CN114605585B - 改性防静电丙烯酸酯树脂、透明耐磨防静电涂料及制备方法 - Google Patents
改性防静电丙烯酸酯树脂、透明耐磨防静电涂料及制备方法 Download PDFInfo
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- CN114605585B CN114605585B CN202011422168.3A CN202011422168A CN114605585B CN 114605585 B CN114605585 B CN 114605585B CN 202011422168 A CN202011422168 A CN 202011422168A CN 114605585 B CN114605585 B CN 114605585B
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Abstract
本发明公开了一种改性防静电丙烯酸酯,并以此为基础,公开了一种透明耐磨防静电水性涂料,改性防静电丙烯酸酯树脂乳液与消泡剂、增稠剂、偶联剂、纳米填料均匀共混后,制得具有透明耐磨防静电功能的涂料。其中,改性树脂乳液通过核壳乳液聚合得到。本发明制得的涂料为水性体系,安全环保,在透明性、附着力,硬度、耐磨性等方面均有优良表现,涂层电阻值达107‑108Ω·cm,在多种相关设备、电子元器件、膜或板材产品等方面具有重要的应用价值。本发明还公开了改性防静电丙烯酸酯树脂和透明耐磨防静电涂料的制备方法。
Description
技术领域
本发明属于功能涂料技术领域,涉及一种改性防静电丙烯酸酯树脂和一种透明耐磨防静电涂料,可应用于塑料、玻璃、金属、陶瓷等多种材料表面。本发明还涉及改性防静电丙烯酸酯树脂和透明耐磨防静电涂料的制备方法。
背景技术
材料表面的静电积蓄现象普遍存在,如家用电器、电子元件、传送带、塑料薄膜等的生产和应用中,常常深受其扰。静电的产生主要由于材料之间的相互摩擦,导致制品加工或使用过程中的灰尘吸附、电击甚至引起火灾及爆炸事故。因此,研究如何改进材料表面的电阻率以避免静电积蓄,是材料研究与开发的一大重要方向。
目前,消除静电的方法多种多样,如添加抗静电剂或导电填料,抗静电涂层,表面改性等。其中,抗静电涂层是较为简便的方法,能够快速赋予材料表面防静电特性。除了分散的导电填料通过宏观渗流效应和微观隧道效应,形成连续的导电通路实现防静电效果,从材料物质本身结构考虑是另一种行之有效的方法。导电高分子为共轭体系,长链大π键中,电子的活性较大,可与掺杂剂形成电荷转移络合物,实现电子运动。而离子型材料结构中,阳离子或阴离子均可通过大分子链的孔隙进行空位迁移或跃迁扩散,以形成电流实现防静电效果。同时,涂层表面一定的亲水性有助于增加导电性,而平滑性则降低了摩擦系数,减小了静电发生的可能。另外,对于一般的导电填料,如石墨、炭黑及金属氧化物,见效快,适用广,但容易因摩擦、洗涤而脱失,往往出现迁移、耐蚀性差、颜色深等问题。因而,化学结合与物理共混复合的抗静电功能涂层具有重要的实用价值。
近年来随着环保意识的增强,人们越来越关注材料的环保问题。与之对应地,相关的环保法规也日趋严格。因此,功能涂料开发已转向低毒/无毒、环境友好型基料和溶剂是大势所趋。具备透明、耐磨、防静电等多重功能的水性涂料的开发,正是符合当前的发展需要,具备研究与开发价值。
