CN104277702B - 具有刮擦自恢复特性的涂料组合物 - Google Patents
具有刮擦自恢复特性的涂料组合物 Download PDFInfo
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- CN104277702B CN104277702B CN201310751542.8A CN201310751542A CN104277702B CN 104277702 B CN104277702 B CN 104277702B CN 201310751542 A CN201310751542 A CN 201310751542A CN 104277702 B CN104277702 B CN 104277702B
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Abstract
本发明公开的是一种涂料组合物,且更具体地是具有缩短的干燥时间和延长的适用期的刮擦自恢复涂料组合物,其基于该涂料组合物的总重包括:约30~40重量%的支链聚酯树脂;约30~40重量%的丙烯基多元醇树脂;约0.2~0.5重量%的反应催化剂;和约0.99~9.0重量%的反应延缓剂。
Description
相关申请的交叉引用
根据35U.S.C.§119(a),本申请要求2013年7月5日提交的韩国专利申请第10-2013-0079145号的权益,其全部内容并入本文以供参考。
技术领域
本公开涉及具有可控固化速率且提供有刮擦自恢复特性的涂料组合物。更具体地,本发明的涂料组合物具体通过包括支链聚酯树脂、丙烯基多元醇树脂、固化剂、光稳定剂和反应催化剂等的组合而具有缩短的干燥时间和延长的适用期。
背景技术
近来,对提供具有黑色高光泽面漆的车辆内部部件的需求不断增加。然而,任何出现在该高光泽面漆中的刮擦均会降低车辆的商用价值且是消费者抱怨增加的原因。
通常,汽车内部部件等上出现的大多数刮擦是由于消费者导致的正常磨损和撕裂。因此,正在进行使刮擦的出现最小化的研究,以便保持所期望的汽车内部部件的外观。
关于此,在日本专利公开第2000-293895号中描述了通过增加涂料膜硬度或通过使用纳米级二氧化硅或氧化铝增加硬度来尝试避免刮擦出现的方法。然而,这些方法防止刮擦的能力有限。如此,还没有充分解决刮擦的问题。
韩国专利公开第10-0643335号描述了通过使用聚氨酯分子结构的弹性而具有刮擦自恢复性能的材料,该聚氨酯分子结构通过使丙烯基、脂肪族聚酯等与异氰酸酯进行反应而制得。然而,使用所描述的组合物,涂层的物理特性降低,且涂层不满足用于机动车内部部件所需的物理特性。而且,所描述组合物的干燥速率降低,且存在难以在工业中使用该组合物的问题。
发明内容
本发明致力于解决上述与现有技术相关的问题。更具体地,本发明提供一种涂料组合物,其使得可以缩短干燥时间并控制其适用期。具体地,本发明通过加快反应,通过使用支链聚酯树脂来使弹性最大化,使用硬丙烯基多元醇树脂来提高物理特性,使用固化剂来提高固化速率,并使用反应催化剂来促进反应等,来提供这样的优势。
根据一方面,本发明提供刮擦自恢复涂料组合物,其相对于所述涂料组合物的总重包括:约30~40重量%的支链聚酯树脂;约30~40重量%的丙烯基多元醇树脂;约0.2~0.5重量%的反应催化剂;和约0.99~9.0重量%的反应延缓剂。根据本发明,涂料组合物相对于常规的组合物具有缩短的干燥时间和延长的适用期。
