TWI597325B - A ceramifying silicone resin composition and prepreg and laminate using the same - Google Patents
A ceramifying silicone resin composition and prepreg and laminate using the same Download PDFInfo
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Description
本發明涉及一種陶瓷化矽樹脂組合物及使用其之預浸料、層壓板與印製電路板,具有無鹵、低煙、低毒、自熄和環保等優點,在高耐熱、耐火及航空航天技術等領域前景十分廣闊,為層壓板及覆銅板在阻燃和耐火領域提供了新思路和新方法。
目前為了賦予層壓板阻燃性,使用併用溴系阻燃劑的配方。但由於近年來對環境問題越來越重視,渴求不使用鹵素化合物的樹脂組合物,從而進一步進行著代替鹵素阻燃劑的磷化合物研究,而磷化合物在燃燒時也可能產生膦等有毒化合物,因此開發不含鹵素不含磷化合物,且具有非常好的阻燃性的層壓板迫在眉睫。
普通FR-4層壓板及覆銅板雖然在火中燃燒具有難燃性和自熄性,但持續高溫燃燒後,燒餘物沒有機械強度,變成灰燼,也不能保持製品的完整性,甚至會造成更危險的二次災害,造成短路,無法應用於高耐火、高耐熱領域。
而陶瓷化矽樹脂層壓板在常溫下顯示普通矽樹脂的優良性能,然而在高溫時卻能轉變為複雜的陶瓷化結構而具有陶瓷特性,成為堅
硬的自支撐陶瓷化產物,具有一定的強度且能承受一定的衝擊力,在1000℃以上明火的燒蝕下也能保持層壓板的完整性,從而隔絕內部材料與外界高溫發生反應,能起到較好的防火與阻燃作用,在火災過程中仍然可以保證電力與通訊的暢通。
矽樹脂在高溫下燃燒時,生成二氧化矽,呈粉末狀。而添加矽酸鹽類耐火填料(雲母、矽灰石、高嶺土等)後,矽樹脂分解產生的二氧化矽與耐火填料發生反應,在填料的邊緣處形成“低共熔混合物”,從而在二氧化矽粒子和填料粒子之間起橋接作用,在著火溫度下使之固化,冷卻時形成凝聚的陶瓷化產物。這種陶瓷體具有自支撐性,能夠承受一定的機械衝擊和振動,可為作熱防護材料、耐熱透波和吸波一體化材料或其他有高溫要求的功能性層壓板。
陶瓷化矽樹脂層壓板具有優良的電性能、抗熱衝擊性好、無鹵、低煙、低毒、自熄、環保等優點,在阻燃和耐火領域提供了新思路和新方法,加快了層壓板被動防火技術的研究進展,在防火、耐火領域前景十分廣闊。
鑒於此,本發明的目的在於提供一種無鹵、無磷、阻燃自熄和高耐熱的陶瓷化矽樹脂組合物、預浸料及層壓板。該層壓板在持續燃燒後能形成堅硬的自支撐陶瓷化產物,具有一定的強度且能承受一定的衝擊力,在火災過程中仍然可以保證電力與通訊的暢通。
為了達到上述目的,本發明採用了如下技術手段:一種陶瓷化矽樹脂組合物,所述陶瓷化矽樹脂組合物按重量份數包括:縮合型矽樹脂 50~100份;催化劑 0.0001~2份;成瓷填料 5~80份;助熔劑 0.01~50份。
所述縮合型矽樹脂的含量例如為53份、57份、61份、65份、69份、73份、77份、81份、85份、89份、93份、97份或99份。
所述催化劑的含量例如為0.0001份、0.0005份、0.001份、0.005份、0.01份、0.05份、0.1份、0.5份、0.9份、1.3份、1.7份、2.0份。
