CN110724449B - 一种聚碳酸酯改性耐磨涂料及其制备方法 - Google Patents
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Abstract
本发明涉及一种聚碳酸酯改性耐磨涂料及其制备方法。所述聚碳酸酯改性耐磨涂料,其由A、B两种组分组成,所述A组分包括聚碳酸酯/聚酯树脂混合物、丙烯酸树脂、含羟基硅油、纳米氧化锆以及分散溶剂;所述B组分包括异氰酸酯。本发明所提供的聚碳酸酯改性耐磨涂料,其通过利用聚碳酸酯对聚酯树脂进行嫁接改性,通过两者之间形成的韧性高且具有拉伸力的化学键,通过其体系的拉伸及收缩来减弱或消除外界施加的摩擦力,并与丙烯酸树脂、纳米氧化锆混合,赋予了所制得耐磨涂料的耐磨性能,同时由于其空间结构具有一定的弹性,使得涂抹形成的涂层具有一定的自修复能力。
Description
技术领域
本发明涉及聚氨酯涂料技术领域,特别是涉及一种聚碳酸酯改性耐磨涂料及其制备方法。
背景技术
聚氨酯涂料是目前较常见的一类涂料,可以分为双组分聚氨酯涂料和单组分聚氨酯涂料。双组分聚氨酯涂料一般是由异氰酸酯预聚物(也叫低分子氨基甲酸酯聚合物)和含羟基树脂两部分组成,通常称为固化剂组分和主剂组分。这一类涂料的品种很多,应用范围也很广,根据含羟基组分的不同可分为丙烯酸聚氨酯、醇酸聚氨酯、聚酯聚氨酯、聚醚聚氨酯、环氧聚氨酯等品种。双组分聚氨酯涂料一般都具有良好的机械性能、较高的固体含量、各方面的性能都比较好。是目前很有发展前途的一类涂料品种。
目前,双组份聚氨酯涂料存在涂层耐磨性能差,涂层易刮伤及刮伤后无法自修复的缺陷,使得涂层在使用一段时间后的装饰性及对基材的保护性大大下降。
发明内容
基于此,本发明的目的在于,提供一种聚碳酸酯改性耐磨涂料,其具有耐磨性能好、不易刮伤同时能自修复的优点。
一种聚碳酸酯改性耐磨涂料,其由A、B两种组分组成,所述A组分包括聚碳酸酯、聚酯树脂单体组合物、丙烯酸树脂、含羟基硅油、纳米氧化锆以及分散溶剂,所述聚酯树脂单体组合物包括羧基单体和羟基单体;所述B组分包括异氰酸酯。
本发明所提供的聚碳酸酯改性耐磨涂料,其通过利用聚碳酸酯对聚酯树脂进行嫁接改性,通过两者之间形成的韧性高且具有拉伸力的化学键,通过其体系的拉伸及收缩来减弱或消除外界施加的摩擦力,结合含羟基硅油具有的润滑、降低磨料表面能以及降低摩擦系数作用,进一步减弱摩擦力,同时与丙烯酸树脂、纳米氧化锆混合,赋予了所制得耐磨涂料的耐磨性能,同时由于其空间结构的化学键具有一定的弹性,使得涂抹形成的涂层具有一定的自修复能力。
所述A组分由以下重量份数计的各原料组成:
聚碳酸酯/聚酯树脂单体组合物混合物中聚碳酸酯与聚酯树脂单体组合物的比例为1:9-3:7;
所述B组分由以下重量份数计的原料组成:
异氰酸酯 15-25
进一步地,所述羧基单体选自间苯二甲酸、四氢苯酐、六氢苯酐、己二酸中的一种或几种;所述羟基单体选自三羟甲基丙烷、三羟甲基乙烷、新戊二醇、甲基丙二醇、1,6-己二醇中的一种或几种。
进一步地,所述纳米氧化锆粒径小于5μm,耐磨性能良好,所述含羟基硅油为含羟基聚二甲基硅油,其具有良好的化学稳定性,降低表面能及降低摩擦系数效果好。
进一步地,所述分散溶剂为丙二醇甲醚醋酸酯,其对各组分原料的溶解性良好,且环保无毒。
进一步地,所述异氰酸酯为脂肪族多异氰酸酯。
另外,本发明还提供了一种聚碳酸酯改性耐磨涂料的制备方法,其包括以下具体操作步骤:
S1、按照权利要求1所述配方量称取原料,将聚碳酸酯/聚酯树脂单体组合物混合物、丙烯酸树脂、含羟基硅油依次加入反应釜中,加热后进行保温分散,分散均匀后对其进行降温;
S2、往步骤S1中所得混合物中边分散边加入纳米氧化锆,并进行保温分散,随后再加入分散溶剂,混合均匀后进行降温;
S3、对步骤S2中所得混合物进行过滤得A组分,对异氰酸酯进行过滤得B组分。
进一步地,步骤S1中为在800-1000rpm转速条件下,加热1h使温度上升至140-150℃并保温分散2h,随后降温至75-85℃。
进一步地,步骤S2中为在300rpm-500rpm转速条件下,往步骤S2所得混合物中边分散边加入纳米氧化锆,并在800rpm-1000rpm转速条件下,在70-75℃下保温分散1h,加入分散溶剂后在300-500rpm转速条件下降温到25-35℃。
进一步地,步骤S3中所述A组分为使用15μm滤袋进行过滤;所述B组分为使用5μm滤袋进行过滤,以避免A、B组分内存在有未分散均匀的大颗粒,以对所制得耐磨涂料产生影响。
相对于现有技术,本发明所提供的聚碳酸酯改性耐磨涂料,其通过利用聚碳酸酯对聚酯树脂进行嫁接改性,通过两者之间形成的韧性高且具有拉伸力的化学键,通过其体系的拉伸及收缩来减弱或消除外界施加的摩擦力,结合含羟基硅油具有的润滑、降低磨料表面能以及降低摩擦系数作用,进一步减弱摩擦力,同时与丙烯酸树脂、纳米氧化锆混合,赋予了所制得耐磨涂料的耐磨性能,同时由于其空间结构的化学键具有一定的弹性,使得涂抹形成的涂层具有一定的自修复能力。所提供的聚碳酸酯改性耐磨涂料的制备方法,生产工艺简单,无需添加其他助剂,避免了副反应的产生;在反应釜内加热即可进行反应,设备简单、成本较低,两组份分别制备,在使用时混合即用,能够避免组分之间提前发生自固化反应,延长储存时间,保证产品性能。
具体实施方式
实施例1
本实施例提供一种聚碳酸酯改性耐磨涂料,其由A、B两种组分组成,
所述A组分由以下重量份数计的各原料组成:
其中聚碳酸酯/聚酯树脂单体组合物混合物中聚碳酸酯与聚酯树脂单体组合物的比例为1:9,所述纳米氧化锆粒径为小于5μm,所述羧基单体为间苯二甲酸,所述羟基单体选自三羟基甲基丙烷,羧基单体与羟基单体比例为1:1。
所述B组分由以下重量份数计的原料组成:
异氰酸酯 15
所述异氰酸酯为脂肪族多异氰酸酯。
实施例2
本实施例提供一种聚碳酸酯改性耐磨涂料,其由A、B两种组分组成,
所述A组分由以下重量份数计的各原料组成:
其中聚碳酸酯/聚酯树脂单体组合物混合物中聚碳酸酯与聚酯树脂单体组合物的比例为1:9,所述纳米氧化锆粒径为小于5μm,所述羧基单体为四氢苯酐,所述羟基单体选自三羟甲基乙烷和甲基丙二醇,羧基单体与羟基单体比例为2:1。
所述B组分由以下重量份数计的原料组成:
异氰酸酯 25
实施例3
本实施例提供一种聚碳酸酯改性耐磨涂料,其由A、B两种组分组成,
所述A组分由以下重量份数计的各原料组成:
其中聚碳酸酯/聚酯树脂单体组合物混合物中聚碳酸酯与聚酯树脂单体组合物的比例为1:9,所述纳米氧化锆粒径为小于5μm,所述羧基单体为己二酸和六氢苯酐,所述羟基单体选自新戊二醇,羧基单体与羟基单体比例为1:2。
所述B组分由以下重量份数计的原料组成:
异氰酸酯 20
实施例4
本实施例提供一种聚碳酸酯改性耐磨涂料的制备方法,其具体包括以下操作步骤:
S1、分别按照以上所述配方量称取原料,将聚碳酸酯/聚酯树脂单体组合物混合物、丙烯酸树脂、含羟基硅油依次加入反应釜中,在800-1000rpm转速条件下,加热1h使温度上升至140-150℃并保温分散2h,随后降温至75-85℃;
