CN107474676B - 一种高光硫酸钡及其制备方法 - Google Patents
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Abstract
本发明公开了一种高光硫酸钡及其制备方法,所述高光硫酸钡是采用重晶石制备得到的硫酸钡粉,具体包括以下步骤:S1、选用硫酸钡含量在98%以上的重晶石;S2、清洗原料;S3、第一次粗碎;S4、第二次破碎复选;S5、超细研磨;S6、继续研磨,添加高光剂;S7、在粉体中加入高分子分散剂。采用本发明制备方法制备得到的高光硫酸钡,具有白度高、细度好、颗粒均匀、含量高、纯度高、色泽度好等优点。
Description
技术领域
本发明涉及工业填料领域,主要涉及一种高光硫酸钡及其制备方法。
背景技术
硫酸钡具有独特的物理性质,其性能:微黄色粉末,相对密度 4.0-4.6,不溶于水、酸、碱及其他溶剂,耐热耐酸、碱、无毒,可用于与食品接触的制品,被广泛用于工业生产中,可以作为橡胶的补强填充剂,也可用于耐酸橡胶制品和一般制品,还可用作表面涂布剂、上浆剂、加重剂,亦用于颜料、陶瓷、蓄电池、搪瓷、油漆、涂料等。
硫酸钡的种类包括三种沉淀硫酸钡、高光硫酸钡、改性硫酸钡等等。沉淀硫酸钡是通过化学合沉淀法生产而成的。改性硫酸钡是为了实现提高分散性或其他功能性目的,是在沉淀硫酸钡或重晶石的基础上进行表面改性处理加工而成。其中,沉淀硫酸钡属于价格较高的原材料。高光硫酸钡能替代部分沉淀硫酸钡、钛白粉、活性二氧化硅等价格较高的原材料,是一种能吸收有害射线的环保材料,在粉末涂料中效果很好。但是,由于目前高光硫酸钡生产工艺的限制,现有高光硫酸钡只能替换极少量的沉淀硫酸钡,导致产品生产成本依然较高。
因此,现有技术还有待于改进和发展。
发明内容
鉴于上述现有技术的不足,本发明的目的在于提供一种高光硫酸钡及其制备方法,使其性能在粉末涂料的使用中可代替沉淀硫酸钡,降低粉末涂料的生产成本。
本发明的技术方案如下:
一种高光硫酸钡的制备方法,其中,所述高光硫酸钡是采用重晶石制备得到的硫酸钡粉,具体包括以下步骤:
S1、原料精选:选用硫酸钡含量在98%以上的重晶石;
S2、清洗原料:将重晶石清洗干净、风干;
S3、第一次粗碎:将重晶石破碎至3~5公分大小,用水冲洗,晾干;
S4、第二次破碎复选:将重晶石送入锤式破碎机,将重晶石破碎至5目以内;
S5、超细研磨:对重晶石进行超细研磨,粉碎至粒径为D97 2.6-3.0μm;
S6、继续研磨,添加高光剂:在粉体中加入高光剂,研磨10~20分钟;
S7、在粉体中加入高分子分散剂:加入高分子分散剂,研磨10~30分钟。
所述的高光硫酸钡的制备方法,其中,所述高光剂为聚碳酸酯和合成蜡的组合,聚碳酸酯和合成蜡为1:1;所述高分子分散剂为六偏磷酸钠。
所述的高光硫酸钡的制备方法,其中,按照重量百分比计算,所述重晶石用量占99.4%,所述高光剂占0.4%,所述高分子分散剂占0.2%。
所述的高光硫酸钡的制备方法,其中,在添加完高分子分散剂以后,还加入甲基丙烯酸甲酯或甲基丙烯酸乙酯,研磨10~30分钟。
所述的高光硫酸钡的制备方法,其中,甲基丙烯酸甲酯或甲基丙烯酸乙酯占重晶石重量的1%。
一种高光硫酸钡,其中,所述高光硫酸钡采用如上所述的高光硫酸钡的制备方法制备得到。
