CN101437595B - 用开孔蜜胺/甲醛树脂泡沫填充的管及作为过滤器或静态混合器的用途 - Google Patents
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Abstract
本发明涉及一种用基于氨基树脂,特别是蜜胺/甲醛缩合产物的开孔泡沫填充的管,及其用途,特别是作为过滤器或静态混合器的用途。
Description
本发明涉及一种用基于氨基塑料的开孔泡沫填充的管及其用途。
基于蜜胺-甲醛缩合物的开孔泡沫在建筑和车辆中的各种隔热和隔声应用以及作为绝缘和减震包装材料是已知的。EP-A683349描述了由开孔蜜胺-甲醛泡沫组成的管壳,其中该壳的耐热性阻止了在加热以此绝热的管时该壳的收缩。
EP-A1 498 680描述了由泡孔已用可流动的传热介质完全或在某种程度上填充并且可具有可例如由聚烯烃箔组成的壳的蜜胺-甲醛泡沫组成的冷藏箱部件和保温部件。
本发明的目的是找到一种可过滤或混合液体并且特别适合于少量液体的简单装置。
因此,已找到一种用基于氨基塑料的开孔泡沫填充的管。
优选所用开孔泡沫为密度为3-100g/l,特别为5-20g/l的基于蜜胺-甲醛缩合物的弹性泡沫。泡孔数通常为50-300个泡孔/25mm。拉伸强度优选为100-150kPa,断裂拉伸应变通常为8-20%。
对于不同的应用领域,可能有利的是开孔泡沫在各个管段中具有不同的孔尺寸分布,例如从大孔到小孔呈线性或指数梯度的形式。例如,泡孔数可在该管的一端为50-120个泡孔/25mm,而在另一端为150-300个泡孔/25mm。
对于其生产,可根据EP-A071672或EP-A037470使用热空气、蒸汽或微波辐射使高度浓缩的包含发泡剂的蜜胺-甲醛预缩合物溶液或分散体发泡并硬化。该类型的泡沫由BASF Aktiengesellschaft以市售。
蜜胺-甲醛的摩尔比通常为1:1-1:5。例如如WO01/94436中所述,为生产甲醛特别低的泡沫,摩尔比选择为1:1.3-1:1.8,并使用无亚硫酸盐基团的预缩合物。
为提高性能,随后可将该泡沫热调节并压制。该处理步骤可改变泡沫的表面性质、亲水性程度、密度和孔尺寸。使材料热成型的常用方法使用用粘合剂饱和并在饱和的泡沫进行成型的步骤中硬化该粘合剂。还可不添加任何其他助剂而形成可热成型的材料,如EP1505105中所述。
由热成型方法得到的泡沫的孔结构控制可由对该泡沫不同区域的不同程度压制进行。变形的样品可经加热以新形状固定。可以生产具有密度梯度和孔尺寸梯度的样品。例如,可使用平面压机使楔形样品变形或使用楔形压机使平面样品变形,并可固定这些样品的梯度结构。还可将两种或更多种具有不同压缩程度的单一产品结合。得到的梯度结构或组合结构在机械性能上也可能是有利的。
可将泡沫切割成所需形状和厚度。还可进行成型切割并且例如可得到表面积增加的泡沫制品。
蜜胺-甲醛泡沫可具有疏水和/或疏油性能,例如如DE10011388中所述。液-液分离方法可由未改性泡沫和疏水化泡沫结合而实现。可有利地结合两个或更多个该类元件以增强效果。
管、管道和贮藏容器通常由具有抗扭刚度的材料如玻璃、金属或塑料组成,特别由钢、铝或纤维增强塑料组成。合适的塑料是聚乙烯、聚丙烯、环氧树脂或聚酯树脂,该塑料合适的话可通过每种情况下由碳或玻璃组成的纤维、织物或网增强。
所述管通常是细长的如圆柱形的,并具有圆形的、椭圆形的或多边形的横截面。该管直径优选为1-100mm,特别优选5-50mm。该管长度或用开孔泡沫填充的管段的长度优选为5-500mm,特别优选10-100mm。取决于意欲的应用(实例是过滤应用),该管用作使用各意欲应用所常用的材料、尺寸和形状的容器或框架,实例是由金属、塑料或木材制成的矩形或正方形框架。
因开孔泡沫在约-180℃至+200℃的温度下是弹性的,可容易地将该泡沫引入预制管或预制容器部件中。该泡沫甚至在低温如低于-80℃下保持弹性。没有发生由脆裂造成的损坏。借助弹性、耐热性和耐化学性,本发明的管可以在宽温度范围内与各种化学品或甚至与低温液体接触。低温液体在大气压下的沸点低于-80℃。特别优选液态空气、氮、氢、氩、氖、氦或液化发动机燃料如丙烯或主要由甲烷组成的天然气。