所述成瓷填料的含量例如為10份、15份、20份、25份、30份、35份、40份、45份、50份、55份、60份、65份、70份、75份或80份。
所述助熔劑的含量為0.01~50重量份,例如0.03份、0.1份、0.5份、1重量份、5重量份、9重量份、13重量份、17重量份、21重量份、25重量份、29重量份、33重量份、37重量份、41重量份、45重量份或49重量份。
在本發明中,所述助熔劑(flux,fluxing agent)是指能降低其他物質的軟化、熔化或液化溫度的物質。陶瓷化矽樹脂所用成瓷填料的熔點都很高,燃燒後陶瓷化溫度相應也很高。為了能“低溫燒成”,即能在較低溫度下開始陶瓷化,獲得一定的強度的陶瓷體,更好地發揮陶瓷化矽樹脂的防火功能,在配方中加入助熔劑。
在本發明中,所述助熔劑為玻璃添加劑、含硼化合物或氧化鋅中的任意一種或者至少兩種的混合物,較佳係玻璃粉、氧化鋅、氧化鐵或硼酸鋅中的任意一種或者至少兩種的混合物。
在本發明中,所述玻璃添加劑是為了改善陶瓷化樹脂組合物成瓷過程中的各項性能,使更易熔化、成型且儘量減少缺陷產生而在樹脂組合物中添加的一種或多種符合的原料,包括玻璃粉等。
在本發明中,所述成瓷填料是層狀矽酸鹽類礦物填料,呈晶體結構,具有高熔點(高耐火度)和高燒結度,且具有優良的電絕緣性能,包括雲母、矽灰石或高嶺土等中的任意一種或者至少兩種的組合。
本發明通過將縮合型矽樹脂與成瓷填料配合,在高溫燃燒時,矽樹脂分解產生的二氧化矽與成瓷填料發生反應,在填料的邊緣處形成“低共熔混合物”,從而在二氧化矽粒子和填料粒子之間起橋接作用,在著火溫度下使之固化,冷卻時形成凝聚的自支撐陶瓷化產物,其具有一定的強度且能承受一定的衝擊力,在火災過程中仍然可以保證電力與通訊的暢通。
在本發明中,所述縮合型矽樹脂主要為甲基矽樹脂、甲基苯基矽樹脂或苯基矽樹脂中的任意一種或者至少兩種的混合物。
在本發明中,所述縮合型矽樹脂為脫水縮合、脫醇縮合或脫氫縮合中的任意一種,其反應結構如下所示:
在本發明中,所述縮合型矽樹脂為R/Si=1.0~1.7(摩爾比)(例如1.1、1.2、1.3、1.4、1.5、1.6或1.7)和Ph/(Me+Ph)=0~1.0(摩爾比)(例如0.1、0.2、0.3、0.4、0.5、0.6、0.7、0.8、0.9或1.0)的甲基或甲基苯基矽樹脂,其中Ph代表苯基基團,Me代表甲基基團,R代表有機官能團-CH3、-Ph、-OCH3、-OCH2CH3或-OH。在縮合型矽樹脂中,R/Si(摩爾比)過小,Ph/Si(摩爾比)過低,矽樹脂固化後柔軟性差,漆膜變硬,而R/Si(摩爾比)過大,Ph/Si(摩爾比)過高層壓板硬度低,固化慢,熱固性低,故所述縮合型矽樹脂較佳係R/Si=1.2~1.7(摩爾比)且Ph/(Me+Ph)=0.2~0.6(摩爾比)的甲基苯基矽樹脂。
根據本發明,所述催化劑是環烷酸鋅、環烷酸錫、環烷酸鈷、環烷酸鐵、環烷酸鈰、羧酸鋅、羧酸錫、羧酸鈷、羧酸鐵、羧酸鈰、全氟磺酸、氯化磷腈、胺類、季銨堿、辛酸鋅、異辛酸鋅、鈦酸酯或胍類化合物等中的任意一種或者至少兩種的組合。
在本發明中,所述陶瓷化矽樹脂組合物還包括非成瓷填料或/及助劑。
在本發明中,所述助劑包括矽烷偶聯劑、鈦酸酯偶聯劑或分散劑中的任意一種或者至少兩種的組合。
所述助劑的含量為0.01~10重量份,例如為0.05份、0.1份、0.5份、1份、1.5份、2份、2.5份、3份、3.5份、4份、4.5份、5份、5.5份、6份、6.5份、7份、7.5份、8份、8.5份、9份或9.5份。
在本發明中,所述非成瓷填料泛指除本發明中成瓷填料以外的填料。