用作反应催化剂和反应延缓剂的各种材料不特别限定且通常是任何与其他组分相容的材料。根据优选的实施方式,反应催化剂是二月桂酸二丁基锡,而反应延缓剂是二酮化合物。一个特别适用于本组合物的示例性二酮化合物是2,4-戊二酮。
优选的是涂料组合物相对于所述涂料组合物的总重额外包括约20~30重量%的固化剂,以便涂料组合物的固化。可适当地使用任何常规的固化剂,且根据优选实施方式,固化剂是以合适的重量比混合的六亚甲基二异氰酸酯三聚体和六亚甲基二异氰酸酯脲基甲酸酯三聚体,例如约1:1~3的重量比。
进一步优选的是涂料组合物包括约0.5~2重量%的光稳定剂以避免涂料膜因长期暴露于光而导致的老化和/或变色等。可适当地使用任何常规的固化剂,且根据优选实施方式,光稳定剂是以合适的重量比混合的400(液体羟基苯基三嗪(HPT)UV吸收剂)和292,例如约2~3:1的重量比。
具有所述组成的本发明的效果具体通过与常规的聚酯树脂相比使氨基甲酸酯键最大化而能够使经由组合物的弹性提供的恢复力最大化。根据特别优选的实施方式,这通过使用支链聚酯树脂和多官能异氰酸酯来实现。
本文提及的“自恢复”指的是涂料膜/涂层中形成的刮擦、瑕疵等(其中自恢复的刮擦、瑕疵等在本文中统称为“刮擦”)随时间被自动修复的特性。本发明的涂料组合物进一步的优势在于其具体通过包括作为硬树脂的丙烯基多元醇树脂等来提供有满足用于汽车内部材料所需水平的物理特性。
而且,本发明的涂料组合物具有可通过使用催化剂缩短组合物的干燥时间且进一步还可延长适用期的效果。
此外,本发明的涂料组合物是有利的,因为它提供多重优势,例如,适用期延长,通过提供刮擦和其他瑕疵的自恢复特性来增加所涂覆的内部材料的寿命,以及内部材料的高光泽面漆可保持较长时间而无需任何额外成本(例如,用于恢复、替换)等。
根据以下具体实施方式、附图和权利要求书,本发明的其他特征和方面将更为明显。
附图说明
现在将参考附图图示的本发明的某些示例性实施方式来详细地描述本发明的上述和其它特征,下文给出的这些实施方式仅仅用于示例说明,因此不是对本发明的限制,其中:
图1是应用根据本发明的实施方式的涂料组合物的样品的表面照片,其中刮擦是人工制造的;并且
图2是24小时过去后的图1样品的表面照片。
应当理解到,所附的附图并非必然是按比例的,其说明了本发明基本原理的各种优选特征的一定程度上简化的代表。
在附图中,附图标记在几张图中通篇指代本发明的相同或等同部件。
具体实施方式
下面将详细地参照本发明的各个实施方式,其实施例图示在所附附图中,并在下文加以描述。
在本申请的说明书和权利要求中使用的术语或词语,不应被理解为限于常规的或词典意思,而应基于发明者能适当地定义术语的概念以便以最好的方式解释其发明的原理而理解为符合技术精神的意思和概念。
应理解,本文使用的术语“车辆”或“车辆的”或其它类似术语包括通常的机动车,例如,包括多功能运动车(SUV)、公共汽车、卡车、各种商务车的客车,包括各种船只和船舶的水运工具,飞行器等等,并且包括混合动力车、电动车、插入式混合电动车、氢动力车和其它代用燃料车(例如,来源于石油以外的资源的燃料)。如本文所提到的,混合动力车是具有两种或多种动力源的车辆,例如,具有汽油动力和电动力的车辆。
