CN112778767A - 一种耐高温沥青导热垫片及其制备方法 - Google Patents
一种耐高温沥青导热垫片及其制备方法 Download PDFInfo
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- BITPLIXHRASDQB-UHFFFAOYSA-N ethenyl-[ethenyl(dimethyl)silyl]oxy-dimethylsilane Chemical group C=C[Si](C)(C)O[Si](C)(C)C=C BITPLIXHRASDQB-UHFFFAOYSA-N 0.000 claims description 2
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- C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
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Abstract
本发明公开了一种耐高温沥青导热垫片，按重量份数计，包括如下组分：乙烯基硅油100份、低含氢硅油1‑5份、高含氢硅油1‑5份、铂金催化剂1‑3份、胶囊型铂金催化剂2‑4份、乙烯基双封头0.2‑0.4份、含氢双封头0.2‑0.5份、氢氧化铝300‑500份、氧化铝300‑500份、氧化锌5‑10份和抗氧剂10240.05‑0.07份。本发明的有益效果是：本发明通过分子设计，提供了一种耐高温沥青的导热垫片，在温度120℃‑150℃与沥青共存，老化测试1000h产品硬度、强度没有明显降低。
Description
技术领域
本发明涉及导热垫片，尤其涉及一种耐高温沥青导热垫片及其制备方法。
背景技术
导热垫片在不同的使用环境下，会表现出不同的特性。普通导热垫片与散热器接触，长期使用状态下性能稳定可靠。但是在沥青环境中，温度可能达到150℃，一些产品就会力学性能逐渐降低，像泥巴一样，严重影响产品的稳定性。
导热垫片力学性能降低与分子结构有直接关系。聚合物交联点较少，在高温沥青的影响下加速断链，而没有新的交联点形成新的化学键；另外，大分子链段上的活性基团有残留，没有完全反应，导致其在高温下仍有反应活性，加速了产品的老化进程。
发明内容
本发明针对上述问题，提供一种耐高温沥青导热垫片，按重量份数计，包括如下组分：乙烯基硅油100份、低含氢硅油1-5份、高含氢硅油1-5份、铂金催化剂1-3份、胶囊型铂金催化剂2-4份、乙烯基双封头0.2-0.4份、含氢双封头0.2-0.5份、氢氧化铝300-500份、氧化铝300-500份、氧化锌5-10份和抗氧剂10240.05-0.07份。
具体地，所述乙烯基硅油中乙烯基含量为0.1-0.5wt％，粘度1000-3000mPa·s；所述低含氢硅油活泼氢含量为0.15-0.2wt％；所述高含氢硅油活泼氢含量为0.6-1.0wt％；所述乙烯基双封头为四甲基二乙烯基二硅氧烷，乙烯基含量27.5-30.0wt％；所述含氢双封头为四甲基二氢基二硅氧烷，含氢量1.3-1.5wt％。
本发明的有益效果是：本发明通过分子设计，提供了一种耐高温沥青导热垫片，在温度120℃-150℃与沥青共存，老化测试1000h产品硬度、强度没有明显降低。
本发明耐高温沥青导热垫片的制备方法为：按重量份称取各组分，将乙烯基硅油、低含氢硅油、高含氢硅油和铂金催化剂加入到搅拌釜中搅拌0.5h，转速为30-35rpm，加入氧化铝搅拌0.5h，转速为15-20rpm，加入氧化锌，搅拌0.5h，转速为15-20rpm，加入氢氧化铝，搅拌0.5h，转速为15-20rpm，升温到60℃，加入乙烯基双封头，反应10min后抽真空除去未反应的乙烯基双封头，加入含氢双封头，反应10min后抽真空除去未反应的含氢双封头，加入胶囊型铂金催化剂和抗氧剂1024，搅拌0.5h，转速为15-20rpm，将混合物压成2mm厚的片材在125℃硫化0.5h，即得。
具体实施方式
以下结合实例对本发明进行描述，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
