CN107847622A - 具有改进的耐黄变性的抗微生物涂料组合物 - Google Patents
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Abstract
本发明提供一种抗微生物涂料组合物,包含(i)(共)聚合物粒子的粘合剂分散液和(ii)按所述涂料组合物的总干重以干重计50ppm到2000ppm银;其中按所述粘合剂分散液的总干重以干重计,所述粘合剂分散液包含(a)40%到99.9%烯系不饱和非离子单体和(b)0.1%到60%含有磷酸基的(甲基)丙烯酸酯单体作为聚合单元。
Description
技术领域
本发明涉及一种具有改进的耐黄变性的抗微生物涂料组合物。
背景技术
银离子或银元素在用于涂料调配物中时提供具有极好的抗微生物性能的涂料调配物。涂料中的银含量越高,抗微生物性能越好。然而,当涂料中的银含量为高于100ppm的浓度时,涂料在暴露于日光时可能变黄。
因此涂料行业中需要具有高银含量和更好的耐黄变性能的抗微生物涂料组合物。
发明内容
本发明提供一种抗微生物涂料组合物,包含(i)(共)聚合物粒子的粘合剂分散液和(ii)按所述涂料组合物的总干重以干重计50ppm到2000ppm银;其中按所述粘合剂分散液的总干重以干重计,所述粘合剂分散液包含(a)40%到99.9%烯系不饱和非离子单体和(b)0.1%到60%含有磷酸基的(甲基)丙烯酸酯单体作为聚合单元。
具体实施方式
本发明提供一种抗微生物涂料组合物,包含(i)(共)聚合物粒子的粘合剂分散液和(ii)按所述涂料组合物的总干重以干重计50ppm到2000ppm,优选地100ppm到1000ppm,并且更优选地200ppm到700ppm银。
(共)聚合物粒子的粘合剂分散液
按所述粘合剂分散液的总干重以干重计,粘合剂分散液包含(a)40%到99.9%,优选地60%到99.7%,并且更优选地75%到99.5%烯系不饱和非离子单体;和(b)0.1%到60%,优选地0.3%到40%,并且更优选地0.5%到25%含有磷酸基的(甲基)丙烯酸酯单体作为聚合单元。
含有磷酸基的(甲基)丙烯酸酯单体中的磷酸基比银的摩尔比是0.1到70,优选地0.3到50,并且更优选地0.5到35。
(共)聚合物粒子具有400到500,000道尔顿,优选地500到300,000道尔顿,更优选地1,000到100,000道尔顿,甚至更优选地1,500到70,000道尔顿,并且最优选地2,000到50,000道尔顿的重量平均分子量。
如本文所使用,术语“非离子单体”指的是在pH=1-14之间不带有离子电荷的单体。烯系不饱和非离子单体的适合实例包括(甲基)丙烯酸的烷基酯,如丙烯酸甲酯、丙烯酸乙酯、丙烯酸丁酯、丙烯酸2-乙基己酯、丙烯酸癸酯、丙烯酸十二烷酯、甲基丙烯酸甲酯、甲基丙烯酸丁酯、甲基丙烯酸异癸酯、甲基丙烯酸十二烷酯、甲基丙烯酸羟乙酯、甲基丙烯酸羟丙酯和其任何组合;(甲基)丙烯腈;(甲基)丙烯酰胺;氨基官能单体和脲基官能单体,如甲基丙烯酸羟乙基亚乙基脲酯;带有乙酰乙酸酯官能团的单体,如甲基丙烯酸乙酰乙酰氧基乙酯(AAEM);带有含羰基基团的单体,如二丙酮丙烯酰胺(DAAM);具有苯环(如苯乙烯和经取代的苯乙烯)的烯系不饱和单体;丁二烯;α-烯烃,如乙烯、丙烯和1-癸烯;乙酸乙烯酯、丁酸乙烯酯、叔碳酸乙烯酯和其它乙烯酯;乙烯基单体,如氯乙烯和偏二氯乙烯;(甲基)丙烯酸缩水甘油酯;以及其任何组合。
在一个优选实施例中,烯系不饱和非离子单体选自苯乙烯、(甲基)丙烯酸的C2-C12烷基酯、其衍生物以及其任何组合。