中国专利CN103173108A公开了一种水性耐洗涤防静电涂料,其原料来源广泛,制备简单方便;防静电功能通过导电填料PEDOT/PSS实现。这一发明在耐磨性能和稳定性方面未有研究。中国专利101633809A公开了一种水溶性导电聚苯胺防静电阻尼涂料,其环保性好,施工方便,具有阻尼减震和防静电功能,而其透明和耐磨性能未有体现。中国专利CN107964326A公开了一种防静电漆及环保防静电地坪,具有防静电、表面硬度高、使用寿命长的特点,其导电剂为炭黑或/和导电碳纳米管,在颜色透明性、耐磨性等方面未深入研究。
发明内容
针对现有方法和技术的上述不足,根据本发明的实施例,希望提供一种改性防静电丙烯酸酯,并以此为基础,提出一种透明耐磨防静电涂料,该涂料用于塑料、玻璃金属等材料表面,在透明性、耐磨性,尤其在抗静电性方面有着突出性能。此外,本发明还希望提出前述改性防静电丙烯酸酯和透明耐磨防静电涂料的制备方法。
根据实施例,本发明提供的一种改性防静电丙烯酸酯树脂,其结构式可表示为式1所示:
式1中,R1为C2-C4的碳链;R2为-H或-CH3;R3为-OCH2CH2OH、-NHCH3OH或-NH2;R4为
a为5-20的整数,b为10-50的整数,c为5-30的整数,d为5-30的整数,e为5-30的整数。
根据实施例,本发明提供的改性防静电丙烯酸树脂的制备方法,其特征在于,包括如下步骤:
(1)纳米硅溶胶的制备:根据重量份,将2-10份纳米二氧化硅均匀分散到10-50份水中,加入0.2-0.5份分子量为200-750的聚乙二醇,搅拌并超声10-30min,制得纳米硅溶胶;
(2)核预聚体的制备:根据重量份,将0.3-0.8份过硫酸钠、1-3份十二烷基硫酸钠和1-3份壬基酚聚氧乙烯醚,溶于40-80份水中,将该溶液与步骤(1)中制得的纳米硅溶胶均匀混合;在45-60℃下,通入氮气,1000-1500r/min高速搅拌,匀速滴加由1-8份苯乙烯、3-15份甲基丙烯酸甲酯和3-15份丙烯酸烷基酯组成的混合核单体,剪切乳化,预聚5-20min,制得核预聚体;
(3)壳预聚体的制备:根据重量份,将0.3-0.8份过硫酸钠、1-3份十二烷基硫酸钠、1-3份壬基酚聚氧乙烯醚和0.5-1份碳酸氢钠溶于40-100份水中;在45-60℃下,通入氮气,1000-1500r/min高速搅拌,匀速滴加由2-15份丙烯酰胺类单体和2-15份羟基丙烯酸酯单体或N-羟甲基丙烯酸酰胺组成的混合壳单体,剪切乳化预聚5-30min,制得壳预聚体;
(4)乳液聚合:控制温度50-80℃,通入氮气,将壳预聚体在1-2h内滴入核预聚体中,反应1-3h,乳液自然冷却至室温,氨水调节pH为7-7.5,200目筛过滤,制得改性防静电丙烯酸树脂乳液。
优选地,本发明前述改性防静电丙烯酸树脂乳液的制备方法中,所述纳米二氧化硅的粒径为5-20nm,所述的丙烯酸烷基酯选自丙烯酸乙酯、丙烯酸丙酯和丙烯酸丁酯;所述的丙烯酰胺类单体选自甲基丙烯酰丙基三甲基氯化铵和甲基丙烯酰氧乙基三甲基氯化铵;所述的羟基丙烯酸酯单体为羟乙基甲基丙烯酸酯。
根据实施例,本发明提供的一种透明耐磨防静电涂料,其由下述质量百分比的组分组成:70-90%改性防静电丙烯酸树脂乳液,0.5-1.5%消泡剂,0.5-2%增稠剂,0.2-2%偶联剂,3-5%纳米氧化锌,3-5%纳米氧化铝,5-15%水。其中消泡剂为聚醚改性有机硅,增稠剂为羟乙基纤维素,偶联剂为硅烷偶联剂KH-450,纳米氧化锌和纳米氧化铝的粒径为5-30nm。
