CN114761511A - 密封剂组合物 - Google Patents
密封剂组合物 Download PDFInfo
- Publication number
- CN114761511A CN114761511A CN201980102688.5A CN201980102688A CN114761511A CN 114761511 A CN114761511 A CN 114761511A CN 201980102688 A CN201980102688 A CN 201980102688A CN 114761511 A CN114761511 A CN 114761511A
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- China
- Prior art keywords
- composition
- condensation curable
- modified polymer
- sealant composition
- part condensation
- Prior art date
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Classifications
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Abstract
单部分可缩合固化甲硅烷基改性聚合物(SMP)基密封剂组合物,特别是含有催化剂的单部分可缩合固化SMP基密封剂组合物,所述催化剂包含(i)钛酸酯和/或锆酸酯和(ii)金属羧酸盐,所述组合物在固化后提供具有低模量和高弹性恢复率的弹性密封剂。
Description
本公开涉及提供单部分可缩合固化甲硅烷基改性聚合物(SMP)基密封剂组合物,特别是含有包含(i)钛酸酯和/或锆酸酯和(ii)金属羧酸盐的催化剂的单部分可缩合固化SMP基密封剂组合物,所述组合物在固化后提供具有低模量和高弹性恢复率的弹性密封剂。
室温可硫化(RTV)SMP基密封剂组合物为众所周知的。通常,这类组合物包含聚合物,其包含含有附接到合适有机聚合物主链的末端基团的硅烷醇(-Si-OH)或含有附接到合适有机聚合物主链的末端基团的Si-烷氧基,以及被设计成与-OH和/或烷氧基反应并且从而使组合物交联以形成弹性密封剂产物的一种或多种合适交联剂。一种或多种附加成分,如催化剂、增强填料、非增强填料、稀释剂(例如增塑剂和/或增量剂)、扩链剂、阻燃剂、耐溶剂添加剂、杀生物剂等,通常也在需要时并入这些组合物中。室温可硫化(RTV)SMP基密封剂组合物可为单部分组合物或多部分组合物。单部分组合物通常以基本上无水的形式储存以防止过早固化。这些组合物中水分的主要来源,如果不是唯一来源的话为无机填料,例如当存在时的二氧化硅。所述填料可在与其它成分相互混合之前使其无水,或者可在混合过程期间从混合物中提取水/水分以确保所得密封剂组合物为基本上无水的。
具有至少一个Si-烷氧基键,例如末端反应性甲硅烷基中的Si-甲氧基键并且具有聚氧化烯聚合物作为有机聚合主链的SMP密封剂组合物广泛用于建造行业中的密封剂,因为它们具有低粘度和良好的透湿性、粘合力和耐候性等。这些密封剂通常需要提供低模量固化产物,其能够通过少量应力而高度拉伸,用于各种应用,尤其是在建造行业。建造行业更喜欢消除在施加前混合成分的需要的单组分组合物和具有优异可加工性的组合物。
低模量室温可硫化(RTV)SMP密封剂组合物可用于多种应用。举例来说,它们作为高速公路密封剂以及最近在建造行业中实现相当大的商业成功。在某些应用如高层建筑物的建造中,利用低模量密封剂和/或粘合剂将窗玻璃粘合到建筑物结构的框架(金属或其它)上为期望的并且通常为至关重要的。低模量特性使得所得固化弹性体能够随着建筑物移动而易于压缩和膨胀,而不导致内聚或粘合失效。
事实上,最近的架构趋势为“镜面”高层建筑物,即出于美观和节能的原因,其中建筑物的外部具有大镜子的外观的高层建筑物已经使得人们对提供合适的低模量有机硅密封剂以提供这类效果产生极大的兴趣。
低模量密封剂典型地依赖于高分子量/链长的聚二有机硅氧烷聚合物,其用反应性基团封端,但沿聚合物链附接的反应性基团水平低,以便生成具有低交联密度的交联弹性产物。这类聚合物通常使用扩链过程制备,其中在组合物固化期间可利用合适的反应性硅烷作为扩链剂。然而,这类高分子量聚合物的使用典型地导致高粘度组合物,尤其是当增强填料也被引入组合物中时。
增强填料对组合物的成本和流变性以及在固化后由组合物形成的所得弹性材料的特性,例如耐磨性、拉伸和撕裂强度、硬度和模量都有重要贡献。举例来说,细颗粒热解法二氧化硅用于制造密封剂的组合物中,以便改善固化弹性体的强度。在液体组合物中包括填料以及高分子量聚合物导致组合物变硬并且组合物的流动性降低,这导致需要在混合期间增加施加的剪切力以在使用更大量的填料时实现组合物的期望的均匀混合状态。这可为室温固化材料中的主要问题,这些材料通常被寻求为可喷涂的,即借助于使用密封剂枪将未固化密封剂从密封剂管中推出来施加。
引入非反应性液体增塑剂/增量剂(有时称为加工助剂)已被用作降低未固化组合物粘度的手段。然而,一旦固化,固化密封剂内的非反应性液体可迁移并且潜在地从密封剂中渗出,这在较长时间段内可导致密封剂失效并且通常导致相邻基材中/上的染色和变色。
由含有四价锡基催化剂的组合物制备的低模量密封剂趋于失去膨胀和恢复能力,因为使用四价锡化合物作为催化剂似乎导致固化产物的恢复率降低,因此产物不可跟随膨胀和收缩。
标准JC/T881将具有低模量和高弹性恢复率的接缝密封剂分类为35LM和50LM类。符合包括于这些类别中的技术要求的密封剂被认为是高级密封剂,适合作为建造密封剂,更特别地是作为外饰面密封剂。虽然根据标准JC/T881满足35LM和/或50LM类要求的SMP基密封剂为已知的,但它们通常含有作为催化剂的有机锡化合物和/或含邻苯二甲酸酯的增塑剂,这两者都可存在监管问题。
