CN113439097A - 适于制造具有减少的醛排放的泡沫的反应混合物 - Google Patents
适于制造具有减少的醛排放的泡沫的反应混合物 Download PDFInfo
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Abstract
所公开的是用于制造聚氨酯泡沫的反应混合物,该混合物可通过使多官能异氰酸酯与异氰酸酯反应性化合物在清除剂和至少一种催化剂的存在下反应而获得;并且固化这样的反应混合物能够提供具有减少的醛排放的泡沫,特别可用于交通工具,例如汽车的内饰件。
Description
技术领域
本发明涉及制造具有减少的醛排放的聚氨酯(硬质或软质)泡沫,更特别地涉及可用于交通工具如汽车的内饰件的聚氨酯(PU)泡沫。
背景技术
甲醛和乙醛的排放会引起令人不快的气味和健康相关的问题。通过使用清除剂添加剂来减少聚氨酯或聚脲组合物中的甲醛排放的方法是本领域已知的。
US20160304686公开了酸性化合物在聚氨酯中作为醛清除剂的用途。但是这些化合物仅对于减少甲醛排放起作用。
WO2017207687公开了醛清除剂(胺化合物)用于减少PU泡沫中的醛排放的用途。但是一些胺化合物可能导致PU泡沫的强烈颜色变化。
US2009326089公开了含有至少一个碳酰胺基团和一个腈基团的化合物在聚氨酯中作为醛清除剂的用途。但是这些化合物仅对于减少甲醛排放起作用。
US20060141236公开了肼化合物在聚氨酯中作为醛清除剂的用途。但是这些组合物的粘度非常高。
然而,已知的解决方案不能提供可有效减少甲醛、乙醛和丙醛排放的PU泡沫。
因此,需要提供适于用简单、成本有效和改进的方法制造PU泡沫的反应混合物。
发明内容
现在已经令人惊讶地发现,本发明的反应混合物能够提供具有若干优点的泡沫,所述优点包括但不限于:(1)减少的醛排放,特别是甲醛、乙醛和丙醛排放;(2)成本低;和(3)对泡沫的机械性能没有明显影响。
本发明涉及适用于制造PU泡沫的反应混合物,以及通过使用本发明的反应混合物制造PU泡沫的方法。
本发明涉及:
用于制造聚氨酯泡沫的反应混合物,其中所述混合物可通过使多官能异氰酸酯与异氰酸酯反应性化合物在清除剂和至少一种催化剂的存在下反应而获得,其中所述清除剂包含下式(I)的化合物:
其中,
R1和R2彼此独立地选自-OR3、R4,或选自羟基基团、醚基团、卤素基团、羰基基团、羧基基团、异氰酸酯基团、硝基基团和/或胺基团,
R3和R4彼此独立地选自直链、支链、饱和、不饱和、环状和/或非环状碳链、脂族烃、芳脂族烃、芳族烃及其混合的组合,任选被一个或多个氧原子、氮原子和/或硫原子间断,并且任选包含选自羟基基团、醚基团、卤素基团、羰基基团、羧基基团、异氰酸酯基团、硝基基团和/或胺基团的任何官能团,
R1和R2可以彼此连接,基本上形成至少一个环结构,优选至少2环结构。
在另一个实施方案中,本公开提供了制备泡沫组合物的方法。
在又另一个实施方案中,本公开提供了使用泡沫组合物形成交通工具的内饰件的方法。
有利地,当在含水条件下加入到反应混合物中时,所述清除剂主要含有所述式(I)的化合物。
这是有利的,因为可以将清除剂(优选以固体形式存在)在含水条件下加入到反应混合物中,在那里清除剂主要含有式(I)的化合物。已经观察到式(I)的化合物在最终组合物中是稳定的,并且与醛具有足够的反应性。
更有利地,所述清除剂在18至45℃的温度下加入到反应混合物中。
在本发明的一个优选实施方案中,R1为-OR3,其能够提高最终组合物在醛排放减少方面的效率。
根据本发明的一个具体实施方案,所述清除剂由基于所述清除剂的总重量计至少90重量%、优选至少95重量%、更优选约99重量%的所述式(I)的化合物组成。
优选地,R1和R2彼此连接形成5至12元环结构,并包含不饱和度、芳环和/或杂原子,优选至少2个环结构。
