CN106366847A - 一种户外超耐候、高防腐涂料 - Google Patents
一种户外超耐候、高防腐涂料 Download PDFInfo
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Abstract
本发明提供一种用于户外设备的超耐候、高防腐的粉末涂料及其制备方法,利用粉末涂料二涂二烤,或是二涂一烤的方法,第一涂为超防锈成分的环氧底漆,第二涂为超耐UV的装饰性粉末涂料,可达到具有超耐候、高防腐的涂料性能而且兼具良好的装饰性,可大大延长使用年限。底漆以现有环氧粉末为基础,进行防腐能力的再加强,着眼于阴极保护用的金属,例如锌粉。面漆配方的改进以提升耐UV性能为主,如交联体系中树脂的选取及色料与各项配方成分的严格筛选。涂装方式为二涂二烤或二涂一烤,使底漆和面漆结合。
Description
技术领域
本发明属于化学材料领域,具体涉及一种用于户外设备的超耐候、高防腐的粉末涂料及其制备方法。
背景技术
目前国内外涂料中,以热固性粉末涂料为最先进最环保的涂料,主要是因为这种涂料为完全的固体粉末,不含任何的可挥发性溶液也不含水分,而且在各项理化性能的表现方面也远较其他涂料更为优异。由于粉末涂料的热固性,加热烘烤后,即进行三维的立体网状交联,形成优异完整的涂膜。
然而粉末涂料还是存在部分技术上难以克服的攻关点。譬如同时要求“超”耐候及“高”防腐的涂料,就是一个待开发的一个重要的应用领域。国内的经济飞速的成长,政府的工程、企业的建筑、以至人民的住宅,对建材要求也会提高,对于高品质的防腐耐候涂料也会逐步增加需求。目前的防腐方面的有主要有二种方法。第一种为先在涂装底材形成不可溶的无机防腐皮膜,再涂装装饰性涂膜。这是行业内最通用的方法,但这个方法对皮膜的品质要求极高,要求超防腐性能的涂装,特别是铁类底材,这样的方法不足以达到超防腐的目的与要求。第二种方法为底材喷砂处理后,涂以含超防锈成分的环氧涂料。虽然这种方法可以达到高防腐的目的与要求,但它的耐候性与装饰性有一定的缺陷。
发明内容
本发明的目的是提供一种用于户外建材的超耐候、高防腐的涂料,以解决特定的使用环境(如沿海高盐分或工业区等区域等环境)或高要求的规范(地标建筑或高档建筑等涂装)。利用粉末涂料二涂二烤,或是二涂一烤的方法,第一涂为超防锈成分的环氧底漆,第二涂为超耐UV的装饰性粉末涂料,可达到具有超耐候、高防腐的涂料性能而且兼具良好的装饰性,可大大延长使用年限。
本发明通过以下手段实现:①高防腐底漆的配方;②超耐候面漆的配方;③二涂二烤/二涂一烤的涂装方法。
底漆以现有环氧粉末为基础,进行防腐能力的再加强,着眼于阴极保护用的金属,例如锌粉。
面漆配方的改进以提升耐UV性能为主,如交联体系中树脂的选取及色料与各项配方成分的严格筛选。
涂装方式为二涂二烤或二涂一烤,使底漆和面漆结合。第一涂涂装底漆,主要提供底材防腐的保护,第二涂涂装面漆,用于隔绝UV对防腐底漆的破坏,同时提供优良的装饰性;涂装好两层漆之后进行加热固化,此为二涂一烤。也可以在涂装底漆之后先烘烤,然后再涂装面漆,再第二次加热烘烤,促进固化,此为二涂二烤。
底漆配方按重量份如下:
环氧树脂E-20 12-15份,二甲苯10-11份,苯1-2份,固化剂卡德莱NX-2016 3-4份,正丁醇5-6份,分散剂3104S 0.2-0.3份,氢化蓖麻油RSM 0.2-0.3份,消泡剂6052 0.1-0.2份,流平剂9358 0.4-0.5份,锌粉球状400目:非浮性铝粉=4:1-5:1 60-70份。
优选的配方为:
环氧树脂E-20 12份,二甲苯10份,苯1份,固化剂卡德莱NX-2016 3份,正丁醇5份,分散剂3104S0.3份,氢化蓖麻油RSM 0.3份,消泡剂6052 0.2份,流平剂9358 0.4份,锌粉球状400目:非浮性铝粉=4:170份。
面漆配方按重量份如下:
氟树脂701F 55-65份,固化剂BF1540 13-14份,流平剂TROY486 1-2份,脱气剂安息香0.5-1份,钛白粉706 15-25份,催化剂DBTDL 0.1-0.3份,消泡剂SA500 0.1-0.2份,硫酸钡250目3-4份,抗氧剂B2250.2-0.4份,UV吸收剂0.2-0.4份,光稳定剂0.2-0.4份。
优选的配方如下:
