CN111410911A - 石墨烯改性高tg2重防腐粉末涂料及其制备方法 - Google Patents

石墨烯改性高tg2重防腐粉末涂料及其制备方法 Download PDF

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CN111410911A
CN111410911A CN202010338978.4A CN202010338978A CN111410911A CN 111410911 A CN111410911 A CN 111410911A CN 202010338978 A CN202010338978 A CN 202010338978A CN 111410911 A CN111410911 A CN 111410911A
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李德
周诚
尹沂磊
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Changzhou Carbonexplore New Material Technology Co ltd
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Abstract

本发明公开了一种石墨烯改性高TG2重防腐粉末涂料，属于特殊涂料技术领域，包括A组分和B组分，每组分中各物料按照质量分数计算，所述A组分包括：改性环氧树脂、异氟尔酮、颜填料、安息香、三聚磷锌铝、改性石墨烯、流平剂、固化促进剂；所述B组分包括酚类固化剂、柔性环氧树脂、聚丙烯酸酯。本发明利用石墨烯的改性在石墨烯基团上嫁接特殊的含氧官能团，该含氧官能团可以加速特种环氧与特殊固化剂的高密度交联反应从而得到高密度的固化涂膜，提升涂膜的TG2和涂膜的物理机械性能。

Description

石墨烯改性高TG2重防腐粉末涂料及其制备方法
技术领域
本发明涉及一种石墨烯改性高TG2重防腐粉末涂料及其制备方法，属于特殊涂料技术领域。
背景技术
高TG2重防腐涂料一直是国内空白，国内重防腐涂料的TG2普遍是介于 115～130℃之间，高于这些温度的重防腐涂料均依靠进口或国内一些外资企业，且市场上高TG2重防腐涂料存在韧性不足等物理性能低及耐高温高压釜加速测试性能不稳定的缺点。
发明内容
针对现有技术中存在的问题，本发明公开了一种石墨烯改性高TG2重防腐粉末涂料及其制备方法，利用石墨烯的改性在石墨烯基团上嫁接特殊的含氧官能团，该含氧官能团可以加速特种环氧与特殊固化剂的高密度交联反应从而得到高密度的固化涂膜，提升涂膜的TG2和涂膜的物理机械性能。
本发明的上述技术目的是通过以下技术方案得以实现的：
所述A组分包括：
Figure BDA0002467839810000011
所述B组分包括：
酚类固化剂 65～75％
柔性环氧树脂 23～27％
聚丙烯酸酯 2～8％。
优选地，所述改性环氧树脂为氨基聚硅氧烷改性氢化双酚A环氧树脂。
优选地，所述柔性环氧树脂为聚氨酯增韧环氧树脂E-51。
优选地，所述改性石墨烯为3-疏丙基三乙氧基硅烷与氧化石墨烯反应得到的改性氧化石墨烯。
优选地，所述酚类固化剂为KD-401，KD-404，KD-404J或KD-405。
优选地，所述固化促进剂为亚磷酸三苯酯、2-乙基-4甲基咪唑、四甲基胍或三氰化硼氨络合物。
优选地，所述颜填料为硅灰石、硅微粉、云母氧化铁、二氧化硅、二氧化钛、氧化镁中的一种或多种混合物。
优选地，所述流平剂为PLP100、PV88、ModaflowⅡ或者ModaflowⅢ。
优选地，所述A组分与所述B组分的质量配比为2:3～3:1。
一种石墨烯改性高TG2重防腐粉末涂料的制备方法，具体步骤如下：
S1、将混炼挤出分散装置的螺筒加热到100℃-200℃，将A组分中的各物料按比例添加至混炼挤出分散装置的料斗中；
S2、启动混炼挤出分散装置的螺杆，调整螺杆的转速为45～80r·min-1，待螺杆转速稳定后，启动进料器，料斗中的混合物经螺筒中的螺杆挤出；
S3、将挤出后的混合物进行冷却处理，当混合物料充分冷却后，将混合物料送入压片机中进行破碎处理；
