CN105837856A - 一种无机阻燃剂的制备方法 - Google Patents

一种无机阻燃剂的制备方法 Download PDF

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CN105837856A
CN105837856A CN201610199202.2A CN201610199202A CN105837856A CN 105837856 A CN105837856 A CN 105837856A CN 201610199202 A CN201610199202 A CN 201610199202A CN 105837856 A CN105837856 A CN 105837856A
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陈旭
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Abstract

本发明公开了一种无机阻燃剂的制备方法,是由改性水镁石和改性氢氧化铝混合制成,包括以下步骤:将水镁石超细研磨后矿浆中加入KH550硅烷偶联剂和JL‑ G02FL超分散偶联改性剂,搅拌反应30~60分钟,再过滤烘干;改性氢氧化铝是将硅烷偶联剂ZQ‑172干法改性氢氧化铝。本方法可增强无机阻燃剂与树脂的相互作用,广泛用于低烟低卤和无烟无卤塑料等领域。

Description

一种无机阻燃剂的制备方法
本发明是原申请(申请号:201410002874.0,申请日:2014年1月5日,发明名称:一种低烟无卤环保EVA/LLDPE阻燃复合材料)的分案申请。
技术领域
本发明属于EVA材料技术领域,具体涉及一种低烟无卤环保EVA/LLDPE阻燃复合材料。
背景技术
乙烯—醋酸乙烯共聚物(EVA)因具有良好的柔韧性、光学性能、耐低温性能及耐环境应力开裂性,而被广泛应用于发泡材料、功能性棚膜、包装膜,热熔胶、电线电缆及玩具等领域。但EVA同大多数聚合物一样,容易燃烧,且放热量大、发烟量大,并释放有毒气体,从而大大限制了EVA的应用。
含卤阻燃剂具有优良的阻燃性能,曾被广泛应用,但在火灾发生时,这类含卤阻燃材料会产生大量的烟雾和有毒的腐蚀性卤化氢气体,造成“二次危害”。
针对以上问题,本发明采用无卤、低烟、低毒的环保型阻燃剂制备阻燃EVA复合材料。该复合材料不但阻燃效果好,并且机械性能优良,即使发生火灾发烟量小,且不具有毒性,大大增加了EVA材料的应用范围及使用安全性。
发明内容
本发明目的是解决现有EVA材料阻燃性能的问题,提供一种低烟无卤环保EVA/LLDPE阻燃复合材料及其制备方法,制备出的EVA/LLDPE复合材料具有良好的阻燃性能,同时具备较高的拉伸强度和断裂伸长率。
本发明的技术方案如下:
一种低烟无卤环保EVA/LLDPE阻燃复合材料,原料组分及重量份数为:
A为基础树脂:乙烯—醋酸乙烯共聚物EVA和线型低密度聚乙烯LLDPE,100份;
B为相容剂:马来酸酐接枝聚乙烯PE-g-MAH,20~30份;
C为无机阻燃剂:改性氢氧化镁80~90份,改性氢氧化铝90~100份;
D为抗氧剂:0.5~1份;
E为润滑剂:2.5~4份。
所述的基础树脂中EVA和LLDPE的重量比为5~8:1。
所述的改性氢氧化镁是改性水镁石粉,是将水镁石超细研磨后矿浆中加入KH550硅烷偶联剂(3-氨丙基三乙氧基硅烷)和JL- G02FL超分散偶联改性剂(南京金来旺塑胶技术有限公司生产),搅拌反应30~60分钟,再过滤烘干而得,其中KH550硅烷偶联剂用量为水镁石矿粉重量的 0.4%~0.8%,JL- G02FL超分散偶联改性剂用量为水镁石矿粉重量的0.8%~1.2%。采用天然水镁石粉,原料易得,资源丰富,价格低廉,先对水镁石粉进行湿法改性处理,改善其分散性和表面状况,与高分子材料的相容性增强,添加后对材料的力学性能产生的负面影响较小。
所述的改性氢氧化铝是将硅烷偶联剂ZQ-172【乙烯基-三(2-甲氧基乙氧基)硅烷】干法改性氢氧化铝,硅烷偶联剂ZQ-172用量为氢氧化铝重量的0.8%~1.2%。
所述的抗氧剂为1010,168或DLTP的一种或多种。它的作用是抑制产品老化,加强产品的耐高温性能。
所述的润滑剂为PE蜡或芥酸的一种或两种。