一种耐高温沥青导热垫片的制备方法：将乙烯基硅油100份、低含氢硅油1份、高含氢硅油1份，催化剂1份加入到搅拌釜中搅拌0.5h，转速为30-35rpm，加入氧化铝300份搅拌0.5h，转速为15-20rpm，加入氧化锌5份，搅拌0.5h，转速为15-20rpm，加入氢氧化铝300份，搅拌0.5h，转速为15-20rpm，升温到60℃，加入乙烯基双封头0.2份，反应10min后抽真空除去未反应的乙烯基双封头，加入含氢双封头0.2份，反应10min后抽真空除去未反应的含氢双封头，加入胶囊型铂金催化剂2份和抗氧剂0.05份，搅拌0.5h，转速为15-20rpm，将混合物压成2mm厚的片材在125℃硫化0.5h，即得。
实施例2
一种耐高温沥青导热垫片的制备方法：将乙烯基硅油100份、低含氢硅油5份、高含氢硅油5份，催化剂3份加入到搅拌釜中搅拌0.5h，转速为30-35rpm，加入氧化铝500份搅拌0.5h，转速为15-20rpm，加入氧化锌10份，搅拌0.5h，转速为15-20rpm，加入氢氧化铝500份，搅拌0.5h，转速为15-20rpm，升温到60℃，加入乙烯基双封头0.4份，反应10min后抽真空除去未反应的乙烯基双封头，加入含氢双封头0.5份，反应10min后抽真空除去未反应的含氢双封头，加入胶囊型铂金催化剂4份和抗氧剂0.07份，搅拌0.5h，转速为15-20rpm，将混合物压成2mm厚的片材在125℃硫化0.5h，即得。
实施例3
一种耐高温沥青导热垫片的制备方法：将乙烯基硅油100份、低含氢硅油3份、高含氢硅油2份，催化剂2份加入到搅拌釜中搅拌0.5h，转速为30-35rpm，加入氧化铝400份搅拌0.5h，转速为15-20rpm，加入氧化锌8份，搅拌0.5h，转速为15-20rpm，加入氢氧化铝400份，搅拌0.5h，转速为15-20rpm，升温到60℃，加入乙烯基双封头0.3份，反应10min后抽真空除去未反应的乙烯基双封头，加入含氢双封头0.3份，反应10min后抽真空除去未反应的含氢双封头，加入胶囊型铂金催化剂3份和抗氧剂0.06份，搅拌0.5h，转速为15-20rpm，将混合物压成2mm厚的片材在125℃硫化0.5h，即得。
将实施例1-3所得耐高温沥青导热垫片与普通垫片进行相关性能检测，结果如表1所示。
表1
由表1可知，本发明所得耐高温沥青垫片，硬度降低13％左右，拉伸强度降低10％左右，而普通垫片硬度降低100％，拉伸强度降低了80％。
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 (7)
1.一种耐高温沥青导热垫片，其特征在于，按重量份数计，包括如下组分：乙烯基硅油100份、低含氢硅油1-5份、高含氢硅油1-5份、铂金催化剂1-3份、胶囊型铂金催化剂2-4份、乙烯基双封头0.2-0.4份、含氢双封头0.2-0.5份、氢氧化铝300-500份、氧化铝300-500份、氧化锌5-10份和抗氧剂10240.05-0.07份。
2.根据权利要求1所述的耐高温沥青导热垫片，其特征在于，所述乙烯基硅油中乙烯基含量为0.1-0.5wt％，粘度1000-3000mPa·s。
3.根据权利要求1所述的耐高温沥青导热垫片，其特征在于，所述低含氢硅油活泼氢含量为0.15-0.2wt％。
4.根据权利要求1所述的耐高温沥青导热垫片，其特征在于，所述高含氢硅油活泼氢含量为0.6-1.0wt％。
5.根据权利要求1所述的耐高温沥青导热垫片，其特征在于，所述乙烯基双封头为四甲基二乙烯基二硅氧烷，乙烯基含量27.5-30.0wt％。
6.根据权利要求1所述的耐高温沥青导热垫片，其特征在于，所述含氢双封头为四甲基二氢基二硅氧烷，含氢量1.3-1.5wt％。
7.一种如权利要求1-6任一项所述的制备方法，其特征在于，其步骤为：按重量份称取各组分，将乙烯基硅油、低含氢硅油、高含氢硅油和铂金催化剂加入到搅拌釜中搅拌0.5h，转速为30-35rpm，加入氧化铝搅拌0.5h，转速为15-20rpm，加入氧化锌，搅拌0.5h，转速为15-20rpm，加入氢氧化铝，搅拌0.5h，转速为15-20rpm，升温到60℃，加入乙烯基双封头，反应10min后抽真空除去未反应乙烯基双封头，加入含氢双封头，反应10min后抽真空除去未反应的含氢双封头，加入胶囊型铂金催化剂和抗氧剂1024，搅拌0.5h，转速为15-20rpm，将混合物压成2mm厚的片材，125℃硫化0.5h，即得。
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