CN103739825A - 一种新型电磁屏蔽硬质聚氨酯泡沫塑料的制备方法 - Google Patents

一种新型电磁屏蔽硬质聚氨酯泡沫塑料的制备方法 Download PDF

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CN103739825A
CN103739825A CN201310703437.7A CN201310703437A CN103739825A CN 103739825 A CN103739825 A CN 103739825A CN 201310703437 A CN201310703437 A CN 201310703437A CN 103739825 A CN103739825 A CN 103739825A
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李荣华
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SUZHOU CITY WANTAI VACUUM FUENACE CO Ltd
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Abstract

本发明公开了一种新型电磁屏蔽硬质聚氨酯泡沫塑料的制备方法，a、在反应釜中加入聚乙二醇PEG-2000，1，4-丁二醇，对甲苯磺酸，松香，二乙醇胺，搅拌下加热60~120℃，釜中充满氮气或惰性气体，反应1~4小时；b、向步骤a得到的溶液中加入三聚氰胺，辛基锡，继续反应0.5~2小时，减压蒸馏，回收水及低组份物质后，得到一种松香多元醇混合物；c、称取松香多元醇，聚4,4’-二苯甲烷二异氰酸酯MDI，三乙胺、聚异佛尔酮二异氰酸酯PIDI、有机硅油，电气石，水，高速搅拌混匀；d、待大量泡体出现时立即注入模具中，于40~60℃下熟化60~180分钟，脱模，即得具有电磁屏蔽功能的聚氨酯硬泡塑料制品。

Description

一种新型电磁屏蔽硬质聚氨酯泡沫塑料的制备方法
技术领域
本发明属于聚氨酯泡沫塑料领域，特别涉及一种新型电磁屏蔽硬质聚氨酯泡沫塑料的制备方法。
背景技术
聚氨酯是由多异氰酸酯与多元醇反应生成的以氨基甲酸酯基为重复单元的高分子化合物。聚氨酯树脂具有软硬度可调、耐磨、耐溶剂、耐低温及与大多数材料有较强粘接性等特点，近年来发展迅速。在过去的几十年中硬质聚氨酯泡沫量在全世界快速稳步增长，据有关资料报道，聚氨酯硬泡(RPUF)具有优良的物理机械性能、电学性能、声学性能及耐化学腐蚀性能，并与多种材料具有很强的粘结力，聚氨酯硬泡主要用于冷藏、建筑保温、汽车等行业，近年来，国内由于建筑墙体、层面保温、热力管道、油田运输管道、冰箱和冰柜保温，家具、门窗板材等领域大量应用，聚氨酯硬泡增速较快，过去5年内，年均需求增速超过25%，2007年国内聚氨酯硬泡产量达到90万吨左右。未来随着建筑保温节能市场的不断拓展，聚氨酯硬泡需求有望迎来爆发式增长，硬泡领域为聚氨酯行业未来最大的需求亮点。随着无线通讯工具，广播电视业的高速发展，办公电脑自动化的全面推广，家用电器的迅速普及，电磁辐射可谓无处不在，无孔不入，成为一种新型的环境污染。电磁辐射对胎儿，幼儿的影响最大，长期暴露于电磁辐射之下，可诱发癌症，白血病等，成为许多疾病的诱因。 功能性防辐射硬质聚氨酯泡沫塑料有着广泛的市场前景。
众所周知，电气石由于本身的独特晶体结构——硅氧四面体角顶都指向同一个方向，因此具有极性，电气石通过正负电极之间形成的静电场作用，电解空气中的水分，形成负离子，以中和辐射物发出的阳离子，从而减少或减弱对人体有害的电磁辐射。据报道，将具有高导电率和高磁导率的填料如碳系、金属系、金属氧化物、低熔点合金、以及具有屏蔽性能的矿物材料添加到聚合物集体中，制成具有较好电磁屏蔽效果的聚合物基复合材料，通常的屏蔽体的有效性用屏蔽效能SE一般在40~60 dB ，能达到80dB的及少，且成本很高。
发明内容：
本发明的目的是针对现有技术中的不足，提供一种屏蔽效能高，成本低的新型电磁屏蔽硬质聚氨酯泡沫塑料的制备方法。
技术方案：为实现上述发明目的，一种新型电磁屏蔽硬质聚氨酯泡沫塑料的制备方法，包括以下技术步骤：
a、在反应釜中加入聚乙二醇PEG-2000，1，4-丁二醇，对甲苯磺酸，松香，二乙醇胺，搅拌下加热60~120℃，釜中充满氮气或惰性气体，反应1~4小时；
b、向步骤a得到的溶液中加入三聚氰胺，辛基锡， 继续反应0.5~2小时，减压蒸馏，回收水及低组份物质后，得到一种松香多元醇混合物；
c、称取松香多元醇，聚4,4’-二苯甲烷二异氰酸酯MDI，三乙胺、聚异佛尔酮二异氰酸酯PIDI、有机硅油，电气石，水，高速搅拌混匀；
d、待大量泡体出现时立即注入模具中，于40~60℃下熟化60~180分钟，脱模，即得具有电磁屏蔽功能的聚氨酯硬泡塑料制品。
所述MDI与松香多元醇的质量比为1.0~2.0:1。
所述MDI与IPDI的质量比为1.0~5.0:1
所述羟基硅油为聚醚改性有机硅油SF-8427。
所述电气石为锂电气石。
所述MDI与电气石的质量比为1.0~10.0:1。
根据以上技术方案，可以实现以下的有益效果：本发明所获得型电磁屏蔽硬质聚氨酯泡沫塑料，屏蔽效能高达100dB，原料易得，成本低,适宜于工业化生产。
具体实施方式：
    下面结合实施例对本发明做进一步地详细说明，但是本发明要求保护的范围并不局限于实施例表示的范围。
实施例1：
在反应釜中加入聚乙二醇PEG-2000(400.0kg)，1，4-丁二醇（100.0kg），对甲苯磺酸(5.3kg)，松香(150.0kg)，二乙醇胺(18.5kg)，搅拌下加热100℃，釜中充满氮气或惰性气体，反应2小时；向得到的产物中加入三聚氰胺(55.0kg)，辛基锡(1.05kg)， 继续反应2小时，减压蒸馏，回收水及低组份物质后，得到一种松香多元醇混合物；
称取松香多元醇(300.0kg)，聚4,4’-二苯甲烷二异氰酸酯MDI(320.0kg)，三乙胺(13.8kg)、聚异佛尔酮二异氰酸酯PIDI(100.0kg)，有机硅油SF-8427(158.7kg)，电气石(60.5kg)，水(3.0kg)，高速搅拌混匀；待大量泡体出现时立即注入模具中，于60℃下熟化80分钟，脱模，即得聚氨酯硬泡塑料制品。
实施例2：
在反应釜中加入聚乙二醇PEG-2000(350.0kg)，1，4-丁二醇（100.0kg），对甲苯磺酸(5.3kg)，松香(150.0kg)，二乙醇胺(18.5kg)，搅拌下加热100℃，釜中充满氮气或惰性气体，反应2小时；向得到的产物中加入三聚氰胺(45.0kg)，辛基锡(1.05kg)， 继续反应2小时，减压蒸馏，回收水及低组份物质后，得到一种松香多元醇混合物；
称取松香多元醇(300.0kg)，聚4,4’-二苯甲烷二异氰酸酯MDI(400.0kg)，三乙胺(13.8kg)、聚异佛尔酮二异氰酸酯PIDI(150.0kg)，有机硅油SF-8427(200.5kg)，电气石(70.5kg)，水(3.0kg)，高速搅拌混匀；待大量泡体出现时立即注入模具中，于60℃下熟化80分钟，脱模，即得聚氨酯硬泡塑料制品。
实施例3：
在反应釜中加入聚乙二醇PEG-2000(400.0kg)，1，4-丁二醇（100.0kg），对甲苯磺酸(5.3kg)，松香(180.0kg)，二乙醇胺(18.5kg)，搅拌下加热100℃，釜中充满氮气或惰性气体，反应2小时；向得到的产物中加入三聚氰胺(45.0kg)，辛基锡(1.05kg)， 继续反应2小时，减压蒸馏，回收水及低组份物质后，得到一种松香多元醇混合物；
称取松香多元醇(300.0kg)，聚4,4’-二苯甲烷二异氰酸酯MDI(450.0kg)，三乙胺(13.8kg)、聚异佛尔酮二异氰酸酯PIDI(100.0kg)，有机硅油SF-8427(158.7kg)，电气石(80.5kg)，水(3.0kg)，高速搅拌混匀；待大量泡体出现时立即注入模具中，于60℃下熟化80分钟，脱模，即得聚氨酯硬泡塑料制品。