通常冲压或切割所述开孔泡沫以提供精确配合并将其引入管中。然而,还可将具有不同横截面的泡沫片段插入具有均匀横截面的管中。这使沿该管方向上的泡孔尺寸和每单位体积的泡孔数得以改变。例如,可将圆锥形泡沫片段以泡孔尺寸从一端到另一端连续降低的方式插入圆柱形管中。
还可将该泡沫安装在管的开口端上并且不伸入内部地从外面固定到该管上。可有利地将该泡沫用作多孔螺帽内部的镶嵌物。此时,可通过拧紧作用简单应用并固定该泡沫。
可由粘合剂粘合或机械紧固件将所述开孔泡沫固定在管中。可使用密封材料(如基于聚硅氧烷)来弥补不精确配合。
可将本发明的用开孔泡沫填充的管直接或通过其他管接头或软管接头零件连接到贮藏容器。还可根据该应用将该管与其他填充或未填充的管结合而得到复合管。
本发明的管特别适合作为液体的静态混合器。这里合适的管的实例是作为有源混合元件的其下部或其分叉已用开孔泡沫填充的Y-形管。开孔的孔尺寸允许由适当尺寸化制造微反应器。使用超声波可以改善两种或更多种组分的层流在开孔泡沫中的混合。若将薄且呈弹性的管用于作为静态混合器的应用,则也可通过振动压缩改善混合。
另一实施方案为一个或多个管区段装入其中的主管。主管或各个管段和侧管都有开孔泡沫填充物。该方法允许例如通过沿主管的侧管引入两种或更多种化学组分并允许其混合和反应。在管段装入点之间的距离和管径在这里可适应于反应动力学。
本发明的管还适合于过滤液体或气溶胶,例如从浆汁或预发酵混合物中除去悬浮物质。用于此的装置实例是已将开孔泡沫引入其管状出口的漏斗。本发明的管还适于医药和环境技术中的过滤,例如作为肾脏过滤器或血液过滤器,或用于过滤含水悬浮液。本发明的管还可以用于色谱法如凝胶色谱法中,此时经由开孔泡沫泡孔壁的化学改性。为此,例如可以在开孔泡沫中聚合丙烯酰胺。由于物质的流动呈高度层流,分离效果得以提高。
在另一优选方法中,其中将圆锥形泡沫段在加压下引入并且其中插入的开孔泡沫的泡孔结构从粗泡孔到细泡孔连续改变的管可用于过滤操作。随后在粗泡孔端应用待过滤的流体,此时在泡沫孔中优选首先吸收粗悬浮物质,最后吸收细悬浮物质。该作用相对于仅由小孔组成的过滤器使过滤器材料上的压降得以降低。该梯度结构允许由过滤除去的颗粒分布在整个材料内,并避免了仅在表面形成并导致大的压降的滤饼。对没有渗入泡沫结构的粗颗粒的过滤可通过增大泡沫制品表面积来改进。
本发明的管也适于气态物质、液体或气溶胶的过滤或分离,例如从浆汁或预发酵混合物中除去悬浮物质,或作为柴油车的烟灰除去器。用于此的装置实例是已将开孔泡沫引入其管状出口的漏斗。
本发明的管还适于爆炸保护,这通过抑制爆炸性气体混合物或粉尘的形成或燃烧而进行。
本发明的管还可用于液体燃料的输送或可控燃烧。毛细力使泡沫吸收液体燃料,将该燃料在泡沫表面燃烧。灯芯效应将该液态燃料向前输送到燃烧点,其中该燃料以缓慢可控的方式燃烧,但该泡沫不燃烧或不碳化。该泡沫阻止了对因蒸发提高将更快耗尽的燃料的任何显著加热。由于蜜胺-甲醛泡沫具有低燃烧性,一旦燃料耗尽,泡沫本身不会继续燃烧,仅在某种程度上碳化。因为蜜胺-甲醛树脂结构具有高交联度,常规液体燃料不会引起可能在机械性能和防火性能上产生不利影响的聚合物结构的溶胀。
实施例
发明实施例1(茶灯)
对带有开孔蜜胺-甲醛泡沫的盘的下侧不进行任何显著加热并可容易地将其固定在不燃手柄上。在耗尽乙醇前的燃烧时间是12.5分钟。在燃烧过程结束时,最上面泡沫层发生轻微碳化。燃烧自发停止后,在含有泡沫的同一盘中再添加15mL乙醇并使其燃烧。燃烧时间稍微降至10分钟。在同一盘中再添加两次乙醇并使其燃烧,随后泡沫基本保持完整。表面结皮增加及燃烧时间减少是观察到的唯一现象。
重复发明实施例1,不同的是使用铝盖来覆盖填充乙醇的铝盘。该盖的中心穿孔。将一条通过开孔插入并伸入填充乙醇的盘中,由此被液体饱和。使乙醇饱和的条燃烧,并通过受控燃烧消耗乙醇。燃烧时间比发明实施例1中大许多倍。
对比例1:
类似于实施例1,在不含泡沫的盘中添加15mL乙醇并使其燃烧。在燃烧过程中,对不含泡沫的盘(包括其下侧)进行显著加热,在燃烧6.5分钟后所有乙醇耗尽。
发明实施例3
将使用过热蒸汽的压板压蒸机用于将如EP1505105实施例1中的长方形可热成型蜜胺-甲醛泡沫样品压缩到其最初厚度的50%。将压缩样品在200℃下热调节2分钟并由此将其以压缩形状固定。