本领域技术人员众所周知,烷氧基钛化合物,即钛酸烷基酯,为用于配制单组分可湿固化有机硅的合适催化剂(参考文献:Noll,W.;《有机硅化学与技术(Chemistry andTechnology of Silicones)》,学术出版社有限公司(Academic Press Inc.),纽约(NewYork),1968,第399页、Michael A.Brook,《有机化学、有机金属化学和聚合物化学中的硅(silicon in organic,organometallic and polymer chemistry)》,约翰·威利父子有限公司(John Wiley&sons,Inc.)(2000),第285页)。钛酸酯催化剂已广泛用于表皮或扩散固化的单部分缩合固化组合物中。表皮或扩散固化(例如水分/缩合)开始于在将密封剂/包封剂施加到基材表面之后在组合物/空气界面处初始形成固化表皮。在生成表面表皮之后,固化速度取决于水分从密封剂/包封剂与空气的界面向内部(或芯)的扩散速度,以及缩合反应副产物/流出物从材料的内部(或芯)向外部(或表面)的扩散速度,并且固化表皮随着时间的推移从外部/表面到内部/芯逐渐增厚。这些组合物典型地以单部分包装的形式提供,所述包装以≤15mm厚的层施加。已知厚度大于15mm的层导致在其他固化弹性体的深度存在未固化材料,因为水分非常缓慢地扩散到非常深的区段。
本文的公开寻求提供合适的替代可缩合固化SMP基密封剂组合物,其在固化后提供的弹性密封剂具有例如在100%伸长率下≤0.4MPa的低模量和在100%延伸后≥80%的高弹性恢复率。
本文提供一种单部分可缩合固化甲硅烷基改性聚合物(SMP)基密封剂组合物,其包含:-
(a)甲硅烷基改性有机聚合物,每个分子具有至少两个(R)m(Y1)3-m-Si基团,其中每个R为羟基或可水解基团,每个Y1为含有1至8个碳的烷基并且m为1、2或3,所述有机聚合物选自聚醚、烃聚合物、丙烯酸酯聚合物、聚酯、聚氨酯和聚脲;
以及
(b)增强填料
(c)一种或多种增塑剂
以及
(d)催化剂,其包含(i)钛酸酯和/或锆酸酯和(ii)金属羧酸盐。
本文还提供一种通过将所有成分混合在一起来制造上述组合物的方法。
本文还提供一种弹性密封剂材料,它为如上文所述的组合物的固化产物。
还提供上述组合物在外墙、绝缘玻璃、窗户建造、汽车、太阳能和建造领域中作为密封剂的用途。
还提供一种用于填充两个基材之间的空间以便在其间产生密封的方法,其包含:
a)提供如上文所述的单部分可缩合固化甲硅烷基改性聚合物(SMP)基密封剂组合物,和
b)将单部分可缩合固化甲硅烷基改性聚合物(SMP)基密封剂组合物施加到第一基材,并且使第二基材与已施加到第一基材的单部分可缩合固化甲硅烷基改性聚合物(SMP)基密封剂组合物接触,或
c)用单部分可缩合固化甲硅烷基改性聚合物(SMP)基密封剂组合物填充由第一基材和第二基材的排列形成的空间并且固化。
在本文中使用的“包含”的概念以其最广泛的意义使用来意指和涵盖“包括”和“由……组成”的概念。
出于本申请的目的,“取代”意指烃基中的一个或多个氢原子已被另一取代基替代。这类取代基的实例包括但不限于卤素原子,如氯、氟、溴和碘;含有卤素原子的基团,如氯甲基、全氟丁基、三氟乙基和九氟己基;氧原子;含有氧原子的基团,如(甲基)丙烯酸和羧基;氮原子;含有氮原子的基团,如氨基-官能团、酰胺基-官能团和氰基-官能团;硫原子;以及含有硫原子的基团,如巯基。
组分(a)为甲硅烷基改性有机聚合物,每个分子具有至少两个(R)m(Y1)3-m-Si基团,其中每个R为羟基或可水解基团,每个Y1为含有1至8个碳的烷基并且m为1、2或3。
甲硅烷基改性有机聚合物(a)的(R)m(Y1)3-m-Si基团可经由任何合适的键连接到有机聚合物主链,或在合适的情况下可直接键合。典型地,有机聚合物选自聚醚、烃聚合物、丙烯酸酯聚合物、聚氨酯和聚脲。举例来说,在甲硅烷基改性聚醚聚合物的情况下,(R)m(Y1)3-m-Si基团可为经由以下连接到聚醚聚合物主链的末端基团
(R)m(Y1)3-m-Si-D-[NH-C(=O)]k-
其中R、Y1和m如上文所述,D为二价C2-6亚烷基,可替代地C2-4亚烷基,可替代地亚乙基或亚丙基,并且k为1或0。因此甲硅烷基改性聚醚可被描述为(R)m(Y1)3-m-Si-D-[NH-C(=O)]k-O[CH(CH3)-CH2-O]u-[C(=O)-NH]k-D-Si(Y1)3-m(R)m
其中在以上实例中,出于实例的目的,聚醚重复基团为氧化丙烯基团[CH(CH3)-CH2-O],其中u为重复单元的数目。
(R)m(Y1)3-m-Si基团中的每个取代基R可独立地为羟基或可水解基团。可水解基团可选自酰氧基(例如乙酰氧基、辛酰氧基和苯甲酰氧基);酮肟基(例如二甲基酮肟基和异丁基酮肟基);烷氧基(例如甲氧基、乙氧基和丙氧基)和烯氧基(例如异丙烯基氧基和1-乙基-2-甲基乙烯基氧基)。然而,优选每个R为OH基或具有1至10个碳的烷氧基,可替代地OH基或具有1至6个碳的烷氧基,可替代地OH基、甲氧基或乙氧基,可替代地甲氧基或乙氧基。取代基Y1为含有1至8个碳,可替代地1至6个碳,可替代地1至4个碳的烷基。因此,当R为OH或可水解基团并且可水解基团为烷氧基时,(R)m(Y1)3-m-Si基团可选自-(Y1)SiOH2、-(Y1)2SiOH、-Y1Si(ORb)2、-Si(ORb)3、-(Y1)2SiORb,其中Rb为具有1至8个碳的烷基。
如先前所提到的,甲硅烷基改性有机聚合物(a)具有带有末端可固化甲硅烷基的有机主链。有机聚合主链可选自聚醚、烃聚合物、丙烯酸酯聚合物、聚氨酯和聚脲。
