CN1167729A - 硅烷化硅酸 - Google Patents

硅烷化硅酸 Download PDF

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CN1167729A
CN1167729A CN97111729A CN97111729A CN1167729A CN 1167729 A CN1167729 A CN 1167729A CN 97111729 A CN97111729 A CN 97111729A CN 97111729 A CN97111729 A CN 97111729A CN 1167729 A CN1167729 A CN 1167729A
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silicic acid
silanized
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silanized silicic
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CN1083397C (zh
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维尔纳·哈尔特曼
尤尔根·迈尔
豪克·雅克布森
托马斯·亨尼希
亨宁·卡尔伯
乌维·沙赫特里
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Evonik Operations GmbH
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    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract

制备具有以下物理-化学特性的硅烷化硅酸：比表面积m2/g 80-400，初级颗粒粒径nm 7-40，堆密度g/l 50-300，pH 3-10，碳含量％0.1-15，DBP数％＜200。其中，在强烈地混合下，在合适的混合容器内，可以是首先用水或稀释酸、然后用一种表面改性剂或多种表面改性剂之混合物喷洒在硅酸上，然后混合，退火，再通分裂/压实，然后磨碎。

Description

硅烷化硅酸
本发明涉及低粘滞性硅酸，及其制备方法和用途。
本发明的目的是具有以下物理-化学特性的硅烷化硅酸：比表面积       m2/g    80-400初级颗粒粒径   nm        7-40堆密度         g/l      50-300pH                       3-10碳含量         ％       0.1-15DBP数          ％        ＜200
本发明的另一个目的是制备低粘滞性的硅烷化硅酸的方法，其特征在于，在强烈地混合下，在合适的混合容器内，可以是首先用水或稀释酸、然后用一种表面改性剂或多种表面改性剂之混合物喷洒在硅酸上，然后混合15-30分钟，在100-400℃的温度下退火1-6小时，然后通过机械作用(例如在球磨机中)将该疏水性硅烷化的硅酸分裂/压实，再用磨机(例如射流式磨机，棒磨机)将其磨碎。
硅酸优选为通过火解SiCl4制得的热解硅酸。
表面改性剂例如可以为六甲基二硅烷。
本发明的再一个目的是根据本发明之低粘滞性的硅烷化硅酸在制备屈服点低的低粘性聚合物系统中的用途，例如1-和2-组份的过氧化物缩合-和加成交联的硅橡胶材料、粘合剂、成型材料、密封材料等等，其还可作为例如漆料和箔片的消光剂，用于制备电缆凝胶的自由流动剂(例如SAP，灭火粉末)，液体塑料系统和反应树脂(例如合成大理石，聚合物混凝土，假齿)中的防沉积剂，抛光剂和/或擦拭物(Pùtzkrper)。
根据本发明的低粘滞性硅烷化硅酸具有以下优点：
在用合成硅酸增强的聚合物系统中，只有在非常高的填充度时才能得到良好的机械强度。在已知的硅酸中，这只有通过在制备/配制相应的密封材料、成型材料和复制材料时就地使增强的硅酸疏水化，方能成功。该方法是非常耗时和耗能的。
由于具有其低的粘滞作用和低的屈服点，根据本发明的硅酸可以得到高的填充度并因而具有良好的机械强度。这可以很大程度地取消上述之耗费的配制过程。
根据本发明的方法还具有以下优点：由于是连续的方法，可以降低产品质量的波动。
实施例
将Aerosil200与4.3份的水和18.5份的HMDS(六甲基二硅烷)混合，然后在140℃下退火。接着在连续运转的立式球磨机中将疏水性的硅烷化硅酸压实，直至约250g/l。然后用射流式磨机将硅酸磨碎。
所得硅酸具有以下特性：
 实施例   BETm2/g   堆密度g/l    pH  碳含量  干燥损失％  退火损失％   DBP数％
   VT1128/l   145    188    7.3    2.7    2.4    0.3    90
应用技术测试2K-RTV-硅氧烷橡胶(填充度20％)流变学：  屈服点1.9Pa
      粘度  30.9s-1机械特性：抗拉强度    1.7N/mm2
      拉断伸长度  230％断裂强度    14.0N/mmShoreA硬度  34

Claims (3)

1、具有以下物理-化学特性的硅烷化硅酸：比表面积      m2/g   80-400初级颗粒粒径  nm       7-40堆密度        g/l     50-300pH                     3-10碳含量        ％     0.1-15DBP数         ％     ＜200。
2、制备如权利要求1的硅烷化硅酸的方法，其特征在于，在强烈地混合下，在合适的混合容器内，可以是首先用水或稀释酸、然后用一种表面改性剂或多种表面改性剂之混合物喷洒在硅酸上，然后混合15-30分钟，在100-400℃的温度下退火1-6小时，然后通过机械作用将该疏水性的硅烷化的硅酸分裂/压实，再用磨机将其磨碎。
3、如权利要求1的硅烷化硅酸在制备屈服点低的低粘性聚合物系统中的用途，其还可作为消光剂(例如在漆料和箔片中)，自由流动剂(例如SAP，灭火粉末)，电缆凝胶，液体塑料系统和反应树脂中的防沉积剂，抛光剂和/或擦拭物。
CN97111729A 1996-04-26 1997-04-24 硅烷化硅酸、其制备方法及用途 Expired - Lifetime CN1083397C (zh)

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DE19616781A DE19616781A1 (de) 1996-04-26 1996-04-26 Silanisierte Kieselsäure
DE19616781.7 1996-04-26

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CN1320045C (zh) * 2002-12-18 2007-06-06 德古萨公司 结构－涂覆的二氧化硅和其制备方法、涂料体系及其用途以及塑料体
CN101755016A (zh) * 2007-07-30 2010-06-23 赢创德固赛有限责任公司 表面-改性的、热解制备的二氧化硅
CN102391296A (zh) * 2011-07-13 2012-03-28 东营旭业化工有限公司 疏水性硅烷分散剂的制备方法
CN101796145B (zh) * 2007-07-06 2013-04-17 卡伯特公司 经表面处理的金属氧化物颗粒

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CN1320045C (zh) * 2002-12-18 2007-06-06 德古萨公司 结构－涂覆的二氧化硅和其制备方法、涂料体系及其用途以及塑料体
CN101796145B (zh) * 2007-07-06 2013-04-17 卡伯特公司 经表面处理的金属氧化物颗粒
CN101755016A (zh) * 2007-07-30 2010-06-23 赢创德固赛有限责任公司 表面-改性的、热解制备的二氧化硅
US8512595B2 (en) 2007-07-30 2013-08-20 Evonik Degussa Gmbh Surface-modified, pyrogenically prepared silicas
CN102391296A (zh) * 2011-07-13 2012-03-28 东营旭业化工有限公司 疏水性硅烷分散剂的制备方法
CN102391296B (zh) * 2011-07-13 2014-05-14 山东旭业新材料股份有限公司 疏水性硅烷分散剂的制备方法

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CA2203726A1 (en) 1997-10-26
KR970069878A (ko) 1997-11-07
DE59709069D1 (de) 2003-02-13
EP0808880B1 (de) 2003-01-08
JP3553315B2 (ja) 2004-08-11
CA2203726C (en) 2001-08-07
EP0808880A3 (de) 1999-10-27
DE19616781A1 (de) 1997-11-06
JPH1087317A (ja) 1998-04-07
EP0808880A2 (de) 1997-11-26
CN1083397C (zh) 2002-04-24

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