热成型样品的压汞体积平均孔径为117μm。未压缩对比样品的平均孔径为170μm。
发明实施例4
将另一个如EP1505105实施例1中的可热成型蜜胺-甲醛泡沫样品以其长度为150mm、宽度为45mm及其高度从28mm至88mm均匀提高的方式切割成楔形。然后通过使用过热蒸汽的压板压蒸机将该样品压制到28mm的均匀高度。将该样品在200℃下热调节2分钟并由此将其以压缩形状固定。
热调节的样品具有梯度结构。密度和压缩强度随着压缩程度提高而连续提高。热成型样品在最初高度为28mm那端的压汞体积平均孔径为170μm。对比样品在最初高度为88mm样品区的平均孔径为110μm。
发明实施例4表明对过滤和毛细力非常重要的泡沫密度和孔尺寸可以简单的方式调节并且梯度结构也是可能的。
发明实施例5
将密度为约10kg/m3的开孔蜜胺-甲醛泡沫(,BASFAktiengesellschaft)盘置于100mL缠绕/泡罩(wound/blister)注射器(一次性注射器)的下端。该盘的厚度为约20mm且其直径与注射器的相对应。
从上面向其顶部已打开的一次性注射器添加各自为30mL的两种PU组分。将注射器抽气活塞放在适当位置并且将之前未混合的组分压制通过泡沫盘。在从注射器将反应混合物注入后,足够彻底地混合反应性PU组分以使其相互反应并形成均匀的刚性聚氨酯泡沫。
在类似的但不使用泡沫的程序中,几乎不发生这些组分的任何混合,因此仅有限的发泡是可能的且该泡沫具有非常不均匀的结构。
所用聚氨酯体系:
由下列物质组成的多元醇组分:聚醚醇、水、叔胺、聚硅氧烷稳定
剂、发泡剂
粘度:约1000mPa.s(25℃)
异氰酸酯组分: Lupranat M20W(二苯基甲烷二异
氰酸酯)
粘度:155-235mPa.s(25℃)
发明实施例5表明本发明的泡沫可用作简单的静态混合元件。
发明实施例6
在玻璃烧瓶中添加10块密度为9kg/m3的开孔蜜胺-甲醛泡沫,BASF AG)的立方体样品(10×10×10mm)并用17.5g硬脂基异氰酸酯在332.5g已添加5滴催化剂(Lupragen N201,BASF AG,三亚乙基二胺在双丙甘醇中浓度为33%的溶液)的甲苯中的溶液饱和。将含有饱和的泡沫立方体的溶液在80℃的回流下加热8小时。然后通过倾析除去甲苯溶液。将挤压以除去大部分吸收液体的泡沫立方体干燥至恒重。疏水改性泡沫样品的密度为18.5kg/m3。该改性泡沫漂浮在水面上而水并没有显著将其润湿,且吸水率小于5体积%。
将直径为约1cm的Y-形玻璃管以两个开口向下且一个开口向上的方式固定。该管向下的那部分用未改性蜜胺-甲醛泡沫填充。该管的另一部分用疏水改性泡沫填充。两种泡沫填充物都尽可能向Y-形管上所有三个组成管会合的那部分延伸。
首先通过上口添加一些水。所述水由未改性泡沫吸收。然后由上管在玻璃管中添加一些甲苯并由疏水改性泡沫吸收。
在玻璃烧杯中分别添加有色水(染料:Cu酞菁配合物,Basantol Blue762liquid,BASF AG)和约等量甲苯。在混合物中逐步添加氯仿直到无色有机相密度与有色水相密度足够接近以致在搅拌混合物后该混合物完全分成两相需要至少5秒。再次搅拌该液体混合物并立即添加到填充玻璃管中。观察到液体混合物在该玻璃管中分离。有色水相通过未改性泡沫填充的那部分管流出,而无色有机相通过有疏水改性泡沫的那部分管流出。
发明实施例7
使平均粒径为1-2μm的粉状石灰石借助空气流通过网,并测定过滤器上游和下游的粉尘浓度。
对比例Comp1
表1:
Claims (9)
1.一种用基于氨基塑料的开孔泡沫填充的管,其中所述开孔泡沫由蜜胺-甲醛树脂组成,并且在不同的管段中具有不同的孔尺寸分布,并且其中所述开孔泡沫的泡孔数在该管的一端为50-120个泡孔/25mm,而在该管的另一端为150-300个泡孔/25mm。
2.根据权利要求1的管,其中所述开孔泡沫的堆密度为3-100g/l。
3.根据权利要求1的管,其中所述开孔泡沫的泡孔结构从粗泡孔到细泡孔连续改变。
4.根据权利要求2的管,其中所述开孔泡沫的泡孔结构从粗泡孔到细泡孔连续改变。
5.根据权利要求1-4中任一项的管,其管壁由玻璃、金属或塑料组成。