本文使用的术语仅仅是为了说明具体实施方式的目的而不是意在限制本发明。如本文所使用的,单数形式“一个、一种(a、an)”和“该(the)”也意在包括复数形式,除非上下文中清楚指明。还可以理解的是,在说明书中使用的术语“包括(comprises和/或comprising)”是指存在所述特征、整数、步骤、操作、元件和/或部件,但是不排除存在或添加一个或多个其它特征、整数、步骤、操作、元件、部件和/或其群组。如本文所使用的,术语“和/或”包括一个或多个相关所列项目的任何和所有组合。
除非特别说明或从上下文明显得到,否则本文所用的术语“约”理解为在本领域的正常容许范围内,例如在均值的2个标准偏差内。“约”可以理解为在所述数值的10%、9%、8%、7%、6%、5%、4%、3%、2%、1%、0.5%、0.1%、0.05%或0.01%内。除非另外从上下文清楚得到,本文提供的所有数值都由术语“约”修饰。
以下,详细说明本发明。
本发明涉及的涂料组合物具有使所应用的涂料组合物(例如,涂料的膜或涂层)中形成的刮擦、瑕疵等随时间自恢复的功能。根据本发明的实施方式,涂料组合物包括支链聚酯树脂、丙烯基多元醇树脂、固化剂、光稳定剂和反应催化剂。而且,如果需要,还可包括如下进一步描述的额外的可选组分。
包括漆(paint)或釉质(enamel)等的涂料是树脂、颜料、固化剂和分散剂的混合物,且作为通用术语,涉及制作固体膜的可流动材料,在涂抹表面时保护表面并使其美观。
聚氨酯涂料是涉及具有氨基甲酸酯键(urethane bond)的涂料的通用术语,并根据使用目的分为醇酸多元醇、聚酯多元醇、聚酯改性丙烯基多元醇和丙烯基多元醇等。
本发明提供其中聚酯多元醇树脂和丙烯基多元醇树脂的羟基(-OH)与异氰酸酯基(-NCO)反应以形成氨基甲酸酯键(-NHCOO-)的涂料。这提供使涂料膜物理特性提高的聚氨酯涂料。
本发明的聚氨酯涂料具有即使在聚氨酯涂料因外力引起的刮擦等而变形(变化)之后,使该涂料强劲地恢复其原始状态的特性。具体地,本涂料因涂料膜的柔性而恢复其原始状态,该涂料膜的柔性通过固化后分子间的化学键形成三维网络结构而增加。而且,与热塑性弹性体相比,本涂料组合物针对变形或热具有较好的耐久性,并提供具有优异外观和优异涂料可加工性的涂料膜。
以下进一步详细说明本涂料膜的构成组分和含量。
1.构成组分
(1)支链聚酯树脂
通常,通过酸组分例如多元羧酸和/或其酸酐,与多元醇的缩合反应来得到聚酯树脂。
作为构成本发明的聚酯树脂的酸组分,通常使用多元酸组分,而在一些实施方式中,使用一元羧酸。多元酸组分包括芳香族二羧酸、脂肪族二羧酸或脂环族二羧酸等。
具体地,芳香族二羧酸优选包括对苯二甲酸、间苯二甲酸、邻苯二甲酸、无水邻苯二甲酸、萘二羧酸或联苯二甲酸等。
同样地,芳香族二羧酸优选包括饱和脂肪族二羧酸例如草酸、丙二酸、琥珀酸、无水琥珀酸、戊二酸、己二酸、庚二酸、辛二酸、壬二酸、癸二酸或月桂2酸和氢化二聚酸等,及不饱和的脂肪族二羧酸例如富马酸、马来酸、无水马来酸、衣康酸、无水衣康酸、柠康酸、无水柠康酸或二聚酸等。
而且,脂环族二羧酸优选包括1,4-环己烷二羧酸、1,3-环己烷二羧酸、1,2-环己烷二羧酸、2,5-降冰片烯二羧酸、无水2,5-降冰片烯二羧酸、四氢邻苯二甲酸或无水四氢邻苯二甲酸等。
作为构成聚酯树脂的醇组分,通常使用多价醇组分,且如果需要,可使用一元醇。例如,多价醇组分可以包括脂肪族二醇、脂环族二醇或含醚键二醇等。