根据实施例,本发明提供的透明耐磨防静电涂料的制备方法,包括以下步骤:称取上述质量百分比的各组分,将消泡剂、增稠剂、偶联剂、纳米氧化锌、纳米氧化铝及水加入到乳液中,500-1000r/min下搅拌0.5-2h,过200目筛,制得透明耐磨防静电涂料。
相对于现有技术,本发明改性防静电丙烯酸酯树脂具有良好的透明性和防静电性,利用本发明改性防静电丙烯酸酯树脂制得的透明耐磨防静电涂料具有以下优势:(1)涂层无色透明,附着力强,可用于塑料、玻璃等多种材料表面,具有更广泛的适用范围;(2)涂层具有良好的加硬耐磨性能,电阻率可达107-108Ω·cm;(3)涂层便于施工,水性体系环保安全。
具体实施方式
下面结合具体实施例,进一步阐述本发明。这些实施例应理解为仅用于说明本发明而不用于限制本发明的保护范围。在阅读了本发明记载的内容之后,本领域技术人员可以对本发明作各种改动或修改,这些等效变化和修改同样落入本发明权利要求所限定的范围。
本发明以下实施例中所使用的原料如无特别标示均为市售产品。
实施例1
首先进行改性防静电丙烯酸酯树脂乳液的制备:
(1)纳米硅溶胶的制备。6g纳米二氧化硅均匀分散到40ml水中,加入0.3g分子量350的聚乙二醇,搅拌并超声20min。
(2)核预聚体的制备。0.4g过硫酸钠,1g十二烷基硫酸钠,和1g壬基酚聚氧乙烯醚,溶于50ml水中,将该溶液与纳米硅溶胶均匀混合。在45℃下,通入氮气,1200r/min高速搅拌,匀速滴加由5g苯乙烯,8g甲基丙烯酸甲酯,10g丙烯酸丁酯组成的混合核单体,剪切乳化,预聚7min。
(3)壳预聚体的制备。0.4g过硫酸钠和1g十二烷基硫酸钠,1g壬基酚聚氧乙烯醚,和0.5g碳酸氢钠溶于80ml水中。在45℃下,通入氮气,1200r/min高速搅拌,匀速滴加由8g甲基丙烯酰丙基三甲基氯化铵、10g羟乙基甲基丙烯酸酯组成的混合壳单体,剪切乳化,预聚5min。
(4)乳液聚合。控制温度70℃,通入氮气,壳预聚体在1h内匀速滴入核预聚体中,反应2h。乳液自然冷却至室温,氨水调节pH为7.5,200目筛过滤。
随后对各组分进行配比称量:80g改性防静电丙烯酸树脂乳液,0.5g聚醚改性有机硅BYK-333,0.5g羟乙基纤维素,0.5g硅烷偶联剂KH-450,3g纳米氧化锌,5g纳米氧化铝,10g水。
最后进行功能涂料的制备。将上述称量的聚醚改性有机硅BYK-333、羟乙基纤维素、硅烷偶联剂KH-450、纳米氧化锌、纳米氧化铝、水缓慢加入树脂乳液中,1000r/min下搅拌0.5h,搅拌均匀,过200目筛,制得透明耐磨防静电涂料。
实施例2
首先进行改性防静电丙烯酸酯树脂乳液的制备:
(1)纳米硅溶胶的制备。8g纳米二氧化硅均匀分散到50ml水中,加入0.5g分子量200的聚乙二醇,搅拌并超声30min。
(2)核预聚体的制备。0.5g过硫酸钠,2g十二烷基硫酸钠,和2g壬基酚聚氧乙烯醚,溶于60ml水中,将该溶液与纳米硅溶胶均匀混合。在45℃下,通入氮气,1200r/min高速搅拌,匀速滴加由6g苯乙烯,10g甲基丙烯酸甲酯,10g丙烯酸丁酯,2g丙烯酸乙酯组成的混合核单体,剪切乳化,预聚15min。