当甲硅烷基改性有机聚合物(a)为烷氧基甲硅烷基封端的有机聚合物时,如先前所述,有机聚合物为聚醚。而聚合物主链在上述结构中例示为
(-CpH2p-O-)y
其中p为2至4的整数,包括端点,并且y为≥4的整数,即至少为四。
实例可为具有以下重复基团的聚醚,例如[CH(CH3)-CH2-O]y
每种聚醚的数均分子量(Mn)可在约300至约10,000范围内,其可借助于ASTMD5296-05测定并且以聚苯乙烯分子量当量计算。而且,在整个聚氧化烯中,氧化烯单元不一定是相同的,但是从单元到单元可不同。举例来说,聚氧化烯可包含氧化乙烯单元(-C2H4-O-)、氧化丙烯单元(-C3H6-O-)或氧化丁烯单元(-C4H8-O-)或其混合物。优选地,聚氧化烯聚合主链基本上由氧化乙烯单元或氧化丙烯单元组成。聚氧化烯通常具有末端羟基并且可容易地用可湿固化甲硅烷基进行改性,例如通过与过量的烷基三烷氧基硅烷反应以引入末端烷基二烷氧基甲硅烷基,如先前所讨论的。可替代地,可经由氢化硅烷化类型的方法发生聚合。完全或主要由氧化丙烯单元组成的聚氧化烯具有适用于许多密封剂和/或粘合剂应用的特性。
其它聚氧化烯可包括例如:以下结构的单元:
-[-Re-O-(-Rf-O-)h-Pn-CRg 2-Pn-O-(-Rf-O-)q1-Re]-
其中Pn为1,4-亚苯基,每个Re相同或不同并且为具有2至8个碳原子的二价烃基,每个Rf相同或不同并且为亚乙基或亚丙基,每个Rg相同或不同并且为氢原子或甲基并且下标h和q1中的每一个为在3至30范围内的正整数。
可替代地,有机聚合主链可为丙烯酸酯聚合物主链。丙烯酸酯聚合物为丙烯酸酯和/或甲基丙烯酸酯单体的加成聚合聚合物,所述单体在丙烯酸酯聚合物中占单体单元的至少50重量%(即50重量%至100重量%)。丙烯酸酯单体的实例为丙烯酸正丁酯、丙烯酸异丁酯、丙烯酸正丙酯、丙烯酸乙酯、丙烯酸甲酯、丙烯酸正己酯、丙烯酸正辛酯和丙烯酸2-乙基己酯。甲基丙烯酸酯单体的实例为甲基丙烯酸正丁酯、甲基丙烯酸异丁酯、甲基丙烯酸甲酯、甲基丙烯酸正己酯、甲基丙烯酸正辛酯、甲基丙烯酸2-乙基己酯和甲基丙烯酸月桂酯。丙烯酸酯聚合物优选具有低于环境温度的玻璃化转变温度(Tg);丙烯酸酯聚合物通常优于甲基丙烯酸酯,因为它们形成较低Tg的聚合物。特别优选聚丙烯酸丁酯。丙烯酸酯聚合物可含有较少量的其它单体,如苯乙烯、丙烯腈或丙烯酰胺。一种或多种丙烯酸酯可通过各种方法聚合,如常规自由基聚合或活性自由基聚合,如原子转移自由基聚合、可逆加成-断裂链转移聚合或包括活性阴离子聚合的阴离子聚合。
甲硅烷基改性有机聚合物(a)也可为甲硅烷基改性烃聚合物。甲硅烷基改性烃聚合物的实例包括甲硅烷基改性聚异丁烯。甲硅烷基改性聚异丁烯可例如含有衍生自甲硅烷基取代的丙烯酸烷基酯或甲基丙烯酸烷基酯单体如甲基丙烯酸烷氧基二烷基甲硅烷基丙酯、甲基丙烯酸二烷氧基烷基甲硅烷基丙酯或甲基丙烯酸三烷氧基甲硅烷基丙酯的可固化甲硅烷基,其可与聚异丁烯反应。
典型地,甲硅烷基改性有机聚合物(a)以组合物的10至80重量%,可替代地组合物的10至60重量%,可替代地组合物的15至50重量%,可替代地组合物的15至40重量%的量存在于组合物中。
组合物还包含增强填料(b)。增强填料(b)可含有一种或多种细微粉碎的增强填料,如沉淀碳酸钙、热解法二氧化硅胶态二氧化硅和/或沉淀二氧化硅,包括例如稻壳灰。典型地,增强填料(b)的表面积在根据BET方法(ISO 9277:2010)测量的沉淀碳酸钙的情况下为至少15m2/g,可替代地在沉淀碳酸钙的情况下为15至50m2/g,可替代地15至25m2/g。根据BET方法(ISO 9277:2010),二氧化硅增强填料的典型表面积为至少50m2/g。在一个实施例中,增强填料(b)为沉淀碳酸钙、沉淀二氧化硅和/或热解法二氧化硅;可替代地,沉淀碳酸钙。在高表面积热解法二氧化硅和/或高表面积沉淀二氧化硅的情况下,这些的表面积可为根据BET方法(ISO 9277:2010)测量的75至400m2/g,可替代地根据BET方法(ISO 9277:2010)测量的100至300m2/g。
增强填料(b)可以例如用一种或多种脂肪族酸例如脂肪酸如硬脂酸或脂肪酸酯如硬脂酸酯,或用有机硅烷、有机硅氧烷或有机硅氮烷六烷基二硅氮烷或短链硅氧烷二醇进行疏水处理,以使一种或多种填料疏水,并且因此更容易处理并且获得与其它粘合剂组分的均匀混合物。填料的表面处理使其易于被甲硅烷基改性有机聚合物(a)润湿。这些表面改性的填料不结块并且可以均匀地并入到基础组分的有机硅聚合物(a)中。这导致未固化组合物的室温机械性能改善。填料在与甲硅烷基改性有机聚合物(a)混合时可被预处理或可被原位处理。
典型地,增强填料以组合物的5至65重量%,可替代地组合物的20至65重量%,可替代地组合物的25至60重量%,可替代地组合物的30至60重量%的量存在于组合物中。
组合物的组分(c)为一种或多种增塑剂。增塑剂(c)通常用于含有甲硅烷基改性有机聚合物(a)的组合物中。鉴于甲硅烷基改性有机聚合物(a)的主链基本上为有机的(即在聚合物主链中不含Si-O-Si键)的事实,增塑剂(c)通常选自适合于增塑甲硅烷基改性有机聚合物(a)的那些。
增塑剂(c)的实例包括但不限于:-
二价醇(例如乙二醇、二甘醇、三甘醇、丙二醇、二丙二醇);聚醚多元醇(例如聚乙二醇、聚丙二醇、聚丁二醇和/或分子量为500或更高,或甚至1,000或更高的羟基封端的聚丙烯/聚乙烯醚共聚物,如商业上的羟基封端的聚丙烯醚由陶氏化学公司(Dow ChemicalCompany)以VORANOL商标销售;
通过将这些聚醚多元醇的羟基转化为酯基、醚基或其它基团获得的聚醚衍生物;烷氧基封端的聚丙烯醚、烷氧基封端的聚乙烯醚、烷氧基封端的聚丙烯/聚乙烯醚共聚物
聚亚烷基二醇的酯,如二甘醇二苯甲酸酯、三甘醇二苯甲酸酯和季戊四醇酯;