更优选地,所述清除剂具有至多3000 g/mol、优选低于1500 g/mol、更优选低于500 g/mol的分子量。
此外,反应混合物可以包含发泡剂。
多官能异氰酸酯优选选自聚合的亚甲基二苯基二异氰酸酯、亚甲基二苯基二异氰酸酯异构体混合物,或它们的混合物。
异氰酸酯反应性化合物有利地为多官能多元醇或多官能胺,优选多官能多元醇,和更优选聚醚多元醇。
在一个优选的实施方案中,反应混合物可以包含扩链剂和/或交联剂。
本申请中将详细描述本发明的反应混合物的具体实施方案。
本发明还涉及:
用于制造聚氨酯泡沫的方法,其包括以下步骤:
i. 提供包含多官能异氰酸酯和异氰酸酯反应性化合物的反应混合物;
ii. 将清除剂和至少一种催化剂加入到所述反应混合物中,最终连同至少一种发泡剂一起加入;
其中所述清除剂包含下式(I)的化合物:
其中,
R1和R2彼此独立地选自-OR3、R4,或选自羟基基团、醚基团、卤素基团、羰基基团、羧基基团、异氰酸酯基团、硝基基团和/或胺基团,
R3和R4彼此独立地选自直链、支链、饱和、不饱和、环状和/或非环状碳链、脂族烃、芳脂族烃、芳族烃及其混合的组合,任选被一个或多个氧原子、氮原子和/或硫原子间断,并且任选包含选自羟基基团、醚基团、卤素基团、羰基基团、羧基基团、异氰酸酯基团、硝基基团和/或胺基团的任何官能团,
R1和R2可以彼此连接,基本上形成至少一个环结构,优选至少2环结构;
iii. 固化所述反应混合物,导致形成聚氨酯泡沫,所述反应混合物至少包含所述多异氰酸酯和所述异氰酸酯反应性化合物在所述清除剂和所述至少一种催化剂存在下的反应产物。
优选地,当在含水条件下加入到反应混合物中时,所述清除剂主要含有所述式(I)的化合物。
更优选地,所述反应混合物具有约0.6至约1.5、优选约0.8至约1.3范围内的NCO指数。
有利地,反应混合物的NCO指数在约1.05至约10、优选约1.05至约4的范围内。
上文对于反应混合物所述的所有技术特征也可与对于本发明的方法所述的前述技术特征组合。
此外,本发明还涉及使用通过使用本发明的反应混合物获得的泡沫以形成交通工具的内饰件的方法。
具体实施方式
如果在本文中出现,术语“包含”及其派生词不意在排除任何附加组分、步骤或程序的存在,无论其是否在本文中公开。为了避免任何疑问,除非相反地说明,否则本文中通过使用术语“包含”要求保护的所有组合物可以包含任何另外的添加剂、助剂或化合物。相比之下,如果在本文中出现,术语“基本上由……组成”排除任何随后记述任何其它组分、步骤或程序的范围,排除对可操作性不重要的那些,并且如果使用的话,术语“由……组成”排除没有具体描绘或列出的任何组分、步骤或程序。除非另有说明,否则术语“或”是指单独的以及以任何组合形式列出的成员。
冠词“一种”和“一个”在本文中用于指一种或多于一种/一个或多于一个(即至少一种/至少一个)的冠词语法对象。例如,“一种树脂”是指一种树脂或多于一种树脂。
短语“在一个实施方案中”、“根据一个实施方案”等通常意味着该短语之后的特定特征、结构或特性被包括在本发明的至少一个实施方案中,并且可以被包括在本发明的多于一个实施方案中。重要的是,这些短语不一定是指同一实施方案。
如果说明书陈述组分或特征“可以”、“能够”或“可能”被包括或具有特性,则该特定组分或特征不需要被包括或具有该特性。
在本发明的上下文中,表述“反应混合物”应理解为其中多官能异氰酸酯与异氰酸酯反应性化合物反应的混合物。该步骤可以根据若干实施方案来进行。
在这种情况下,可以引用以下选项而不限于此:
- 提供水溶液中的清除剂,将其加入到异氰酸酯反应性化合物中,然后将其与多官能异氰酸酯混合;或
- 提供水溶液中的清除剂并将其加入到反应混合物中,所述反应混合物可包含多官能异氰酸酯和异氰酸酯反应性化合物;或
- 将清除剂与异氰酸酯反应性化合物混合,最终处于含水条件下;然后将其加入到多官能异氰酸酯中。
