CN109651916A - 水性阻尼组合物 - Google Patents

水性阻尼组合物 Download PDF

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CN109651916A
CN109651916A CN201811167709.5A CN201811167709A CN109651916A CN 109651916 A CN109651916 A CN 109651916A CN 201811167709 A CN201811167709 A CN 201811167709A CN 109651916 A CN109651916 A CN 109651916A
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aqueous
damping composition
weight
acid
aqueous damping
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K·K·拜科尔里卡
R·E·德鲁姆赖特
付振文
J·欣巴尔
C·F·戈兰
M·兰吉尔
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Dow Global Technologies LLC
Rohm and Haas Co
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Abstract

本发明提供一种水性声音和振动阻尼组合物,其包括水性乳液聚合物,所述聚合物的计算酸值为2到100;固体按乳液聚合物固体计,0.1%到50%的某些沸点高于150℃的液体化合物;和PVC含量为25%到85%的固体填料;其中所述水性阻尼组合物的含水量为6重量%到25重量%。还提供了使用所述水性阻尼组合物提供涂布衬底的方法和如此涂布的衬底。

Description

水性阻尼组合物
本发明涉及一种水性阻尼组合物。本发明特别涉及一种水性液体声音阻尼组合物,一种向衬底提供声音和振动阻尼的方法以及一种用所述方法形成的涂布衬底。更具体地说,本发明涉及一种水性阻尼组合物,它包括:水性乳液聚合物,所述聚合物的计算酸值为2到100;固体按乳液聚合物固体计,0.1%到50%的沸点高于150℃的液体化合物,其选自由酸基反应性液体化合物和非酸基反应性液体化合物或其混合物组成的群组;和固体填料;其中水性阻尼组合物的PVC为25%到85%;并且其中水性阻尼组合物的含水量为6重量%到25重量%。
本发明用于提供水性阻尼组合物,即水性液体声音和振动阻尼组合物,将阻尼组合物涂覆到衬底上的方法和如此形成的涂布衬底,相对于非本发明的乳液聚合物类涂层,干燥涂层优选具有显着改善的防水性、良好的外观特性和良好的阻尼特征。
美国专利申请案第2016/0168411 A1号和第2016/0168413 A1号公开非水性涂层组合物,其测量固体含量大于95%,包括用于声音和振动阻尼和防水性的聚合物组分和反应性稀释剂。
然而,仍然需要水性液体声音和振动阻尼组合物。已提供一种包括水性乳液聚合物的水性阻尼组合物,其相对于常规水性涂层在干燥/固化时具有改善的防水性。水性阻尼组合物还提供最小的环境和安全问题。此外,相对于非水性涂层,水性涂层的给定厚度更轻,这有利于需要轻质材料的汽车应用;这是由于这样的事实:这类应用的优选烘焙工艺引起涂层的膨胀和声音阻尼的已知厚度依赖性。本发明人面临的问题是提供一种水性液体声音阻尼组合物,其作为干燥/固化涂层具有理想水平的声音阻尼效能、外观和防水性。