由二元酸(例如癸二酸、己二酸、壬二酸、邻苯二甲酸)制备的聚酯增塑剂,即邻苯二甲酸酯,如邻苯二甲酸二丁酯、邻苯二甲酸二庚酯、邻苯二甲酸双(2-乙基己基)酯、邻苯二甲酸二异壬酯(DINP)邻苯二甲酸二异癸酯(DIDP)、邻苯二甲酸二辛酯(DOP)邻苯二甲酸二异辛酯(DIOP)和邻苯二甲酸丁苄酯;通过氢化上述邻苯二甲酸酯获得的环己烷二羧酸酯,如由巴斯夫(BASF)以商品名Hexamoll DINCH出售的那些;
非芳香族二元酸酯如己二酸二辛酯、癸二酸二辛酯、癸二酸二丁酯和琥珀酸异癸酯;环己烷二甲酸酯如环己烷二甲酸二异壬酯和环己烷二甲酸双(2-乙基己基)酯;脂肪族酯如油酸丁酯和乙酰蓖麻酸甲酯;磷酸酯如磷酸三甲苯酯和磷酸三丁酯;偏苯三酸酯;和/或
烃油如烷基联苯和部分氢化的三联苯。
增塑剂(c)典型地以组合物的5至40重量%,可替代地组合物的5至35重量%,可替代地组合物的10至30重量%的量存在。
如上文所述,催化剂(d)包含(i)钛酸酯和/或锆酸酯和(ii)金属羧酸盐。选择用于包括在特定有机硅密封剂组合物中的钛酸酯和/或锆酸酯(i)取决于所需的固化速度。钛酸酯和/或锆酸酯基催化剂可包含根据通式Ti[OR9]4或Zr[OR9]4的化合物,其中每个R9可相同或不同并且代表一价、伯、仲或叔脂肪族烃基,其可为含有1至10个碳原子的直链或支链。任选地,钛酸酯/锆酸酯可含有部分不饱和基团。
然而,R9的优选实例包括但不限于甲基、乙基、丙基、异丙基、丁基、叔丁基和支链仲烷基如2,4-二甲基-3-戊基。优选地,当每个R9相同时,R9为异丙基、支链仲烷基或叔烷基,特别是叔丁基。出于实例的目的,合适的实例包括钛酸四正丁酯、钛酸四叔丁酯、钛酸四叔丁氧基酯和钛酸四异丙氧基酯(以及锆酸酯等同物)。可替代地,钛酸酯/锆酸酯可螯合。螯合可使用任何合适的螯合剂,如乙酰基丙酮酸烷基酯,如乙酰基丙酮酸甲酯或乙酰基丙酮酸乙酯,例如二异丙氧基二乙基乙酰乙酸酯钛酸酯。可替代地,钛酸酯/锆酸酯可为带有三种螯合剂的单烷氧基钛酸酯,例如2-丙醇合、三异十八烷合钛酸酯。在一个实施例中,(i)为钛酸酯或螯合钛酸酯。
在本公开中,催化剂(d)还包含(ii)金属羧酸盐,其中金属选自锌、铝、铋、铁和/或锆中的一种或多种。羧酸酯基团具有式R15COO-,其中R15选自氢、烷基、烯基和芳基。对于R15有用的烷基的实例包括具有1至18个碳原子,可替代地1至8个碳原子的烷基。对于R15有用的烯基的实例包括具有2至18个碳原子,可替代地2至8个碳原子的烯基,如乙烯基、2-丙烯基、烯丙基、己烯基和辛烯基。对于R15有用的芳基的实例包括具有6至18个碳原子,可替代地6至8个碳原子的芳基,如苯基和苄基。可替代地,R15为甲基、2-丙烯基、烯丙基和苯基。因此催化剂(e)中的金属羧酸盐(ii)可为羧酸锌(II)、羧酸铝(III)、羧酸铋(III)和/或羧酸锆(IV)、烷基羧酸锌(II)、烷基羧酸铝(III)、烷基羧酸铋(III)和/或烷基羧酸锆(IV)或其混合物。催化剂(d)中的金属羧酸盐(ii)的具体实例包括乙基己酸锌、乙基己酸铋、硬脂酸锌、十一碳烯酸锌、新癸酸锌和2-乙基己酸铁(III)。催化剂(d)的钛酸酯和/或锆酸酯(i)和金属羧酸盐(ii)以1:4至4:1的摩尔比提供。
催化剂(d)典型地以组合物的0.25至4.0重量%,可替代地组合物的0.25至3重量%,可替代地组合物的0.3重量%至2.5重量%的量存在。
任选地,催化剂(d)可另外包括锡催化剂。适用于参与固化催化的任何合适的锡基缩合催化剂。实例包括三氟甲磺酸锡、有机锡金属催化剂如酒石酸三乙基锡、辛酸锡、油酸锡、萘甲酸锡、三-2-乙基己酸丁基锡、丁酸锡、三辛二酸甲氧羰基苯基锡、三蜡酸异丁基锡和二有机锡盐,尤其是二羧酸二有机锡化合物,如二月桂酸二丁基锡、二丁酸二甲基锡、二甲氧基二丁基锡、二乙酸二丁基锡、双新癸酸二甲基锡、二苯甲酸二丁基锡、辛酸亚锡、双(2,4-戊二酸二丁基锡、二新癸酸二甲基锡(DMTDN)和二辛酸二丁基锡。
当存在时,锡基催化剂典型地以组合物的至多1.0重量%,可替代地组合物的0.01至0.5重量%,可替代地组合物的0.02至0.3重量%的量存在。
如果认为适合最终用途,那么如本文所述的组合物可另外包括一种或多种附加添加剂。这些可包括非增强填料、流变改性剂、粘合促进剂、稳定剂如抗氧化剂、UV和/或光稳定剂和光稳定剂、颜料、水清除剂(典型地与用作交联剂或硅氮烷的化合物相同),以及杀真菌剂和/或杀生物剂等;应当理解,添加剂中的一些包括在多于一种添加剂列表中。然后,这类添加剂将具有以所提及的所有不同方式起作用的能力。
合适的非增强填料可包含例如碎石英、磨碎的碳酸钙、硅藻土、硫酸钡、氧化铁、二氧化钛和碳黑、滑石、硅灰石可存在于组合物中。可单独使用或除上述之外使用的其它非增强填料包括矾石、硫酸钙(硬石膏)、石膏、硫酸钙、碳酸镁、粘土如高岭土、三氢氧化铝、氢氧化镁(水镁石)、石墨、碳酸铜,例如孔雀石、碳酸镍,例如翠镍矿(zarachite)、碳酸钡,例如毒重石和/或碳酸锶,例如菱镁矿。
氧化铝、来自由以下组成的组的硅酸盐:橄榄石族;石榴石族;铝硅酸盐;环状硅酸盐;链状硅酸盐;以及片状硅酸盐。橄榄石族包含硅酸盐矿物,如但不限于镁橄榄石和Mg2SiO4。石榴石族包含磨碎的硅酸盐矿物,如但不限于镁铝榴石;Mg3Al2Si3O12;钙铝榴石;和Ca2Al2Si3O12。铝硅酸盐包含磨碎的硅酸盐矿物,如但不限于硅线石;Al2SiO5;莫来石;3Al2O3.2SiO2;蓝晶石;和Al2SiO5
环状硅酸盐族包含硅酸盐矿物,如但不限于堇青石和Al3(Mg,Fe)2[Si4AlO18]。链状硅酸盐族包含磨碎的硅酸盐矿物,如但不限于硅灰石和Ca[SiO3]。
