CN101305039B - 纳米材料在次级电绝缘涂料中的应用 - Google Patents
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Abstract
披露了应用纳米材料的阻隔性能效应以提高电磁设备的电绝缘抗性和防腐蚀强度性能。用以涂覆树脂的重量份计为1-20%,并且优选1-5%的纳米材料装填量实现了有利的效果。纳米材料包括,但不限于,二氧化硅、氧化铝、氧化锆和五氧化锑,其直接分散在涂料中或者预先分散在适用于树脂体系的溶剂的载体中。所得的制剂受益于:不需要将抗沉降剂引入树脂以保持无机材料悬浮。并且,树脂体系的流变性没有显著改变,这将另外影响树脂的加工用于它们预期的应用。
Description
发明背景
本发明涉及电磁设备;并且更特别地涉及纳米材料在用于这些设备的绝缘涂料中的应用。
有机树脂组合物被用作涂料,因为它们赋予电磁设备机械、电和环境抗性。涂料提供了机械强度、电绝缘和环境保护而用于设备的改进的长期耐用性,以及增强了最终产品的质量。通过加入无机填料例如二氧化硅、碳酸钙、氧化铝等可以提高这些有利性能中的一些。然而,伴随着该技术的现有状态的问题是用于涂料中的无机材料通常不会在涂料中保持悬浮,导致非均匀的混合物。当将涂料涂覆在设备上时,具有弱性结果的区域反过来可能造成设备失效。
该技术的现有状态产生了涉及涂料的处理、搅拌(以在涂覆之前产生均匀性)和泵送的几个问题,以及与涂覆的液体和所得的固化薄膜的均匀性相关的问题。用于解决这些问题的现有方法集中于使用锻制二氧化硅和其他材料作为用于无机材料的悬浮剂。但在一些情况下,由于出现的流变性变化,这些试剂的使用产生所不希望的结果并且造成涂覆的涂层中的不一致性。
发明简述
本发明旨在利用纳米材料的阻隔性能效应以提高电磁设备的电绝缘抗性和防腐蚀性的涂料,这些涂料没有上述非均匀性问题。用以相对于涂覆树脂的重量份计的1-20%,并且优选1-5%的纳米材料装填量实现了这些有利的效果。使用的材料包括,但不限于,二氧化硅、氧化铝、氧化锆和五氧化锑。这些直接分散在涂料中或者预先分散在适用于被改进的树脂体系的溶剂的载体中。所得的制剂受益于:不需要将抗沉降剂引入混合物以保持无机材料悬浮在涂料中。另一个优点是树脂体系的流变性没有显著改变,这将另外影响树脂在它们的预期应用中的加工。
在下文中,其他目的和特征将部分地明显并且被部分地指出。
发明详述
以下详述通过例子并且不通过限制来解释本发明。该描述将明显使得本领域技术人员能够制造和利用本发明,并且描述了本发明的一些实施方案、改进、变化、替代物和应用,包括我们目前认为是实施本发明的最好方式的那些。由于在不偏离本发明的范围的情况下在上述结构中可以进行各种变化,因此我们意在使以上描述中包含的或者附图中示出的所有事物将被解释为说明性的并且没有限制的含义。
根据本发明,利用纳米材料的阻隔性能效应以提高用引入纳米材料的涂覆树脂涂覆的电磁设备的电绝缘抗性和防腐蚀性能,同时避免了前述的均匀性问题。为了实现这些所希望的结果,在配制涂覆在设备上的涂覆树脂过程中使用1-150纳米的无机材料。相反,现有技术填料体系中无机颗粒的尺寸处于3000-4500纳米的数量级。合适的化学物质通常是环氧化物以及环氧化物和聚酯的共聚物。进一步合适的化学物质包括,但不限于,不饱和聚酯、环氧化物、氨基甲酸酯、水性聚酯、环氧乳液、有机溶剂生的醇酸树脂、丙烯酸酯化氨基甲酸酯、丙烯酸酯化环氧化物、丙烯酸酯化多醇和丙烯酸酯化植物油。环氧化物将包括基于双酚A、双酚F、酚醛清漆和环脂族物质的那些。使用相对于树脂为1-20%重量份,并且优选1-5%重量份纳米材料的纳米材料装填量,实现了所希望的效果。纳米材料包括,但不限于,二氧化硅、氧化铝、氧化锆和五氧化锑。本领域那些技术人员将理解的是通过包含合适数量的纳米材料或纳米材料的组合,可以调节所得的涂料以满足用于设备的特定性能要求。本发明的涂料的一个重要优点是树脂体系的流变性不会显著变化;尽管在一些情况下所得混合物的粘度增加。然而总的而言,用于它们预期应用的树脂的加工不会实质性改变。
就纳米材料的使用而言,它们小的颗粒尺寸是指给定数量的材料更均匀分布遍及树脂,产生对于腐蚀试剂穿透而言更困难的更加曲折的路径。另外,颗粒彼此相邻,促进任何电荷的分散,由此导致改进的设备电性能。
在根据本发明制备的涂料中,使用纳米材料产生的阻隔效应产生了显著的结果。例如,尽管在使用其他无机填料制备涂料中使用较低数量的无机纳米材料,但也出现了上面提及的提高的电和腐蚀抗性性能。同样,尽管在涂料中使用较低数量的无机纳米材料,但涂料也具有提高的耐磨性。第三,该新涂料中的一些可以具有比现有涂料更低的粘度。所有这些特征用于在涂料的加工选择中提供更大的灵活性,同时获得用于完成的设备的所希望的性能特征。
在制备期间,将纳米材料直接分散在涂料中。或者作为选择,将纳米材料预先分散在适用于被改进的树脂体系的溶剂的载体中。所得制剂的显著优点是不需要将抗沉降剂或悬浮剂例如锻制二氧化硅等加入所得溶液中以保持纳米材料悬浮在其中。第二个优点是,与具有无机填料的常规涂料所需要的相比,借助于混合物的微量搅拌实现并且保持了涂料混合物的均匀性。
使用目前在工业中使用的相同方法涂覆纳米材料改性的有机涂料。这些包括,但不限于,浸渍和烘焙、滴流、真空/压力浸渍、辊涂通过、喷射和真空浸渍。另外,使用目前有效的方法例如烧气的烘箱、电阻加热、红外射线加热、化学催化和紫外(UV)射线固化将根据本发明制备的涂料固化。与涂覆方法无关,引入纳米材料的涂料更容易流到被涂覆的电磁设备的区域中,因为无机纳米材料具有比常规涂料中使用的无机填料更小的颗粒尺寸。另外,就UV固化方法而言,发现根据本发明制备的涂料展现出改进的光学透明性。这有助于使用目前由于现有涂料中无机填料的存在而不能使用的UV诱导的固化方法。
