CN104937003A - 包含可持续生产的原料的湿气固化聚氨酯组合物 - Google Patents
包含可持续生产的原料的湿气固化聚氨酯组合物 Download PDFInfo
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- CN104937003A CN104937003A CN201480005795.3A CN201480005795A CN104937003A CN 104937003 A CN104937003 A CN 104937003A CN 201480005795 A CN201480005795 A CN 201480005795A CN 104937003 A CN104937003 A CN 104937003A
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Abstract
本发明描述了无溶剂的湿气固化聚氨酯组合物,所述组合物含有99.9重量%-75重量%的至少一种具有游离异氰酸酯基的聚氨酯预聚物,所述聚氨酯预聚物通过使至少一种选自聚醚多元醇和聚酯多元醇的多元醇与化学计量过量的至少一种聚异氰酸酯反应来制备,所述至少一种多元醇是再生聚对苯二甲酸乙二醇酯多元醇。另外,这种组合物还含有0.1重量%-25重量%的至少一种选自催化剂、树脂、增塑剂、填料、颜料、稳定剂、粘合促进剂和其它聚合物的添加剂。上述成分的总和是100重量%。这些组合物可以用作单组分粘合剂、反应性热熔粘合剂、涂料材料或密封剂。
Description
技术领域
本发明涉及交联的无溶剂的湿气固化聚氨酯组合物,所述聚氨酯组合物基于具有游离异氰酸酯基的聚氨酯预聚物,所述聚氨酯预聚物通过使至少一种选自聚醚多元醇、聚酯多元醇和它们的混合物的多元醇与化学计量过量的至少一种聚异氰酸酯反应来制备,本发明还涉及所述聚氨酯组合物在单组分粘合剂、反应性热熔粘合剂、涂料材料或密封剂中的用途。
背景技术
上述类型的无溶剂的湿气固化聚氨酯组合物以及其用途众所周知。通常,使用基于石油化学原料的多元醇来合成这些聚氨酯组合物。
由于化石和石油化学原料的供应是有限的,因此,理想的是,用可持续生产的产品代替至少一部分这些多元醇以节约这些资源。已知使用由可再生原料生产的多元醇。因此,对于某些粘合剂配制物,通过天然油脂或天然存在的油与含OH基的甘油三酯的酯交换获得的多元醇已经使用了很长时间。
因此,DE 44 01 572 A1描述了基于异氰酸酯组分和多元醇组分的双组分聚氨酯粘合剂,除油脂化学多元醇以外,其还含有相对于油脂化学多元醇的2-7重量%的至少一种二官能醇和/或三官能醇,并且其中所述醇或其混合物的羟值为1100-1850。这些组合物可用于胶合刚性或柔性基材,特别是塑料、金属、玻璃或特别优选木材,用于将这些基材彼此组合以及将这些基材与自身胶合。
WO2002/066572 A1也描述了聚氨酯粘合剂,其基于多元醇组分A),所述多元醇组分A)为10-98重量%的至少一种油脂化学多元醇、1-7.5重量%的至少一种羟值为400-2000的二醇和1-7.5重量%的至少一种羟值为200-2000的三官能、四官能或五官能多元醇,以及聚异氰酸酯组分B)。组分A)和组分B)的NCO/OH比率应为1.5-0.9。相对于总的多元醇混合物,向多元醇组分中加入0-60重量%的均匀溶解的树脂应实现粘合强度的大幅增加,所述粘合强度甚至在沸腾24小时和在60℃干燥7天后也基本上不会降低。所述粘合剂适于由木材制成的承载组件。
WO 2009/080740 A1公开了双组分聚氨酯粘合剂,其由以下物质组成:多元醇组分,所述多元醇组分含有2-30重量%的至少一种分子量大于1000g/mol的聚酯二醇、5-35重量%的至少一种3-14官能的多元醇、5-35重量%的疏水性多元醇、2-65重量%的其它添加剂或辅助材料,其总和应为100%,以及聚异氰酸酯交联组分,NCO/OH比率为0.9:1-1.5:1,其中交联的粘合剂具有大于50℃的玻璃化转变温度(Tg)。