S4、将经破碎处理后的混合物料送入研磨机中进行研磨过250目筛，得到A 组分混合粉末；
S5、将B组分中的各物料按比例添加至研磨机中进行研磨过250目筛，得到B组分混合粉末；
S6、将步骤S4得到的A组分混合粉末和步骤S5得到B组分混合粉末按比例添加至搅拌分散釜中进行充分混合，即为石墨烯改性高TG2重防腐粉末涂料。
有益效果：本发明公开了一种石墨烯改性高TG2重防腐粉末涂料及其制备方法，具有如下优点：
1)通过对石墨烯的改性在石墨烯基团上嫁接特殊的含氧官能团，该含氧官能团可以加速特种环氧与特殊固化剂的高密度交联反应从而得到高密度的固化涂膜，提升涂膜的TG2和涂膜的物理机械性能,较高的TG2和涂膜物理机械性能保证了涂膜可以完全通过高温高压釜加速测试；
2)基于酚类固化剂，还添加了柔性环氧树脂与改性环氧树脂形成固化交联，引入柔性链，从而提高了了涂料的韧性，进一步加强了涂料的物理机械性能；
3)改性环氧树脂采用氨基聚硅氧烷改性氢化双酚A环氧树脂，在氢化双酚 A树脂中引入氨基官能化的聚硅氧烷，增强了其与固化剂和柔性环氧树脂的交联强化作用，同时加入聚丙烯酸酯，形成网络互穿结构，不仅加速了交联固化时间，同时降低了交联固化温度，进一步提高了涂料的力学性能；
4)采用固化促进剂进一步加速了固化时间，降低了固化温度。
具体实施方式
实施例1一种石墨烯改性高TG2重防腐粉末涂料，包括A组分和B组分，每组分中各物料按照质量分数计算，
所述A组分包括：
Figure BDA0002467839810000031
所述B组分包括：
KD-401 65％
聚氨酯增韧环氧树脂E-51 27％
聚丙烯酸酯 8％。
其中，A组分与B组分的质量配比为2:3。
实施例2一种石墨烯改性高TG2重防腐粉末涂料，包括A组分和B组分，每组分中各物料按照质量分数计算，
所述A组分包括：
Figure BDA0002467839810000032
Figure BDA0002467839810000041
所述B组分包括：
KD-401 70％
聚氨酯增韧环氧树脂E-51 25％
聚丙烯酸酯 5％。
其中，A组分与B组分的质量配比为1:1。
实施例3一种石墨烯改性高TG2重防腐粉末涂料，包括A组分和B组分，每组分中各物料按照质量分数计算，
所述A组分包括：
Figure BDA0002467839810000042
所述B组分包括：
KD-404 75％
聚氨酯增韧环氧树脂E-51 23％
聚丙烯酸酯 2％。
其中，A组分与B组分的质量配比为3:1。
实施例1、实施例2和实施例3均按下述制备步骤进行制备：
一种石墨烯改性高TG2重防腐粉末涂料的制备方法，具体步骤如下：
S1、将混炼挤出分散装置的螺筒加热到200℃，将A组分中的各物料按比例添加至混炼挤出分散装置的料斗中；
S2、启动混炼挤出分散装置的螺杆，调整螺杆转速为65r·min-1，待螺杆转速稳定后，启动进料器，料斗中的混合物经螺筒中的螺杆挤出；
S3、将挤出后的混合物进行冷却处理，当混合物料充分冷却后，将混合物料送入压片机中进行破碎处理；
S4、将经破碎处理后的混合物料送入研磨机中进行研磨过250目筛，得到A 组分混合粉末；
S5、将B组分中的各物料按比例添加至研磨机中进行研磨过250目筛，得到B组分混合粉末；
S6、将步骤S4得到的A组分混合粉末和步骤S5得到B组分混合粉末按比例添加至搅拌分散釜中进行充分混合，即为石墨烯改性高TG2重防腐粉末涂料。
分别对实施例1、2、3的产品和现有产品(特瑞防腐粉末涂料)进行性能测试，测试结果如表1所示：
表1
Figure BDA0002467839810000051
从上表可知，本发明提供的石墨烯改性高TG2重防腐粉末涂料的制备方法与现有技术相比，本发明可以提升涂膜的TG2(130℃≤TG2≤160℃)和涂膜的物理机械性能(-20℃，3°弯曲无裂痕)，较高的TG2和涂膜物理机械性能保证了涂膜可以完全通过高温高压釜(35MPa/107℃/48h，涂膜完好，附着力无变化)加速测试。
本具体实施例仅仅是对本发明的解释，其并不是对本发明的限制，本领域技术人员在阅读完本说明书后可以根据需要对本实施例做出没有创造性贡献的修改，但只要在本发明的权利要求范围内都受到专利法的保护。