在本發明中,所述非成瓷填料包括二氧化矽、氧化鋁、氫氧化鋁、氮化硼、氮化鋁、氮化矽或碳化矽中的任意一種或者至少兩種的混合物。
在本發明中,所述非成瓷填料的含量為5~80重量份,例如10重量份、15重量份、20重量份、25重量份、30重量份、35重量份、40重量份、45重量份、50重量份、55重量份、60重量份、65重量份、70重量份或75重量份。
示例性的一種陶瓷化矽樹脂組合物,所述陶瓷化矽樹脂組合物按重量份數包括:縮合型矽樹脂 50~100份
催化劑 0.0001~2份
成瓷填料 5~80份
助熔劑 0.01~50份
非成瓷填料 5~80份
助劑 0.01~10份。
根據本發明,所述成瓷填料、助熔劑及非成瓷填料平均粒徑沒有特別限定,但獨立地較佳為10μm以下,更佳為5μm以下,並且每種填料可以單獨使用一種或者兩種以上,也可適當組合使用例如粒徑分佈、平均粒徑不同的組合物。
本發明所述的“包括”,意指其除所述組份外,還可以包括其他組份,這些其他組份賦予所述陶瓷化矽樹脂組合物不同的特性。除此之外,本發明所述的“包括”,還可以替換為封閉式的“為”或“由……
組成”。
例如,所述陶瓷化矽樹脂組合物還可以含有各種添加劑,作為具體例,可以舉出阻燃劑、抗氧劑、熱穩定劑、抗靜電劑、紫外線吸收劑、顏料、著色劑或潤滑劑等。這些各種添加劑可以單獨使用,也可以兩種或者兩種以上混合使用。
本發明的目的之二在於提供一種樹脂膠液,其是將如上所述的陶瓷化矽樹脂組合物溶解或分散在溶劑中得到。
作為本發明中的溶劑,沒有特別限定,作為具體例,可以舉出甲醇、乙醇、丁醇等醇類,乙基溶纖劑、丁基溶纖劑、乙二醇-甲醚、卡必醇、丁基卡必醇等醚類,丙酮、丁酮、甲基乙基甲酮、甲基異丁基甲酮、環己酮等酮類,甲苯、二甲苯、均三甲苯等芳香族烴類,乙氧基乙基乙酸酯、醋酸乙酯等酯類,N,N-二甲基甲醯胺、N,N-二甲基乙醯胺、N-甲基-2-吡咯烷酮等含氮類溶劑。上述溶劑可以單獨使用一種,也可以兩種或者兩種以上混合使用,較佳係甲苯、二甲苯、均三甲苯等芳香族烴類溶劑與丙酮、丁酮、甲基乙基甲酮、甲基異丁基甲酮、環己酮等酮類熔劑混合使用。所述溶劑的使用量本領域技術人員可以根據自己的經驗來選擇,使得到的樹脂膠液的固含量達到50~70%即可。
本發明的目的之三在於提供一種預浸料,其包括增強材料及通過含浸乾燥後附著在增強材料上的如上所述的陶瓷化矽樹脂組合物。
示例性的預浸料的製備方法為:以如上所述的陶瓷化矽樹脂組合物重量100份計算,加入甲苯或者二甲苯等有機溶劑製成固含量為50~70%(重量比)的樹脂膠液,由增強材料如
玻纖布浸漬該樹脂膠液,然後在120~190℃下烘烤2~15分鐘製備而得。
本發明的目的之四在於提供一種層壓板,所述層壓板含有至少一張如上所述的預浸料。
本發明的目的之五在於提供一種覆銅箔層壓板,所述覆銅箔層壓板包括至少一張疊合的如上所述的預浸料及壓覆在疊合後的預浸料的一側或兩側的銅箔。
與已有技術相比,本發明具有如下之功效:(1)本發明得到的陶瓷化矽樹脂層壓板在持續燃燒時可以形成堅硬結構,具有一定的強度且能承受一定的衝擊力,在持續明火燒蝕下也能保持層壓板的完整性;(2)本發明得到的陶瓷化矽樹脂層壓板具有極其優越的耐熱性,其1%的分解溫度高達548.7℃以上,不僅可應用與高功率電機的耐高溫電氣絕緣材料,還可應用與航空航天飛行器的耐高溫結構材料,具有非常廣泛的應用前景;(3)本發明的陶瓷化矽樹脂組合物具有無鹵、低煙、低毒、自熄和環保等優點,為層壓板及覆銅板在阻燃和耐火領域提供了新思路和新方法;(4)本發明的製備過程所有的工藝及設備為普通FR-4通用型,完全可以利用現有的生產設備來實施本發明,非常有利於產品的產業化。