EP2468789 A1描述了双组分聚氨酯组合物,其包含蓖麻油、至少一种烷氧基化的芳族二醇、至少一种具有5-8个羟基的多元醇以及至少一种聚异氰酸酯。该文献描述了这些组合物应具有长的“开放时间”,并且它们在长时间暴露于高湿度(例如,70%的相对湿度)的气候中甚至40分钟后,特别是在60分钟后应该仍能够胶合,并且能够固化而形成具有高的机械强度的聚合物,因此产生结构粘接。这些双组分聚氨酯组合物应特别适合用作结构粘合剂,特别是用于胶合风力涡轮机的转子叶片的翼半壳体。
WO 2007/027921 A1公开了用于制造具有高硬度特性的涂层的无溶剂的水性聚氨酯分散体。对于制备所述聚氨酯分散体,可使用再生PET多元醇。
US 2010/0273939 A1公开了基于脂族异氰酸酯的水性聚氨酯分散体,其形成硬质涂层并且特征在于高耐溶剂性。通过在用于制备所述分散体的多元醇配制物中使用1-8重量%的高官能的多元醇来实现所述增强的性质。
US 5319008 A描述了湿气固化的基本上无溶剂并且无水的沥青材料和液态预聚物的混合物。所述预聚物可以是例如基于再生PET的聚氨酯预聚物。
如上文作为实例示出的,对于聚氨酯粘合剂,可再生原料油脂化学醇例如蓖麻油、蓖麻油衍生物的油脂化学多元醇以及来自其它天然油(例如豆油)的酯交换产物是现有技术并且大规模使用。此类油脂化学产品可例如以商品名Sovermol或Renuva从BASF或Dow购得。所有这些多元醇的共同点是,它们具有通常不等于2的OH基官能度分布。因此,这些多元醇仅可有条件地在单组分PU预聚物中使用,因为这些多元醇由于其不利的OH官能度分布可能会导致不稳定的单组分聚氨酯预聚物。这体现在例如在单组分聚氨酯热熔粘合剂中在处理过程中粘度的快速增加,或者在单组分粘合剂和密封剂中非常有限的储存稳定性。因此,这些基于可再生原料的多元醇不能或仅可非常有限地用于单组分聚氨酯粘合剂。
另一可持续的原料来源是使用再生材料,特别是再生塑料。然而,这些大多作为不确定的颗粒存在,它们具有波动的质量和杂质。另一缺点是,它们仅可作为“填料”掺入聚氨酯预聚物中,而不作为预聚物的一部分。
一个例外是所谓的再生PET(聚对苯二甲酸乙二醇酯)。其由PET颗粒通过与二醇,例如二乙二醇的酯交换产生,并且含有末端OH基。具有各种OH值和/或分子量的此类多元醇已市售一段时间。
US 4469824教导可以将对苯二甲酸酯废料转移到液体产物中。为此,使废料或再生聚对苯二甲酸乙二醇酯(PET)与二乙二醇以及一种或多种氧化烯二醇反应,并移除一部分剩余的乙二醇。二醇与PET废料的比率应大于1.2:1,以使存在的任何二酯不会从溶液中分离出来。由此获得的液体对苯二甲酸酯可用作聚异氰尿酸酯泡沫中的多元醇增量剂组分。
WO 2006/080743 A1描述了用于制备多元醇、聚氨酯和聚氨酯泡沫的方法。为此,首先使多元醇与聚合酸(不饱和聚合脂肪酸)反应。该反应产物用于聚酯、聚酰胺和聚氨酯的解聚。随后,使解聚产物与多元酸、多元醇和胺以获得具有0.5-1mg KOH/g的酸值、10-500mg KOH/g的OH值和1-50mg KOH/g的胺值的产物的方式反应。后者应与聚醚多元醇具有良好的相容性,并且与异氰酸酯具有良好的反应性。泡沫、合成革和聚合木材的生产是可能的应用。
从JP 2002-003815已知使用再生聚对苯二甲酸乙二醇酯制备聚氨酯粘合剂的方法。为此,应使再生聚酯多元醇与有机二异氰酸酯任选地在增链反应下使用含有活性氢的低分子量化合物反应,以获得含有聚氨酯树脂的粘合剂。该文献没有公开任何基于具有游离异氰酸酯基的聚氨酯预聚物的无溶剂的湿气固化聚氨酯组合物。
发明内容