根据优选的实施方式,脂肪族二醇包括乙二醇、1,2-丙二醇、1,3-丙二醇、1,4-丁二醇、2-甲基-1,3-丙二醇、1,5-戊二醇、新戊二醇、1,6-己二醇、3-甲基-1,5-戊二醇、1,9-壬二醇或2-乙基-2-丁基丙二醇等。
此外,脂环族二醇包括1,4-环己烷二甲醇等。
根据各种实施方式,含醚键二醇可包括双酚类(双酚A)的氧化乙烯加合物,例如二乙二醇、三乙二醇、二丙二醇和2,2-双[4-(羟基乙氧基)苯基]丙烷,双酚类(双酚S)的氧化乙烯加合物,例如双[4-(羟基乙氧基)苯基]砜、聚乙二醇、聚丙二醇或聚丁二醇等。
同时,由于仅用双官能醇化合物来合成支链聚酯树脂存在困难,所以优选包括支链单体例如三官能或更多官能的丙三醇、三羟甲基乙烷、三羟甲基丙烷和季戊四醇等中的至少一个。
支链单体的另一实例包括但不限于多官能酸或二醇等,例如,偏苯三甲酸(trimelitic acid)、偏苯三甲酸酐、均苯四甲酸(pyromelitic acid)二酐、三羟甲基丙烷、丙三醇、季戊四醇、柠檬酸、酒石酸或3-羟基戊二酸等。
优选地,支链单体包括选自偏苯三甲酸酐、均苯四甲酸酐、丙三醇、山梨醇、1,2,6-己烷三醇、季戊四醇、三羟甲基乙烷和均苯三甲酸中的至少一个组分。
这样的支链聚酯树脂能提供自恢复性能,其中在形成刮擦时通过弹性能够恢复所涂覆的涂料组合物的初始状态。具体地,这样的自恢复通过组合物发生,该组合物中在与聚异氰酸酯反应之后形成聚氨酯结构。
在这种情况下,基于涂料组合物的总重,优选在组合物中以约30~40重量%的量包括支链聚酯树脂,更优选约35重量%。进一步优选支链聚酯树脂的重均分子量为约4,000~7,000,且相对于支链聚酯树脂的总重,羟基含量优选为约4~6wt%。
如果在组合物中以小于30重量%的量包括支链聚酯树脂,涂料组合物的物理特性提高,但难以达到从刮擦/瑕疵中恢复的性能。另一方面,如果支链聚酯树脂的量超过40重量%,可加工性可能因涂料膜粘性(stickiness)出现而降低,且由于反应性降低,在一般的干燥条件下难以产生充足的氨基甲酸酯键。
(2)丙烯基多元醇树脂
丙烯基多元醇树脂是由具有羟基(-OH)的丙烯基单体、苯乙烯单体等共聚而成的聚合物。通常,可通过在自由基聚合引发剂的存在下进行的各种可聚合单体和具有羟基的丙烯基单体的溶液聚合过程制备丙烯基多元醇树脂。包括丙烯基多元醇树脂的涂料组合物的物理特性受所使用的丙烯基单体的类型、组成比率(即加入的丙烯基单体的相对量)、分子量和羟值等的影响。通常,包括丙烯基多元醇树脂的这样的涂料组合物具有例如快速干燥时间、优异耐候性、优异耐化学性和优异机械特性等特性。
这样的丙烯基多元醇树脂在补充支链聚酯树脂组分缺乏的物理特性中起作用,且因此能够通过组分的适当组合来对用于机动车的衬里/内部部件提供必要的物理特性。
根据各种实施方式,基于涂料组合物的总重优选以约30~40%的量包括丙烯基树脂。如果丙烯基树脂的量小于10重量%,则组合物的粘性增加,因此由此形成的涂层的硬度会降低。另一方面,如果丙烯基树脂的量大于30重量%,则刮擦的恢复性能降低并且膜的碰撞和弯曲可导致涂料膜中的开裂。
根据各种实施方式,优选使用重均分子量(Mw)在约6,000~15,000范围内、酸值为约3~10mg/KOH、羟基含量为约1~5%且玻璃化转变温度为约40~50℃的丙烯基树脂,以使涂料膜的粘合性(adhesion)最小化。优选地,基于丙烯基树脂的重量,丙烯基树脂具有约40重量%或更多的固体含量。根据优选的实施方式,丙烯基树脂是通过使用热分解引发剂、由具有乙烯基型双键的单体例如丙烯酸酯和甲基丙烯酸酯的自由基溶液聚合而制备的产物。
