CN107964245A - 一种点胶式凝胶导热垫片及其制备方法 - Google Patents

一种点胶式凝胶导热垫片及其制备方法 Download PDF

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CN107964245A
CN107964245A CN201711364363.3A CN201711364363A CN107964245A CN 107964245 A CN107964245 A CN 107964245A CN 201711364363 A CN201711364363 A CN 201711364363A CN 107964245 A CN107964245 A CN 107964245A
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王红玉
万炜涛
陈田安
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SHENZHEN DARBOND INTERFACE MATERIALS CO Ltd
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Abstract

本发明属于导热垫片料技术领域,尤其涉及一种点胶式凝胶导热垫片及其制备方法。本发明的点胶式凝胶导热垫片由双组份膏状物点胶,点胶后硫化成固体垫片,原材料几乎没有浪费,且增加了产品的多样性。由于点胶出来是液体膏状物,施工产生的应力非常小,有利于保护电路其他元件,几乎没有装配公差,适用于不同热源高度等复杂设计。

Description

一种点胶式凝胶导热垫片及其制备方法
技术领域
本发明属于导热垫片料技术领域,尤其涉及一种点胶式凝胶导热垫片及其制备方法。
背景技术
普通导热垫片在使用过程中一般都有一定的装配压力,组件会有不同程度受力;在装配过程中还要有一定的装配公差,不利于结构精密设计;在电路中不同热源高度不同,普通导热垫片很难适用于一些较复杂的散热设计。另外,普通导热垫片需要裁切成一定的厚度和形状,原料浪费较大。
发明内容
本发明针对上述现有技术存在的不足,提供一种点胶式凝胶导热垫片及其制备方法。
本发明解决上述技术问题的技术方案如下:一种点胶式凝胶导热垫片,A组分和B组分按照重量比1:1混合;
其中,A组分按照重量份数包括甲基硅油30份、乙烯基硅油10-15份、润湿剂5-8份、催化剂0.5-1份、红色颜料0.3-0.5份、氧化铝300-500份和氢氧化铝200-400份;
B组分按照重量份数包括二甲基硅油50份、含氢硅油1.0-5.0份、抑制剂0.5-0.8份、黑色颜料0.3-0.5份、氧化铝300-500份、氮化铝100-200份、氧化锌100-200份和白炭黑2.5-4.5份。
进一步,A组分中,所述的甲基硅油粘度为400-600mPa·s;
所述的乙烯基硅油为乙烯基含量0.3-0.35wt%、粘度为400-500mPa·s;
所述的润湿剂为3-氨丙基三乙氧基硅烷;
所述的催化剂为铂金催化剂;
所述的氧化铝粒径为5-20μm;
所述的氢氧化铝粒径为25-35μm。
进一步,B组分中,所述的二甲基硅油粘度为200-400mPa·s;
所述的含氢硅油为活泼氢含量0.1-0.3wt%、粘度为50-80mPa·s;
所述的抑制剂为炔醇抑制剂;
所述的氧化铝粒径为10-20μm;
所述的氮化铝粒径为20-30μm;
所述的氧化锌粒径为5-10μm。
进一步,所述的红色颜料为铁红;所述的黑色颜料为炭黑。
本发明的第二个目的在于提供上述点胶式凝胶导热垫片的制备方法,步骤如下:
(1)制备A组分
将甲基硅油30份、乙烯基硅油10-15份、润湿剂5-8份和红色颜料0.3-0.5份加入到搅拌釜中,搅拌0.5h,转速为80-100rpm,然后加入氧化铝300-500份搅拌0.5h,转速为20-50rpm;再加入氢氧化铝200-400份搅拌0.5h,转速为20-50rpm;最后加入催化剂0.5-1份搅拌0.5h,转速为20-60rpm,抽真空脱去气泡,得到混合均匀的红色A组分;
(2)制备B组分