因此,本发明的目的为提供制备基于具有游离异氰酸酯基的聚氨酯预聚物的无溶剂的湿气固化聚氨酯组合物的方法,其中至少一部分所用多元醇是可持续生产的产品。
本发明的所述问题的解决方案可在权利要求书中找到。
其基本上在于提供无溶剂的湿气固化聚氨酯组合物,所述组合物含有99.9-75重量%的至少一种具有游离异氰酸酯基的聚氨酯预聚物,所述聚氨酯预聚物通过使至少一种选自聚醚多元醇、聚酯多元醇和其混合物的多元醇与化学计量过量的至少一种聚异氰酸酯反应来制备,其中至少一种多元醇是再生聚对苯二甲酸乙二醇酯(PET)。此外,这种组合物还含有0.1-25重量%的至少一种选自催化剂、树脂、增塑剂、填料、颜料、稳定剂或粘合促进剂和其它聚合物的添加剂。上述成分的总和为100重量%。
本发明的另一主题是上述聚氨酯组合物用于制备单组分粘合剂、反应性热熔粘合剂、涂料材料或密封剂的用途。
具体实施方式
作为聚醚多元醇,低分子量多官能醇与环氧烷烃的反应产物特别合适。环氧烷烃优选具有2-4个C原子。合适的是例如乙二醇、丙二醇、同分异构丁二醇、己二醇或4,4’-二羟基-二苯基丙烷与环氧乙烷、环氧丙烷、环氧丁烷或者它们中两种或更多种的混合物的反应产物。此外,多官能醇,例如甘油、三羟甲基乙烷或三羟甲基丙烷、季戊四醇或糖醇与所述环氧烷烃的反应产物以形成聚醚多元醇也是合适的。在本发明的范围内合适的其它多元醇通过使四氢呋喃聚合(聚-THF)获得。这些聚醚多元醇以本领域技术人员已知的方式制备,并且可商购。
在所提到的聚醚多元醇中,低分子量醇与环氧丙烷在形成部分仲羟基的条件下的反应产物特别合适。
例如,合适的是分子量为200-5000g/mol,优选400-4000g/mol(数均分子量MN,通过GPC根据DIN 55672-1:2007-08测量)的聚醚多元醇。在二官能聚醚多元醇的情况下,这对应于560-22mg KOH/g,优选280-28mgKOH/g的羟值(OH数,根据DIN 53240-2:2007-11测定)。优选的多元醇应每个分子具有2或3个OH基,特别合适的是羟值为20-500mg KOH/g的二醇。
在特定实施方案中,不使用聚醚多元醇。
此外,聚酯多元醇也是合适的。此类聚酯多元醇优选包含多官能醇与多官能羧酸的反应产物,多官能醇优选二官能醇,任选地与少量三官能醇一起,多官能羧酸优选二官能羧酸和/或三官能羧酸。代替游离多元羧酸,也可以使用相应的多元羧酸酐或与优选具有1-3个C原子的醇的相应的多元羧酸酯。适用于制备此类聚酯多元醇的特别是己二醇、丁二醇、丙二醇、乙二醇、1,4-羟甲基环己烷、2-甲基-1,3-丙二醇、三乙二醇、四乙二醇、聚乙二醇、二丙二醇、聚丙二醇、二丁二醇和此类醇的混合物。
根据本发明可使用的聚酯多元醇优选包含多官能醇与多官能羧酸的反应产物,多官能醇优选二官能醇,任选地与少量三官能醇一起,多官能羧酸优选二官能羧酸和/或三官能羧酸。代替游离多元羧酸,也可以使用相应的多元羧酸酐或与优选具有1-3个C原子的醇的相应的多元羧酸酯。
适用于制备此类聚酯多元醇的特别是己二醇、丁二醇、丙二醇、乙二醇、1,4-羟甲基环己烷、2-甲基-1,3-丙二醇、三乙二醇、四乙二醇、聚乙二醇、二丙二醇、聚丙二醇、二丁二醇和此类醇的混合物。
所述多元羧酸可以是脂族、脂环族、芳族或杂环的,或杂芳环的。它们可以任选地被例如烷基、烯基、醚基或卤素取代。适合作为多元羧酸的是例如琥珀酸、己二酸、辛二酸、壬二酸、癸二酸、邻苯二甲酸、间苯二甲酸、对苯二甲酸、偏苯三酸、邻苯二甲酸酐、四氢邻苯二甲酸酐、六氢邻苯二甲酸酐、戊二酸酐、马来酸、马来酸酐、富马酸、二聚脂肪酸或三聚脂肪酸或它们中两种或更多种的混合物。适合作为三元羧酸的优选为柠檬酸或偏苯三酸。所提到的酸可单独地或者作为它们中的两种或更多种的混合物使用。本领域技术人员已知此类OH官能的聚酯,并且它们可商购。特别合适的是包含两个或三个末端OH基的聚酯多元醇。