(3)固化剂
加入上述固化剂以帮助固化涂料组合物。可适当地使用任何常规固化剂。根据优选的实施方式,固化剂是具有优异的无黄铁矿(pyrite-free)变性和耐候性的六亚甲基二异氰酸酯三聚体(HDI三聚体)以及六亚甲基二异氰酸酯脲基甲酸酯三聚体(HDI脲基甲酸酯三聚体,优选地,具有4~4.5的NCO官能团)的混合物。优选地,HDI三聚体与HDI脲基甲酸酯三聚体的重量比为约1:1~3以提高固化速率。
根据优选的实施方式,基于涂料组合物的总重,在涂料组合物中以约20~30重量%、更优选约28%的量包括上述固化剂。如果以小于20重量%的量包括固化剂,则不发生涂料组合物的硬化,且难以保证膜的物理特性。另一方面,如果以大于30重量%的量包括固化剂,则涂料组合物的适用期缩短,且难以用涂料组合物工作。
(4)光稳定剂
光稳定剂防止可由长期暴露于光导致的涂料膜的老化和/或变色,且在紫外线阻挡、光能的吸收和转换、自由基的清除功能等中起作用。可适当地使用提供这种特性的任何常规的光稳定剂。根据优选的实施方式,光稳定剂优选地为混合有UV吸收剂和UV受阻胺光稳定剂的光稳定剂。所使用的UV受阻胺光稳定剂的种类优选地为具有UV吸收剂和位阻效应的有机胺类化合物。
可适当地使用任何常规的UV吸收剂类光稳定剂和胺光稳定剂。根据优选的实施方式,UV吸收剂类光稳定剂选自苯甲酮类、草酰替苯胺(oxaanilide)类、苯并三唑类或三嗪类等,且胺光稳定剂选自4-苯甲酰氧基-2,2,6,6-四甲基哌啶(tetramethylbipheridine)或2,4-二-叔丁基苯基-3,5-二-叔丁基-羟基苯甲酸。
更优选地,使用Tinuvin400和Tinuvin292的2~3:1的混合物。
优选的是基于涂料组合物的总重以约0.5~2wt%的量包括上述光稳定剂。当光稳定剂的量小于0.5重量%时,存在如下问题,即膜随时间容易变黄且光泽度随时间下降。另一方面,当光稳定剂的量大于2重量%时,涂料不足变得不稳定。
(5)反应催化剂
通常,由塑料材料构成汽车内部材料,且由于有可能塑料材料的变形在涂覆之后干燥时发生,所以执行低温固化(在低于80℃)以防止这样的变形。而且,通常执行两阶段式的丙烯酸聚氨酯反应,且干燥时间花费约30分钟以提高生产率。
上述的反应催化剂在提高树脂中包含的羟基(-OH基)与固化剂中包含的异氰酸酯基(-NCO基)的反应速率中起作用,以在上述条件下充分地交联聚氨酯。可使用适用于这样的作用的任何常规催化剂,且例如催化剂可包括二月桂酸二丁基锡等。
在这种情况下,基于涂料组合物的总重,优选在涂料组合物中以约0.2~0.5%的量包括上述反应催化剂。当反应催化剂的量包括少于0.2重量%时,不能较大程度期望反应速率的提高,且当其包括大于0.5重量%时,涂层的外观品质可降低。
(6)反应延缓剂
由于自恢复涂料中使用的支链聚酯树脂具有高含量的羟基和与丙烯基树脂相比相对较低的反应速率,所以需要过量的反应催化剂(约0.2~0.5重量%)来提高反应速率。然而,这导致涂料组合物的适用期缩短,因此可加工性可能降低。
因此,在本发明中优选加入约0.99~9.0重量%的反应延缓剂以防止过度反应。可适当地使用任何已知的反应延缓剂,且根据优选的实施方式,使用二酮化合物作为反应延缓剂。