有益效果:采用本发明制备方法制备得到的高光硫酸钡,具有白度高、细度好、颗粒均匀、含量高、纯度高、色泽度好等优点。在粉末涂料中使用可替代价格昂贵的沉淀硫酸钡,降低粉末涂料的生产成本,本发明的高光硫酸钡光泽度高,可和沉淀硫酸钡的添加效果相同,流平性好。
具体实施方式
本发明提供一种高光硫酸钡及其制备方法,为使本发明的目的、技术方案及效果更加清楚、明确,以下对本发明进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
本发明提供一种高光硫酸钡的制备方法,所述高光硫酸钡是采用重晶石制备得到的硫酸钡粉,具体包括以下步骤:
S1、原料精选:选用硫酸钡含量在98%以上的精选优级重晶石。
S2、清洗原料:将重晶石清洗干净、风干。
S3、第一次粗碎:将重晶石破碎至3~5公分大小,用水冲洗,晾干。此步骤中是将大块的重晶石破碎至鸡蛋大小,便于后续进一步破碎步骤。同时也为了便于进一步清洗杂质,保证硫酸钡粉的纯度。此步骤中水分要充分晾干,因为在后续破碎过程中粉体变小,水分夹在粉体中不易干燥。
S4、第二次破碎复选:将重晶石送入锤式破碎机,将重晶石破碎至5目以内。第二次破碎采用锤式破碎机对重晶石进行破碎,使重晶石的大小均匀,便于后续超细研磨过程。重晶石破碎至5目以内再进行超细研磨,减少重晶石膜卡在超细研磨机器的螺杆内,进机产量高,同时也可以减少对机器的损耗。
S5、超细研磨:对重晶石进行超细研磨,粉碎至粒径为D97 2.6-3.0μm。超细研磨过程中,可以根据不同的产品需要控制粉碎的粒度,本发明所制备的硫酸钡粉用于代替粉体涂料中昂贵的沉淀硫酸钡,经过大量的生产实验证明,采用粒径为D97 2.6-3.0μm的硫酸钡粉,与粉体涂料的相容性最好,制备得到的粉体涂料的质量最好。
S6、继续研磨,添加高光剂:在粉体中加入高光剂,研磨10~20分钟。此过程是在继续研磨过程时粉体的表面形成均匀包膜。超细研磨过程中,添加高光剂,使高光剂与硫酸钡粉体混合均匀,在粉体表面形成均匀的高光膜,色泽度好、白度高。所述高光剂优选为聚碳酸酯和合成蜡的组合,聚碳酸酯和合成蜡为1:1。聚碳酸酯除了具有高光功能以外还可以增强硫酸钡粉的机械性能,也能使硫酸钡粉能与树脂更好地混合,合成蜡除了具有高光功能以外还可以使硫酸钡粉能与树脂更好地混合。本申请人是偶然发现聚碳酸酯和合成蜡的组合能使硫酸钡粉具有良好高光效果的同时,能更好的与树脂混合。
S7、在粉体中加入高分子分散剂:加入高分子分散剂,研磨10~30分钟。高分子分散剂优选为六偏磷酸钠,可以紧密牢固地结合在硫酸钡表面,达到高效率的覆盖,使硫酸钡能与粉末涂料粒子相容,并使粉末涂料体系均匀,悬浮性能增加,不沉淀,使整个体系物化性质一样。本发明中还提供重晶石、高光剂、高分子分散剂的最佳添加实施例方案,按照重量百分比计算,所述重晶石用量占99.4%,所述高光剂占0.4%,所述高分子分散剂占0.2%。
更进一步地,在添加完高分子分散剂以后,还加入甲基丙烯酸甲酯或甲基丙烯酸乙酯,研磨10~30分钟。甲基丙烯酸甲酯或甲基丙烯酸乙酯占重晶石重量的1%。通过加入甲基丙烯酸甲酯或甲基丙烯酸乙酯,与其他原料复合,可以使经过处理的硫酸钡粉增加与树脂的亲和度以及化学稳定性。
S8、由提升机到成品仓;
S9、成品包装入库。
