Composition analysis of environmental protection latex paint - Shandong chuangyao Biotechnology Co., Ltd

Latex paint is made up of emulsion, pigment, filler, auxiliaries, bactericides and water to determine whether the latex paint is toxic. It mainly depends on whether the raw materials added are poisonous. Shandong chuangyao biotechnology will introduce you to the composition of emulsion paint:

emulsion

First of all, the emulsion is the most important raw material that affects the performance of latex paint. It looks like milk. It is made of some petrochemical raw materials such as vinyl acetate, acrylate, styrene and so on through polymerization chemical reaction in water. Due to the different raw materials and processes, the emulsion produced is also different in performance. Its main function is to bond, water, alkali and light aging resistance.

Some poor architectural coatings, though they are known as latex paints, do not use the above emulsion at all. Instead, they use polyvinyl alcohol, polyvinyl formal and other chemical raw materials, and even starch and other things as binder, especially polyvinyl formal.

Pigment

The second is pigment. Because most of latex paint is white or light color based on white, titanium dioxide and lithopone (lithopone) are mainly used. These two white pigments are harmless to human body, and most color pigments are harmless to human body. But in order to reduce the cost, some manufacturers use lead chrome yellow. Although the amount is small, it will bring bad consequences.

Fillings

Filler, as the name suggests, is to fill, but it is not dispensable. Fillers can enrich the paint film and increase the covering power. Some of them also give the latex paint not easy to precipitate and have good brushing property. The commonly used fillers include calcium carbonate, talc powder, kaolin (porcelain clay), barium sulfate (barite powder), wollastonite powder, etc. These are natural mineral raw materials, which are harmless to human body.

auxiliary

As for the additives, due to the large number of ingredients, we can only choose the important ones from the perspective of environmental protection

Additive: in order to prevent the latex paint from settling in the storage process and not falling when brushing the vertical surface, such additives should be added, which are commonly used cellulose ethers. Hydroxyethyl cellulose produced by Shandong chuangyao biotechnology has good compatibility with solvents, and its properties of mildew resistance, water retention and thickening are higher than those of the same industry. It is the first choice of thickener for many latex paint manufacturers.

Film forming agent: in order to make the emulsion paint film dry and extend the construction season under the condition of low temperature, the general manufacturers add some such additives, such as polyols and their derivatives.

bactericide

In the process of storage, or after drying, the latex paint is polluted by microorganisms everywhere. In addition, with appropriate temperature and humidity, it is easy to cause the paint in the paint barrel to be damaged, demulsification will produce odor, and the film will breed mold, blacken and fall off.

In order to prevent the growth of microorganisms, manufacturers should add some fungicides. At present, there are many varieties to choose. As long as the selection is appropriate and the quantity is correct, it will not cause harm to human body. However, the possibility of adding mercury salt as bactericide in order to reduce the cost is not ruled out.