以下论述涉及表1和2。
表1
标准填充的UPE | 体系I | 体系II | |
商业聚酯A | 70 | 99 | 97 |
二氧化硅,2.9微米 | 30 | 0 | 0 |
纳米氧化铝,50纳米 | 0 | 1 | 3 |
表2
标准WBPE | 体系III | |
商业水性聚酯 | 100 | 97 |
纳米氧化铝,150纳米 | 0 | 3 |
制备:
参照表1,使用高速分散方法通过将30重量份(pbw)二氧化硅分散在70pbw的UPE树脂中制备标准填充的不饱和聚酯(UPE)涂料,直到所得的混合物均匀。另外,制备两种纳米改性的UPE样品。第一种-在表1中称为体系I,通过将1pbw纳米材料加入99pbwUPE树脂中并且然后混合直到分散而制备。第二种-在表1中称为体系II,通过将3pbw纳米材料加入97pbwUPE树脂中并且再次混合直到良好分散而制备。
参照表2,纳米改性的水性聚酯(WBPE)涂料-在表中称为体系III,是通过将3pbw纳米材料加入97pbwWBPE中并且混合直到良好分散而制备。该体系的WBPE组分包含预先分散在水中的氧化铝。
代表性制剂的物理性能列于表3中。
表3
标准UPE | 标准填充的UPE | UPE w/纳米材料 | |
无机装填量,% | 0 | 30 | 3 |
粘度,25℃,Cp | 100-200 | 150-250 | 150-400 |
密度,25℃ | 1.09 | 1.30 | 1.09 |
制剂例子的测试结果列于表4和5中,其中用于腐蚀的1-10的腐蚀和沉淀等级基于1为最差,10为最好。
表4
标准填充的UPE | 体系I | 体系II | |
脉冲持续时间,分钟 | 3200 | 4 | >6000 |
螺旋线圈粘结强度,lbs | 23 | 15 | 20 |
介电强度,vpm | 3000 | 3500 | 4300 |
腐蚀 | 6 | 6 | 8 |
沉淀 | 1 | 9 | 9 |
表5
标准WBPE | 体系III | |
脉冲持续时间,分钟 | 28 | 56 |
螺旋线圈粘结强度,lbs | 12 | 12 |
介电强度,vpm | 5400 | 3100 |
腐蚀 | 10 | 10 |
沉淀 | 10 | 9 |
鉴于上面,将看出实现了本发明的几个目的和优点并且获得了其他有利的结果。
上面已经描述了本发明,本发明要求并且期望保护的范围见于权利要求书。
Claims (6)
1.纳米材料用于提高电磁设备的电绝缘抗性和防腐蚀性能的用途,其中将1-20%重量份纳米材料加入到涂料树脂材料中并与其混合,将获得的均匀涂料混合物涂覆于电磁设备,
其中该纳米材料是二氧化硅、氧化铝、氧化锆或五氧化锑中的一种且在1-150纳米的范围内。
2.权利要求1的用途,其中1-5%重量份的纳米材料被加入树脂材料中。
3.权利要求1的用途,其中该涂料包含环氧化物以及环氧化物和聚酯的共聚物。
4.权利要求1的用途,其中树脂材料是水性聚酯(WBPE)涂覆材料。
5.权利要求1的用途,其中纳米材料直接分散在树脂材料中。
6.权利要求1的用途,其中将纳米材料预先分散在适用于纳米材料与其混合的树脂材料的载体中。
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US20110092607A1 (en) * | 2008-05-27 | 2011-04-21 | Koninklijke Philips Electronics N.V. | Method of preparing a rigid foam material and method of preparing a resin material with reduced viscosity |
DE102008048874A1 (de) * | 2008-09-25 | 2010-04-08 | Siemens Aktiengesellschaft | Beschichtungen für elektronische Schaltungen |
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EP2521247A1 (de) * | 2011-05-06 | 2012-11-07 | Siemens Aktiengesellschaft | Elektrisches Glimmschutzsystem für eine Hochspannungsmaschine |
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CN110183935A (zh) * | 2019-06-04 | 2019-08-30 | 上海电气输配电试验中心有限公司 | 环保气体中新型棒电极表面涂覆层制备工艺 |
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US7381359B2 (en) * | 2004-10-14 | 2008-06-03 | Yazaki Corporation | Method for making filled epoxy resin compositions |