通过上述方法制备得到的高光硫酸钡,能增强粉末涂料的流平性和保光性,并且与所有的色料有较好的兼容性,提高上粉率,减少粉末涂料用量。
采用本发明制备方法制备得到的高光硫酸钡,具有白度高、细度好、颗粒均匀、含量高、纯度高、色泽度好等优点。在粉末涂料中使用可替代价格昂贵的沉淀硫酸钡,降低粉末涂料的生产成本,本发明的高光硫酸钡光泽度高,可和沉淀硫酸钡的添加效果相同,流平性好。
以下通过具体实施例对本发明做进一步说明。
实施例1
S1、原料精选:选用硫酸钡含量在98%以上的精选优级重晶石。
S2、清洗原料:将重晶石清洗干净、风干。
S3、第一次粗碎:将重晶石破碎至3~5公分大小,用水冲洗,晾干
S4、第二次破碎复选:将重晶石送入锤式破碎机,将重晶石破碎至5目以内。
S5、超细研磨:对重晶石进行超细研磨,粉碎至粒径为D97 2.6-3.0μm。
S6、继续研磨,添加高光剂:在粉体中加入高光剂,研磨10~20分钟。所述高光剂为聚碳酸酯和合成蜡的组合,聚碳酸酯和合成蜡为1:1。
S7、在粉体中加入高分子分散剂:加入高分子分散剂,研磨10~30分钟。高分子分散剂为六偏磷酸钠。按照重量百分比计算,所述重晶石用量占99.4%,所述高光剂占0.4%,所述高分子分散剂占0.2%。
在添加完高分子分散剂以后,还加入甲基丙烯酸甲酯,研磨10~30分钟。甲基丙烯酸甲酯占重晶石重量的1%。
S8、由提升机到成品仓;
S9、成品包装入库。
在本实施例方案中,高光硫酸钡的物理性能指标和技术指标如下表1所述。
表1
将本发明实施例所得的高光硫酸钡与沉降硫酸钡用于制备粉末涂料,相同的粉末涂料配方。粉末涂料的基准配方如下:
羟基丙烯酸树脂 40份;
沉降硫酸钡/本实施例高光硫酸钡 20份;
端羧基聚酯树脂 40份;
流平剂 1份;
聚二甲基硅氧烷 0.8份;
加工助剂 适量。
在粉末涂料配方相同的情况下,沉降硫酸钡的粉末涂料与本实施例高光硫酸钡的粉末涂料,具有基本相同的流平性和光泽度高。
应当理解的是,本发明的应用不限于上述的举例,对本领域普通技术人员来说,可以根据上述说明加以改进或变换,所有这些改进和变换都应属于本发明所附权利要求的保护范围。
Claims (2)
1.一种高光硫酸钡的制备方法,其特征在于,所述高光硫酸钡是采用重晶石制备得到的硫酸钡粉,具体包括以下步骤:
S1、原料精选:选用硫酸钡含量在98%以上的重晶石;
S2、清洗原料:将重晶石清洗干净、风干;
S3、第一次粗碎:将重晶石破碎至3~5公分大小,用水冲洗,晾干;
S4、第二次破碎复选:将重晶石送入锤式破碎机,将重晶石破碎至5目以内;
S5、超细研磨:对重晶石进行超细研磨,粉碎至粒径为D972.6-3.0μm;
S6、继续研磨,添加高光剂:在粉体中加入高光剂,研磨10~20分钟;
S7、在粉体中加入高分子分散剂:加入高分子分散剂,研磨10~30分钟;
按照重量百分比计算,所述重晶石用量占99.4%,所述高光剂占0.4%,所述高分子分散剂占0.2%;所述高光剂为聚碳酸酯和合成蜡的组合,聚碳酸酯和合成蜡为1:1;所述高分子分散剂为六偏磷酸钠。
2.一种高光硫酸钡,其特征在于,所述高光硫酸钡采用如权利要求1所述的高光硫酸钡的制备方法制备得到。
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