特别适合用于制备热熔粘合剂的聚酯多元醇是液态的、无定形的或结晶的共聚酯或其混合物;此类聚酯多元醇例如以名称Dynacoll由EvonikIndustries AG供应。这些聚酯多元醇优选具有10-200mg KOH/g的羟值(根据DIN 53240-2:2007-11测定)以及小于或等于4mg KOH/g,优选小于或等于2mg KOH/g的酸值(根据DIN EN ISO 2114校正1:2006-11测定)。
根据本发明可使用的来自再生聚对苯二甲酸乙二醇酯的多元醇已市售一段时间。它们通过由制备PET的残留物与低分子量二醇发生乙二醇醇解(glycolysis或者glycolisation)以及通过与二羧酸或二羧酸酐发生酯交换来制备。另一种可能是使用来自预先用过的PET材料的再生PET。从制备PET的残留物或来自预先用过的PET材料的PET制备此类多元醇的方法描述于例如文献US4469824、US4568717 A、WO2010015642 A1、EP1178062 A1、JP-A-2000-191756或JP-A-02-011625中。
合适的再生聚对苯二甲酸乙二醇酯多元醇具有40-300mg KOH/g的羟值以及小于1.0mg KOH/g,优选小于0.5mg KOH/g的酸值。优选地,它们具有小于0.1重量%的水含量和1.8-2.1的OH官能度。
合适的聚异氰酸酯可选自1,5-亚萘基二异氰酸酯,4,4’-二苯基甲烷二异氰酸酯(MDI)、2,4’-二苯基甲烷二异氰酸酯、2,2’-二苯基甲烷二异氰酸酯、氢化或部分氢化的MDI(H12MDI、H6MDI)、苯二甲基二异氰酸酯(XDI)、四甲基苯二甲基二异氰酸酯(TMXDI)、二亚烷基二苯基甲烷二异氰酸酯和四亚烷基二苯基甲烷二异氰酸酯、4,4’-二苄基二异氰酸酯、1,3-亚苯基二异氰酸酯、1,4-亚苯基二异氰酸酯、甲代亚苯基二异氰酸酯(TDI)的同分异构体、1-甲基-2,4-二异氰酸根环己烷、1,6-二异氰酸根-2,2,4-三甲基己烷、1,6-二异氰酸根-2,4,4-三甲基己烷、1-异氰酸根甲基-3-异氰酸根-1,5,5-三甲基环己烷(IPDI)、氯化和溴化的二异氰酸酯、磷二异氰酸酯、四甲氧基丁烷-1,4-二异氰酸酯、萘-1,5-二异氰酸酯(NDI)、丁烷-1,4-二异氰酸酯、己烷-1,6-二异氰酸酯(HDI)、二环己基甲烷二异氰酸酯、四亚甲基-、六亚甲基-、十一烷基-、十二亚甲基-、2,2,4-三甲基己烷-2,3,3-三甲基-六亚甲基二异氰酸酯、环己烷-1,4-二异氰酸酯、亚乙基二异氰酸酯、亚甲基三苯基三异氰酸酯(MIT)、邻苯二甲酸双-异氰酸根乙基酯、具有反应性卤素原子的二异氰酸酯,例如1-氯甲基苯基-2,4-二异氰酸酯、1-溴甲基苯基-2,6-二异氰酸酯、3,3-双-氯甲基醚-4,4’-二苯基二异氰酸酯。其它可用的二异氰酸酯是三甲基六亚甲基二异氰酸酯、1,4-二异氰酸根丁烷、1,12-二异氰酸根十二烷和二聚脂肪酸二异氰酸酯、赖氨酸二异氰酸酯、4,4-二环己基甲烷二异氰酸酯、1,3-环己烷二异氰酸酯或1,4-环己烷二异氰酸酯。
其它合适的异氰酸酯是具有低的单体二异氰酸酯含量的高分子量二异氰酸酯。在第一步骤中,使平均分子量(根据DIN 55672-1:2007-08测定的数均MN)小于2000g/mol,特别是小于1500g/mol的二醇组分与化学计量过量很多的分子量小于500g/mol的单体二异氰酸酯反应,以形成高分子量二异氰酸酯。此反应后,任选地通过加入非溶剂使所述高分子量二异氰酸酯从反应混合物中沉淀,并通过过滤或离心使其不含任何未反应的二异氰酸酯。此类高分子量二异氰酸酯的制备描述于例如文献EP1237971 A1中。
特别适合用于制备反应性热熔粘合剂的是选自以下的聚异氰酸酯:4,4’-二苯基甲烷二异氰酸酯、2,4’-二苯基甲烷二异氰酸酯、2,2’-二苯基甲烷二异氰酸酯、所述同分异构体在有或没有其更高官能同系物的情况下的混合物,以及上述高分子量二异氰酸酯。
