In any case, few people in the powder coating industry will consider how powder coating reacts at room temperature, and Zhang Xiaofan's idea is somewhat advanced, even very advanced.

It's not that the time is not enough, or the time is very urgent, but Zhang Xiaofan thinks that now we should consider such a thing, now to start research and development, there is a five or six years, should be able to initially solve some technical difficulties, maybe the powder coating will not react at room temperature, but through some technical means to make the surface of the coated object, because some chemical reactions produce heat to increase the temperature, maybe 40 degrees, maybe 50 degrees, no matter which one, it is not the current technology can achieve.

Thinking of this, Zhang Xiaofan suddenly thought of another thing.

Zhang Xiaofan clapped his hands gently, focusing everyone's attention on himself.

"You also have to pay attention to one of the key points, no matter how you cure, one thing that you have to pay attention to is when the flat paint is cured, because the water content may create some small pores, and you must take this into account.

Some of you may have already thought about it, and I just thought of it, so pay attention to it and add some short-chain substances that can promote gas emissions. ”

Here I have to mention that one of the additives in powder coating is called benzoin.

This is a chemical called diphenylethanolketone, and its main role is to eliminate pinholes in powder coatings.

There is also a kind of defoamer, the main role of the defoamer, which can be understood literally, to eliminate air bubbles on the surface of the coating film.

However, there are many types of defoamers, and the effects are also different, some have strong capabilities, some have small capabilities, and many castings are prone to bubbles, so some defoamers need to be added.

Just like some products developed this time, water needs to be added as a solvent, and there will definitely be various drawbacks when water evaporates, and bubbles may be one of them, so it is very necessary to add a reasonable defoamer.

Like a simple technical problem like eliminating bubbles, Zhang Xiaofan only needs to remind him, many people know how to deal with it, while everyone nodded, Zhang Xiaofan lowered his head and continued to do his own thing.

It is difficult to find an accelerator or catalyst in a short period of time, which can make the powder coating react at room temperature, which is a big problem, but Zhang Xiaofan needs to smooth out his thinking.

The two or three chemicals that can react at room temperature are because they contain functional groups that can react at room temperature, so how to transplant this functional group into the raw materials of powder coating is a big problem.

The most common reaction method for powder coatings is the same for both indoor and outdoor applications.

The more complete the reaction of the powder coating, the longer the molecular chain length in the coating film, the better the adhesion, and the better the various properties.

However, the reaction of this epoxy group and carboxyl group is difficult to carry out at room temperature, and its curing temperature, if no other accelerator is added, needs to reach more than 160 degrees, or even more than 180 degrees.

That's the crux of the matter.

Is there a curing promoter in the world that can make these two groups react at room temperature, as far as Zhang Xiaofan's chemical knowledge is concerned, it is difficult to find at present, or even absolutely impossible to find.

The first method is very difficult, but the second method is also unattainable.

The second method is to change the end functional group of the polyester resin, and then change the functional group of the curing agent at the same time, so that when the two are added to the curing accelerator, they can react at room temperature.

Thinking of this, Zhang Xiaofan suddenly felt a little numb in his scalp.

Powder coatings are widely used because of their environmental performance, and they are also the best coating products to replace paint.

However, at this stage, the equipment for manufacturing powder coatings, the extrusion temperature generally has to reach more than 90 degrees, if the curing accelerator is used, the powder coating can be reacted at room temperature, so now the question is, how to reach the temperature of the coating extruder to 90 degrees, no matter which kind of curing accelerator, whether you are added internally or externally, it must prove that the conditions for the reaction of this powder coating will not be very harsh.

In other words, even if this powder coating has been reacted during the production process, is there any point in coating?

The best reaction of the coating is that it will not react when the finished product is produced, and then encapsulated, in the process of spraying, these coatings will slowly react on the coated object, and when a certain amount of time is reached, the coating adheres to the coated object to form a protective film.

If there are signs of reaction in the production process, or in the transportation process, or in the storage process, then the paint is not qualified, because once the paint is reactive and you apply it, the coating film does not have any adhesion.

Zhang Xiaofan has been thinking about this matter for several days, and other technicians have completed the tasks assigned by Zhang Xiaofan step by step through their previous thoughts and learning.

However, Zhang Xiaofan's knowledge system makes some of its thinking often fall into a dead end, in fact, Zhang Xiaofan also knows that he is thinking about these things, there must have been a lot of technical personnel who have thought about it, some of these technical personnel are not necessarily stronger than Zhang Xiaofan, but most of the technical personnel who can develop really promising new products, their professional knowledge should be richer than Zhang Xiaofan.

Therefore, Zhang Xiaofan feels that he only needs to start a start, and leave other things to those doctors and masters in the company to solve, because their professional knowledge is definitely richer than what he likes.

How to change the functional group structure of the molecule? How to find a curing accelerator that can make these coating products react at room temperature, like these basic chemical knowledge or high-end chemical knowledge, Zhang Xiaofan is not a little bit compared with the doctor and master.

There are some things that you need to be self-aware, but Xiao Fang's current achievements are not because he is really skilled, but because he is very lucky, he has obtained a series of formulas, as well as a series of technical knowledge related to coatings.

But his technical knowledge does not include anything that can make powder coatings react at room temperature. You have to find the latest chapters by yourself to read books?