根据一个实施方案,多官能异氰酸酯包括由式Q(NCO)n表示的那些,其中n是2-5、优选2-3的数,Q是含有2-18个碳原子的脂族烃基团、含有5-10个碳原子的脂环族烃基团、含有8-13个碳原子的芳脂族烃基团、或含有6-15个碳原子的芳族烃基团,其中芳族烃基团通常是优选的。
多官能异氰酸酯的实例包括但不限于亚乙基二异氰酸酯;1,4-四亚甲基二异氰酸酯;1,6-六亚甲基二异氰酸酯;1,12-十二烷二异氰酸酯;环丁烷-1,3-二异氰酸酯;环己烷-1,3-和-1,4-二异氰酸酯,和这些异构体的混合物;异佛尔酮二异氰酸酯;2,4-和2,6-六氢甲苯二异氰酸酯和这些异构体的混合物;二环己基甲烷-4,4'-二异氰酸酯(氢化MDI或HMDI);1,3-和1,4-亚苯基二异氰酸酯;2,4-和2,6-甲苯二异氰酸酯和这些异构体的混合物(TDI);二苯基甲烷-2,4'-和/或-4,4'-二异氰酸酯(MDI);亚萘基-1,5-二异氰酸酯;三苯基甲烷-4,4',4''-三异氰酸酯;可通过苯胺与甲醛缩合,然后光气化而获得的类型的多苯基多亚甲基多异氰酸酯(聚合MDI);降冰片烷二异氰酸酯;间-和对-异氰酸根合苯基磺酰基异氰酸酯;全氯芳基多异氰酸酯;含有碳二亚胺基团、氨基甲酸酯基团、脲基甲酸酯基团、异氰脲酸酯基团、脲基团或缩二脲基团的改性多官能异氰酸酯;通过调聚反应获得的多官能异氰酸酯;含有酯基团的多官能异氰酸酯;和含有聚合脂肪酸基团的多官能异氰酸酯。本领域技术人员将认识到,也可以使用上述多官能异氰酸酯的混合物,优选使用聚合MDI的混合物和MDI异构体的混合物。
在另一个实施方案中,MDI预聚物也可用作MDI的替代物。MDI的预聚物通过过量的上述多官能异氰酸酯(如MDI)与多官能多元醇的反应来制备。预聚物优选具有10-30重量%的NCO值。MDI预聚物的合成方法是本领域已知的(参见例如Polyurethanes Handbook 第2版,G. Oertel,1994)。
适用于本公开的异氰酸酯反应性组合物可包含多官能多元醇或多官能胺。
用于本公开的多官能多元醇可以包括但不限于聚醚多元醇、聚酯多元醇、生物可再生多元醇、聚合物多元醇、不易燃多元醇如含磷多元醇或含卤素多元醇。这些多元醇可以单独使用或以混合物形式的合适组合使用。
用于本公开的多官能多元醇的一般官能度为2至6。多元醇的分子量可以为200至10,000,优选400至7,000。
分子量(MW)是重均分子量,其通过凝胶渗透色谱(GPC)方法以聚苯乙烯为参比来限定。
所述多官能多元醇的比例通常为基于反应混合物的总重量计10重量%至90重量%,优选30%至80%。
用于本公开的聚醚多元醇包括氧化亚烷基聚醚多元醇,例如氧化亚乙基聚醚多元醇和氧化亚丙基聚醚多元醇,以及衍生自多羟基化合物的具有端羟基基团的氧化亚乙基和氧化亚丙基的共聚物,所述多羟基化合物包括二醇和三醇;例如乙二醇、丙二醇、1,3-丁二醇、1,4-丁二醇、1,6-己二醇、新戊二醇、二乙二醇、二丙二醇、季戊四醇、甘油、双甘油、三羟甲基丙烷和类似的低分子量多元醇。
用于本公开的聚酯多元醇包括但不限于通过使二羧酸与过量的二醇反应,例如己二酸与乙二醇或丁二醇反应,或内酯与过量的二醇反应,例如己内酯与丙二醇反应而制备的那些。此外,用于本公开的聚酯多元醇还可以包括:具有端羟基基团的直链或轻度支化的脂族(主要是己二酸酯)多元醇;低分子量芳族聚酯;聚己内酯;聚碳酸酯多元醇。那些具有端羟基基团的直链或轻度支化的脂族(主要是己二酸酯)多元醇通过使二羧酸与过量的二醇、三醇及其混合物反应来制备;那些二羧酸包括但不限于例如己二酸、AGS混合酸;那些二醇、三醇包括但不限于例如乙二醇、二乙二醇、丙二醇、二丙二醇、1,4-丁二醇、1,6-己二醇、甘油、三羟甲基丙烷和季戊四醇。那些低分子量芳族聚酯包括衍生自对苯二甲酸二甲酯(DMT)生产的工艺残余物(通常称为DMT釜脚(still bottoms))的产物,衍生自再循环的聚(对苯二甲酸乙二醇酯) (PET)瓶或磁带的醇解(glycolysis)以及随后用二酸再酯化或与环氧烷反应的产物,和通过邻苯二甲酸酐的直接酯化(directed esterification)衍生的产物。聚己内酯通过在引发剂和催化剂存在下使己内酯开环而制备。引发剂包括乙二醇、二乙二醇、丙二醇、二丙二醇、1,4-丁二醇、1,6-己二醇、甘油、三羟甲基丙烷和季戊四醇。聚碳酸酯多元醇衍生自碳酸,其可以通过二醇与光气的缩聚产生,通过二醇(通常是己二醇)与碳酸酯(例如碳酸二苯酯)的酯交换产生。