(3)壳预聚体的制备。0.5g过硫酸钠和1g十二烷基硫酸钠,1g壬基酚聚氧乙烯醚,和0.5g碳酸氢钠溶于100ml水中。在45℃下,通入氮气,1200r/min高速搅拌,匀速滴加由10g甲基丙烯酰氧乙基三甲基氯化铵,5g甲基丙烯酰胺、10g N-羟甲基丙烯酸酰胺组成的混合壳单体,剪切乳化,预聚8min。
(4)乳液聚合。控制温度75℃,通入氮气,壳预聚体在1h内匀速滴入核预聚体中,反应3h。乳液自然冷却至室温,氨水调节pH为7.5,200目筛过滤。
随后对各组分进行配比称量:85g改性防静电丙烯酸树脂乳液,1g聚醚改性有机硅BYK-333,1g羟乙基纤维素,0.5g硅烷偶联剂KH-450,5g纳米氧化锌,3g纳米氧化铝,15g水。
最后进行功能涂料的制备。将上述称量的聚醚改性有机硅BYK-333、羟乙基纤维素、硅烷偶联剂KH-450、纳米氧化锌、纳米氧化铝、水缓慢加入树脂乳液中,1000r/min下搅拌0.5h,搅拌均匀,过200目筛,制得透明耐磨防静电涂料。
实施例3
首先进行改性防静电丙烯酸酯树脂乳液的制备:
(1)纳米硅溶胶的制备。5g纳米二氧化硅均匀分散到30ml水中,加入0.5g分子量200的聚乙二醇,搅拌并超声30min。
(2)核预聚体的制备。0.3g过硫酸钠,1g十二烷基硫酸钠,和1g壬基酚聚氧乙烯醚,溶于40ml水中,将该溶液与纳米硅溶胶均匀混合。在45℃下,通入氮气,1200r/min高速搅拌,匀速滴加由4g苯乙烯,4g甲基丙烯酸甲酯,5g丙烯酸丁酯,2g丙烯酸丙酯组成的混合核单体,剪切乳化,预聚10min。
(3)壳预聚体的制备。0.3g过硫酸钠和1g十二烷基硫酸钠,1g壬基酚聚氧乙烯醚,和0.3g碳酸氢钠溶于60ml水中。在45℃下,通入氮气,1200r/min高速搅拌,匀速滴加由8g甲基丙烯酰丙基三甲基氯化铵、8g羟乙基甲基丙烯酸酯、6g N-羟甲基丙烯酸酰胺组成的混合壳单体,剪切乳化,预聚5min。
(4)乳液聚合。控制温度80℃,通入氮气,壳预聚体在1h内匀速滴入核预聚体中,反应2h。乳液自然冷却至室温,氨水调节pH为7.5,200目筛过滤。
随后对各组分进行配比称量:70g改性防静电丙烯酸树脂乳液,0.5g聚醚改性有机硅,0.5g羟乙基纤维素,0.3g硅烷偶联剂KH-450,4g纳米氧化锌,4g纳米氧化铝,5g水。
最后进行功能涂料的制备。将上述称量的聚醚改性有机硅BYK-333、羟乙基纤维素、硅烷偶联剂KH-450、纳米氧化锌、纳米氧化铝、水缓慢加入树脂乳液中,1000r/min下搅拌0.5h,搅拌均匀,过200目筛,制得透明耐磨防静电涂料。
实施例4
首先进行改性防静电丙烯酸酯树脂乳液的制备:
(1)纳米硅溶胶的制备。7g纳米二氧化硅均匀分散到45ml水中,加入0.4g分子量350的聚乙二醇,搅拌并超声30min。
(2)核预聚体的制备。0.5g过硫酸钠,2g十二烷基硫酸钠,和1g壬基酚聚氧乙烯醚,溶于50ml水中,将该溶液与纳米硅溶胶均匀混合。在45℃下,通入氮气,1200r/min高速搅拌,匀速滴加由8g苯乙烯,5g甲基丙烯酸甲酯,12g丙烯酸丁酯组成的混合核单体,剪切乳化,预聚8min。
(3)壳预聚体的制备。0.5g过硫酸钠和2g十二烷基硫酸钠,1g壬基酚聚氧乙烯醚,和0.7g碳酸氢钠溶于85ml水中。在45℃下,通入氮气,1200r/min高速搅拌,匀速滴加由10g甲基丙烯酰丙基三甲基氯化铵、12g羟乙基甲基丙烯酸酯组成的混合壳单体,剪切乳化,预聚5min。