二酮化合物是指在一个分子中具有两个酮羰基的化合物,且根据两个酮基的相对位置,将其不同地分为1,2-(或α-)、1,3-(或β-)和1,4-二酮等,且包括丁二酮、己二酮等。优选地,本发明使用2,4-戊二酮等作为上述二酮化合物。
根据优选的实施方式,相比于涂料组合物的总重,优选以约0.99~9.0%的量包括反应延缓剂。如果反应延缓剂的量小于0.99重量%,则难以保证本发明中所需的适用期,且如果大于9.0重量%,则反应大大延迟,因此可加工性可能降低。
2.用途
提供根据本发明的涂料组合物,其适用于各种应用且优选用于涂覆汽车内部部件。
根据本发明的实施方式,当使用本发明的涂料组合物时,可增加涂料的适用期。
以下,将通过实施例的方式详细说明本发明。对本领域普通技术人员明显的是,这些实施例仅用于示例本发明,且本发明的范围不被理解为受这些实施例限制。
[实施例]
在下表1中示出实施例和比较例的样品的构成组分和含量,且在下表2和3中分别总结物理特性和适用期。
[表1]
1)固化剂-1:HDI三聚体(商品名:Desmodur N3300)
2)固化剂-2:HDI脲基甲酸酯三聚体(商品名:Desmodur XP-2679)
3)光稳定剂:UVA(Tinuvin400)和HALS(Tinuvin292)以2:1的比例混合
4)反应催化剂:二月桂酸二丁基锡
5)反应延缓剂:2,4-戊二酮
6)溶剂:乙酸丁酯
上述表1示出根据本发明的实施例和比较例的构成组分和含量的比较。
如上表中所示,实施例1使用支链聚酯树脂和丙烯基多元醇树脂作为根据本发明的组合物的一个实例。该组合物包括多官能固化剂,并与2,4-戊二酮一起使用二月桂酸二丁基锡。
上述比较例1表示类似于实施例1的组合物,但使用聚酯多元醇代替支链聚酯树脂。
上述比较例2和比较例3表示类似于实施例1的组合物,但单独使用一种固化剂。
上述比较例4表示类似于实施例1的组合物,但未使用2,4-戊二酮。
上述比较例5表示类似于实施例1的组合物,但未使用反应催化剂,而比较例6表示类似于实施例1的组合物,但未使用反应催化剂或2,4-戊二酮。
上述比较例7和比较例8表示类似于实施例1的组合物,但分别使用较小或较大量的反应催化剂。
用于识别物理特性的涂料膜的干燥条件在80℃下进行30分钟,这通常是用于涂覆塑料材料的干燥条件。然后在表2中确定和总结各个涂料组合物的物理特性,且还在表3中确定和总结涂料组合物的适用期的结果。
[表2]
※评价标准:优异[◎],良好[○],普通[△],差[X]
在ASTM D412标准下进行实验,且首先制备Dumbell型样品,在ISO527-35型的样品上标记20.0mm度量(Gauge)(L0),然后在100%扩展态下放置10分钟,然后从夹具(grip)移开,并置于平地。然后,再次确定度量间的距离(L1),并且识别恢复时间且计算弹性恢复率。计算公式如下:
弹性恢复率
[表3]
适用期(活化期稳定性)通常指打开涂料的原始包装之后或混合组分(例如,多于两种包装型涂料组分)以使用涂料后保持涂料适于使用的流动性而无凝胶化、硬化等的时间。
通过在混合上述表1中的组成后使用容器杯(pod cup)#4,然后置于室温(25℃)下,来将本发明中的适用期确定为随时间的粘度变化,并且在上述表3中阐明结果。
如上述表2和3中所示,实施例1获得所有物理特性都优异的结果,且由于在混合固化剂后粘度随时间变化不大,所以确定可加工性得到保证。