在本发明的第一方面,提供一种水性阻尼组合物,其包含:水性乳液聚合物,所述聚合物的计算酸值为2到100;固体按乳液聚合物固体计,0.1%到50%的沸点高于150℃的液体化合物,其选自由酸基反应性液体化合物和非酸基反应性液体化合物组成的群组;和固体填料;其中所述水性阻尼组合物的PVC为25%到85%;并且其中所述水性阻尼组合物的含水量为6重量%到25重量%。
在本发明的第二方面,提供一种提供涂布衬底的方法,其包含(a)形成水性阻尼组合物,所述组合物包含:水性乳液聚合物,所述聚合物的计算酸值为2到100;固体按乳液聚合物固体计,0.1%到50%的沸点高于150℃的液体化合物,其选自由酸基反应性液体化合物和非酸基反应性液体化合物组成的群组;和固体填料;其中所述水性阻尼组合物的PVC为25%到85%;并且其中所述水性阻尼组合物的含水量为6重量%到25重量%;(b)将所述水性阻尼组合物涂覆到衬底上;以及(c)在25℃到250℃的温度下干燥所述被涂覆的水性阻尼组合物。
在本发明的第三方面中,提供由本发明的第二方面的方法形成的涂覆衬底。
本发明的水性阻尼组合物包括水性乳液聚合物,所述聚合物的计算酸值为2到100,或者2到65。本文的“水性”是指水性阻尼组合物和水性乳液聚合物各自具有由70重量%到100重量%的水构成的单一连续相。所述相中任选的其它成分通常可与水混溶。“乳液聚合物”是指在水性乳液聚合过程中通过烯系不饱和单体的自由基加成聚合制备的聚合物。乳液聚合物的计算酸值为2到100,或者2到65。本文的“酸值”是通过测定干燥乳液聚合物固体中每克酸的毫当量数并且乘以氢氧化钾的分子量来计算的。乳液聚合物的酸值通过一种或多种选自包括以下的群组的含酸基单体的共聚来提供:羧酸单体、含硫酸基单体、含磷酸基单体、其各基团的盐和任何前述单体的混合物。典型的羧酸单体包括例如丙烯酸、甲基丙烯酸、巴豆酸、衣康酸、富马酸、马来酸、衣康酸单甲酯、富马酸单甲酯、富马酸单丁酯和马来酸酐。典型的含硫单体包括例如2-丙烯酰胺基-2-甲基-1-丙磺酸、(甲基)丙烯酸磺乙酯和乙烯基磺酸和苯乙烯磺酸钠。典型的含磷酸单体包括磷酸二氢酯官能单体,如醇的磷酸二氢酯,其中醇还含有可聚合的乙烯基或烯烃基团,如磷酸烯丙酯,双(羟基-甲基)富马酸酯或衣康酸酯的单或二磷酸酯,(甲基)丙烯酸酯的衍生物,例如(甲基)丙烯酸羟烷基酯的磷酸酯,包括(甲基)丙烯酸2-羟乙酯和(甲基)丙烯酸3-羟丙酯等。其它适合的亚磷酸单体包括CH2=C(R)-C(O)-O-(R1O)n-P(O)(OH)2,其中R=H或CH3且R1=alkyl,如可以从Rhodia,Inc.获得的SIPOMERTMPAM-100、SIPOMERTMPAM-200、SIPOMERTMPAM-300和SIPOMERTMPAM-4000。其它合适的含磷酸单体是公开在WO 99/25780A1中的膦酸酯官能单体,并且包括乙烯基膦酸、烯丙基膦酸、2-丙烯酰胺基-2-甲基丙烷膦酸、α-膦酰基苯乙烯、2-甲基丙烯酰胺基-2-甲基丙烷膦酸。更合适的含磷单体是Harcross T-Mulz 1228和公开在US4,733,005的1,2-烯系不饱和(羟基)氧膦基(甲基)丙烯酸酯单体,并且包括甲基丙烯酸(羟基)氧膦基甲脂。优选的磷酸单体是磷酸二氢单体,其包括2-(甲基)丙烯酸磷酸乙酯、2-(甲基)丙烯酸磷酸丙酯、3-(甲基)丙烯酸磷酸丙酯和(甲基)丙烯酸3-二氧磷基-2-羟丙酯。优选的是2-(甲基)丙烯酸磷酸乙酯、2-(甲基)丙烯酸磷酸丙酯、3-(甲基)丙烯酸磷酸丙酯、(甲基)丙烯酸3-磷酸基-2-羟丙酯、SIPOMERTMPAM-100和SIPOMERTMPAM-200。