氟树脂701F 60份,固化剂BF1540 13.5份,流平剂TROY486 1.5份,脱气剂安息香0.8份,钛白粉706 20份,催化剂DBTDL 0.2份,消泡剂SA500 0.1份,硫酸钡250目3份,抗氧剂B225 0.3份,UV吸收剂0.3份,光稳定剂0.3份。
涂装方法如下:
喷粉时输入气压控制在0.5-1.5kg/cm2,静电电压控制在60-70kV。二涂一烤时固化温度180℃-250℃,固化时间为15-25分钟,二涂二烤时第一次加热140-160℃3-5分钟,第二次加热180℃-250℃,固化时间为15-25分钟。
本发明提供的涂料的优点如下:
具有超高耐候性、防腐蚀性能及装饰性耐,可同时达到并部分重要指标超越HG/T2006-2006热固性粉末涂料及SY/T035-2005中华人民共和国石油天然行业标准钢质管道单层熔结环氧粉末-外涂层技术规范。在装饰耐候性能可同时达到下列两项规范的要求:GB/T 5237.4-2004铝合金建筑型材第四部分:粉末喷涂型材及AAMA 2603—2002铝型材和铝板上着色有机涂膜的技术规范及性能或AAMA 2604-2002就挤塑铝型材和板材表面超耐候性有机涂层的技术指标和性能要求。
本发明提供的涂料主要用于盐分高的沿海建筑(如住宅,桥梁等)及高规范高档要求的地标项目,(如地标建筑,机场,地铁,高速公路护栏,运动会馆,展览馆,户外防风墙等),可大幅的延长涂装工件的实际使用年限达十年以上。可提升国内涂料品质达到世界一流水准,使越来越多的指标性建筑,能选用国内生产的涂料来作涂装。进一步可以出口,创造外汇。
具体实施方式
实施例1
采用本发明提供的底漆配方对工件进行涂装后测试防腐蚀新能。配方如下:环氧树脂E-20 12份,二甲苯10份,苯1份,固化剂卡德莱NX-2016 3份,正丁醇5份,分散剂3104S0.3份,氢化蓖麻油RSM 0.3份,消泡剂6052 0.2份,流平剂9358 0.4份,锌粉球状400目:非浮性铝粉=4:1 70份。
喷砂处理后再涂装的工件,中性盐雾测试可达以下性能:
非不破坏性:3000小时,无明显变化。
破坏性:2500小时,腐蚀小于3mm。
实施例2
采用本发明提供的面漆配方,对工件进行涂装后测试耐候、防腐蚀性能。配方如下:氟树脂701F 55-65份,固化剂BF1540 13-14份,流平剂TROY486 1-2份,脱气剂安息香0.5-1份,钛白粉706 15-25份,催化剂DBTDL 0.1-0.3份,消泡剂SA500 0.1-0.2份,硫酸钡250目3-4份,抗氧剂B225 0.2-0.4份,UV吸收剂0.2-0.4份,光稳定剂0.2-0.4份。
(1)中性盐雾测试可达以下性能:
非不破坏性:3000小时,无明显变化。
破坏性:2500小时,腐蚀小于3mm。
(2)南佛罗里达曝晒1年(AAMA 2603-2002)至5年(AMMA 2604-2002)。
佛罗里达曝晒测试 | 保光率 | 色差 | |
AAMA2603 | 1年 | ﹥50% | △E﹤5 |
AAMA2604 | 5年 | ﹥30% | △E﹤5 |
符合上述要求说明涂膜的使用生命周期至少可达十年以上,甚至可达十五年或二十年。
实施例3
底漆中对于锌粉的筛选试验。选用不同的锌基组成制备底漆,进行防腐试验,试验选用GB/T 1733-1993漆膜耐水性试验、GB/T 9274-1988漆膜耐盐水性试验、GB/T 1771-1991漆膜耐盐雾性。结果如下表:
根据以上三项试验结果,最后选择锌基组成为球状锌粉:非浮铝型4:1的配方。
实施例4
采用本发明提供的方法涂装工件制得产品A,具体方法如下:
底漆:环氧树脂E-20 12份,二甲苯10份,苯1份,固化剂卡德莱NX-2016 3份,正丁醇5份,分散剂3104S 0.2份,氢化蓖麻油RSM 0.2份,消泡剂6052 0.1份,流平剂9358 0.4份,锌粉球状400目:非浮性铝粉=4:1 60份。
面漆:
氟树脂701F 55份,固化剂BF1540 13份,流平剂TROY486 1份,脱气剂安息香0.5份,钛白粉706 15份,催化剂DBTDL 0.1份,消泡剂SA500 0.1份,硫酸钡250目3份,抗氧剂B225 0.2份,UV吸收剂0.2份,光稳定剂0.2份。
涂装方法:
喷粉时输入气压控制在0.5-1.5kg/cm2,静电电压控制在60-70kV。二涂一烤时固化温度180℃-250℃,固化时间为15-25分钟,二涂二烤时第一次加热140-160℃3-5分钟,第二次加热180℃-250℃,固化时间为15-25分钟。