将二甲基硅油50份、含氢硅油1.0-5.0份、抑制剂0.5-0.8份和黑色颜料0.3-0.5份加入到搅拌釜中,搅拌0.5h,转速为80-100rpm,然后加入氧化铝300-500份搅拌0.5h,转速为20-50rpm;再加入氮化铝100-200份和氧化锌100-200份搅拌0.5h,转速为20-50rpm;最后加入白炭黑2.5-4.5份搅拌0.5h,转速为20-60rpm,抽真空脱去气泡,得到混合均匀的黑色B组分;
(3)将A组分和B组分按照重量比1:1混合点胶,20-25℃条件下硫化24h,即得凝胶导热垫片。
本发明的特点和有益效果在于:
本发明的点胶式凝胶导热垫片由双组份膏状物点胶,点胶后硫化成固体垫片,原材料几乎没有浪费,且增加了产品的多样性。由于点胶出来是液体膏状物,施工产生的应力非常小,有利于保护电路其他元件,几乎没有装配公差,适用于不同热源高度等复杂设计。
具体实施方式
以下结合实例对本发明的原理和特征进行描述,所举实例只用于解释本发明,并非用于限定本发明的范围。
实施例1
一种点胶式凝胶导热垫片的制备方法,步骤如下:
(1)制备A组分
将甲基硅油30g、乙烯基硅油10g、润湿剂5g和红色颜料0.3g加入到搅拌釜中,搅拌0.5h,转速为80rpm,然后加入氧化铝30g搅拌0.5h,转速为20rpm;再加入氢氧化铝200g搅拌0.5h,转速为20rpm;最后加入催化剂0.5g搅拌0.5h,转速为20rpm,抽真空脱去气泡,得到混合均匀的红色A组分;
(2)制备B组分
将二甲基硅油50g、含氢硅油1.0g、抑制剂0.5g和黑色颜料0.3g加入到搅拌釜中,搅拌0.5h,转速为80rpm,然后加入氧化铝300g搅拌0.5h,转速为20rpm;再加入氮化铝100g和氧化锌100g搅拌0.5h,转速为20rpm;最后加入白炭黑2.5g搅拌0.5h,转速为20rpm,抽真空脱去气泡,得到混合均匀的黑色B组分;
(3)将A组分和B组分按照重量比1:1混合点胶,20-25℃条件下硫化24h,即得凝胶导热垫片。
实施例2
一种点胶式凝胶导热垫片的制备方法,步骤如下:
(1)制备A组分
将甲基硅油30g、乙烯基硅油15g、润湿剂8g和红色颜料0.5g加入到搅拌釜中,搅拌0.5h,转速为90rpm,然后加入氧化铝500g搅拌0.5h,转速为30rpm;再加入氢氧化铝400g搅拌0.5h,转速为40rpm;最后加入催化剂1.0g搅拌0.5h,转速为50rpm,抽真空脱去气泡,得到混合均匀的红色A组分;
(2)制备B组分
将二甲基硅油50g、含氢硅油5.0g、抑制剂0.8g和黑色颜料0.5g加入到搅拌釜中,搅拌0.5h,转速为90rpm,然后加入氧化铝500g搅拌0.5h,转速为30rpm;再加入氮化铝200g和氧化锌200g搅拌0.5h,转速为40rpm;最后加入白炭黑4.5g搅拌0.5h,转速为50rpm,抽真空脱去气泡,得到混合均匀的黑色B组分;
(3)将A组分和B组分按照重量比1:1混合点胶,20-25℃条件下硫化24h,即得凝胶导热垫片。
实施例3
一种点胶式凝胶导热垫片的制备方法,步骤如下:
(1)制备A组分
将甲基硅油30g、乙烯基硅油13g、润湿剂6g和红色颜料0.4g加入到搅拌釜中,搅拌0.5h,转速为100rpm,然后加入氧化铝400g搅拌0.5h,转速为50rpm;再加入氢氧化铝250g搅拌0.5h,转速为50rpm;最后加入催化剂0.8g搅拌0.5h,转速为60rpm,抽真空脱去气泡,得到混合均匀的红色A组分;
(2)制备B组分
将二甲基硅油50g、含氢硅油3.0g、抑制剂0.6g和黑色颜料0.5g加入到搅拌釜中,搅拌0.5h,转速为100rpm,然后加入氧化铝400g搅拌0.5h,转速为50rpm;再加入氮化铝150g和氧化锌130g搅拌0.5h,转速为50rpm;最后加入白炭黑3.0g搅拌0.5h,转速为60rpm,抽真空脱去气泡,得到混合均匀的黑色B组分;
(3)将A组分和B组分按照重量比1:1混合点胶,20-25℃条件下硫化24h,即得凝胶导热垫片。
以上所述仅为本发明的较佳实施例,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (5)