片状硅酸盐族包含硅酸盐矿物,如但不限于云母;K2AI14[Si6Al2O20](OH)4;叶蜡石;Al4[Si8O20](OH)4;滑石;Mg6[Si8O20](OH)4;蛇纹石,例如石棉;高岭石;Al4[Si4O10](OH)8;和蛭石。
非增强填料也可使用如上文针对增强填料(b)所讨论的类似处理剂进行表面处理以使其疏水。
可并入根据本发明的可湿固化组合物中的流变改性剂包括有机硅有机共聚物,如在EP0802233中描述的基于聚醚或聚酯的多元醇的那些;蜡如聚酰胺蜡、选自由聚乙二醇、聚丙二醇、乙氧基化蓖麻油、油酸乙氧基化物、烷基酚乙氧基化物、共聚物或环氧乙烷和环氧丙烷以及有机硅聚醚共聚物组成的组的非离子表面活性剂;以及有机硅二醇。对于一些体系,这些流变改性剂,特别是环氧乙烷和环氧丙烷的共聚物以及有机硅聚醚共聚物,可增强对基材,特别是塑料基材的粘合力。
当存在时,流变改性剂以组合物的至多10重量%,可替代地组合物的至多7.5重量%,可替代地组合物的至多5重量%的量存在。
合适的粘合促进剂可包含下式的烷氧基硅烷
R14 dSi(OR15)(4-d)
其中下标d为1、2或3,可替代地d为3。每个R14独立地为一价有机官能团。R14可为环氧官能团如缩水甘油氧基丙基或(环氧环己基)乙基、氨基官能团如氨基乙基氨基丙基或氨基丙基、甲基丙烯酰氧基丙基、巯基官能团如巯基丙基或不饱和有机基团。每个R15独立地为具有至少1个碳原子的未取代的饱和烃基。R15可具有1至4个碳原子,可替代地1至2个碳原子。R15由甲基、乙基、正丙基和异丙基例示。
可替代地,粘合促进剂可为缩水甘油氧基丙基三甲氧基硅烷或通过上述两种或更多种反应获得的多功能材料。举例来说,烷基烷氧基有机硅,例如三甲氧基甲基硅烷;氨基烷氧基硅烷,例如3-氨基丙基三甲氧基硅烷和环氧烷氧基硅烷,例如缩水甘油氧基丙基三甲氧基硅烷的反应产物;(i):(ii):(iii)的重量比为0.1-6:0.1-5:1。
合适的粘合促进剂的实例可包括以下结构的分子
(R'O)3Si(CH2)nN(H)-(CH2)eNH2
其中每个R'可相同或不同并且为含有1至10个碳原子的烷基,n为2至10并且e为2至10;
粘合促进剂为任选的成分,其可以组合物的至多3重量%,可替代地组合物的至多2%的量,可替代地以组合物的至多1%的量存在。优选地,粘合促进剂的水解速度应低于交联剂的水解速度,以便有利于分子向基材扩散,而不是将其并入产物网络中。
如果认为需要,那么可利用任何合适的一种或多种抗氧化剂。实例可包括:亚乙基双(氧化乙烯)双(3-叔丁基-4-羟基-5(甲基氢化肉桂酸酯)36443-68-2;四[亚甲基(3,5-二叔丁基-4-羟基氢化肉桂酸酯)]甲烷6683-19-8;3,5-二叔丁基-4-羟基氢化肉桂酸十八烷基酯2082-79-3;N,N'-六亚甲基-双(3,5-二叔丁基-4-羟基氢化肉桂酰胺)23128-74-7;3,5-二叔丁基-4-羟基氢化肉桂酸,C7-9支链烷基酯125643-61-0;N-苯基苯胺,与2,4,4-三甲基戊烯的反应产物68411-46-1;例如,从巴斯夫以名称销售的抗氧化剂。
所提到的每种类型的稳定剂可在需要时以组合物的0.1至1.0重量%的量存在。
根据需要利用颜料使组合物着色。可利用任何合适的颜料,只要它与组合物相容。颜料和/或有色(非白色)非增强填料,例如碳黑,可用于使组合物和最终的最终弹性产物例如密封剂后固化着色。当存在时,碳黑将同时用作非增强填料和着色剂。
颜料可以任何期望的量存在于组合物中,只要它不对组合物或所得弹性产物的物理特性产生负面影响。虽然为任选的,但它们可以组合物的至多20重量%,可替代地组合物的至多10重量%,可替代地组合物的至多5重量%的量存在。
如果需要,那么可使用任何合适的水分/水清除剂,例如原甲酸酯、分子筛二硅氮烷、聚硅氮烷和/或以下结构的一种或多种硅烷
R6 jSi(OR5)4-j
其中每个R5可相同或不同并且为含有至少一个碳原子的烷基;
j为1或0;并且
R6为选自具有至少一个碳、环烷基、芳基、芳烷基或前述中的任一种的取代或未取代的直链或支链一价烃基的硅键合有机基团,其中与碳键合的至少一个氢原子被卤素原子或具有环氧基、缩水甘油基、酰基、羧基、酯基、氨基、酰胺基、(甲基)丙烯酰基、巯基或异氰酸酯基的有机基团取代;
可使用任何合适的二硅氮烷或聚硅氮烷水分/水清除剂,例如可为直链或环状的硅氮烷,如六甲基二硅氮烷、六甲基环三硅氮烷。八甲基四硅氮烷、三甲基三苯基环三硅氮烷、三乙烯基三甲基环三硅氮烷。水分/水清除剂也可为一种或多种和聚硅氮烷,即含有重复单元如亚芳基硅氮烷如亚苯基硅氮烷和亚烷基硅氮烷如亚甲基硅氮烷重复单元例如六甲基二硅氮烷、六甲基环三硅氮烷。八甲基四硅氮烷、三甲基三苯基环三硅氮烷和/或三乙烯基三甲基环三硅氮烷的聚合物。
水分/水清除剂也为任选的,但可以组合物的至多10重量%的量存在于组合物中。当存在时,它典型地以组合物的0.1至7.5重量%,可替代地组合物的0.2至5重量%,可替代地组合物的0.3至3重量%的范围存在。
如果需要,那么可在组合物中另外利用杀生物剂。术语“杀生物剂”旨在包括杀菌剂、杀真菌剂和杀藻剂等。出于实例的目的,可用于如本文所述的组合物中的有用杀生物剂的合适实例包括:
氨基甲酸酯如甲基-N-苯并咪唑-2-基氨基甲酸酯(多菌灵)和其它合适的氨基甲酸酯、10,10'-氧代双吩噁砒、2-(4-噻唑基)-苯并咪唑、N-(氟二氯甲硫基)邻苯二甲酰亚胺、二碘甲基对甲苯基砜,如果合适,与UV稳定剂结合使用,如2,6-二(叔丁基)-对甲酚、3-碘-2-丙炔基丁基氨基甲酸酯(IPBC)、2-吡啶硫醇1-氧化锌、三唑基化合物和异噻唑啉酮,如4,5-二氯-2-(正辛基)-4-异噻唑啉-3-酮(DCOIT)、2-(正辛基)-4-异噻唑啉-3-酮(OIT)和正丁基-1,2-苯并异噻唑啉-3-酮(BBIT)。其他杀生物剂可以包括例如吡啶硫酮锌、1-(4-氯苯基)-4,4-二甲基-3-(1,2,4-三唑-1-基甲基)戊-3-醇和/或1-[[2-(2,4-二氯苯基)-4-丙基-1,3-二氧戊环-2-基]甲基]-1H-1,2,4-三唑。
