,纯SAN与增韧剂、免喷涂色母、紫外吸收剂及抗氧剂熔融共混制备的复合材料,虽然材料可以达到较好外观效果和相应的力学性能,但材料表面硬度太差,无法满足使用要求。
比较对比例2与本发明的实施例,可以看到,将SAN、PMMA与免喷涂色母、紫外吸收剂、抗氧剂等熔融共混,虽然可以达到较好的外观效果及表面硬度,但因没有加入增韧剂,材料综合性能无法兼顾,尤其是冲击强度数据太低,在实际应用中受到较大限制。
本发明的实施例只是介绍其具体实施方式,不在于限制其保护范围。本行业的技术人员在本实施例的启发下可以作出某些修改,故凡依照本发明专利范围所做的等效变化或修饰,均属于本发明专利权利要求范围内。

Claims (10)

1.一种免喷涂SAN/PMMA复合材料,其特征在于,包括以下组分:
SAN树脂:30~55份;
PMMA树脂:30~55份;
增韧剂:10~45份;
免喷涂色母:2~8份;
紫外吸收剂:0.05~0.5份;
抗氧化剂:0.1~0.4份。
2.根据权利要求1所述的一种免喷涂SAN/PMMA复合材料,其特征在于,包括以下组分:
SAN树脂:35~53份;
PMMA树脂:32~51份;
增韧剂:15~40份;
免喷涂色母:3~6份;
紫外吸收剂:0.1~0.4份;
抗氧化剂:0.2~0.4份。
3.根据权利要求1所述的一种免喷涂SAN/PMMA复合材料,其特征在于,所述SAN树脂中丙烯腈的含量为14~25%,其维卡软化点大于105℃,在200℃,5Kg的测试条件下,熔融指数为15~25g/10min,所述PMMA树脂的维卡软化点大于110℃,在200℃,5Kg的测试条件下,熔融指数为2.5~22g/10min。
4.根据权利要求1所述的一种免喷涂SAN/PMMA复合材料,其特征在于,所述增韧剂为具有核壳结构的丙烯酸酯类共聚物,其平均粒径为100~400nm。
5.根据权利要求1所述的一种免喷涂SAN/PMMA复合材料,其特征在于,所述免喷涂色母包括载体树脂、炭黑颜料、分散剂以及润滑剂。
6.根据权利要求5述的一种免喷涂SAN/PMMA复合材料,其特征在于,所述载体树脂重量含量为50~70%,炭黑颜料的重量含量为20~35%,分散剂重量含量为5~10%,润滑剂重量含量为5~15%。
7.根据权利要求6所述的一种免喷涂SAN/PMMA复合材料,其特征在于,所述载体树脂为SAN或PMMA,优选为SAN,所述炭黑颜料为炭黑、色素、染料等的一种或几种,优选为炭黑和染料的共混物,所述分散剂为EVA蜡、PE、EBS的一种或几种,优选为EVA蜡,所述润滑剂优选为白油。
8.根据权利要求1所述的一种免喷涂SAN/PMMA复合材料,其特征在于,抗氧化剂为型号为1010的受阻酚抗氧化剂,辅抗氧化剂为型号为168的受阻酚抗氧化剂,其比例为3:1~1:1,优选为1:1。
9.一种制备如权利要求1-8任一所述的免喷涂SAN/PMMA复合材料的方法,其特征在于,包括以下步骤:
(1)将免喷涂色母放于85℃干燥箱中干燥3小时;
(2)取SAN、PMMA、增韧剂、免喷涂色母、紫外吸收剂、抗氧剂,在高速混合机中混合均匀,混合时间为2-3分钟;
(3)将混合物在双螺杆挤出机中进行熔融共混、挤出造粒;
其中,制备免喷涂色母的方法为:将载体树脂、炭黑颜料、分散剂、润滑剂及抗氧剂在小型高混机中充分混合均匀,混合时间为2~3分钟,然后将混合物在挤出机中进行熔融共混、挤出造粒,得到免喷涂色母备用。
10.根据权利要求9所述的免喷涂SAN/PMMA复合材料的方法,其特征在于,制备免喷涂色母时,挤出机加热温度为180~215℃,机头挤出温度为195~205℃,挤出机螺杆转速为45~65转/分,加料转速为30-55转/分;制备复合材料时,挤出机热温度为190~240℃,机头挤出温度为200~215℃,挤出机螺杆转速为30~40转/分,加料转速为20~35转/分。
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