适用于本公开的生物可再生多元醇包括蓖麻油、向日葵油、棕榈仁油、棕榈油、芥花油、菜籽油、大豆油、玉米油、花生油、橄榄油、藻油、及其混合物。
多官能多元醇的实例还包括但不限于接枝多元醇或聚脲改性多元醇。接枝多元醇包括三元醇,其中乙烯基单体接枝共聚。合适的乙烯基单体包括例如苯乙烯或丙烯腈。聚脲改性多元醇是含有通过二胺和二异氰酸酯在多元醇存在下反应形成的聚脲分散体的多元醇。聚脲改性多元醇的变体是多异氰酸酯加成聚合(PIPA)多元醇,其通过异氰酸酯和链烷醇胺在多元醇中的原位反应形成。
不易燃多元醇可以是例如通过将环氧烷加成到磷酸化合物上可得到的含磷多元醇。含卤素的多元醇可以是例如通过表氯醇或三氯环氧丁烷的开环聚合可获得的那些。
用于本公开的多官能胺可以包括聚醚多胺或聚酯多胺。
在一个优选的实施方案中,异氰酸酯反应性组合物是聚醚多元醇。
在本公开中,为了加速多官能异氰酸酯和多官能多元醇之间的反应,可以使用催化剂,例如胺催化剂,例如N,N-二甲基乙醇胺、N,N-二甲基-N',N'-二(2-羟丙基)-1,3-丙二胺、2-((2-(2-(二甲基氨基)乙氧基)乙基)甲基氨基)乙醇、二甲基环己基胺和三亚乙基二胺。
在一个实施方案中,存在于组合物中的催化剂的比例为基于反应混合物的总重量计0.001至10重量%,优选0.1至5重量%。
发现在本公开的反应混合物中添加清除剂可以减少最终产物中的醛排放,所述最终产物可以是硬质或软质泡沫。
本发明的清除剂优选由式(I)的化合物组成,其可以是例如但不限于:
4-羟基香豆素 (CAS登记号:1076-38-6),
2-羟基-1,4-萘醌 (CAS登记号:83-72-7),
4-羟基-6-甲基-2-吡喃酮 (CAS登记号:675-10-5),和
4-羟基-2,5-二氢呋喃-2-酮 (CAS登记号:541-57-1)。
应注意的是,清除剂优选以固体形式提供,并且可以主要含有式(I)的化合物。当清除剂处于含水条件下时,在反应混合物中清除剂优选主要含有式(I)的化合物。已经观察到,这种式(I)的化合物相对于已知的清除剂更稳定,并且与醛具有足够的反应性。这在本发明的情况中是特别有利的,因为可以保证醛排放的减少。
根据本发明的一个优选实施方案,清除剂以基于反应混合物的总重量计约0.001至约10、优选约0.01至约5、更优选约0.05至约2重量百分比的量存在于反应混合物中。
异氰酸酯指数或NCO指数或指数是存在于配制物中的NCO基团与异氰酸酯反应性氢原子的比率。
[NCO]
[活性氢]
换句话说,NCO指数表示相对于与配制物中所用的异氰酸酯反应性氢的量反应理论上所需的异氰酸酯的量,配制物中实际使用的异氰酸酯的量。
在另一个实施方案中,反应混合物可以进一步任选地包含阻燃剂、抗氧化剂、表面活性剂、物理或化学发泡剂、扩链剂、交联剂、泡沫稳定剂、填料、颜料或任何其它用于PU材料的典型添加剂。
所公开的组合物的优点可以包括:(1)减少的醛排放,特别是甲醛、乙醛和丙醛排放;(2)成本低;和(3)对反应混合物固化后获得的最终泡沫的机械性能没有明显影响。
此外,本公开还提供了使用泡沫组合物形成交通工具的内饰件,优选汽车的内饰包覆件,例如车顶包覆件、地毯背衬泡沫、车门包覆件、转向环、操控旋钮和座垫的方法。
本公开的实施方案也可以应用于使用PU泡沫的其它工业领域。PU泡沫包括软质PU泡沫、半硬质PU泡沫、硬质PU泡沫、粘弹性PU泡沫、整皮PU泡沫、水培PU泡沫等。