杀真菌剂和/或杀生物剂可合适地以组合物的0至0.3重量%的量存在并且可在需要时以包封形式存在,如EP2106418中所述。
单部分可缩合固化甲硅烷基改性聚合物(SMP)基粘合剂组合物可包含以下成分的任何组合,其条件是总重量%为100wt%;-
甲硅烷基改性有机聚合物(a)以组合物的10至80重量%,可替代地组合物的10至60重量%,可替代地组合物的15至50重量%,可替代地组合物的15至40重量%的量存在于组合物中;
增强填料(b)以组合物的5至65重量%,可替代地组合物的20至65重量%,可替代地组合物的25至60重量%,可替代地组合物的30至60重量%的量存在于组合物中;
增塑剂(c)以组合物的5至40重量%,可替代地组合物的5至35重量%,可替代地组合物的10至30重量%的量存在;和
催化剂(d)以组合物的0.25至4.0重量%,可替代地组合物的0.25至3重量%,可替代地组合物的0.3重量%至2.5重量%的量存在。
当存在时,流变改性剂以组合物的至多10重量%,可替代地组合物的至多7.5重量%,可替代地组合物的至多5重量%的量存在;
当存在时,粘合促进剂以组合物的至多3重量%,可替代地组合物的至多2%的量,可替代地以组合物的至多1%的量存在。
当存在时,稳定剂或存在的每种不同类型的稳定剂可以组合物的0.1至1.0重量%的量存在;并且组合物可包含如本文所定义的其它添加剂。
组合物优选地为室温可硫化组合物,因为它们在室温下固化而不需要加热,但如果认为合适的话,那么可通过加热来加速。典型地,组合物可固化任何合适的时段,例如在室温(大约23℃)和50%相对湿度(RH)下固化24小时后,组合物将固化约2至3mm的深度。
同时具有低模量和较高的弹性恢复率可赋予密封剂较高的移动能力。虽然一般而言,低模量密封剂通常表现出低弹性恢复率,但使用本文所述的测试方法,由本文的组合物制造的弹性产物已被开发成提供在100%伸长率下小于0.4MPa的模量(ASTM D412-98a(2002)e1)和在100%延伸后高于80%的弹性恢复率。因此,基于在标准JC/T881中设定的要求,本发明组合物和固化后的所得弹性材料通过具有具有平衡的模量和弹性恢复率而满足处于35LM和50LM类的密封剂的要求:固化后的密封剂配制物具有在100%伸长率下小于0.4MPa的模量和在100%延伸后大于80%的弹性恢复率以及对混凝土的良好粘合力。
成分以及其量被设计成提供低模量和高延伸率的密封剂、粘合剂和/或涂料组合物。低模量有机硅密封剂组合物优选地为“可喷涂的”,即它们具有合适的挤出能力,即如通过ASTM C1183-04所测量的10毫升/分钟,可替代地10至1000毫升/分钟和可替代地100至1000毫升/分钟的最小挤出速率。
选择密封剂组合物中的成分以及其量以赋予后固化密封剂材料移动能力。如通过ASTM C719-13所测量的,移动能力大于25%,可替代地移动能力在25%至50%范围内。
如上文所述的密封剂组合物可为可喷涂密封剂组合物,其用于
(i)空间/间隙填充应用;
(ii)密封应用,如密封建造膜中搭接接缝的边缘;或
(iii)密封渗透应用,例如密封建造膜中的通风口;
(iv)将至少两个基材粘合在一起。
(v)两个基材之间的层压层,以产生第一基材、密封剂产物和第二基材的层压板。
在上述(v)的情况下,当作为层压板中的层使用时,产生的层压结构不限于这三层。可施加附加固化密封剂层和基材。层压板中的可喷涂密封剂组合物层可为连续的或不连续的。
如上文所述的密封剂组合物可施加到任何合适的基材上。合适的基材可包括但不限于玻璃;混凝土;砖;灰泥;金属,如铝、铜、金、镍、硅、银、不锈钢合金和钛;陶瓷材料;塑料包括工程塑料,如环氧树脂、聚碳酸酯、聚(对苯二甲酸丁二醇酯)树脂、聚酰胺树脂以及其共混物,如聚酰胺树脂与间规聚苯乙烯的共混物,如可商购自美国密歇根州米德兰的陶氏化学公司(The Dow Chemical Company,of Midland,Michigan,U.S.A.)的那些,丙烯腈-丁二烯-苯乙烯、苯乙烯改性的聚(苯醚)、聚(苯硫醚)、乙烯基酯、聚邻苯二甲酰胺和聚酰亚胺;纤维素基材,如纸、织物和木材;以及其组合。当使用多于一种基材时,不要求基材由相同材料制造。举例来说,可以形成塑料和金属基材或木材和塑料基材的层压板。
在如上文所述的有机硅密封剂组合物的情况下,还提供一种用于填充两个基材之间的空间以便在其间产生密封的方法,其包含:
a)提供如上文所述的单部分可缩合固化甲硅烷基改性聚合物(SMP)基密封剂组合物,和
b)将单部分可缩合固化甲硅烷基改性聚合物(SMP)基密封剂组合物施加到第一基材,并且使第二基材与已施加到第一基材的单部分可缩合固化甲硅烷基改性聚合物(SMP)基密封剂组合物接触,或
c)用单部分可缩合固化甲硅烷基改性聚合物(SMP)基密封剂组合物填充由第一基材和第二基材的排列形成的空间并且固化。
在一个替代方案中,如上文所述的密封剂组合物可为自流平高速公路密封剂。自流平密封剂组合物意指其在从储存容器挤出到水平接缝中时为“自流平的”;即,密封剂将在重力作用下充分流动,以在密封剂和接缝空间的侧面之间提供紧密接触。这允许密封剂最大程度地粘合到接缝表面。自流平还消除了在将密封剂放入接缝中后对其进行加工的必要性,如设计用于水平和垂直接缝的密封剂所要求的。因此,密封剂流动得足够好以在应用时填充裂缝。如果密封剂具有足够的流动性,那么在重力作用下,其将与不规则裂缝壁的侧面形成紧密接触,并且形成良好的粘结;无需在密封剂被挤出到裂缝中后对其进行加工,以便机械地迫使其与裂缝侧壁接触。
