CN106978057A - 一种聚氨酯粉末涂料及其制备方法 - Google Patents

一种聚氨酯粉末涂料及其制备方法 Download PDF

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CN106978057A
CN106978057A CN201710282194.2A CN201710282194A CN106978057A CN 106978057 A CN106978057 A CN 106978057A CN 201710282194 A CN201710282194 A CN 201710282194A CN 106978057 A CN106978057 A CN 106978057A
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鲍熊
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Chizhou Intellectual Property Service Center Co.,Ltd.
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Abstract

本发明公开了一种聚氨酯粉末涂料，各原料组分按质量份比为：端羧基聚酯树脂60‑70份、封闭型多异氰酸酯3‑5份、钛白粉10‑20份、重质碳酸钙10‑15份、流平剂0.5‑1.5份、粉末流动助剂0.5‑1.5份、滑石粉5‑10份、硫酸钡2‑5份、颜料1‑3份、边缘覆盖剂0.5‑1.5份、防结块剂0.5‑1.5份。本发明将端羧基聚酯树脂、封闭型多异氰酸酯、钛白粉、重质碳酸钙、流平剂、粉末流动助剂、滑石粉、硫酸钡、颜料、边缘覆盖剂、防结块剂经高速混合、熔融挤出、压辊压片、粉碎、筛分过滤，制成粉末涂料；具有无污染、节能环保、减轻劳动强度和涂膜平整且机械强度高的优点。

