CN107964244A - 一种玻纤增强型导热垫片的制备方法 - Google Patents
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Abstract
本发明属于导热垫片料技术领域,尤其涉及一种玻纤增强型导热垫片的制备方法。本发明提供一种复合材料的制备方法,导热垫片的含氢硅油过量,玻纤布由乙烯基硅油处理,因此玻纤布和上下层的导热垫片能够很好的反应成为一个整体,根据客户需求,把玻纤添加到导热垫片的任意指定位置,从而成功制得中间带玻纤的增强型导热垫片。该导热垫片可用于填充电子工业的散热器缝隙,提高电子元件的寿命与稳定性,可在‑50~200℃长期使用,安全环保,使用方便。
Description
技术领域
本发明属于导热垫片料技术领域,尤其涉及一种玻纤增强型导热垫片的制备方法。
背景技术
导热垫片的导热能力主要靠添加导热填料来实现,在一般情况下,导热系数越高,需要添加导热填料的量越大,这就造成高导热率的导热垫片本体强度较低,需要增强材料来提高强度。玻璃纤维布就是用来提高导热垫片的一种增强材料,在产品制备过程中一般粘接在产品表面,而有特殊客户则要求玻纤在导热垫片的指定位置,比如中间或者上面1/3处,从技术上需要提供一种客户指定任意位置的玻纤增强型导热垫片。
发明内容
本发明针对上述现有技术存在的不足,提供一种玻纤增强型导热垫片的制备方法。
本发明解决上述技术问题的技术方案如下:一种玻纤增强型导热垫片的制备方法,步骤如下:
(1)玻纤布处理
将玻纤布经处理剂浸泡后,在120℃条件下烘烤1h;
所述的处理剂包括15wt%偶联剂和85wt%乙烯基硅油;
(2)制备底层导热垫片
按重量份数,将甲基硅油100份、乙烯基硅油20-40份和含氢硅油10-15份加入到搅拌釜中搅拌0.5h,转速为50-70rpm;加入氧化铝500-600份和氢氧化铝300-500份,搅拌1h,转速为20-50rpm;抽真空脱去气泡,得到导热膏状料;将1/4-1/2重量份膏状料压制,在130℃条件下硫化0.5h得到底层导热垫片,剩余1/2-3/4重量份膏状料备用;
(3)制备玻纤增强型导热垫片
将步骤(1)处理后的玻纤布平铺在步骤(2)的底层导热垫片上,将步骤(2)剩余的膏状料压在玻纤布上,平铺10-15mi n后,压制,在125℃条件下硫化1h,得到玻纤增强型导热垫片。
进一步,步骤(1)中,所述偶联剂为γ-(甲基丙烯酰氧)丙基三甲氧基硅烷;
所述乙烯基硅油为乙烯基含量0.2-0.3wt%,粘度为400-600mPa·s。
进一步,步骤(2)中,所述甲基硅油粘度为150-250mPa·s;
所述乙烯基硅油为乙烯基含量0.1-0.2wt%,粘度为800-1000mPa·s;
所述含氢硅油为活泼氢含量0.4-0.5wt%,粘度为100-200mPa·s;
所述氧化铝粒径为5-25μm;
所述氢氧化铝粒径为20-35μm。
本发明的特点和有益效果在于:
本发明提供一种复合材料的制备方法,导热垫片的含氢硅油过量,玻纤布由乙烯基硅油处理,因此玻纤布和上下层的导热垫片能够很好的反应成为一个整体,根据客户需求,把玻纤添加到导热垫片的任意指定位置,从而成功制得中间带玻纤的增强型导热垫片。该导热垫片可用于填充电子工业的散热器缝隙,提高电子元件的寿命与稳定性,可在-50~200℃长期使用,安全环保,使用方便。
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3mm的玻纤增强型导热垫片的制备方法,步骤如下:
(1)玻纤布处理