除含酸基单体之外,本发明的乳液聚合物包括至少一个非离子共聚的单烯系不饱和单体,例如包括(甲基)丙烯酸甲酯、(甲基)丙烯酸乙酯、(甲基)丙烯酸丁酯、(甲基)丙烯酸2-乙基己酯、(甲基)丙烯酸癸酯的(甲基)丙烯酸酯单体;(甲基)丙烯酸酯羟烷基酯,如(甲基)丙烯酸羟乙酯和(甲基)丙烯酸羟丙酯以及其烷氧基化类似物;脲基官能(甲基)丙烯酸酯和(甲基)丙烯酸的乙酰乙酸酯、乙酰胺或氰基乙酸酯;苯乙烯或经取代的苯乙烯;乙烯基甲苯;单烯系不饱和苯乙酮或二苯甲酮衍生物,例如美国专利第5,162,415号中教导的;乙酸乙烯酯或其它乙烯基酯;乙烯基单体,如氯乙烯、偏二氯乙烯和N-乙烯基吡咯酮;以及(甲基)丙烯腈。如贯穿本发明中所使用的如(甲基)丙烯酸酯或(甲基)丙烯酰胺等术语“(甲基)”后接另一术语的使用分别是指丙烯酸酯和甲基丙烯酸酯两者以及丙烯酰胺或甲基丙烯酰胺。
在各种实施例中,按共聚的多烯系不饱和单体的乳液聚合物固体的重量计,乳液聚合物包括0重量%到6重量%;或在替代方案中,0重量%到1重量%;或0重量%到0.2重量%。在某些实施例中,乳液聚合物独立地不含共聚的多烯系不饱和单体。多烯系不饱和单体包括例如(甲基)丙烯酸烯丙酯、邻苯二甲酸二烯丙酯、丁二烯、1,4-丁二醇二(甲基)丙烯酸酯、1,2-乙二醇二(甲基)丙烯酸酯、1,6-己二醇二(甲基)丙烯酸酯和二乙烯基苯。
乳液聚合物的计算所得的玻璃转移温度(“Tg”)典型地为0℃到110℃、优选5℃到70℃。据信,所需的阻尼温度范围取决于乳液聚合物计算所得的Tg。通过使用福克斯方程式(T.G.Fox,物理学会公报(Bull.Am.Physics Soc.),第1卷,第3期,第123页(1956))计算得出聚合物Tg,即,用于计算单体M1和M2的共聚物的Tg,
1/Tg(计算值)=w(M1)/Tg(M1)+w(M2)/Tg(M2)
,其中
Tg(计算值)是针对共聚物所计算的玻璃转化温度
w(M1)是单体M1在共聚物中的重量分率
w(M2)是单体M2在共聚物中的重量分率
Tg(M1)是M1的均聚物的玻璃转化温度
Tg(M2)是M2的均聚物的玻璃转化温度,
所有温度以°K为单位。
均聚物的玻璃化转变温度可见于例如《聚合物手册(Polymer Handbook)》,由J.Brandrup和E.H.Immergut主编,Interscience Publishers出版。
水性乳液聚合物理想地具有以重量计的大于50%的固体含量;优选地,固体含量以重量计大于56%。
用于制备此类水性乳液聚合物的聚合技术在所属领域中是众所周知的,例如如美国专利第4,325,856;4654397;以及4,814,373号中所公开的那些。可以使用常规表面活性剂,例如阴离子型和/或非离子乳化剂,例如碱金属或铵烷基硫酸盐、烷基磺酸、脂肪酸以及氧乙基化烷基酚。以总单体的重量计,所用表面活性剂的量通常是0.1重量%到6重量%。可使用热引发方法或氧化还原引发方法。可以使用常规自由基引发剂,例如过氧化氢、氢过氧化叔丁基、氢过氧化叔戊基、铵和/或碱金属过硫酸盐,以总单体的重量计,含量典型地为0.01重量%到3.0重量%。使用与适合的还原剂(如甲醛次硫酸钠、亚硫酸氢钠、异抗坏血酸、羟胺硫酸盐以及亚硫酸氢钠)偶合的相同引发剂的氧化还原系统可以按类似的含量使用,任选地与例如铁和铜的金属离子组合,任选地进一步包括金属络合剂。优选氧化还原方法。针对某一阶段的单体混合物可以纯净地或以在水中的乳液形式添加。针对某一阶段的单体混合物可以使用均匀的或不同的组合物按单次添加或多次添加的方式或经分配给所述阶段的反应时间段连续地添加;优选的是以单次添加的形式添加第一和/或第二聚合物单体乳液。可在任一阶段之前、期间或之后添加额外成分,例如自由基引发剂、氧化剂、还原剂、链转移剂、中和剂、表面活性剂以及分散剂。