Description

一种聚氨酯粉末涂料及其制备方法
技术领域
本发明涉及电磁线生产技术领域，具体涉及一种聚氨酯粉末涂料及其制备方法。
背景技术
电磁线是用以制造电工产品中的线圈或绕组的绝缘电线，电磁线必须满足多种使用和制造工艺上的要求，包括其形状、规格、能短时和长期在高温下工作，以及承受某些场合中的强烈振动和高速下的离心力，高电压下的耐受电晕和击穿，特殊气氛下的耐化学腐蚀等。电磁线可以按其基本组成、导电线心和电绝缘层分类，通常根据电绝缘层所用的绝缘材料和制造方式分为漆包线、绕包线、漆包绕包线和无机绝缘线。
常用的电磁线大部分是使用溶剂型绝缘涂料进行涂装的，这种绝缘涂料中有机溶剂的含量在60％以上，在生产过程中不仅带来安全问题，危害生产操作人员的健康；而且在电磁线涂装过程中有机溶剂完全挥发到大气中，造成环境污染和资源浪费。
发明内容
本发明为了克服电磁线生产过程中使用有机溶剂的缺陷问题，提供一种聚氨酯粉末涂料及其制备方法，将端羧基聚酯树脂、封闭型多异氰酸酯、钛白粉、重质碳酸钙、流平剂、粉末流动助剂、滑石粉、硫酸钡、颜料、边缘覆盖剂、防结块剂经高速混合、熔融挤出、压辊压片、粉碎、筛分过滤，制成粉末涂料。
为实现上述目的，本发明采用的技术方案是：
一种聚氨酯粉末涂料，各原料组分按质量份比为：端羧基聚酯树脂60-70份、封闭型多异氰酸酯3-5份、钛白粉10-20份、重质碳酸钙10-15份、流平剂0.5-1.5份、粉末流动助剂0.5-1.5份、滑石粉5-10份、硫酸钡2-5份、颜料1-3份、边缘覆盖剂0.5-1.5份、防结块剂0.5-1.5份。
进一步地，各原料组分按质量份比为：端羧基聚酯树脂65份、封闭型多异氰酸酯4份、钛白粉15份、重质碳酸钙12份、流平剂1份、粉末流动助剂1份、滑石粉7份、硫酸钡3份、颜料2份、边缘覆盖剂1份、防结块剂1份。
进一步地，所述钛白粉、重质碳酸钙、滑石粉的粒径为800目。
进一步地，所述粉末流动助剂为经过电荷改性的低分子量聚乙烯。
进一步地，所述聚乙烯的粒径为800目。
一种聚氨酯粉末涂料制备方法，其制备步骤如下：
S1、按组成原料的重量份称取各原料；
S2、将选好的端羧基聚酯树脂、封闭型多异氰酸酯、钛白粉、重质碳酸钙、流平剂、粉末流动助剂、滑石粉、硫酸钡、颜料、边缘覆盖剂、防结块剂加入高速搅拌机中，预混5-10分钟，高速搅拌混合均匀，高速搅拌机的搅拌速度在1000-1200r/m；
S3、将步骤S2中的粉末加入到双螺杆挤出机熔融挤出、压辊压片，挤出机Ⅰ区温度为85-100℃，挤出机Ⅱ区温度为120-135℃；
S4、将步骤S3中得到的片料加入到磨粉机中磨成粉末、筛网过滤，得到粉末涂料；其中磨粉机的主磨的转速为40-50r/m，磨粉机的副磨的转速为20-30r/m，筛网为200目。
本发明的有益效果：一种聚氨酯粉末涂料及其制备方法，将端羧基聚酯树脂、封闭型多异氰酸酯、钛白粉、重质碳酸钙、流平剂、粉末流动助剂、滑石粉、硫酸钡、颜料、边缘覆盖剂、防结块剂经高速混合、熔融挤出、压辊压片、粉碎、筛分过滤，制成粉末涂料；具有无污染、节能环保、减轻劳动强度和涂膜平整且机械强度高的优点。
具体实施方式
实施例1
一种聚氨酯粉末涂料，各原料组分按质量份比为：端羧基聚酯树脂60份、封闭型多异氰酸酯3份、钛白粉10份、重质碳酸钙10份、流平剂0.5份、粉末流动助剂0.5份、滑石粉5份、硫酸钡2份、颜料1份、边缘覆盖剂0.5份、防结块剂0.5份。钛白粉、重质碳酸钙、滑石粉的粒径为800目。粉末流动助剂为经过电荷改性的低分子量聚乙烯，聚乙烯的粒径为800目。
一种聚氨酯粉末涂料制备方法，其制备步骤如下：
S1、按组成原料的重量份称取各原料；
S2、将选好的端羧基聚酯树脂、封闭型多异氰酸酯、钛白粉、重质碳酸钙、流平剂、粉末流动助剂、滑石粉、硫酸钡、颜料、边缘覆盖剂、防结块剂加入高速搅拌机中，预混5-10分钟，高速搅拌混合均匀，高速搅拌机的搅拌速度在1000-1200r/m；
S3、将步骤S2中的粉末加入到双螺杆挤出机熔融挤出、压辊压片，挤出机Ⅰ区温度为85-100℃，挤出机Ⅱ区温度为120-135℃；
S4、将步骤S3中得到的片料加入到磨粉机中磨成粉末、筛网过滤，得到粉末涂料；其中磨粉机的主磨的转速为40-50r/m，磨粉机的副磨的转速为20-30r/m，筛网为200目。
实施例2
一种聚氨酯粉末涂料，各原料组分按质量份比为：端羧基聚酯树脂65份、封闭型多异氰酸酯4份、钛白粉15份、重质碳酸钙12份、流平剂1份、粉末流动助剂1份、滑石粉7份、硫酸钡3份、颜料2份、边缘覆盖剂1份、防结块剂1份。钛白粉、重质碳酸钙、滑石粉的粒径为800目。粉末流动助剂为经过电荷改性的低分子量聚乙烯，聚乙烯的粒径为800目。
一种聚氨酯粉末涂料制备方法，其制备步骤如下：
S1、按组成原料的重量份称取各原料；
S2、将选好的端羧基聚酯树脂、封闭型多异氰酸酯、钛白粉、重质碳酸钙、流平剂、粉末流动助剂、滑石粉、硫酸钡、颜料、边缘覆盖剂、防结块剂加入高速搅拌机中，预混5-10分钟，高速搅拌混合均匀，高速搅拌机的搅拌速度在1000-1200r/m；
S3、将步骤S2中的粉末加入到双螺杆挤出机熔融挤出、压辊压片，挤出机Ⅰ区温度为85-100℃，挤出机Ⅱ区温度为120-135℃；
S4、将步骤S3中得到的片料加入到磨粉机中磨成粉末、筛网过滤，得到粉末涂料；其中磨粉机的主磨的转速为40-50r/m，磨粉机的副磨的转速为20-30r/m，筛网为200目。
实施例3
一种聚氨酯粉末涂料，各原料组分按质量份比为：端羧基聚酯树脂70份、封闭型多异氰酸酯5份、钛白粉20份、重质碳酸钙15份、流平剂1.5份、粉末流动助剂1.5份、滑石粉10份、硫酸钡5份、颜料3份、边缘覆盖剂1.5份、防结块剂1.5份。钛白粉、重质碳酸钙、滑石粉的粒径为800目。粉末流动助剂为经过电荷改性的低分子量聚乙烯，聚乙烯的粒径为800目。
一种聚氨酯粉末涂料制备方法，其制备步骤如下：
S1、按组成原料的重量份称取各原料；
S2、将选好的端羧基聚酯树脂、封闭型多异氰酸酯、钛白粉、重质碳酸钙、流平剂、粉末流动助剂、滑石粉、硫酸钡、颜料、边缘覆盖剂、防结块剂加入高速搅拌机中，预混5-10分钟，高速搅拌混合均匀，高速搅拌机的搅拌速度在1000-1200r/m；
S3、将步骤S2中的粉末加入到双螺杆挤出机熔融挤出、压辊压片，挤出机Ⅰ区温度为85-100℃，挤出机Ⅱ区温度为120-135℃；
S4、将步骤S3中得到的片料加入到磨粉机中磨成粉末、筛网过滤，得到粉末涂料；其中磨粉机的主磨的转速为40-50r/m，磨粉机的副磨的转速为20-30r/m，筛网为200目。
将上述实施例1-3制备的粉末涂料采用静电喷涂的方法喷涂于经过预处理的钢板基材上，固化后自然冷却24小时，测试涂膜性能，测试结果如表一。
表一：粉末涂料性能测试表
本发明将端羧基聚酯树脂、封闭型多异氰酸酯、钛白粉、重质碳酸钙、流平剂、粉末流动助剂、滑石粉、硫酸钡、颜料、边缘覆盖剂、防结块剂经高速混合、熔融挤出、压辊压片、粉碎、筛分过滤，制成粉末涂料；具有无污染、节能环保、减轻劳动强度和涂膜平整且机械强度高的优点。
上面所述的实施例仅仅是对本发明的优选实施方式进行描述，并非对本发明的构思和范围进行限定。在不脱离本发明设计构思的前提下，本领域普通人员对本发明的技术方案做出的各种变型和改进，均应落入到本发明的保护范围。