特别优选的聚氨酯组合物的特征在于,所述一种或多种预聚物具有小于5重量%,优选小于1重量%,特别优选小于0.5重量%的单体二异氰酸酯含量。
可使各种多元醇分别与相应的二异氰酸酯反应,然后可在随后的步骤中适当地混合。然而,在许多情况下,更经济的是将待使用的多元醇预先以适当的比率混合,随后使该混合物与二异氰酸酯化合物反应。
作为催化剂,可使用可催化异氰酸酯反应的所有已知化合物。这些催化剂的实例是钛酸酯,例如钛酸四丁酯和钛酸四丙酯;锡羧酸盐,例如二丁基二月桂酸锡(DBTL)、二丁基二乙酸锡、辛酸锡;锡氧化物,例如氧化二丁基锡和氧化二辛基锡;有机铝化合物,例如三乙酰丙酮铝、三(乙基乙酰乙酸基)铝;螯合物,例如四乙酰丙酮钛;胺化合物,例如三亚乙基二胺、胍、二苯基胍、2,4,6-三(二甲基氨基甲基)苯酚、吗啉、N-甲基吗啉、2-乙基-4-甲基咪唑和1,8-二氮杂双环-(5,4,0)-十一碳烯-7(DBU)、1,4-二氮杂双环[2,2,2]辛烷、N,N-二甲基哌嗪、1,8-二氮杂双环[5.4.0]十一碳-7-烯、二吗啉基二甲基醚、二吗啉基二乙基醚(DMDEE)或它们的混合物。相对于组合物的总重量,催化剂优选以0.01-约5重量%的量使用。
作为增粘树脂,可使用例如松香酸、松香酸酯、萜烯树脂、萜烯酚树脂、苯酚改性的苯乙烯聚合物、苯酚改性的α-甲基苯乙烯聚合物或烃树脂、妥尔油树脂、松香树脂、季戊四醇松香树脂或芳族改性的烃树脂。这些增粘树脂以5-30重量%的量使用。
在特殊组合物中,还可加入特别是增塑剂。这些是非反应性增塑剂,例如环烷烃矿物油、聚丙烯、聚丁烯、聚异丁烯、聚异戊二烯低聚物、氢化聚异戊二烯和/或聚丁二烯低聚物、苯甲酸酯、邻苯二甲酸酯、己二酸酯或烃油。
也可以包含少量颜料和填料。
如果需要,优选可使用有机官能硅烷,例如羟基官能硅烷、(甲基)丙烯酰氧基官能硅烷、巯基官能硅烷、氨基官能硅烷或环氧基官能硅烷作为粘合促进剂。相对于混合物,它们的量可为0-10重量%,优选0-5重量%。
作为稳定剂,可使用例如抗氧化剂,例如市售的位阻酚和/或硫醚和/或取代的苯并三唑或HALS型位阻胺。此类稳定剂例如以名称Irganox由BASF出售。
本发明的另一实施方案也可含有一定比例的不具有其它官能团的其它聚合物作为添加剂。这些可以是影响例如对于热熔粘合剂重要的性质,例如粘合性、强度和温度特性的合成聚合物。此类聚合物可以是例如缩聚物,例如(共)聚酰胺、聚酰胺/EVA共聚物、聚醚酰胺、聚醚酯酰胺;聚合产物,例如聚乙烯吡咯烷酮、聚乙基噁唑啉、聚乙烯基甲基醚、乙烯、乙烯/乙酸乙烯酯、乙烯/丙烯酸酯、丙烯、(甲基)丙烯酸酯共聚物。此外,也可使用基本上无定形的聚烯烃,例如无规聚丙烯、无规聚-1-丁烯、乙烯-丙烯共聚物、乙烯-1-丁烯共聚物、乙烯-丙烯-1-丁烯三元共聚物、丙烯-1-丁烯共聚物、乙烯-丙烯-1-己烯三元共聚物、乙烯-丙烯-1-辛烯三元共聚物、乙烯-1-丁烯-1-己烯三元共聚物、乙烯-1-丁烯-1-辛烯三元共聚物、乙烯-1-己烯-1-辛烯三元共聚物、丙烯-1-丁烯-1-己烯三元共聚物、丙烯-1-丁烯-1-辛烯三元共聚物或丙烯-1-己烯-1-辛烯三元共聚物。特别合适的是选自聚(甲基)丙烯酸酯和其共聚物的聚合物。这些是例如烯键式不饱和化合物的共聚物,所述烯键式不饱和化合物例如(甲基)丙烯酸的C1-C18烷基酯;(甲基)丙烯酸;(甲基)丙烯酸与乙二醇醚,例如甲氧基乙醇和/或乙氧基乙醇的酯;乙烯基酯,例如乙酸乙烯酯、丙酸乙烯酯;支化一元羧酸的乙烯基酯。此类(甲基)丙烯酸酯尤其应具有小于60,000g/mol,特别是10,000-40,000g/mol的平均分子量(MN)。此类其它聚合物的含量可以为0-20重量%,特别是5-15重量%。总之,粘合剂中应包含小于25重量%的添加剂。
