How to polymerize silicone oil defoamer with organic modified polysiloxane

2020-01-06 15:42:27

It is generally believed that this is the main cause of fabric yellowing or color change of cloth, and the method of acylation and etherification of primary amino group is adopted to produce modified amino silicone oil or add antioxidant in order to reduce its yellowing or color change, but it is at the cost of sacrificing the hand feeling of finished fabric. In fact, the above methods can not completely eliminate the color change of finished fabric. As we know, when the dyed fabric is shaped at high temperature, the dye molecule activity intensifies, and some dyes that are not firmly bound will be separated from the fiber heat transfer or sublimation. If the dye is not blocked when it diffuses to the outer layer (including the fabric surface and air), the color after the fabric will mainly reflect the color light of the surface dye; if it is blocked (silicone oil film formation), the dyes that have heat transfer will Concentrated on the surface of the fabric.

The color of the fabric is more complex. On the one hand, the dye concentration on the surface increases. On the other hand, because the silicon oil film changes the refractive index of the light, and the amino group is oxidized at high temperature, the color of the fabric will become darker and darker. In order to reduce the color change of fabric caused by dye heat transfer, it is envisaged that the dye will penetrate into the fiber and be blocked by the cross-linked silicone oil film before sublimation and transfer, so that the setting baking temperature can be properly reduced, and the color change caused by amino oxidation at higher temperature can be effectively avoided. Based on this, the activator at is self-made.

In recent years, the printing industry has developed rapidly. Plastic presses have become an indispensable machine in printing industry. However, in the process of plastic printing, bubbles are constantly produced, and the quality of plastic products can not meet the requirements. Therefore, solving bubbles is an indispensable step. Here is a brief introduction to the characteristics of this defoamer.

Silicone oil defoamer is a kind of organic modified polysiloxane polymerized by complex process. It has excellent antifoaming, defoaming and defoaming effect, and it is very fast. It is especially suitable for defoaming and defoaming of oil-based coating, ink and plastic system. Here are the features of the product:

1. Very low surface tension.

2. It has the functions of foam suppression, defoaming and defoaming, especially for the system with high viscosity.

3. It can prevent shrinkage and has excellent effect on improving the luster of paint film.

4. Improve the adhesion resistance, increase the surface smoothness, so as to improve the scratch resistance and wear resistance of the paint film.

5. It can effectively inhibit and eliminate the bubbles and micro bubbles produced in the manufacture and construction of the coating.