中和剂可选自无机碱,如氢氧化钠、氢氧化钾、磷酸盐、例如羟烷基胺的有机胺胺以及氨。
通过促进不同颗粒形态的多阶段过程形成乳液聚合物在所属领域中是众所周知的并且也涵盖于本发明中;在这种情况下,总乳液聚合物的酸值与可能存在于颗粒内的各种组合物无关地测定。
乳液聚合聚合物颗粒的平均粒径典型地为30到500纳米、优选80到200纳米。例如,可以替代地采用产生多峰粒径分布的方法,如美国专利第4,384,056和4,539,361号中公开的那些方法。
按乳液聚合物固体的固体计,本发明的水性阻尼组合物还包括0.1%到50%、优选1%到20%、更优选3%到10%的沸点高于150℃、或者高于175℃、或者进一步高于200℃的液体化合物。如根据ASTM D445测量,在25℃下液体粘度通常低于25,000mPa*s,优选低于16,000mPa*s。液体化合物选自由酸基反应性液体化合物和非酸基反应性液体化合物组成的群组。“酸基反应性液体化合物”在本文中是指与乳液聚合物的酸基单体的反应程度在150℃的温度下在30分钟内大于化学计量潜在反应的5%。“非酸基反应性液体化合物”在本文中是指与乳液聚合物的酸基单体的反应程度为在150℃的温度下在30分钟内为化学计量潜在反应的0%到5%。典型的非酸基反应性液体化合物包括通常已知的化合物,例如聚结剂和塑化剂。本文中的塑化剂和聚结剂是指降低乳液聚合物的最低成膜温度的液体化合物。典型的酸基反应性液体化合物包括官能化合物,例如环氧官能树脂。优选的是环氧官能树脂,其计算环氧当量重量为105到250。计算环氧当量重量是按树脂的标称结构计,通过将环氧官能树脂的总分子量除以环氧官能树脂中的环氧基的数量来确定的。对于两种或更多种环氧树脂的混合物,优选每种组分的计算环氧当量在要求保护的范围内。液体化合物本身可以是水性分散体,并且可以直接加入乳液聚合物中或加入含填料的乳液聚合物中。
本发明的水性阻尼组合物包括固体填料,其含量使得水性阻尼组合物的颜料体积浓度百分比(“PVC”)为25%到85%,优选50%到85%。
颜料体积浓度通过下式计算:
典型的填料包括例如无机粒子,如碳酸钙、二氧化硅、高岭土、硅酸盐、氧化铁等;有机颗粒,如聚合物颗粒,例如聚苯乙烯和聚氯乙烯珠粒、可膨胀聚合微球、合成或天然纤维和含有空隙或囊泡的微球颜料。微球颜料包括含有一个或多个空隙的聚合物颗粒,例如ROPAQUETM不透明聚合物和囊状聚合物颗粒。
水性阻尼组合物的含水量为6重量%到25重量%,优选为6重量%到20重量%,更优选为6重量%到16重量%。
水性阻尼组合物通过涂层技术中众所周知的技术来制备。首先,将一种或多种填料分散在水性介质中或使用预分散的填料或其混合物。然后根据需要在低剪切搅拌下加入水性乳液聚合物以及其它涂层助剂。或者,乳液聚合物可以在分散阶段期间与填料一起存在。液体化合物可以在任何阶段加入。除此之外,水性阻尼组合物还可含有常规涂层助剂,例如防冻剂、固化剂、缓冲剂、中和剂、增稠剂、流变改性剂、保湿剂、润湿剂、杀生物剂、消泡剂、UV吸收剂、荧光增量剂、光或热稳定剂、杀生物剂、螯合剂、分散剂、着色剂、蜡、防水剂和抗氧化剂。