本发明中的低烟无卤环保EVA/LLDPE阻燃复合材料制备方法为:将EVA、LLDPE、PE-g-MAH、改性氢氧化镁、改性氢氧化铝充分混合,再加入抗氧剂、润滑剂,在塑化温度140℃~150℃,硫化温度160℃~180℃获得。
具体实施例
下面结合实施例对本发明作进一步详细说明,但它们不是对本发明的限定。
实施例1:
(1)改性氢氧化镁和改性氢氧化铝的制备
将水镁石超细研磨后矿浆中加入KH550硅烷偶联剂和JL- G02FL超分散偶联改性剂,搅拌反应60分钟,再过滤烘干而得,其中KH550硅烷偶联剂用量为水镁石矿粉重量的0.4%,JL-G02FL超分散偶联改性剂用量为水镁石矿粉重量的1.2%。
改性氢氧化铝是将硅烷偶联剂ZQ-172干法改性氢氧化铝,硅烷偶联剂A172用量为氢氧化铝重量的0.8%。
(2)原料配方
乙烯—醋酸乙烯共聚物EVA 85份
线型低密度聚乙烯LLDPE 15份;
马来酸酐接枝聚乙烯PE-g-MAH 30份;
改性氢氧化镁 80份;
改性氢氧化铝 100份;
抗氧剂1010 0.5份;
抗氧剂DLTP 0.25份;
PE蜡 2份;
芥酸 0.5份。
(3)制备方法
将EVA、LLDPE、PE-g-MAH、改性氢氧化镁、改性氢氧化铝充分混合,再加入抗氧剂1010、抗氧剂DLTP、PE蜡、芥酸,在塑化温度145℃,硫化温度160℃获得。
实施例2:
(1)改性氢氧化镁和改性氢氧化铝的制备
将水镁石超细研磨后矿浆中加入KH550硅烷偶联剂和JL- G02FL超分散偶联改性剂,搅拌反应30分钟,再过滤烘干而得,其中KH550硅烷偶联剂用量为水镁石矿粉重量的 0.8%,JL- G02FL超分散偶联改性剂用量为水镁石矿粉重量的0.9%。
改性氢氧化铝是将硅烷偶联剂ZQ-172干法改性氢氧化铝,硅烷偶联剂ZQ-172用量为氢氧化铝重量的1.2%。
(2)原料配方
乙烯—醋酸乙烯共聚物EVA 87.5份
线型低密度聚乙烯LLDPE 12.5份;
马来酸酐接枝聚乙烯PE-g-MAH 25份;
改性氢氧化镁 90份;
改性氢氧化铝 90份;
抗氧剂168 0.5份;
抗氧剂DLTP 0.5份;
PE蜡 3.0份。
(3)制备方法
将EVA、LLDPE、PE-g-MAH、改性氢氧化镁、改性氢氧化铝充分混合,再加入抗氧剂168、抗氧剂DLTP 、PE蜡,在塑化温度148℃,硫化温度168℃获得。
实施例3:
(1)改性氢氧化镁和改性氢氧化铝
改性氢氧化镁为无锡市英普立阻燃材料有限公司所制。
改性氢氧化铝是将硅烷偶联剂ZQ-172干法改性氢氧化铝,硅烷偶联剂ZQ-172用量为氢氧化铝重量的1.0%。
(2)原料配方
乙烯—醋酸乙烯共聚物EVA 88.8份
线型低密度聚乙烯LLDPE 11.2份;
马来酸酐接枝聚乙烯PE-g-MAH 20份;
改性氢氧化镁 85份;
改性氢氧化铝 95份;
抗氧剂1010 1.0份;
PE蜡 1.5份;
芥酸 2.5份。
(3)制备方法
将EVA、LLDPE、PE-g-MAH、改性氢氧化镁、改性氢氧化铝充分混合,再加入抗氧剂1010、PE蜡、芥酸,在塑化温度150℃,硫化温度175℃获得。
通过以上实施例制得的低烟无卤环保EVA/LLDPE阻燃复合材料的性能检测如下:
实施例 拉伸强度(MPa) 断裂伸长率(%) 氧指数(%)
实施例1 11.2 286 33.9
实施例2 12.4 272 33.4
实施例3 11.8 284 33.6。

Claims (3)

1.一种无机阻燃剂的制备方法,是由改性水镁石和改性氢氧化铝混合制成,其特征在于,改性水镁石是将水镁石超细研磨后矿浆中加入KH550硅烷偶联剂和JL- G02FL超分散偶联改性剂,搅拌反应30~60分钟,再过滤烘干;改性氢氧化铝是将硅烷偶联剂ZQ-172干法改性氢氧化铝。
2.根据权利要求1所述的一种无机阻燃剂的制备方法,其特征在于,所述的KH550硅烷偶联剂用量为水镁石矿粉重量的 0.4%~0.8%,JL- G02FL超分散偶联改性剂用量为水镁石矿粉重量的0.8%~1.2%。
3.根据权利要求1所述的一种无机阻燃剂的制备方法,其特征在于,所述的硅烷偶联剂ZQ-172用量为氢氧化铝重量的0.8%~1.2%。
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Application publication date: 20160810