现在接下来的实施例应被认为是本公开的示例,而不是以任何方式限制本公开。
原材料
多官能异氰酸酯:SUPRASEC® 7007 (聚合MDI)。供应商:Huntsman Corporation,USA;
多元醇A:衍生自甘油的具有端羟基基团的氧化亚乙基和氧化亚丙基的三官能共聚物;具有大约5,000的分子量;
多元醇B:三官能基于乙二醇的聚醚多元醇;具有大约1300的分子量;
泡沫稳定剂:TEGOSTAB® B8734 LF2聚合物添加剂 (基于硅氧烷的表面活性剂)。供应商:Evonik;
催化剂A:JEFFCAT® ZF 10催化剂 (胺催化剂)。供应商:Huntsman Corporation,USA;
催化剂B:JEFFCAT® DPA催化剂 (胺催化剂)。供应商:Huntsman Corporation,USA;
催化剂C:二甲基乙醇胺
清除剂A:4-羟基香豆素;
清除剂B:2-羟基-1,4-萘醌;
清除剂C:4-羟基-6-甲基-2-吡喃酮
清除剂D:4-羟基-2,5-二氢呋喃-2-酮
扩链剂:二乙醇胺
实施例1-5:
实施例1-5是用多官能异氰酸酯作为A组分制备的。实施例1-5的B组分示于表1中。表1中列出的所有值均是指B组分的重量份。实施例5是不包含醛清除剂的对比例。
表1
程序
对于实施例1-5,将A和B组分以A:B=67.4:100的比例(按重量计)和以1的NCO指数混合并在聚乙烯容器中搅拌以制备聚氨酯泡沫。将所得泡沫组合物快速倒入聚乙烯袋中。发泡反应进行,使泡沫自由起发。在进行测试之前,在室温下将泡沫固化最少15分钟,对于每种配制物,经由手动混合泡沫程序制备约1千克(kg)的泡沫用于微仓分析(micro-scalechamber analysis)或VDA276排放测试。在测试过程中测试仓的温度为65℃。VDA276(2005版)是来自Verband der Automobilindustrie (网站:https://www.vda.de/de)的测试方法。
结果
甲醛减少和机械性能
表2
实施例 | 1 | 2 | 3 | 4 | 5 |
甲醛排放<sup>1)</sup> [μg/m<sup>2</sup>.h] | 18 | 33 | 10 | 15 | 198 |
芯密度 <sup>2)</sup> [kg/m<sup>3</sup>] | 45 | 46 | 50 | 43 | 50 |
40% CLD <sup>2)</sup> [kPa] | 5.7 | 6.0 | 7.6 | 5.4 | 7.0 |
磁滞损耗CLD <sup>2)</sup> | 28 | 30 | 29 | 29 | 30 |
断裂拉伸强度 <sup>2)</sup> | 105 | 111 | 166 | 116 | 152 |
断裂伸长率<sup>2)</sup> | 76% | 75% | 97% | 74% | 82% |
50%压缩永久变形 <sup>2)</sup> | 13% | 9% | 13% | 13% | 10% |
1) 根据ISO 12219-3:2012通过微仓分析测试
2) 根据TL526 53在23℃和50%相对湿度下测试。
表2显示了根据ISO 12219-3:2012方法测试的实施例1-4的甲醛排放减少。当存在醛清除剂时(实施例1-4),与实施例5(无清除剂)相比,甲醛排放显著减少。并且对泡沫的机械性能没有明显影响。
甲醛、乙醛和丙醛减少
表3
实施例 | 1 | 3 | 5 |
甲醛排放<sup>1)</sup> [μg/m<sup>3</sup>] | 14 | 8 | 295 |
乙醛排放<sup>1)</sup> [μg/m<sup>3</sup>] | 20 | 16 | 67 |
丙醛排放<sup>1)</sup> [μg/m<sup>3</sup>] | 58 | 36 | 140 |
1) 根据VDA276测试。