6.根据权利要求1-4中任一项的管,其直径为1-100mm,其中用所述开孔泡沫填充的管段的长度为5-500mm。
7.根据权利要求5的管,其直径为1-100mm,其中用所述开孔泡沫填充的管段的长度为5-500mm。
8.根据权利要求1-7中任一项的管在过滤液体或气体中的用途。
9.根据权利要求1-7中任一项的管在过滤液体中的用途,其中在粗泡孔端应用待过滤的液体。
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EP06111815.4 | 2006-03-28 | ||
EP06111815 | 2006-03-28 | ||
PCT/EP2007/052782 WO2007110384A2 (de) | 2006-03-28 | 2007-03-23 | Mit einem offenzelligen melamin/formaldehydharzschaumstoff gefülltes rohr und verwendung als filter oder statischer mischer |
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EP (1) | EP2001575A2 (zh) |
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DE102006047619B4 (de) * | 2006-10-09 | 2008-11-13 | Clariant International Limited | Verfahren zur Herstellung basischer Fettsäureamide |
DE102006047617B4 (de) | 2006-10-09 | 2008-11-27 | Clariant International Limited | Verfahren zur Herstellung basischer (Meth)acrylamide |
DE102008017216B4 (de) * | 2008-04-04 | 2013-08-14 | Clariant International Ltd. | Kontinuierliches Verfahren zur Herstellung von Fettsäureamiden |
DE202008004879U1 (de) | 2008-04-08 | 2008-06-05 | Basf Se | Atemluftfilter als Schutz gegen Bakterien, Viren und Pollen |
DE102009031059A1 (de) | 2009-06-30 | 2011-01-05 | Clariant International Ltd. | Vorrichtung zur kontinuierlichen Durchführung chemischer Reaktionen bei hohen Temperaturen |
DE102009042523B4 (de) * | 2009-09-22 | 2012-02-16 | Clariant International Ltd. | Vorrichtung und Verfahren zur kontinuierlichen Durchführung heterogen katalysierter chemischer Reaktionen bei hohen Temperaturen |
DE102009042522A1 (de) | 2009-09-22 | 2011-04-07 | Clariant International Ltd. | Kontinuierliches Umesterungsverfahren |
DE102010056565A1 (de) | 2010-12-30 | 2012-07-05 | Clariant International Ltd. | Verfahren zur Modifizierung Hydroxylgruppen tragender Polymere |