Claims (6)

1.一种聚氨酯粉末涂料，其特征在于，各原料组分按质量份比为：端羧基聚酯树脂60-70份、封闭型多异氰酸酯3-5份、钛白粉10-20份、重质碳酸钙10-15份、流平剂0.5-1.5份、粉末流动助剂0.5-1.5份、滑石粉5-10份、硫酸钡2-5份、颜料1-3份、边缘覆盖剂0.5-1.5份、防结块剂0.5-1.5份。
2.如权利要求1所述的一种聚氨酯粉末涂料，其特征在于，各原料组分按质量份比为：端羧基聚酯树脂65份、封闭型多异氰酸酯4份、钛白粉15份、重质碳酸钙12份、流平剂1份、粉末流动助剂1份、滑石粉7份、硫酸钡3份、颜料2份、边缘覆盖剂1份、防结块剂1份。
3.如权利要求1所述的一种聚氨酯粉末涂料，其特征在于：所述钛白粉、重质碳酸钙、滑石粉的粒径为800目。
4.如权利要求1所述的一种聚氨酯粉末涂料，其特征在于：所述粉末流动助剂为经过电荷改性的低分子量聚乙烯。
5.如权利要求4所述的一种聚氨酯粉末涂料，其特征在于：所述聚乙烯的粒径为800目。
6.如权利要求1所述的一种聚氨酯粉末涂料制备方法，其特征在于，其制备步骤如下：
S1、按组成原料的重量份称取各原料；
S2、将选好的端羧基聚酯树脂、封闭型多异氰酸酯、钛白粉、重质碳酸钙、流平剂、粉末流动助剂、滑石粉、硫酸钡、颜料、边缘覆盖剂、防结块剂加入高速搅拌机中，预混5-10分钟，高速搅拌混合均匀，高速搅拌机的搅拌速度在1000-1200r/m；
S3、将步骤S2中的粉末加入到双螺杆挤出机熔融挤出、压辊压片，挤出机Ⅰ区温度为85-100℃，挤出机Ⅱ区温度为120-135℃；
S4、将步骤S3中得到的片料加入到磨粉机中磨成粉末、筛网过滤，得到粉末涂料；其中磨粉机的主磨的转速为40-50r/m，磨粉机的副磨的转速为20-30r/m，筛网为200目。
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