下面通過具體實施方式來進一步說明本發明的技術手段。
實施例1
稱取R/Si=1.1(摩爾比),Ph/(Ph+Me)=0(摩爾比)的甲基矽樹脂100.0份,溶於120.0份甲苯溶劑中,攪拌使其完全溶解。待矽樹脂溶解完全後,加入雲母粉20.0份,高嶺土35.0份,矽灰石35.0份,氧化鋅15.0份,玻璃粉25.3份,異辛酸鋅0.0001份,氧化鋁10.0份,矽烷偶聯劑γ-(2,3-環氧丙氧基)丙基三甲氧基矽烷(美國,道康寧公司提供)8.9份,攪拌混合均勻得到膠液。選取平整光潔、厚度為0.1mm的E-玻纖布,均勻塗覆上述膠液,在烘箱中用170℃烘烤5min得半固化片。將8張上述半固化片疊加,上下附上35μm的銅箔,置於真空熱壓機中在3MPa壓力和220℃溫度下壓製3h得到層壓板。
該陶瓷化矽樹脂玻璃布層壓板的阻燃效果為UL V-0級,並且其1%的熱失重溫度高達548.7℃,具有極其優異的耐熱性;將雙面覆銅板切割200mmx200mm的尺寸並進行蝕刻處理,得有機矽樹脂層壓板,將層壓板在明火(800-1100℃)下燒蝕0.5h後成瓷效果明顯,層壓板質地堅硬,無明顯孔洞。
實施例2
稱取R/Si=1.4(摩爾比),Ph/(Ph+Me)=0.5(摩爾比)的甲基苯基矽樹脂80.0份溶於65.0份甲苯溶劑中,攪拌使其完全溶解。待矽樹脂溶解完全後,加入高嶺土40.4份,硼酸鋅25.7份,矽微粉23.0份,乙醯丙酮鈷0.08份,矽烷偶聯劑γ-甲基丙烯醯氧基丙基三甲氧基矽烷偶聯劑1.5份(湖北武大有機矽新材料股份有限公司提供),攪拌均勻得膠液。
除了使用該樹脂膠液外,與實施例1同樣進行,獲得預浸料
和厚度為1.0mm的雙面覆銅層壓板。
該陶瓷化矽樹脂玻璃布層壓板的阻燃效果為UL V-0級,並且其1%熱失重溫度高達611.8℃,具有極其優異的耐熱性。將雙面覆銅板切割200mmx200mm的尺寸並進行蝕刻處理,得有機矽樹脂層壓板,將層壓板在明火(800-1100℃)下燒蝕0.5h後成瓷效果明顯,層壓板質地堅硬,無明顯孔洞。
實施例3
稱取R/Si=1.7(摩爾比),Ph/(Ph+Me)=1.0(摩爾比)的苯基矽樹脂50.0份溶於80.0份甲苯溶劑中,攪拌使其完全溶解。待矽樹脂溶解完全後,加入矽灰石7.0份,玻璃粉0.05份,鈦酸酯1.5份,矽烷偶聯劑γ-甲基丙烯醯氧基丙基三甲氧基矽烷0.7份(湖北武大有機矽新材料股份有限公司提供),攪拌均勻得膠液。
除了使用該樹脂膠液外,與實施例1同樣進行,獲得預浸料和厚度為1.0mm的雙面覆銅層壓板。
該陶瓷化矽樹脂玻璃布層壓板的阻燃效果為UL V-0級,其1%熱失重溫度高達581.9℃,具有極其優異的耐熱性。將雙面覆銅板切割200mmx200mm的尺寸並進行蝕刻處理,得有機矽樹脂層壓板,將層壓板在明火(800-1100℃)下燒蝕0.5h後成瓷效果明顯,層壓板質地堅硬,無明顯孔洞。
實施例4
稱取R/Si=1.1(摩爾比),Ph/(Ph+Me)=0(摩爾比)的甲基矽樹脂40.0份和R/Si=1.7(摩爾比),Ph/(Ph+Me)=0.9(摩爾比)的甲基苯基矽樹脂40份,溶
於65.0份甲苯溶劑中,攪拌使其完全溶解。待矽樹脂溶解完全後,加入高嶺土40.4份,硼酸鋅25.7份,矽灰石15.0份,矽微粉23.0份,乙醯丙酮鈷0.08份,矽烷偶聯劑γ-甲基丙烯醯氧基丙基三甲氧基矽烷偶聯劑1.5份(湖北武大有機矽新材料股份有限公司提供),攪拌均勻得膠液。