DE102010056564A1 (de) | 2010-12-30 | 2012-07-05 | Clariant International Limited | Hydroxylgruppen und Estergruppen tragende Polymere und Verfahren zu ihrer Herstellung |
DE102012005630A1 (de) * | 2012-03-22 | 2013-09-26 | Mann + Hummel Gmbh | Verfahren zur Herstellung eines Filterelements |
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DE202022107130U1 (de) | 2022-12-21 | 2023-01-19 | Basf Se | Filtermedium aus einem offenzelligen Melamin-Formaldehyd-Schaumstoff zur Wasserreinigung |
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DE102004034604A1 (de) * | 2004-07-16 | 2006-02-16 | Basf Ag | Modifizierte offenzellige Schaumstoffe und Verfahren zu ihrer Herstellung |
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- 2007-03-23 CN CN2007800158140A patent/CN101437595B/zh not_active Expired - Fee Related
- 2007-03-23 WO PCT/EP2007/052782 patent/WO2007110384A2/de active Application Filing
- 2007-03-23 US US12/294,813 patent/US20100173107A1/en not_active Abandoned
- 2007-03-23 BR BRPI0709247-4A patent/BRPI0709247A2/pt not_active IP Right Cessation
- 2007-03-23 JP JP2009502042A patent/JP2009531495A/ja active Pending
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US4929969A (en) * | 1989-08-25 | 1990-05-29 | Eastman Kodak Company | Ink supply construction and printing method for drop-on-demand ink jet printing |
CN1280054A (zh) * | 1999-07-07 | 2001-01-17 | 中国科学院长春应用化学研究所 | 聚烯烃泡沫塑料管材的制造方法 |
EP1334757A1 (en) * | 2002-01-25 | 2003-08-13 | Inoac Corporation | Fluid filter |
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EP2001575A2 (de) | 2008-12-17 |
CN101437595A (zh) | 2009-05-20 |
US20100173107A1 (en) | 2010-07-08 |
BRPI0709247A2 (pt) | 2011-07-12 |
KR20090007370A (ko) | 2009-01-16 |
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