Claims (10)

1.一种石墨烯改性高TG2重防腐粉末涂料，其特征在于，包括A组分和B组分，每组分中各物料按照质量分数计算，
所述A组分包括：
改性环氧树脂 48~76%
异氟尔酮 1~3%
颜填料 7~22%
安息香 0.3~0.8%
三聚磷锌铝 6~13%
改性石墨烯 1~3%
流平剂 6~12%
固化促进剂 2-8%
所述B组分包括：
酚类固化剂 65~75%
柔性环氧树脂 23~27%
聚丙烯酸酯 2~8%。
2.根据权利要求1所述的石墨烯改性高TG2重防腐粉末涂料，其特征在于，所述改性环氧树脂为氨基聚硅氧烷改性氢化双酚A环氧树脂。
3.根据权利要求1所述的石墨烯改性高TG2重防腐粉末涂料，其特征在于，所述柔性环氧树脂为聚氨酯增韧环氧树脂E-51。
4.根据权利要求1所述的石墨烯改性高TG2重防腐粉末涂料，其特征在于，所述改性石墨烯为3-疏丙基三乙氧基硅烷与氧化石墨烯反应得到的改性氧化石墨烯。
5.根据权利要求1所述的石墨烯改性高TG2重防腐粉末涂料，其特征在于，所述酚类固化剂为KD-401，KD-404，KD-404J或KD-405。
6.根据权利要求1所述的石墨烯改性高TG2重防腐粉末涂料，其特征在于，所述固化促进剂为亚磷酸三苯酯、2-乙基-4甲基咪唑、四甲基胍或三氰化硼氨络合物。
7. 根据权利要求1所述的石墨烯改性高TG2重防腐粉末涂料，其特征在于，所述颜填料为硅灰石、硅微粉、云母氧化铁、二氧化硅、二氧化钛、 氧化镁中的一种或多种混合物。
8.根据权利要求1所述的石墨烯改性高TG2重防腐粉末涂料，其特征在于，所述流平剂为PLP100、PV88、ModaflowⅡ或者ModaflowⅢ。
9.根据权利要求1所述的石墨烯改性高TG2重防腐粉末涂料，其特征在于，所述A组分与所述B组分的质量配比为2:3~3:1。
10.一种石墨烯改性高TG2重防腐粉末涂料的制备方法，其特征在于，权利要求1-9所述的石墨烯改性超耐候粉末涂料的具体步骤如下：
S1、将混炼挤出分散装置的螺筒加热到100℃-200℃，将A组分中的各物料按比例添加至混炼挤出分散装置的料斗中；
S2、启动混炼挤出分散装置的螺杆，调整螺杆的转速为45～80r·min-1，待螺杆转速稳定后，启动进料器，料斗中的混合物经螺筒中的螺杆挤出；
S3、将挤出后的混合物进行冷却处理，当混合物料充分冷却后，将混合物料送入压片机中进行破碎处理；
S4、将经破碎处理后的混合物料送入研磨机中进行研磨过250目筛，得到A组分混合粉末；
S5、将B组分中的各物料按比例添加至研磨机中进行研磨过250目筛，得到B组分混合粉末；
S6、将步骤S4得到的A组分混合粉末和步骤S5得到B组分混合粉末按比例添加至搅拌分散釜中进行充分混合，即为石墨烯改性高TG2重防腐粉末涂料。
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