含有磷酸基的(甲基)丙烯酸酯单体的适合实例包括(甲基)丙烯酸磷酸烷基酯,如(甲基)丙烯酸磷酸乙酯、(甲基)丙烯酸磷酸丙酯、(甲基)丙烯酸磷酸丁酯,其盐以及其任何组合;(甲基)丙烯酸磷酸烷氧基酯,如磷酸基(乙二醇)(甲基)丙烯酸酯、磷酸基(二-乙二醇)(甲基)丙烯酸酯、磷酸基(三-乙二醇)(甲基)丙烯酸酯、磷酸基(丙二醇)(甲基)丙烯酸酯、磷酸基(二-丙二醇)(甲基)丙烯酸酯、磷酸基(三-丙二醇)(甲基)丙烯酸酯、其盐以及其任何组合。含有磷酸基的(甲基)丙烯酸酯单体优选地选自(甲基)丙烯酸磷酸烷基酯的单酯或二酯,更优选地为甲基丙烯酸磷酸乙酯的单酯或二酯,并且最优选地为甲基丙烯酸磷酸乙酯(PEM)。
任选地,按粘合剂分散液的总干重以干重计,粘合剂分散液另外包含(c)0.01%到30%,优选地0.1%到20%,并且更优选地0.3%到10%稳定剂单体作为聚合单元。
稳定剂单体的适合实例包括苯乙烯磺酸钠(SSS)、乙烯基磺酸钠(SVS)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、丙烯酰胺(AM)、丙烯酸(AA)、甲基丙烯酸(MAA)、衣康酸(IA)以及其任何组合。
聚合物粒子的聚合可以是所属领域中已知的任何方法,包括乳液聚合、微乳液聚合以及机械分散技术。
银
在本发明中,银以银元素(即Ag0)形式或以氧化态银离子(即Ag1+)形式并入涂料组合物中,并且以银溶液形式提供。银溶液的适合实例包括去离子(“DI”)水中的硝酸银、乙酸银、柠檬酸银、碘化银、乳酸银、苦味酸银、硫酸银以及其任何组合。银溶液的优选实例是硝酸银和碘化银。除去离子水以外,还可以使用其它液体介质,如水、水性缓冲溶液和有机溶液,如聚醚或醇。此等溶液中的银浓度可以不同于向抗微生物涂料组合物中添加已知量的银达到饱和银溶液所需的浓度,即如本发明中按所述涂料组合物的总干重以干重计,50ppm到2000ppm,优选地100ppm到1000ppm,并且更优选地200ppm到700ppm。可商购的银溶液包括来自陶氏化学公司(The Dow Chemical Company)的SILVADURTM 900、SILVADUR 930、SILVADUR 961和SILVADUR ET以及来自巴斯夫公司(BASF Company)的IRGAGUARDTM B 5000、IRGAGUARD B 5120、IRGAGUARD B 6000、IRGAGUARD D 1071和IRGAGUARD H 6000。
抗微生物涂料组合物
涂料组合物可以进一步包含其它颜料或增量剂。
如本文所用,术语“颜料”指的是能够实质上有助于涂料的不透明度或隐藏能力的颗粒状无机材料。颜料的折射率通常等于或大于1.8,并且包括氧化锌、硫化锌、硫酸钡和碳酸钡。为清楚起见,本发明的二氧化钛粒子不包括在本发明的“颜料”中。
术语“增量剂”指的是折射率小于或等于1.8并且大于1.3的颗粒状无机材料,并且包括碳酸钙、氧化铝(Al2O3)、粘土、硫酸钙、铝硅酸盐、硅酸盐、沸石、云母、硅藻土、实心或空心玻璃、以及瓷珠。涂料组合物可以任选地含有玻璃态转变温度(Tg)大于60℃的实心或中空聚合粒子,本文中出于颜料体积浓度(pigment volume concentration,PVC)计算的目的,这种聚合粒子归类为增量剂。实心聚合粒子的粒子尺寸为1到50微米,并且优选地为5到20微米。聚合粒子的适合实例是可商购自陶氏化学公司的ROPAQUETMUltra E不透明聚合物。为清楚起见,本发明的聚合粒子与本发明的第一或第二聚合物不同。碳酸钙、粘土、云母和氧化铝(Al2O3)是优选的增量剂。
涂料组合物的PVC(颜料体积浓度)如下计算:
PVC(%)=[颜料体积+增量剂体积]/涂料的总干燥体积。
在一个优选实施例中,涂料组合物的PVC为10%到75%,并且优选地20%到70%。
涂料组合物的制备
涂料组合物的制备涉及以下方法:选择并且以恰当比例混合适当涂料成分以提供具有特定加工和处理特性的涂料以及具有所需特性的最终干燥涂料膜。
涂料组合物的涂覆