实施例5
采用本发明提供的方法涂装工件制得产品B,具体方法如下:
底漆:环氧树脂E-20 15份,二甲苯11份,苯2份,固化剂卡德莱NX-2016 4份,正丁醇6份,分散剂3104S 0.3份,氢化蓖麻油RSM 0.3份,消泡剂6052 0.2份,流平剂9358 0.5份,锌粉球状400目:非浮性铝粉=5:1 70份。
面漆:
氟树脂701F 65份,固化剂BF1540 14份,流平剂TROY486 2份,脱气剂安息香1份,钛白粉706 25份,催化剂DBTDL 0.3份,消泡剂SA500 0.2份,硫酸钡250目4份,抗氧剂B2250.4份,UV吸收剂0.4份,光稳定剂0.4份。
涂装方法:
喷粉时输入气压控制在0.5-1.5kg/cm2,静电电压控制在60-70kV。二涂一烤时固化温度180℃-250℃,固化时间为15-25分钟,二涂二烤时第一次加热140-160℃3-5分钟,第二次加热180℃-250℃,固化时间为15-25分钟。
实施例6
对产品A、B按照AAMA2605进行检测,结果见下表:
Claims (9)
1.一种户外超耐候、高防腐涂料的制备方法,其特征为,该方法由以下三部分构成:①高防腐底漆的配方;②超耐候面漆的配方;③二涂二烤/二涂一烤的涂装方法。
2.如权利要求1所述的方法,其特征为,底漆配方按重量份组成如下:环氧树脂12-15份,二甲苯10-11份,苯1-2份,固化剂3-4份,正丁醇5-6份,分散剂0.2-0.3份,氢化蓖麻油0.2-0.3份,消泡剂0.1-0.2份,流平剂0.4-0.5份,锌粉60-70份。
3.如权利要求2所述的方法,其特征为,底漆配方中选用的品牌/型号如下:环氧树脂为E-20,固化剂为卡德莱NX-2016,分散剂为3104S,氢化蓖麻油为RSM,消泡剂为6052,流平剂为9358,锌粉为球状400目:非浮性铝粉=4:1-5:1。
4.如权利要求2所述的方法,其特征为,优选的底漆配方按重量份组成如下:环氧树脂E-20 12份,二甲苯10份,苯1份,固化剂卡德莱NX-2016 3份,正丁醇5份,分散剂3104S 0.3份,氢化蓖麻油RSM 0.3份,消泡剂6052 0.2份,流平剂9358 0.4份,锌粉球状400目:非浮性铝粉=4:1 70份。
5.如权利要求1所述的方法,其特征为,面漆配方按重量份组成如下:氟树脂55-65份,固化剂13-14份,流平剂1-2份,脱气剂0.5-1份,钛白粉15-25份,催化剂0.1-0.3份,消泡剂0.1-0.2份,硫酸钡3-4份,抗氧剂0.2-0.4份,UV吸收剂0.2-0.4份,光稳定剂0.2-0.4份。
6.如权利要求5所述的方法,其特征为,面漆配方中选用的品牌/型号如下:氟树脂选用701F,固化剂选用BF1540,流平剂选用TROY486,脱气剂选用安息香,钛白粉选用706,催化剂选用DBTDL,消泡剂选用SA500,硫酸钡选用250目,抗氧剂选用B225。
7.如权利要求5所述的方法,其特征为,优选的面漆配方按重量份组成如下:氟树脂701F 60份,固化剂BF1540 13.5份,流平剂TROY486 1.5份,脱气剂安息香0.8份,钛白粉70620份,催化剂DBTDL 0.2份,消泡剂SA500 0.1份,硫酸钡250目3份,抗氧剂B225 0.3份,UV吸收剂0.3份,光稳定剂0.3份。
8.如权利要求1所述的方法,其特征为,涂装方法如下:涂装方式为二涂二烤或二涂一烤,使底漆和面漆结合;第一涂涂装底漆,主要提供底材防腐的保护,第二涂涂装面漆,用于隔绝UV对防腐底漆的破坏,同时提供优良的装饰性;涂装好两层漆之后进行加热固化,此为二涂一烤;也可以在涂装底漆之后先烘烤,然后再涂装面漆,再第二次加热烘烤,促进固化,此为二涂二烤。
9.如权利要求8所述的方法,其特征为,涂装方法具体参数如下:喷粉时输入气压控制在0.5-1.5kg/cm2,静电电压控制在60-70kV;二涂一烤时固化温度180℃-250℃,固化时间为15-25分钟,二涂二烤时第一次加热140-160℃3-5分钟,第二次加热180℃-250℃,固化时间为15-25分钟。
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