摘要： 粉末涂料以其特有的环保性和优异的涂装效果运用于多个领域，但常用的静电喷涂工艺会产生大量的粉尘，维护成本较高。本文主要研究一种粉末涂料的水性涂装工艺，重点考察了环氧聚酯型粉末涂料在水性涂装过程中不同消泡剂和不同烘烤条件等因素的影响。结果表明：当水粉比为（ 0.65~0.75）∶1，硅油消泡剂添加量为 1.5%的涂料试板于 60 ℃干燥 3 min后以 10 ℃/min升温速率升至 180 ℃，固化 15 min，得到的涂层性能符合 HG/T 2006—2006要求，与静电喷涂效果基本一致。粉末涂料的水性涂装法工艺流程短、设备简单、操作便利、无粉尘污染，是一种环境友好、切实有效的涂装方法。

关键词: 粉末涂料, 消泡剂, 阶梯温度, 固化制度, 水性涂装

Abstract: Powder coatings are used in many fields because of their unique environmental friendly characteristics and excellent coating effect，but the commonly used electrostatic spraying process will produce a large amount of dust and high maintenance costs. In this paper，a study on water-borne coating process of powder coatings was described，and the effects of different defoamers and different baking systems on the epoxy polyester powder coatings were investigated. When the blending ratio of water to powder was（0. 65-0. 75）∶1， the coatings test sample with 1. 5% silicone oil defoamer was dried at 60 ℃ for 3 minutes，then temperature wasrised at 10 ℃/min to 180 ℃ and cured for 15 minutes，which could meet the requirements of HG/T 2006—2006 standard，and the performancewas basically the same as with electrostatic spraying process. The water-based coating method of powder coatings was characterized by its short-time process，simple equipment，convenient operation and no dust pollution. It is an environmentally friendly and effective coating process.

Key words:  powder coating, defoamer, step temperature, curing system, water-based coating

中图分类号: 

• TQ639. 2