Claims (6)

1. 一种新型电磁屏蔽硬质聚氨酯泡沫塑料的制备方法，其特征在于，包括以下技术步骤：
a、在反应釜中加入聚乙二醇PEG-2000，1，4-丁二醇，对甲苯磺酸，松香，二乙醇胺，搅拌下加热60~120℃，釜中充满氮气或惰性气体，反应1~4小时；
b、向步骤a得到的溶液中加入三聚氰胺，辛基锡， 继续反应0.5~2小时，减压蒸馏，回收水及低组份物质后，得到一种松香多元醇混合物；
c、称取松香多元醇，聚4,4’-二苯甲烷二异氰酸酯MDI，三乙胺、聚异佛尔酮二异氰酸酯PIDI、有机硅油，电气石，水，高速搅拌混匀；
d、待大量泡体出现时立即注入模具中，于40~60℃下熟化60~180分钟，脱模，即得具有电磁屏蔽功能的聚氨酯硬泡塑料制品。
2.如权利要求1所述的一种新型电磁屏蔽硬质聚氨酯泡沫塑料的制备方法，其特征在于：MDI与松香多元醇的质量比为1.0~2.0:1。
3.如权利要求1所述的一种新型电磁屏蔽硬质聚氨酯泡沫塑料的制备方法，其特征在于：MDI与IPDI的质量比为1.0~5.0:1。
4.如权利要求1所述的一种新型电磁屏蔽硬质聚氨酯泡沫塑料的制备方法，其特征在于：羟基硅油为聚醚改性有机硅油SF-8427。
5.如权利要求1所述的一种新型电磁屏蔽硬质聚氨酯泡沫塑料的制备方法，其特征在于：电气石为锂电气石。
6.如权利要求1所述的一种新型电磁屏蔽硬质聚氨酯泡沫塑料的制备方法，其特征在于：MDI与电气石的质量比为1.0~10.0:1。
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