具有核壳结构的预分散C.I.颜料橙34的制备

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摘要色母粒是传统预分散有机颜料剂型,制备工艺相对复杂,着色时过滤分散值较大,颜料分散性亟待提高。以3,3'-二氯联苯胺(DCB)和对甲苯基吡唑酮为原料,经重氮化偶合反应得到C.I.颜料橙34(PO34)与水的混合液,加热条件下使PO34与外层熔融的110型聚乙烯蜡(PE)结合,获得了颗粒均匀、分散性好的预分散PO34新剂型(PPO34)。通过调控PE与PO34的质量比、PE的粒径、加热时间与加热温度、搅拌速率等实验条件,研究其对预分散颜料应用性能的影响规律。通过形貌、着色性能数据对比得到PPO34制备较适宜条件为:m(PE)∶m(PO34)为1∶1、41~60目PE、加热时间20 min、加热温度90 ℃、机械搅拌速率为200 r·min^-1。上述条件制得的PPO34粒径均一,具有明显核壳结构。与原始PO34相比,疏水性能显著增强,含水量低,过滤时间短,避免了生产中滤饼板结和强力粉碎产生的粉尘,更加环保高效;与传统色母粒相比,分散性能更好,在保持与原颜料相近的色光、明暗度、饱和度和色相等颜料性能前提下,提高了颜料着色强度,改进了其他多方面应用性能。

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关键词： C.I.颜料橙34 聚乙烯蜡预分散核壳结构颜料改性

Abstract： In the coloring process of traditional organic pigment masterbatch, the filter dispersion value of the masterbatch is relatively large, pigment dispersion needs to be improved, and the preparation process is complicated. Using 3,3'-dichlorobenzidine(DCB) and p-tolylpyrazolone as raw materials, a diazotization coupling reaction was carried out to obtain a mixture of C.I. Pigment Orange 34 (PO34) and water. 110-Type polyethylene wax (PE) was added under heating condition in order to combine the PO34 with the melted PE outer layer to yield the desired pre-dispersed PO34 (PPO34) with uniform morphology and good dispersibility. By changing mass ratio of PE and PO34, particle size of PE, heating time and heating temperature, stirring rate and other experimental conditions, the effects on the performance of the pigments were studied. The better condition obtained by comparing the morphology and coloring data is as follow: particle size of polyethylene wax 41—60 mesh, mass ratio of PE and PO34 1∶1, heating time 20 min, heating at 90 ℃, mechanical stirring rate 200 r·min^-1. The pre-dispersed PO34 prepared under this condition has obvious core-shell structure and uniform particle size. Compared with original PO34, PPO34 exhibited better hydrophobic properties and lower water content, which resulted to a short filtration time. The preparation of PPO34 is more environmentally friendly and efficient, which avoid of the dust pollution from the traditional hard filtration cake pulverized process. Compared with the masterbatch addition process, PPO34 exhibited better dispersion performance. Under the premise of maintaining the pigment properties similar to the original pigment in shade, brightness, saturation, and color, the color strength of the pigment is enhanced, and the various properties of the pigment are also improved.

Keywords： C.I. pigment orange 34 polyethylene wax pre-dispersion nuclear-shell structure pigment modification

Received 2022-01-06;

Fund:泰山产业领军人才工程项目(tscx202211094)和德州市重大科技创新工程项目。

Corresponding Authors: 李彬,副教授,E-mail:libin@tju.edu.cn;姜爽,副教授,E-mail:shuangjiang@tju.edu.cn。 Email: libin@tju.edu.cn;shuangjiang@tju.edu.cn

About author: 张天永(1966-),男,教授,博士生导师,现从事精细化学品制备方面的研究。

引用本文:

张天永, 王昱童, 刘万兴, 李彬, 姜爽, 吕东军.具有核壳结构的预分散C.I.颜料橙34的制备[J]. 化学工业与工程, 2024,41(1): 12-20

ZHANG Tianyong, WANG Yutong, LIU Wanxing, LI Bin, JIANG Shuang, LYU Dongjun.Preparation of pre-dispersed C.I. Pigment Orange 34 with core-shell structure[J]. Chemcial Industry and Engineering, 2024,41(1): 12-20

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