(4)乳液聚合。控制温度75℃,通入氮气,壳预聚体在1h内匀速滴入核预聚体中,反应2.5h。乳液自然冷却至室温,氨水调节pH为7.5,200目筛过滤。
随后对各组分进行配比称量:70g改性防静电丙烯酸树脂乳液,0.5g聚醚改性有机硅BYK-333,0.5g羟乙基纤维素,0.5g硅烷偶联剂KH-450,4g纳米氧化锌,4g纳米氧化铝,5g水。
最后进行功能涂料的制备。将上述称量的聚醚改性有机硅BYK-333、羟乙基纤维素、硅烷偶联剂KH-450、纳米氧化锌、纳米氧化铝、水缓慢加入树脂乳液中,1000r/min下搅拌0.5h,搅拌均匀,过200目筛,制得透明耐磨防静电涂料。
实施例5
首先进行改性防静电丙烯酸酯树脂乳液的制备:
(1)纳米硅溶胶的制备。8g纳米二氧化硅均匀分散到50ml水中,加入0.2g分子量200的聚乙二醇,搅拌并超声30min。
(2)核预聚体的制备。0.4g过硫酸钠,1.5g十二烷基硫酸钠,和1.5g壬基酚聚氧乙烯醚,溶于50ml水中,将该溶液与纳米硅溶胶均匀混合。在45℃下,通入氮气,1200r/min高速搅拌,匀速滴加由3g苯乙烯,7g甲基丙烯酸甲酯,6g丙烯酸丙酯,5g丙烯酸丁酯组成的混合核单体,剪切乳化,预聚7min。
(3)壳预聚体的制备。0.4g过硫酸钠和1.5g十二烷基硫酸钠,1.5g壬基酚聚氧乙烯醚,和0.5g碳酸氢钠溶于80ml水中。在45℃下,通入氮气,1200r/min高速搅拌,匀速滴加由6g甲基丙烯酰丙基三甲基氯化铵、4g N-羟甲基丙烯酸酰胺、12g羟乙基甲基丙烯酸酯组成的混合壳单体,剪切乳化,预聚5min。
(4)乳液聚合。控制温度75℃,通入氮气,壳预聚体在1h内匀速滴入核预聚体中,反应3h。乳液自然冷却至室温,氨水调节pH为7.5,200目筛过滤。
随后对各组分进行配比称量:90g改性防静电丙烯酸树脂乳液,1g聚醚改性有机硅BYK-333,0.5g羟乙基纤维素,1g硅烷偶联剂KH-450,5g纳米氧化锌,5g纳米氧化铝,10g水。
最后进行功能涂料的制备。将上述称量的聚醚改性有机硅BYK-333、羟乙基纤维素、硅烷偶联剂KH-450、纳米氧化锌、纳米氧化铝、水缓慢加入树脂乳液中,1000r/min下搅拌0.5h,搅拌均匀,过200目筛,制得透明耐磨防静电涂料。
实施例6
首先进行改性防静电丙烯酸酯树脂乳液的制备:
(1)纳米硅溶胶的制备。6g纳米二氧化硅均匀分散到40ml水中,加入0.5g分子量750的聚乙二醇,搅拌并超声30min。
(2)核预聚体的制备。0.6g过硫酸钠,2g十二烷基硫酸钠,和1.5g壬基酚聚氧乙烯醚,溶于50ml水中,将该溶液与纳米硅溶胶均匀混合。在45℃下,通入氮气,1200r/min高速搅拌,匀速滴加由6g苯乙烯,7g甲基丙烯酸甲酯,4g丙烯酸乙酯,8g丙烯酸丁酯组成的混合核单体,剪切乳化,预聚7min。
(3)壳预聚体的制备。0.6g过硫酸钠和2g十二烷基硫酸钠,1.5g壬基酚聚氧乙烯醚,和0.6g碳酸氢钠溶于80ml水中。在45℃下,通入氮气,1200r/min高速搅拌,匀速滴加由7g甲基丙烯酰氧乙基三甲基氯化铵,5g甲基丙烯酰胺,12g羟乙基甲基丙烯酸酯组成的混合壳单体,剪切乳化,预聚5min。
(4)乳液聚合。控制温,75℃,通入氮气,壳预聚体在1h内匀速滴入核预聚体中,反应3h。乳液自然冷却至室温,氨水调节pH为7.5,200目筛过滤。