表3显示了根据VDA276方法测试的实施例1、3和5的甲醛、乙醛和丙醛排放。本公开的实施例1和3显示出相对于实施例5(无醛清除剂)甲醛、乙醛和丙醛排放的减少。
Claims (14)
1.用于制造聚氨酯泡沫的反应混合物,其中所述混合物可通过使多官能异氰酸酯与异氰酸酯反应性化合物在清除剂和至少一种催化剂的存在下反应而获得,其中所述清除剂包含下式(I)的化合物:
其中,
R1和R2彼此独立地选自-OR3、R4,或选自羟基基团、醚基团、卤素基团、羰基基团、羧基基团、异氰酸酯基团、硝基基团和/或胺基团,
R3和R4彼此独立地选自直链、支链、饱和、不饱和、环状和/或非环状碳链、脂族烃、芳脂族烃、芳族烃及其混合的组合,任选被一个或多个氧原子、氮原子和/或硫原子间断,并且任选包含选自羟基基团、醚基团、卤素基团、羰基基团、羧基基团、异氰酸酯基团、硝基基团和/或胺基团的任何官能团,
R1和R2可以彼此连接,基本上形成至少一个环结构,优选至少2环结构。
2.根据权利要求1所述的反应混合物,其中当在含水条件下加入到反应混合物中时,所述清除剂主要含有所述式(I)的化合物。
3.根据权利要求1或2所述的反应混合物,其中所述清除剂在18至45℃的温度下加入到所述反应混合物中。
4.根据前述权利要求中任一项所述的反应混合物,其中R1为-OR3。
5.根据前述权利要求中任一项所述的反应混合物,其中所述清除剂由基于所述清除剂的总重量计至少90重量%、优选至少95重量%、更优选约99重量%的所述式(I)的化合物组成。
6.根据前述权利要求中任一项所述的反应混合物,其中R1和R2彼此连接以形成5至12元环结构,并且包含不饱和度、芳环和/或杂原子,优选至少2环结构。
7.根据前述权利要求中任一项所述的反应混合物,其中所述清除剂具有至多3000 g/mol、优选低于1500 g/mol、更优选低于500 g/mol的分子量。
8.根据前述权利要求中任一项所述的反应混合物,其包含发泡剂。
9.根据前述权利要求中任一项所述的反应混合物,其中所述多官能异氰酸酯选自聚合的亚甲基二苯基二异氰酸酯、亚甲基二苯基二异氰酸酯异构体混合物或它们的混合物。
10.根据前述权利要求中任一项所述的反应混合物,其中所述异氰酸酯反应性化合物为多官能多元醇或多官能胺,优选多官能多元醇,和更优选聚醚多元醇。
11.用于制造聚氨酯泡沫的方法,其包括以下步骤:
a. 提供包含多官能异氰酸酯和异氰酸酯反应性化合物的反应混合物;
b. 将清除剂和至少一种催化剂加入到所述反应混合物中,最终连同至少一种发泡剂一起加入;
其中所述清除剂包含下式(I)的化合物:
其中,
R1和R2彼此独立地选自-OR3、R4,或选自羟基基团、醚基团、卤素基团、羰基基团、羧基基团、异氰酸酯基团、硝基基团和/或胺基团,
R3和R4彼此独立地选自直链、支链、饱和、不饱和、环状和/或非环状碳链、脂族烃、芳脂族烃、芳族烃及其混合的组合,任选被一个或多个氧原子、氮原子和/或硫原子间断,并且任选包含选自羟基基团、醚基团、卤素基团、羰基基团、羧基基团、异氰酸酯基团、硝基基团和/或胺基团的任何官能团,
R1和R2可以彼此连接,基本上形成至少一个环结构,优选至少2环结构;
c. 固化所述反应混合物,导致形成聚氨酯泡沫,所述反应混合物至少包含所述多异氰酸酯和所述异氰酸酯反应性化合物在所述清除剂和所述至少一种催化剂存在下的反应产物。
12.根据权利要求11所述的方法,其中当在含水条件下加入到反应混合物中时,所述清除剂主要含有所述式(I)的化合物。
13.根据权利要求11或12中任一项所述的方法,其中,所述反应混合物具有约0.6至约1.5、优选约0.8至约1.3范围内的NCO指数。
14.根据权利要求11或12中任一项所述的方法,其中,所述反应混合物的NCO指数在约1.05至约10、优选约1.05至约4的范围内。
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