水性阻尼组合物通常涂覆于衬底上,例如金属、塑料、预先涂漆或涂底漆的表面和风化表面。水性阻尼组合物可以使用常规的涂层涂覆方法涂覆到衬底上,所述方法例如空气雾化喷涂、空气辅助喷涂、无空气喷涂、高体积低压喷涂和空气辅助无气喷涂。
水性阻尼组合物的干燥可以例如在25℃到250℃下、优选在从100℃到200℃下进行。不与特定理论结合,期望在某些实施例中,水性乳液聚合物的酸基与液体化合物的反应性基团反应,例如与环氧树脂的环氧官能团反应,优选在例如150℃到180℃的温度下反应,这反过来产生干燥水性阻尼组合物的改善的防水性。
呈现以下非限制性实例以说明本发明。
测试方法:
防水性
通过将4mm湿厚度、100mm长度和80mm宽度的水性阻尼样品拉到铝板上来评估吸水性。使样品在室温下干燥预定量的0-48小时的时间,并且然后置于150℃的烘箱中30分钟。通过在烘焙之前和之后称重样品来测量配制物中的质量%水。将样品在环境室温下冷却并且完全浸没在自来水中达48小时。轻轻擦拭涂层的板和外部。据报道,在24和48小时后,吸水性以涂层质量的百分比报告。
干燥阻尼涂层的外观
按下文定义的1-10的等级评估外观。
10:无痕迹表面缺陷
8:轻度凸起,凹坑,孔/针孔
6:中度凸起,凹坑,孔/针孔
4:重度凸起,凹坑,孔/针孔
2:严重凸起,凹坑,孔/针孔
振动阻尼
复合损耗因子(CLF)是振动阻尼的量度。按照ASTM e-757,通过在1.6mm厚×12.7mm宽×200mm长的硬化碳钢Oberst棒上形成涂层来评估CLF。报告了200Hz频率插值的CLF曲线。由于CLF取决于覆盖率,因此数据图例中报告了涂层覆盖率和厚度。
其中:
CLF:复合损耗因子(无量纲)
A:常数(无量纲)
E'涂层:粘弹性层的储存模量(MPa)
E'衬底:衬底的储存模量(MPa)
h涂层:粘弹性层的厚度(mm)
h衬底:衬底的厚度(mm)
Tanδ涂层:粘弹性层的Tanδ(无量纲)
实例中使用的环氧树脂.
实例1(比较).不含液体化合物的水性涂层组合物
使用标准顶置式混合器将包括共聚的甲基丙烯酸磷酸乙酯并且计算所得酸值为7.6(50%固体)的80g水性乳液聚合物、0.5g BYK-093(BYK)、0.32gBAYFERROXTM318M、125gTITANTM-200、0.3g EXPANCELTM031WUFX40和4g KOLLOTEXTM1500混合在一起15分钟。在进一步混合下加入0.4g的ACRYSOLTMRM12-W。
实例2-10.根据比较实例1的方法制备水性阻尼组合物,不同之处在于包括135g的TITANTM-200(以增加用于添加成分的填料随后以保持PVC相同),并且也在混合下分别添加4g邻苯二甲酸二异壬酯(DINP)、OPTIFILMTM400、三乙二醇山梨酸酯(如WO 2015157929A1中所描述)、HELOXYTM61,HELOXYTM62,HELOXYTM67,HELOXYTM68,HELOXYTM48或C8-C10烷基缩水甘油醚(西格玛奥德里奇公司(Sigma Aldrich))。
根据比较实例1的方法制备实例11,但在混合下也加入152g的TITANTM-200和4g的HELOXYTM61。
根据比较实例1的方法制备实例12(比较)和13(比较),但分别加入98g或140g的DURCALTM-10以调节PVC。
实例14.比较实例1、7-9和12-13以及本发明的实例2-6和10-11在0小时开放时的吸水效能。
实例 %水 PVC 外观 WPU 24小时. WPU 48小时.