随后对各组分进行配比称量:85g改性防静电丙烯酸树脂乳液,1g聚醚改性有机硅,1g羟乙基纤维素,1g硅烷偶联剂KH-450,4份纳米氧化锌,5份纳米氧化铝,8g水。
最后进行功能涂料的制备。将上述称量的聚醚改性有机硅BYK-333、羟乙基纤维素、硅烷偶联剂KH-450、纳米氧化锌、纳米氧化铝、水缓慢加入树脂乳液中,1000r/min下搅拌0.5h,搅拌均匀,过200目筛,制得透明耐磨防静电涂料。
试验例
将上述各实施例1-6中涂料分别在洁净透明的PC塑料薄板和玻璃表面涂覆,涂层样品在80℃下烘烤120min制得。
测试各涂膜的外观、气味、附着力、铅笔硬度、耐磨性、可见光透过率和电阻率。其中,外观和气味通过实际观察体验得到,附着力通过百格法测试,铅笔硬度根据GB/T6739-2006相关标准检测测试,耐磨性根据GB/T1768-2006相关标准检测测试,可见光透射率通过太阳膜测试仪LS182测试,电阻率通过表面电阻测试仪Trek Model152-1测试。
从表1和表2的测试结果中可以看出,涂层外观无色透明,无刺激性气味,可见光透射率达到90%,具备较高的透明性;硬度达到3H,耐磨性可达0.10g/100r,附着力达到0级,涂层性能稳定;涂层电阻率达到107-108Ω·cm,防静电能力出众,在电子器件、板材、薄膜等方面均具有较高的应用价值。
表1.各实施例在PC基材表面的涂层性能测试
测试项目 | 实施例1 | 实施例2 | 实施例3 | 实施例4 | 实施例5 | 实施例6 |
外观 | 无色透明 | 无色透明 | 无色透明 | 无色透明 | 无色透明 | 无色透明 |
气味 | 无刺激 | 无刺激 | 无刺激 | 无刺激 | 无刺激 | 无刺激 |
硬度 | 2H | 3H | 2H | 3H | 3H | 2H |
耐磨性 | 0.15g/100r | 0.12g/100r | 0.16g/100r | 0.15g/100r | 0.10g/100r | 0.12g/100r |
附着力 | 0级 | 0级 | 0级 | 0级 | 0级 | 0级 |
可见光透射率 | 88% | 85% | 90% | 86% | 83% | 85% |
电阻率 | <![CDATA[10<sup>8</sup>Ω·cm]]> | <![CDATA[10<sup>7</sup>Ω·cm]]> | <![CDATA[10<sup>8</sup>Ω·cm]]> | <![CDATA[10<sup>7</sup>Ω·cm]]> | <![CDATA[10<sup>7</sup>Ω·cm]]> | <![CDATA[10<sup>7</sup>Ω·τcm]]> |
表2.各实施例在玻璃基材表面的涂层性能测试
测试项目 | 实施例1 | 实施例2 | 实施例3 | 实施例4 | 实施例5 | 实施例6 |
外观 | 无色透明 | 无色透明 | 无色透明 | 无色透明 | 无色透明 | 无色透明 |
气味 | 无刺激 | 无刺激 | 无刺激 | 无刺激 | 无刺激 | 无刺激 |
硬度 | 2H | 3H | 2H | 3H | 3H | 3H |
耐磨性 | 0.17g/100r | 0.12g/100r | 0.15g/100r | 0.13g/100r | 0.12g/100r | 0.13g/100r |
附着力 | 0级 | 0级 | 0级 | 0级 | 0级 | 0级 |