除了使用該樹脂膠液外,與實施例1同樣進行,獲得預浸料和厚度為1.0mm的雙面覆銅層壓板。
該陶瓷化矽樹脂玻璃布層壓板的阻燃效果為UL V-0級,並且其1%熱失重溫度高達567.3℃,具有極其優異的耐熱性。將雙面覆銅板切割200mmx200mm的尺寸並進行蝕刻處理,得有機矽樹脂層壓板,將層壓板在明火(800-1100℃)下燒蝕0.5h後成瓷效果明顯,層壓板質地堅硬,無明顯孔洞。
比較例1
稱取甲基乙烯基矽樹脂100.0份(乙烯基質量分數5.0%),己炔醇0.003份,溶於120.0份甲苯溶劑中,攪拌使其完全溶解。待矽樹脂溶解完全後,加入含氫矽油(含氫質量分散1.2%)13.2份,鉑-甲基乙烯基絡合物0.001份,雲母粉20.0份,高嶺土35.0份,矽灰石35.0份,氧化鋅15.0份,玻璃粉25.3份,氧化鋁10.0份,矽烷偶聯劑γ-(2,3-環氧丙氧基)丙基三甲氧基矽烷(美國,道康寧公司提供)8.9份,攪拌混合均勻得到膠液。
除了使用該樹脂膠液外,與實施例1同樣進行,獲得預浸料和厚度為1.0mm的雙面覆銅層壓板。
該陶瓷化矽樹脂玻璃布層壓板的阻燃效果為UL V-1級,其1%熱失重溫度為296℃,耐熱性較縮合型矽樹脂較差。將雙面覆銅板切割
200mmx200mm的尺寸並進行蝕刻處理,得有機矽樹脂層壓板,將層壓板在明火(800-1100℃)下燒蝕0.5h後呈燒焦狀,成瓷效果不明顯。
比較例2
稱取R/Si=1.1(摩爾比),Ph/(Ph+Me)=0(摩爾比)的甲基矽樹脂100.0份,溶於120.0份甲苯溶劑中,攪拌使其完全溶解。待矽樹脂溶解完全後,加入雲母粉50.0份,高嶺土35.0份,矽灰石35.0份,氧化鋅15.0份,玻璃粉25.3份,矽灰石8.0,異辛酸鋅0.0001份,氧化鋁10.0份,矽烷偶聯劑γ-(2,3-環氧丙氧基)丙基三甲氧基矽烷Z-6040(美國,道康寧公司提供)8.9份,攪拌混合均勻得到膠液。
除了使用該樹脂膠液外,與實施例1同樣進行,獲得預浸料和厚度為1.0mm的雙面覆銅層壓板。
該陶瓷化矽樹脂玻璃布層壓板的阻燃效果為UL V-0級,其1%熱失重溫度為581.4℃,耐熱性優異。將雙面覆銅板切割200mmx200mm的尺寸並進行蝕刻處理,得有機矽樹脂層壓板,將層壓板在明火(800-1100℃)下燒蝕0.5h後呈粉末狀,無法成瓷。
比較例3
稱取R/Si=1.7(摩爾比),Ph/(Ph+Me)=1.0(摩爾比)的苯基矽樹脂50.0份溶於80.0份甲苯溶劑中,攪拌使其完全溶解。待矽樹脂溶解完全後,加入矽灰石7.0份,玻璃粉0.005份,鈦酸酯1.5份,矽烷偶聯劑γ-甲基丙烯醯氧基丙基三甲氧基矽烷0.7份(湖北武大有機矽新材料股份有限公司提供),攪拌均勻得膠液。
除了使用該樹脂膠液外,與實施例1同樣進行,獲得預浸料
和厚度為1.0mm的雙面覆銅層壓板。該陶瓷化矽樹脂玻璃布層壓板的阻燃效果為UL V-0級,其1%熱失重溫度為564.7℃,耐熱性較高。將雙面覆銅板切割200mmx200mm的尺寸並進行蝕刻處理,得有機矽樹脂層壓板,將層壓板在明火(800-1100℃)下燒蝕0.5h後可以成瓷,但燒蝕後層壓板出現大量大孔洞,成瓷效果欠佳。
比較例4
稱取R/Si=1.7(摩爾比),Ph/(Ph+Me)=1.0(摩爾比)的苯基矽樹脂50.0份溶於80.0份甲苯溶劑中,攪拌使其完全溶解。待矽樹脂溶解完全後,加入鈦酸酯1.5份,矽烷偶聯劑γ-甲基丙烯醯氧基丙基三甲氧基矽烷0.7份(湖北武大有機矽新材料股份有限公司提供),攪拌均勻得膠液。