1(比较) 22 55 4 15.1+/-5.3 27.3+/-4.6
2 15 55 7 4.9+/-1.4 7.5+/-0.8
3 15 55 7 3.6+/-0.9 5.5+/-0.1
4 15 55 5 1.7+/-0.2 2.2+/-0.3
5 15 55 4 0.6+/-0.1 0.8+/-0.2
6 15 55 5 1.1+/-0.1 1.9+/-0.2
7 15 55 7 24.9+/-0.8 34.8+/-3.4
8 15 55 4 9.5+/-1.3 17.5+/-2.1
9 15 55 6 14.8+/-1.7 27.7+/-4.6
10 15 55 5 1.6+/-0.1 2.4+/-0.3
11 15 58 6 0.6+/-0.1 0.6+/-0.1
12(比较实例) 24 50 1 1.2+/-0.1 1.5+/-0.3
13(比较实例) 19 58 7 22.3+/-3.8 45.3+/-4.5
实例2-11提供相对于比较实例改善的效能。实例7和9相对于比较实例1提供改善的外观,但没有改善的吸水性并且不是优选的组合物。
实例15.比较实例1和实例2-5的CLF效能
本发明的实例2-5提供理想水平的阻尼效能。
实例16-20干燥水性组合物的吸水性评估,实例包括包含共聚的甲基丙烯酸磷酸乙酯并且计算所得酸值为8.4的水性乳液聚合物和二环氧官能液体化合物(D.E.R.331)。
表16.1水性组合物
本发明的实例17-20提供相对于不含液体化合物(双官能环氧树脂)的比较实例16具有优异吸水性结果的干燥涂层。
注意:ACRYSOLTM、TAMOLTM和ROPAQUETM是陶氏化学公司(The DowChemicalCompany)的商标。BAYFERROXTM是朗盛集团(Lanxess AG)的商标。TITANTM和DURCALTM是奥米亚公司(Omya Inc.)的商标。EXPANCELTM是阿克苏诺贝尔(AkzoNobel N.V.)的商标。KOLLOTEXTM是阿维贝有限公司(Avebe GmbH)的商标。OPTIFILMTM是伊士曼化学公司(Eastman ChemicalCompany)的商标。HELOXYTM是希森公司(Hexion,Inc.)的商标。UCDTM是Chromaflo Technologies的商标。HUBERCARBTM是JM胡贝尔公司(JM HuberCorp.)的商标。PENFORDTM是彭兰产品公司(Penland Products Co.)的商标。

Claims (11)

1.一种水性阻尼组合物,其包含:
水性乳液聚合物,所述聚合物的计算酸值为2到100;
固体按乳液聚合物固体计,0.1%到50%的沸点高于150℃的液体化合物,其选自由酸基反应性液体化合物和非酸基反应性液体化合物组成的群组;和固体填料;
其中所述水性阻尼组合物的PVC为25%到85%;并且其中所述水性阻尼组合物的含水量为6重量%到25重量%。
2.根据权利要求1所述的水性阻尼组合物,其中所述聚合物的计算酸值为2到65。
3.根据权利要求1所述的水性阻尼组合物,其中所述水性阻尼组合物的含水量为6重量%到20重量%。
4.根据权利要求1所述的水性阻尼组合物,其中所述酸基反应性液体化合物是环氧官能树脂,其计算环氧当量重量为105到250。
5.一种用于提供涂覆衬底的方法,其包含:
(a)形成水性阻尼组合物,所述组合物包含:
水性乳液聚合物,所述聚合物的计算酸值为2到100;固体按乳液聚合物固体计,0.1%到50%的沸点高于150℃的液体化合物,其选自由酸基反应性液体化合物和非酸基反应性液体化合物组成的群组;和固体填料;
其中所述水性阻尼组合物的PVC为25%到85%;并且其中所述水性阻尼组合物的含水量为6重量%到25重量%;
(b)将所述水性阻尼组合物涂覆到衬底上;并且
(c)在25℃到250℃的温度下干燥所述涂覆的水性阻尼组合物。
6.根据权利要求5所述的用于提供涂布衬底的方法,其中所述聚合物的酸值为2到65。
7.根据权利要求5所述的用于提供涂布衬底的方法,其中所述水性阻尼组合物的含水量为6重量%到25重量%。
8.根据权利要求5所述的用于提供涂布衬底的方法,其中所述酸基反应性液体化合物是环氧官能树脂,其计算环氧当量重量为105到250。
9.一种涂覆衬底,其由根据权利要求5所述的方法形成。
10.根据权利要求9所述的涂布衬底,其中所述涂层的48小时吸水性小于25重量%。
11.根据权利要求9所述的涂布衬底,其中所述涂层的24小时吸水性小于15重量%。
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