可见光透射率 | 89% | 86% | 90% | 85% | 82% | 85% |
电阻率 | <![CDATA[10<sup>8</sup>Ω·τcm]]> | <![CDATA[10<sup>7</sup>Ω·cm]]> | <![CDATA[10<sup>8</sup>Ω·cm]]> | <![CDATA[10<sup>7</sup>Ω·cm]]> | <![CDATA[10<sup>7</sup>Ω·τcm]]> | <![CDATA[10<sup>7</sup>Ω·τcm]]> |
Claims (6)
1.一种改性防静电丙烯酸树脂的制备方法,其特征在于,包括如下步骤:
(1)纳米硅溶胶的制备:根据重量份,将2-10份纳米二氧化硅均匀分散到10-50份水中,加入0.2-0.5份分子量200-750的聚乙二醇,搅拌并超声10-30min,制得纳米硅溶胶;
(2)核预聚体的制备:根据重量份,将0.3-0.8份过硫酸钠、1-3份十二烷基硫酸钠和1-3份壬基酚聚氧乙烯醚,溶于40-80份水中,将该溶液与步骤(1)中制得的纳米硅溶胶均匀混合;在45-60℃下,通入氮气,1000-1500r/min高速搅拌,匀速滴加由1-8份苯乙烯、3-15份甲基丙烯酸甲酯和3-15份丙烯酸烷基酯组成的混合核单体,剪切乳化,预聚5-20min,制得核预聚体;
(3)壳预聚体的制备:根据重量份,将0.3-0.8份过硫酸钠、1-3份十二烷基硫酸钠、1-3份壬基酚聚氧乙烯醚和0.5-1份碳酸氢钠溶于40-100份水中;在45-60℃下,通入氮气,1000-1500r/min高速搅拌,匀速滴加由2-15份甲基丙烯酰丙基三甲基氯化铵或甲基丙烯酰氧乙基三甲基氯化铵、2-15份羟基丙烯酸酯单体或N-羟甲基丙烯酸酰胺组成的混合壳单体,剪切乳化预聚5-30min,制得壳预聚体;
(4)乳液聚合:控制温度50-80℃,通入氮气,将壳预聚体在1-2h内滴入核预聚体中,反应1-3h;乳液自然冷却至室温,氨水调节pH为7-7.5,200目筛过滤,制得改性防静电丙烯酸树脂乳液。
2.根据权利要求1所述的改性防静电丙烯酸树脂的制备方法,其特征在于,所述纳米二氧化硅的粒径为5-20nm。
3.根据权利要求1所述的改性防静电丙烯酸树脂的制备方法,其特征在于,所述丙烯酸烷基酯选自丙烯酸乙酯、丙烯酸丙酯和丙烯酸丁酯。
4.根据权利要求1所述的改性防静电丙烯酸树脂的制备方法,其特征在于,所述羟基丙烯酸酯单体为羟乙基甲基丙烯酸酯。
5.一种透明耐磨防静电涂料,其特征是,其由下述质量百分比的组分组成:
权利要求1-4任一项制备方法制得的改性防静电丙烯酸树脂乳液70-90%,
消泡剂0.5-1.5%,
增稠剂0.5-2%,
偶联剂0.2-2%,
纳米氧化锌3-5%,
纳米氧化铝3-5%,
水5-15%,
其中,纳米氧化锌粒径为5-30nm,纳米氧化铝粒径为5-30nm,消泡剂为聚醚改性有机硅,增稠剂为羟乙基纤维素,偶联剂为硅烷偶联剂KH-450。
6.一种透明耐磨防静电涂料的制备方法,其特征在于,称取权利要求5所述质量百分比的组分,将消泡剂、增稠剂、偶联剂、纳米氧化锌、纳米氧化铝及水加入到乳液中,500-1000r/min下搅拌0.5-2h,过200目筛,制得透明耐磨防静电涂料。
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