如在以下实施例中更详细地进行说明,本发明的聚氨酯组合物的特别优选的用途是反应性单组分粘合剂或热熔粘合剂。使用Brookfield DV II+型旋转粘度计使用27号转子在5rpm测定粘度。
实施例1:(根据本发明)
使用以下基本组成(数据按重量百分比计)配制单组分热熔粘合剂:
21.18% Dynacoll 7130
12.70% PET多元醇,OH值:65,在70℃的粘度:3350mPa*s(PETOPUROL 70,PETOPUR GmbH Schwarzheide)
25.32% Dynacoll 7360
25.32% Dynacoll 7380
15.28% Desmodur 44M(4,4’-二苯基甲烷二异氰酸酯(MDI),Bayer)
0.2% Irganox 1010
首先将聚酯多元醇置于玻璃烧瓶中,并在130℃熔融。然后,施加<50毫巴的真空,并将混合物在搅拌下干燥1.5小时。用氮气停止真空,并加入Desmodur 44M。施加真空,并将温度保持在123℃-130℃。反应时间为45分钟。
在130℃的粘度:22,000mPa*s
在130℃ 16h后:61,000mPa*s
粘度增加:177%
比较例2(不是本发明):
使用以下基本组成(数据按重量百分比计)配制热熔粘合剂:
21.18% Dynacoll 7130
11.70% Sovermol 1005(BASF)
25.32% Dynacoll 7360
25.32% Dynacoll 7380
16.28% Desmodur 44M
0.2% Irganox 1010(稳定剂,BASF)
按照实施例1制备
在130℃的粘度:25,000mPa*s
在130℃ 16h后:253,000mPa*s
粘度增加:912%
实施例3(根据本发明):
使用以下基本组成(数据按重量百分比计)配制单组分粘合剂:
19.45% Desmodur VKS 20(4,4’-二苯基甲烷二异氰酸酯(MDI)与同分异构体和更高官能同系物(PMDI)的混合物,Bayer)
24.80% Desmodur 44M
25.00%聚丙二醇2000
30.45% PET多元醇,OH值:65,在70℃的粘度:3350mPa*s(PETOPUROL 70,PETOPUR GmbH Schwarzheide)
0.20% DMDEE
将异氰酸酯在搅拌下置于玻璃烧瓶中,并加热到70℃。然后,加入多元醇,使其在70℃反应30分钟。然后,加入DMDEE,进行均质化10分钟。
在20℃的粘度:45,100mPa*s
在40℃4周后:52,300mPa*s(在20℃测量)
粘度增加:16%
比较例4(不是本发明)
使用以下基本组成(数据按重量百分比计)配制单组分粘合剂:
19.45% Desmodur VKS 20
24.80% Desmodur 44M
25.00%聚丙二醇2000
30.45% Renuva DWD 2007.01(Dow)
0.20% DMDEE
按照实施例3制备
在20℃的粘度:28,800mPa*s
在40℃ 4周后:82,300mPa*s(在20℃测量)
粘度增加:186%
从上述实施例清楚可见,仅本发明的含有PET多元醇作为可持续组分的组合物具有足够的粘度稳定性。
Claims (12)
1.无溶剂的湿气固化聚氨酯组合物,其中所述组合物含有以下组分:
a)99.9-75重量%的至少一种具有游离异氰酸酯基的聚氨酯预聚物,所述聚氨酯预聚物通过使至少一种选自聚醚多元醇和聚酯多元醇的多元醇与化学计量过量的至少一种聚异氰酸酯反应来制备,其中所述至少一种多元醇是再生聚对苯二甲酸乙二醇酯多元醇,以及
b)0.1-25重量%的至少一种选自催化剂、树脂、增塑剂、填料、颜料、稳定剂、粘合促进剂和其它聚合物的添加剂,
其中a)和b)的总和为100重量%。