涂料组合物可以通过常规涂覆方法涂覆,如涂刷、辊涂和喷雾方法,如空气雾化喷雾、空气辅助喷雾、无空气喷雾、高体积低压喷雾和空气辅助无空气喷雾。
用于涂料涂覆的适合衬底包括混凝土、水泥板、中等密度纤维板(MDF)和粒子板、石膏板、木材、石材、金属、塑料、墙纸以及纺织品等。优选地,所有衬底都由水性底漆或溶剂型底漆预涂。
实例
I.原材料
缩写 | 化学试剂 |
BA | 丙烯酸丁酯 |
MMA | 甲基丙烯酸甲酯 |
(M)AA | (甲基)丙烯酸 |
AA | 丙烯酸 |
SBS | 硫酸氢钠 |
EDTA | 乙二胺四乙酸 |
t-BHP | 叔丁基过氧化氢 |
MMP | 3-甲基巯基丙醛 |
BMA | 甲基丙烯酸丁酯 |
MAA | 甲基丙烯酸 |
PEM | 甲基丙烯酸磷酸乙酯 |
IAA | 异抗坏血酸 |
II.测试工序
1.耐黄变性测定
使用200μm Bird涂膜器在涂覆有底涂剂的水泥板上进行涂料压延,接着在CTR室中干燥1天。将经过干燥的涂料膜放置在玻璃窗边进行日晒。在两周内通过BYK-Gardner色标卡球形分光光度计测量膜的B值。B值的变化越小,耐黄变性能越好。并且B值变化降低超过0.3将被视为显著改善。
III.实验实例
1.制备粘合剂分散液1
通过混合386g去离子水、33.33g(31%有效)DISPONILTMFES 993表面活性剂、650gBMA、150g MAA、206.4g PEM以及25.5g MMP制备。
反应器是装配有桨式搅拌器、温度计、氮气入口以及回流冷凝器的5升四颈圆底烧瓶。向烧瓶添加706g去离子水和33.33g(31%有效)DISPONILwMFES 993表面活性剂。在氮气气氛和搅拌下将烧瓶的内容物加热到85℃。随后添加43g单体乳液,随后快速添加8g过硫酸钠溶解于30g去离子水中的溶液和5g去离子水冲洗液。搅拌10分钟后,历经120分钟线性地添加单体乳液的剩余部分,随后为30g冲洗液。引发剂以及4.5g过硫酸钠和3.09g乙酸钠溶解于180g去离子水中的缓冲溶液与单体乳液馈入同时开始,并且历经125分钟时间段线性地添加。当完成所有添加时,用40g去离子水稀释烧瓶并且随后使其冷却到65℃。将三对催化剂/活化剂添加到烧瓶中,随后添加促进剂来减少残余单体。随后将烧瓶冷却到40℃,历经10分钟添加5.59g KATHONTMLX 1.5%于20g去离子水中的杀生物剂溶液。在聚合完成之后,将共聚物乳液冷却到环境温度并且经325目筛尺寸的筛网过滤。
2.制备粘合剂分散液2
粘合剂分散液2根据上述程序通过混合去离子水、128g DISPONIL FES 993表面活性剂(30%有效)、648.84g BA、754.89g MMA、11.47g PEM、2.86g MAA以及10.45g AA制备用于粘合剂分散液2的单体乳液来制备。
3.制备抗微生物涂料组合物
比较涂料1(比较1)和涂料1和2根据表1使用以下程序制备。使用高速考雷司(Cowles)分散器混合研磨成分。使用常规实验室混合器来添加稀释成分。
表1
比较涂料2(比较2)和涂料3和4用表1的相同程序制备,主要差异为如表2中所示的SILVADURTMET抗微生物负载水平。涂料4不包含上文制备的粘合剂分散液1和2中的任一个,但其包含六偏磷酸钠作为无机表面活性剂,其在涂料组合物中不可聚合。涂料4包含六偏磷酸钠使得涂料组合物中磷酸基比银的摩尔比是28.8。
IV.结果
表2
*按涂料组合物的总干重以干重计;以及
#六偏磷酸钠(无机磷酸基)添加到涂料组合物中作为表面活性剂并且不聚合到(共)聚合物粒子上。
表2中所示的结果指示包含含有磷酸基的(甲基)丙烯酸酯单体作为聚合单元的粘合剂组合物改进含有银的抗微生物涂料组合物的耐黄变性能。