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US7579397B2 (en) * | 2005-01-27 | 2009-08-25 | Rensselaer Polytechnic Institute | Nanostructured dielectric composite materials |
US7964236B2 (en) * | 2005-10-18 | 2011-06-21 | Elantas Pdg, Inc. | Use of nanomaterials in secondary electrical insulation coatings |
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2005
- 2005-10-18 US US11/252,921 patent/US7964236B2/en active Active
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2006
- 2006-10-16 AU AU2006303341A patent/AU2006303341B2/en active Active
- 2006-10-16 WO PCT/EP2006/067451 patent/WO2007045633A1/en active Application Filing
- 2006-10-16 BR BRPI0617623-2A patent/BRPI0617623A2/pt not_active Application Discontinuation
- 2006-10-16 CA CA2626038A patent/CA2626038C/en active Active
- 2006-10-16 CN CN2006800414941A patent/CN101305039B/zh active Active
- 2006-10-16 EP EP06807306A patent/EP1940933A1/en not_active Ceased
- 2006-10-18 TW TW095138465A patent/TWI414572B/zh active
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2007
- 2007-03-01 US US11/680,681 patent/US20070142526A1/en not_active Abandoned
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US4760296A (en) * | 1979-07-30 | 1988-07-26 | General Electric Company | Corona-resistant insulation, electrical conductors covered therewith and dynamoelectric machines and transformers incorporating components of such insulated conductors |
WO1996041909A1 (en) * | 1995-06-08 | 1996-12-27 | Weijun Yin | Pulsed voltage surge resistant magnet wire |
CN1343363A (zh) * | 1999-03-06 | 2002-04-03 | 纳幕尔杜邦公司 | 用于金属导体的涂料组合物和涉及它的使用的涂敷方法 |
CN1437512A (zh) * | 1999-12-28 | 2003-08-20 | 阿尔斯托姆(瑞士)有限公司 | 通过粉末涂覆法制造导线绝缘的方法 |
CN1455933A (zh) * | 2001-01-29 | 2003-11-12 | 捷时雅株式会社 | 介电体用复合颗粒、超微颗粒复合树脂颗粒、介电体形成用组合物及其用途 |
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AU2006303341B2 (en) | 2011-12-01 |
TWI414572B (zh) | 2013-11-11 |
US20070142526A1 (en) | 2007-06-21 |
CA2626038C (en) | 2014-05-06 |
WO2007045633A1 (en) | 2007-04-26 |
US20070087116A1 (en) | 2007-04-19 |
US7964236B2 (en) | 2011-06-21 |
CN101305039A (zh) | 2008-11-12 |
BRPI0617623A2 (pt) | 2011-08-02 |
CA2626038A1 (en) | 2007-04-26 |
AU2006303341A1 (en) | 2007-04-26 |
TW200724622A (en) | 2007-07-01 |
EP1940933A1 (en) | 2008-07-09 |
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