如本文所述的自流平组合物可用作密封剂,其具有在沥青路面密封中起作用所需的特性的独特组合。沥青铺路材料用于通过构建可观厚度的材料如20.32cm来形成沥青高速公路,并且通过覆盖约10.16cm厚的层来修复恶化的混凝土高速公路。沥青覆盖层发生称为反射裂缝的现象,其中由于底层混凝土在混凝土中存在的接缝处的移动而在沥青覆盖层中形成裂缝。这些反射裂缝需要进行密封以防止水渗入裂缝中,当水冻结和膨胀时,这将导致沥青路面的另外破坏。
为了对出于如热膨胀和收缩的任何原因而发生移动的裂缝形成有效密封,密封材料必须与裂缝侧壁处的界面粘结,并且在裂缝压缩和膨胀时不得内聚失效。在沥青路面的情况下,密封剂不得对界面处的沥青施加足够的应变,以导致沥青本身失效;也就是说,密封剂的模量必须足够低,以使施加在粘结线处的应力远低于沥青的屈服强度。
在这种情况下,固化材料的模量被设计成足够低,使得其不对沥青施加足够的力,从而导致沥青内聚失效。固化材料使得在受到拉力时,由拉力引起的应力水平随着时间的推移而降低,使得即使伸长严重,接缝也不承受高应力水平。
可替代地,本文提供的有机硅弹性组合物可用作弹性涂料组合物时,例如用作建造材料的阻隔涂料或用作屋顶的防水涂料时,组合物可具有与油漆不同的粘度,从而使得能够通过例如刷子、辊或喷枪等而施加。如本文所述的涂料组合物,当施加到基材上时,可以设计成在由例如季节性热膨胀和/或收缩、紫外线和天气引起的正常移动情况下为基材提供例如防止空气和水渗透的长期保护。此类涂料组合物即使在暴露于阳光、雨雪或极端温度时也可以保持防水性能。
实例
使用表1中的组合物制备比较密封剂组合物,可看出所述组合物含有基本成分和几种任选成分。
表1比较实例的组成
Kaneka SilylTM SAX510和Kaneka SilylTM SAX520都是不含异氰酸酯的聚合物,具有重复的聚环氧丙烷单元的聚合链和三甲氧基甲硅烷基末端基团;
XTCC-201PCC为江西新泰化工(Jiangxi Xintai Chemical)的表面处理的沉淀碳酸钙;
比较密封剂组合物根据下述方法在10L Turello混合器上使用上述组合物制备。
首先,将Kaneka SilylTM SAX510和Kaneka SilylTM SAX520聚合物引入混合器中。随后依次添加以下成分,即:-
DINP、
XTCC-201PCC。
然后将混合物在105℃下在全真空下以800转/分钟(rpm)搅拌90分钟,并且冷却至<45℃。一旦组合物的温度<45℃,就添加剩余成分,即乙烯基三甲氧基硅烷、相关的一种或多种催化剂、乙二胺丙基三甲氧基硅烷和乙酰乙酸甲酯。然后将最终混合物在氮气氛中再混合20分钟,并且随后通过在-75kPa压力下施加真空而脱气,并且然后然后包装到标准筒中用于测试。
然后测试如上所述制备的组合物的物理特性,如下表2所描绘。此后根据(ASTMD412-98a(2002)e1)测试的所有样品均利用哑铃形测试件。
表2a:比较实例的一般物理特性
弹性恢复率:在哑铃样本上由墨水标记2.54cm(1.0英寸)的长度,厚度为约2mm,作为原始长度(A);哑铃被100%拉伸,(即拉伸至5.08cm,2.0英寸=B)并且将100%延伸维持24小时;随后释放哑铃并且使其恢复1小时;测试标记之间的最终长度(C)。弹性恢复率确定为=(B-C)/(B-A)*100%
还评估比较实例的粘合特性,并且在下表2b中描绘。
表2b:比较实例的粘合特性
底漆P为DOWSILTM建造底漆P,可商购自陶氏有机硅公司(Dow SiliconesCorporation)的粘合促进剂用于砌体表面。它包含溶剂中的烷氧基硅烷树脂配制物。
当涂层本身破裂而未从基材(例如钢板)上脱落时,观察到内聚失效(CF)。在一些情况下,可观察到混合失效模式;即一些区域剥离(即AF),而一些区域仍然被涂层覆盖(即CF)。在这种情况下,表面部分显示CF(%CF)。
根据本公开的实例也经由与上述相同的方法使用下表3中描绘的组合物制造
表3实例的组成
表4a:实例的一般物理特性
实例1 | 实例2 | 实例3 | 实例4 | |
无粘性时间(TFT)(分钟)(ASTM C679-15) | 160 | 171 | 98 | 102 |
抗拉强度(MPa)(ASTM D412-98a(2002)e1) | 0.72 | 0.71 | 0.73 | 0.66 |
伸长率,%(ASTM D412-98a(2002)e1) | 529 | 697 | 681 | 696 |
在100%下的模量,(MPa)(ASTM D412-98a(2002)e1) | 0.358 | 0.325 | 0.304 | 0.274 |
在150%下的模量,(MPa)(ASTM D412-98a(2002)e1) | 0.421 | 0.388 | 0.379 | 0.346 |
在200%下的模量,(MPa)(ASTM D412-98a(2002)e1) | 0.464 | 0.431 | 0.425 | 0.392 |
硬度,肖氏A(ASTM C 661-15) | 14.5 | 13.8 | 13.8 | 12.3 |
弹性恢复率,% | 87.1 | 84.6 | 84.0 | 81.2 |
表4b:实例的一般物理特性
对于比较实例1,仅使用Zn(EHA)2作为催化剂的样品即使在室温下调节七天后也不可完全固化,并且证明催化活性低。对于仅使用Ti催化剂的比较实例2和3,样品可得到低模量和高弹性恢复率,但对混凝土的粘合力不好,尤其是在浸水条件下。如对于使用本文所述的催化剂的发明实例4和5,两个样品记录的模量值均小于0.4MPa,弹性恢复率大于80%,并且对混凝土具有良好粘合力。单独添加Zn(EHA)2和Ti作为催化剂得到与预混合Zn(EHA)2和Ti相似的结果,如低模量、高弹性恢复率和对混凝土的良好粘合力,如从发明实例6和7所看出的。