在120ppm银剂量下,涂料1和涂料2相较于比较涂料1都显示降低的B值变化,并且指示显著改进的耐黄变性能。在1300ppm银剂量下,涂料3相较于比较涂料2显示降低的B值变化,并且指示显著改进的耐黄变性能。涂料4相较于涂料3包含高得多的磷酸基摩尔数(28.8相较于0.8),但其耐黄变性能相较于比较涂料2没有改进。仅当磷酸基在粘合剂分散液的(共)聚合物粒子上聚合时,磷酸基才起作用。
Claims (9)
1.一种抗微生物涂料组合物,包含(i)(共)聚合物粒子的粘合剂分散液和(ii)按所述涂料组合物的总干重以干重计50ppm到2000ppm银;其中按所述粘合剂分散液的总干重以干重计,所述粘合剂分散液包含(a)40%到99.9%烯系不饱和非离子单体和(b)0.1%到60%含有磷酸基的(甲基)丙烯酸酯单体作为聚合单元。
2.根据权利要求1所述的抗微生物涂料组合物,其中按所述涂料组合物的总干重以干重计,所述银含量是100ppm到1000ppm。
3.根据权利要求1所述的抗微生物涂料组合物,其中所述含有磷酸基的(甲基)丙烯酸酯单体中的所述磷酸基与所述银的摩尔比是0.1到70。
4.根据权利要求1所述的抗微生物涂料组合物,其中所述(共)聚合物粒子的分子量是400到500,000道尔顿。
5.根据权利要求1所述的抗微生物涂料组合物,其中所述烯系不饱和非离子单体选自苯乙烯、(甲基)丙烯酸的C2-C12烷基酯、其衍生物以及其任何组合。
6.根据权利要求1所述的抗微生物涂料组合物,其中所述含有磷酸基的(甲基)丙烯酸酯单体选自(甲基)丙烯酸磷酸烷基酯的单酯或二酯。
7.根据权利要求1所述的抗微生物涂料组合物,其中所述银以银元素或银溶液形式的氧化态银离子并入到所述涂料组合物中。
8.根据权利要求6所述的抗微生物涂料组合物,其中所述银溶液选自去离子水中之硝酸银、乙酸银、柠檬酸银、碘化银、乳酸银、苦味酸银、硫酸银以及其任何组合。
9.根据权利要求1所述的抗微生物涂料组合物,其中所述涂料组合物的颜料容积浓度为10%到75%。
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CN1344770A (zh) * | 2000-09-28 | 2002-04-17 | 罗姆和哈斯公司 | 用于直接接触金属的涂料的结合剂组合物 |
CN1252157C (zh) * | 2000-11-21 | 2006-04-19 | 罗姆和哈斯公司 | 聚合物-颜料复合材料 |
CN101010366A (zh) * | 2004-08-26 | 2007-08-01 | 诺誉有限公司 | 具有改善的稳定性的涂料组合物 |
CN102206393A (zh) * | 2010-03-31 | 2011-10-05 | 罗门哈斯公司 | 抗菌聚合物乳液和涂料组合物 |
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CN1676562A (zh) * | 2004-03-29 | 2005-10-05 | 真永实业有限公司 | 防霉抗菌的涂料及有防霉抗菌性能的纺织品及其制造方法 |
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CN1252157C (zh) * | 2000-11-21 | 2006-04-19 | 罗姆和哈斯公司 | 聚合物-颜料复合材料 |
CN101010366A (zh) * | 2004-08-26 | 2007-08-01 | 诺誉有限公司 | 具有改善的稳定性的涂料组合物 |
CN102206393A (zh) * | 2010-03-31 | 2011-10-05 | 罗门哈斯公司 | 抗菌聚合物乳液和涂料组合物 |
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