1.一种点胶式凝胶导热垫片,其特征在于,A组分和B组分按照重量比1:1混合;
其中,A组分按照重量份数包括甲基硅油30份、乙烯基硅油10-15份、润湿剂5-8份、催化剂0.5-1份、红色颜料.3-0.5份、氧化铝300-500份和氢氧化铝200-400份;
B组分按照重量份数包括二甲基硅油50份、含氢硅油1.0-5.0份、抑制剂0.5-0.8份、黑色颜料.3-0.5份、氧化铝300-500份、氮化铝100-200份、氧化锌100-200份和白炭黑2.5-4.5份。
2.根据权利要求1所述的点胶式凝胶导热垫片,其特征在于,A组分中,所述的甲基硅油粘度为400-600mPa·s;
所述的乙烯基硅油为乙烯基含量0.3-0.35wt%、粘度为400-500mPa·s;
所述的润湿剂为3-氨丙基三乙氧基硅烷;
所述的催化剂为铂金催化剂;
所述的氧化铝粒径为5-20μm;
所述的氢氧化铝粒径为25-35μm。
3.根据权利要求1所述的点胶式凝胶导热垫片,其特征在于,B组分中,所述的二甲基硅油粘度为200-400mPa·s;
所述的含氢硅油为活泼氢含量0.1-0.3wt%、粘度为50-80mPa·s;
所述的抑制剂为炔醇抑制剂;
所述的氧化铝粒径为10-20μm;
所述的氮化铝粒径为20-30μm;
所述的氧化锌粒径为5-10μm。
4.根据权利要求1所述的点胶式凝胶导热垫片,其特征在于,所述的红色颜料为铁红;所述的黑色颜料为炭黑。
5.一种权利要求1-4任一项所述点胶式凝胶导热垫片的制备方法,其特征在于,步骤如下:
(1)制备A组分
将甲基硅油30份、乙烯基硅油10-15份、润湿剂5-8份和红色颜料0.3-0.5份加入到搅拌釜中,搅拌0.5h,转速为80-100rpm,然后加入氧化铝300-500份搅拌0.5h,转速为20-50rpm;再加入氢氧化铝200-400份搅拌0.5h,转速为20-50rpm;最后加入催化剂0.5-1份搅拌0.5h,转速为20-60rpm,抽真空脱去气泡,得到混合均匀的红色A组分;
(2)制备B组分
将二甲基硅油50份、含氢硅油1.0-5.0份、抑制剂0.5-0.8份和黑色颜料0.3-0.5份加入到搅拌釜中,搅拌0.5h,转速为80-100rpm,然后加入氧化铝300-500份搅拌0.5h,转速为20-50rpm;再加入氮化铝100-200份和氧化锌100-200份搅拌0.5h,转速为20-50rpm;最后加入白炭黑2.5-4.5份搅拌0.5h,转速为20-60rpm,抽真空脱去气泡,得到混合均匀的黑色B组分;
(3)将A组分和B组分按照重量比1:1混合点胶,20-25℃条件下硫化24h,即得凝胶导热垫片。
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GB2618768A (en) * 2022-04-28 2023-11-22 H K Wentworth Ltd Two-component gap filler composition

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