上述比较例1使用聚酯多元醇代替支链聚酯树脂,因此弹性恢复时间相当长且物理特性例如耐防晒性等降低。
上述比较例2单独使用固化剂-1且物理特性良好,但是弹性恢复率和耐刮擦性有所降低。
上述比较例3单独使用固化剂-2且获得优异的弹性恢复率和耐刮擦性,但是耐防晒性有所降低。
上述比较例4示出约等同于实施例1的弹性恢复率、耐刮擦性和膜物理特性,但是在确定适用期时,涂料的粘度在0.5小时过去后迅速增加。
将上述比较例5和比较例6在80℃下干燥30min但不形成膜,以至足以研究物理特性的水平(即不充分地固化)。因此,证实了需要使用催化剂。
上述比较例7使用的反应催化剂的量小于实施例1中的量。如所示,由于未发生充足的聚氨酯反应,所以证实了弹性恢复时间有所延长,且总的来说物理特性降低。
上述比较例8使用与实施例1中的量相比过量的反应催化剂,且涂料膜的物理特性约等同于实施例1中的物理特性。然而,确定的是粘度在3小时的适用期后迅速增加。这证实了尽管与反应催化剂一起使用2,4-戊二酮,但如果催化剂的含量多于0.7重量%,控制适用期变得困难。
如上面提到的,当使用支链聚酯树脂、作为多官能固化剂的固化剂-1和固化剂-2的混合物时,一般可获得具有优异物理特性的涂料组合物。而且,当一定量的反应催化剂与反应延缓剂2,4-戊二酮一起使用时,在室温下保持稳定的粘度,因此可以控制适用期。而且,固化速率在预定的干燥条件下增加,因此物理特性大大提高。
图1是应用本发明的涂料组合物的样品的表面照片,其中刮擦是人工制造的;而图2是24小时过去后该样品的表面照片。
如图所示,证实的是在应用本发明的涂料组合物的样品(100)上人工形成的刮擦(200)在24小时后消除。基于此,证实了本发明的涂料组合物的优异的刮擦自恢复性能。
如上,尽管将结合示例性实施方式描述本发明,但应当理解,本说明书无意于将本发明局限于这些示例性实施方式。相反,本发明不仅要涵盖这些示例性实施方式,还要涵盖由所附权利要求所限定的本发明的精神和范围内的各种替代形式、修改、等效形式和其它实施方式。
Claims (8)
1.一种具有延长适用期的快干刮擦自恢复涂料组合物,其包括:
30~40重量%的支链聚酯树脂;
30~40重量%的丙烯基多元醇树脂;
0.2~0.5重量%的反应催化剂;和
0.99~9.0重量%的反应延缓剂,其中重量%基于所述涂料组合物的总重。
2.如权利要求1所述的刮擦自恢复涂料组合物,其中所述反应催化剂是二月桂酸二丁基锡。
3.如权利要求1所述的刮擦自恢复涂料组合物,其中所述反应延缓剂是二酮化合物。
4.如权利要求3所述的刮擦自恢复涂料组合物,其中所述二酮化合物是2,4-戊二酮。
5.如权利要求1所述的刮擦自恢复涂料组合物,其中所述涂料组合物基于所述涂料组合物的总重还包括20~30重量%的固化剂。
6.如权利要求5所述的刮擦自恢复涂料组合物,其中所述固化剂包括以1:1~3的重量比混合的六亚甲基二异氰酸酯三聚体和六亚甲基二异氰酸酯脲基甲酸酯三聚体的混合物。
7.如权利要求5所述的刮擦自恢复涂料组合物,其中所述涂料组合物基于所述涂料组合物的总重还包括0.5~2重量%的光稳定剂。
8.如权利要求7所述的刮擦自恢复涂料组合物,其中所述光稳定剂包括以2~3:1的重量比混合在一起的Tinuvin 400和Tinuvin 292。
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