将玻纤布经处理剂浸泡后,在120℃条件下烘烤1h;
所述的处理剂包括15wt%偶联剂γ-(甲基丙烯酰氧)丙基三甲氧基硅烷和85wt%乙烯基硅油;
(2)制备底层导热垫片
按重量份数,将甲基硅油100份、乙烯基硅油20份和含氢硅油15份加入到搅拌釜中搅拌0.5h,转速为50rpm;加入氧化铝500份和氢氧化铝300份,搅拌1h,转速为20rpm;抽真空脱去气泡,得到导热膏状料;将1/3重量份膏状料压制成厚度为1mm,在130℃条件下硫化0.5h得到底层导热垫片,剩余2/3重量份膏状料备用;
(3)制备玻纤增强型导热垫片
将步骤(1)处理后的玻纤布平铺在步骤(2)的底层导热垫片上,将步骤(2)剩余的2/3重量份膏状料压在玻纤布上,平铺10-15mi n后,压制成厚度为2mm在125℃条件下硫化1h,得到玻纤增强型导热垫片。
实施例2
一种4mm玻纤增强型导热垫片的制备方法,步骤如下:
(1)玻纤布处理
将玻纤布经处理剂浸泡后,在120℃条件下烘烤1h;
所述的处理剂包括15wt%偶联剂γ-(甲基丙烯酰氧)丙基三甲氧基硅烷和85wt%乙烯基硅油;
(2)制备底层导热垫片
按重量份数,将甲基硅油100份、乙烯基硅油30份和含氢硅油10份加入到搅拌釜中搅拌0.5h,转速为70rpm;加入氧化铝600份和氢氧化铝400份,搅拌1h,转速为30rpm;抽真空脱去气泡,得到导热膏状料;将1/4重量份膏状料压制成厚度1mm,在130℃条件下硫化0.5h得到底层导热垫片,剩余3/4重量份膏状料备用;
(3)制备玻纤增强型导热垫片
将步骤(1)处理后的玻纤布平铺在步骤(2)的底层导热垫片上,将步骤(2)剩余的3/4重量份膏状料压在玻纤布上,平铺10-15mi n后,压制成厚度为3mm,在125℃条件下硫化1h,得到玻纤增强型导热垫片。
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 (3)
1.一种玻纤增强型导热垫片的制备方法,其特征在于,步骤如下:
(1)玻纤布处理
将玻纤布经处理剂浸泡后,在120℃条件下烘烤1h;
所述的处理剂包括15wt%偶联剂和85wt%乙烯基硅油;
(2)制备底层导热垫片
按重量份数,将甲基硅油100份、乙烯基硅油20-40份和含氢硅油10-15份加入到搅拌釜中搅拌0.5h,转速为50-70rpm;加入氧化铝500-600份和氢氧化铝300-500份,搅拌1h,转速为20-50rpm;抽真空脱去气泡,得到导热膏状料;将1/4-1/2重量份膏状料压制,在130℃条件下硫化0.5h得到底层导热垫片,剩余1/2-3/4重量份膏状料备用;
(3)制备玻纤增强型导热垫片
将步骤(1)处理后的玻纤布平铺在步骤(2)的底层导热垫片上,将步骤(2)剩余的膏状料压在玻纤布上,平铺10-15min后,压制,在125℃条件下硫化1h,得到玻纤增强型导热垫片。
2.根据权利要求1所述的制备方法,其特征在于,步骤(1)中,所述偶联剂为γ-(甲基丙烯酰氧)丙基三甲氧基硅烷;
所述乙烯基硅油为乙烯基含量0.2-0.3wt%,粘度为400-600mPa·s。
3.根据权利要求1所述的制备方法,其特征在于,步骤(2)中,所述甲基硅油粘度为150-250mPa·s;
所述乙烯基硅油为乙烯基含量0.1-0.2wt%,粘度为800-1000mPa·s;
所述含氢硅油为活泼氢含量0.4-0.5wt%,粘度为100-200mPa·s;
所述氧化铝粒径为5-25μm;
所述氢氧化铝粒径为20-35μm。
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