表5:实例的组成
表6a:实例的一般物理特性
实例5 | 实例6 | 实例7 | |
无粘性时间(TFT)(分钟)(ASTM C679-15) | 259 | 70 | 98 |
抗拉强度(MPa)(ASTM D412-98a(2002e1)) | 0.83 | 0.79 | 0.58 |
伸长率,%(ASTM D412-98a(2002e1)) | 763 | 550 | 803 |
在100%下的模量,(MPa)(ASTM D412-98a(2002e1)) | 0.200 | 0.301 | 0.116 |
在200%下的模量,(MPa)(ASTM D412-98a(2002e1)) | 0.290 | 0.442 | 0.197 |
硬度肖氏A(ASTM C 661-15) | 10.2 | 14.6 | 5.8 |
弹性恢复率(%) | 75.4 | 84.6 | 79.7 |
表6b:实例的一般物理特性
标准JC/T881将具有低模量和高弹性恢复率的接缝密封剂分类为35LM和50LM类。符合包括于这些类别中的技术要求的密封剂被认为是高级密封剂,适合作为建造密封剂,更特别地是作为外饰面密封剂。虽然根据标准JC/T881满足35LM和/或50LM类要求的SMP基密封剂为已知的,但它们通常含有作为催化剂的有机锡化合物和/或含邻苯二甲酸酯的增塑剂,这两者都可存在监管问题,而我们已经证明如本文所述的催化剂提供合适的弹性密封剂。
Claims (15)
1.一种单部分可缩合固化甲硅烷基改性聚合物基密封剂组合物,其包含:-
(a)甲硅烷基改性有机聚合物,每个分子具有至少两个(R)m(Y1)3-m-Si基团,其中每个R为羟基或可水解基团,每个Y1为含有1至8个碳的烷基并且m为1、2或3,所述有机聚合物选自聚醚、烃聚合物、丙烯酸酯聚合物、聚酯、聚氨酯和聚脲;
以及
(b)增强填料
(c)一种或多种增塑剂
以及
(d)催化剂,其包含(i)钛酸酯和/或锆酸酯和(ii)金属羧酸盐。
2.一种根据权利要求1所述的单部分室温可硫化(RTV)有机硅组合物,其中催化剂(d)的金属羧酸盐(ii)的金属选自锌、铝、铋和/或锆中的一种或多种。
3.根据前述权利要求中任一项所述的单部分可缩合固化甲硅烷基改性聚合物基密封剂组合物,其中催化剂(d)的所述金属羧酸盐(ii)选自羧酸锌(II)、羧酸铝(III)、羧酸铋(III)和/或羧酸锆(IV)、烷基羧酸锌(II)、烷基羧酸铝(III)、烷基羧酸铋(III)和/或烷基羧酸锆(IV)或其混合物。
4.根据前述权利要求中任一项所述的单部分可缩合固化甲硅烷基改性聚合物基密封剂组合物,其中催化剂(d)的所述金属羧酸盐(ii)选自乙基己酸锌、乙基己酸铋硬脂酸锌、十一碳烯酸锌、新癸酸锌和2-乙基己酸铁(III)。
5.根据前述权利要求中任一项所述的单部分可缩合固化甲硅烷基改性聚合物基密封剂组合物,其中催化剂(d)的钛酸酯和/或锆酸酯(i)和金属羧酸盐(ii)以1:4至4:1的摩尔比提供。
6.一种单部分可缩合固化甲硅烷基改性聚合物基密封剂组合物,其包含:其中聚合物(a)为用以下封端的聚醚
(R)m(Y1)3-m-Si-D-[NH-C(=O)]k-
其中每个R为羟基或可水解基团,每个Y1为含有1至8个碳的烷基,m为1、2或3,D为二价C2-6亚烷基并且k为1或0。
7.根据权利要求4所述的单部分可缩合固化甲硅烷基改性聚合物基密封剂组合物,其中k为0。
8.根据根据前述权利要求中任一项所述的单部分可缩合固化甲硅烷基改性聚合物基密封剂组合物,其为可喷涂的和/或自流平的。
9.根据前述权利要求中任一项所述的单部分可缩合固化甲硅烷基改性聚合物基密封剂组合物,其能够作为糊剂施加到两个相邻基材表面之间的接缝,其中在固化之前,所述密封剂组合物能够在所述接缝处被加工以提供表面平滑的料团,所述料团将保持在指定位置直到固化成粘合到所述相邻基材表面的弹性体。
10.一种有机硅弹性体,其为根据权利要求1至9中任一项所述的组合物的固化反应产物。
11.根据权利要求10所述的有机硅弹性体,其在固化后提供具有在100%伸长率下≤0.45MPa的低模量和/或具有≥80%的弹性恢复率的密封剂。
12.一种制造根据权利要求1至9中任一项所述的单部分可缩合固化甲硅烷基改性聚合物基密封剂组合物的方法,其通过将所有成分混合在一起进行。
13.一种包含根据权利要求1至7中任一项所述的单部分可缩合固化甲硅烷基改性聚合物基密封剂组合物的用途,其在外墙、绝缘玻璃、窗户建造、汽车、太阳能和建造领域中作为密封剂。
14.一种用于填充两个基材之间的空间以便在其间产生密封的方法,其包含:
a)提供根据权利要求1至9中任一项所述的单部分可缩合固化甲硅烷基改性聚合物基密封剂组合物,和
b)将有机硅组合物施加到第一基材,并且使第二基材与已施加到所述第一基材的所述有机硅组合物接触,或
c)用所述有机硅组合物填充由第一基材和第二基材的排列形成的空间并且固化所述有机硅组合物。
15.根据权利要求14所述的用于填充两个基材之间的空间的方法,其中通过借助于挤出或通过密封剂枪引入根据权利要求1至9中任一项所述的单部分可缩合固化甲硅烷基改性聚合物基密封剂组合物来填充所述空间。
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CN116194524A (zh) * | 2020-09-25 | 2023-05-30 | 三键有限公司 | 湿气固化性树脂组合物以及固化物 |
CN113980630B (zh) * | 2021-11-08 | 2023-08-18 | 张一平 | 基于甲硅烷基改性聚合物的工业创可贴的制备方法 |
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