S2、在300-500rpm转速条件下,往步骤S2所得混合物中边分散边加入纳米氧化锆,并在800-1000rpm转速条件下,在70-75℃下保温分散1h,随后再加入丙二醇甲醚醋酸酯,并在300-500rpm转速条件下降温到25-35℃;
S3、使用15μm滤袋对步骤S2中所得混合物进行过滤得A组分,使用5μm滤袋对异氰酸酯进行过滤得B组分。
实施例5
对以上制得的聚碳酸酯改性耐磨涂料进行性能测试,测试结果如表一所示:
由测试结果可得,本发明所提供的聚碳酸酯改性耐磨涂料,其耐磨性能及耐磨耗性能好,同时其具有一定的自修复性能,所形成的涂层对于一些微小刮痕能够自修复。
相对于现有技术,本发明所提供的聚碳酸酯改性耐磨涂料,其通过利用聚碳酸酯对聚酯树脂进行嫁接改性,通过两者之间形成的韧性高且具有拉伸力的化学键,通过其体系的拉伸及收缩来减弱或消除外界施加的摩擦力,结合含羟基硅油具有的润滑、降低磨料表面能以及降低摩擦系数作用,进一步减弱摩擦力,同时与丙烯酸树脂、纳米氧化锆混合,赋予了所制得耐磨涂料的耐磨性能,同时由于其空间结构的化学键具有一定的弹性,使得涂抹形成的涂层具有一定的自修复能力。所提供的聚碳酸酯改性耐磨涂料的制备方法,生产工艺简单,无需添加其他助剂,避免了副反应的产生;在反应釜内加热即可进行反应,设备简单、成本较低,两组份分别制备,在使用时混合即用,能够避免组分之间提前发生自固化反应,延长储存时间,保证产品性能。
以上所述实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。
Claims (8)
2.根据权利要求1所述的聚碳酸酯改性耐磨涂料,其特征在于:所述纳米氧化锆粒径小于5μm;所述含羟基硅油为含羟基聚二甲基硅油。
3.根据权利要求1所述的聚碳酸酯改性耐磨涂料,其特征在于:所述分散溶剂为丙二醇甲醚醋酸酯。
4.根据权利要求1所述的聚碳酸酯改性耐磨涂料,其特征在于:所述异氰酸酯为脂肪族多异氰酸酯。
5.一种聚碳酸酯改性耐磨涂料的制备方法,其特征在于,包括以下具体操作步骤:
S1、按照权利要求1所述配方量称取原料,将聚碳酸酯/聚酯树脂单体组合物混合物、丙烯酸树脂、含羟基硅油依次加入反应釜中,加热后进行保温分散,分散均匀后对其进行降温;
S2、往步骤S1中所得混合物中边分散边加入纳米氧化锆,并进行保温分散,随后再加入分散溶剂,混合均匀后进行降温;
S3、对步骤S2中所得混合物进行过滤得A组分,对异氰酸酯进行过滤得B组分。
6.根据权利要求5所述聚碳酸酯改性耐磨涂料的制备方法,其特征在于:步骤S1中为在800-1000rpm转速条件下,加热1h使温度上升至140-150℃并保温分散2h,随后降温至75-85℃。
7.根据权利要求5所述聚碳酸酯改性耐磨涂料的制备方法,其特征在于:步骤S2中为在300-500rpm转速条件下,往步骤S2所得混合物中边分散边加入纳米氧化锆,并在800-1000rpm转速条件下,在70-75℃下保温分散1h,加入分散溶剂后在300-500rpm转速条件下降温到25-35℃。
8.根据权利要求5所述聚碳酸酯改性耐磨涂料的制备方法,其特征在于:步骤S3中所述A组分为使用15μm滤袋进行过滤得到的;所述B组分为使用5μm滤袋进行过滤得到的。
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