2.根据权利要求1所述的聚氨酯组合物,其特征在于使用聚丙二醇、聚四亚甲基乙二醇、和/或环氧乙烷与环氧丙烷的统计共聚物和/或嵌段共聚物作为聚醚多元醇。
3.根据权利要求1或2所述的聚氨酯组合物,其特征在于使用液态的、无定形的或结晶的共聚酯作为聚酯多元醇。
4.根据前述权利要求中至少一项所述的聚氨酯组合物,其特征在于所述再生聚对苯二甲酸乙二醇酯通过将聚对苯二甲酸乙二醇酯废料进行乙二醇醇解或通过使聚对苯二甲酸乙二醇酯废料与二羧酸进行酯交换来制备。
5.根据权利要求4所述的聚氨酯组合物,其特征在于所述再生聚对苯二甲酸乙二醇酯多元醇具有40-300mg KOH/g的羟值以及小于1.0mgKOH/g,优选小于0.5mg KOH/g的酸值。
6.根据前述权利要求中至少一项所述的聚氨酯组合物,其特征在于所述一种或多种液态的、无定形的或结晶的共聚酯具有10-200mg KOH/g的羟值。
7.根据前述权利要求中至少一项所述的聚氨酯组合物,其特征在于所述一种或多种聚醚多元醇具有20-500mg KOH/g的羟值。
8.根据前述权利要求中至少一项所述的聚氨酯组合物,其特征在于所述聚异氰酸酯选自4,4’-二苯基甲烷二异氰酸酯、2,4’-二苯基甲烷二异氰酸酯或者所述同分异构体在有或没有其更高官能同系物的情况下的混合物。
9.根据前述权利要求中至少一项所述的聚氨酯组合物,其特征在于所述一种或多种预聚物具有小于5重量%,优选小于1重量%,特别优选小于0.5重量%的单体二异氰酸酯含量。
10.根据前述权利要求中至少一项所述的聚氨酯组合物,其特征在于所述聚醚多元醇是二醇,优选具有20-500mg KOH/g的羟值。
11.根据前述权利要求中至少一项所述的聚氨酯组合物,其特征在于所述多元醇均不是聚醚多元醇。
12.根据前述权利要求中至少一项所述的聚氨酯组合物用作单组分粘合剂、反应性热熔粘合剂、涂料材料或密封剂的用途。
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CN110218515A (zh) * | 2019-05-31 | 2019-09-10 | 广东合胜实业股份有限公司 | 一种建筑外墙用的聚氨酯防水涂料及其制备方法 |
CN113527623A (zh) * | 2021-07-30 | 2021-10-22 | 浙江华峰合成树脂有限公司 | 一种无溶剂型聚氨酯树脂其制备方法和应用 |
CN116135900A (zh) * | 2021-11-16 | 2023-05-19 | 万华化学(北京)有限公司 | 一种用于沥青混合料回收料(rap)冷再生用的聚氨酯混凝土路面的结合料 |
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EP2948487B1 (de) | 2021-07-28 |
CN104937003B (zh) | 2019-05-10 |
CN110256648A (zh) | 2019-09-20 |
KR20150113057A (ko) | 2015-10-07 |
BR112015017130A2 (pt) | 2017-07-11 |
US20150322314A1 (en) | 2015-11-12 |
CN110256648B (zh) | 2022-09-13 |
EP2948487A1 (de) | 2015-12-02 |
MX2015009561A (es) | 2015-11-25 |
JP2016507619A (ja) | 2016-03-10 |
KR102202429B1 (ko) | 2021-01-12 |
WO2014114758A1 (de) | 2014-07-31 |
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