除了使用該樹脂膠液外,與實施例1同樣進行,獲得預浸料和厚度為1.0mm的雙面覆銅層壓板。該陶瓷化矽樹脂玻璃布層壓板的阻燃效果為UL V-0級,其1%熱失重溫度為547.4℃,耐熱性優異。將雙面覆銅板切割200mmx200mm的尺寸並進行蝕刻處理,得有機矽樹脂層壓板,將層壓板在明火(800-1100℃)下燒蝕0.5h後呈粉末狀,無法成瓷。
申請人聲明,本發明通過上述實施例來說明本發明的詳細方法,但本發明並不局限於上述詳細方法,即不意味著本發明必須依賴上述詳細方法才能實施。所屬技術領域的技術人員應該明瞭,對本發明的任何改進,對本發明產品各原料的等效替換及輔助成分的添加、具體方式的選擇等,均落在本發明的保護範圍和公開範圍之內。
Claims (17)
- 一種陶瓷化矽樹脂組合物,其特徵係所述陶瓷化矽樹脂組合物按重量份數包括:
- 申請專利範圍第1項所述之陶瓷化矽樹脂組合物,其中,所述縮合型矽樹脂為R/Si=1.2~1.7(摩爾比)且Ph/(Me+Ph)=0.2-0.6(摩爾比)的甲基苯基矽樹脂。
- 如申請專利範圍第1項所述之陶瓷化矽樹脂組合物,其中,所述催化劑是環烷酸鋅、環烷酸錫、環烷酸鈷、環烷酸鐵、環烷酸鈰、羧酸鋅、羧酸錫、羧酸鈷、羧酸鐵、羧酸鈰、全氟磺酸、氯化磷腈、胺類、季銨堿、辛酸鋅、異辛酸鋅、鈦酸酯或胍類化合物中的任意一種或者至少兩種的組合。
- 如申請專利範圍第1項所述之陶瓷化矽樹脂組合物,其中,所述助熔劑 為玻璃添加劑、含硼化合物或氧化鋅中的任意一種或者至少兩種的混合物。
- 如申請專利範圍第1項所述之陶瓷化矽樹脂組合物,其中,所述助熔劑是玻璃粉、氧化鋅、氧化鐵或硼酸辛中的任意一種或者至少兩種的混合物。
- 如申請專利範圍第1-5項中任一項所述之陶瓷化矽樹脂組合物,其中,所述陶瓷化矽樹脂組合物還包括非成瓷填料或/及助劑。
- 如申請專利範圍第6項所述之陶瓷化矽樹脂組合物,其中,所述非成瓷填料包括二氧化矽、氧化鋁、氫氧化鋁、氮化硼、氮化鋁、氮化矽或碳化矽中的任意一種或者至少兩種的混合物。
- 如申請專利範圍第6項所述之陶瓷化矽樹脂組合物,其中,所述非成瓷填料的含量為5~80重量份。
- 如申請專利範圍第6項所述之陶瓷化矽樹脂組合物,其中,所述助劑包括矽烷偶聯劑、鈦酸酯偶聯劑以及分散劑中的一種或至少兩種的混合物。
- 如申請專利範圍第6項所述之陶瓷化矽樹脂組合物,其中,所述助劑的含量為0.01~10重量份。
- 如申請專利範圍第6項所述之陶瓷化矽樹脂組合物,其中,所述陶瓷化矽樹脂組合物按重量份數包括:
- 如申請專利範圍第11項所述之陶瓷化矽樹脂組合物,其中,所述成瓷填料、助熔劑及非成瓷填料的平均粒徑均獨立地選自10μm以下。
- 一種樹脂膠液,其特徵為其係將如申請專利範圍第1-12項中任一項所述之陶瓷化矽樹脂組合物溶解或分散在溶劑中得到。
- 一種預浸料,其特徵為其係包括增強材料及通過含浸乾燥後附著在增強材料上的如申請專利範圍第1-12項中任一項之一所述的陶瓷化矽樹脂組合物。
- 一種層壓板,其特徵為所述層壓板係含有至少一張如申請專利範圍第14項所述的預浸料。
- 一種覆銅箔層壓板,其特徵為所述覆銅箔層壓板係包括至少一張疊合的如申請專利範圍第14項所述的預浸料及壓覆在疊合後的預浸料的一側或兩側的銅箔。
- 一種印製電路板,其特徵為其係含有至少一張如申請專利範圍第15項所述的層壓板。
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