Classification of matting agents and gloss for powder coatings
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Classification of matting agents and gloss for powder coatings

Views: 0     Author: Site Editor     Publish Time: 2023-04-23      Origin: Site


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Classification of matting agents and gloss for powder coatings

Powder coatings can be matted by the following methods: filler method, incompatible material precipitation method, powder dry mixing method, mixed resin or curing agent method, and network cross-penetration method. The above method can not meet the extinction requirements, or the extinction effect is unstable, or increase the production process, so the practical application is not common. And the current series of extinction additives can use the existing production equipment and production process, easy to achieve the extinction effect, so it can be widely used.

According to the extinction mechanism, the matting agent can be divided into the physical matting agent and chemical matting agent; From the adding way can be divided into: before adding (adding when mixing) and after mixing (adding into the finished powder) two kinds; From the application of powder system to distinguish can be divided into: E/P and pure polyester type two. The typical epoxy chemical matting agent is B68 and the polyester type is acrylic resin 631.

So far, it is difficult for physical matting agents to reduce the gloss below 10 degrees, while chemical matting agents can easily meet the matting requirements. The disadvantage of chemical matting agents is the high cost, and some varieties of yellow are not suitable for light powder. The physical matting agent is not easy to yellowing, the powder cost is low, the disadvantage is that the storage stability is not very good, and the resin also has a certain selectivity. Hubei Lais Company E/P system and pure polyester system of physical and chemical matting agent supply can meet the different needs of customers.

The technical department of Anhui Jingcheng New Materials Co., Ltd. has defined the gloss of powder coating according to the following classification methods in the process of application and development of powder coating for many years.

1- No light: The gloss is below 10 degrees, which can be regarded as no light.

1-3- Matte: A finish between 10 and 30 degrees is called matte.

3-7- half-light: glossiness between 30 and 70 degrees, called half-light.

7-9- Luminous: Luster between 70 and 90, called luminous.

9- Shine above 90, called highlights. The previous definition of gloss was 85.

In practice, the difference between 3 and 5 degrees of gloss is not important. The important thing is the physicochemical properties of the film.

There are many factors that affect gloss, do matting powder: 1, the selectivity of resin; 2. Choose an extruder with a slightly poor mixing effect; 3, extrusion temperature control; 4, baking temperature control.

Kingcham is the leading global supplier of innovative powder coating additive companies that combine R&D, manufacturing, sales, and service.








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