Classification and Application of Thickener

The amount of coating additives in the coating is very small, but it can give the coating excellent mechanical properties and stable chemical properties, and has become an indispensable component of the coating. Thickener is a kind of paint additives.

It is a very important class of additives for waterborne coatings with low viscosity. The water content is large and the fluidity is relatively large, which requires adding some thickeners to neutralize its viscosity. In addition, latex paint often encounters water separation problems during production, transportation, storage, and construction. Although it can be delayed by increasing the viscosity and dispersion of latex paint, such adjustment effects are often limited and more important. Or throughthickener selection and its use to solve this problem.

Disperse Dyestuff Printing Thickener 

The role of thickener one

Prevent the paint from sagging when painting vertical surfaces. Disperse Dyestuff Printing Thickener is a rheological chemical additive. Its main purpose is to increase the consistency, control the precise characteristics of fluid products, improve fluidity and leveling, and prevent the occurrence of construction. The sagging phenomenon, especially on vertical walls or corners and corners, can be painted very well. The painting is more uniform and the color is fuller, which will not affect the next process. The paint without the paint thickener will flow like water.

The role of thickener two

Stable storage of paint. The thickener for paint has stable chemical properties and can coexist well with various additives of the paint, so it does not appear thinning and delamination, and can prevent the paint from settling. After the paint is added with the paint thickener, the viscosity increases, which can prevent the dispersed particles of the paint from agglomeration and precipitation during storage, thereby achieving more stable storage.

Thickener effect three

Control the fluidity of the paint. The addition of paint thickener can prolong the film-forming time of the paint, reduce the dripping and splashing during roller coating or brushing, so as to achieve the function of leveling the coating film.

Coating thickeners can be divided into two categories according to their types

The non-associative thickener can effectively improve the low-shear viscosity and make the coating system have higher pseudoplasticity. The coating with the non-associative thickener as the main thickener configuration has a higher gel structure. Including: inorganic, cellulose ether, alkali-swelling acrylic thickener;

The associative thickener is a hydrophobic associative water-soluble polymer, generally refers to a water-soluble polymer with a small amount of hydrophobic groups on the hydrophilic macromolecular chain, including: hydrophobically modified alkali-swelled thickener, Non-ionic polyurethane, hydrophobically modified cellulose.

A good thickener should meet the following requirements:

Improve the viscosity of the paint and inhibit the separation of the paint during storage,

Reduce viscosity when painting at high speed,

After painting, increase the viscosity of the coating film and prevent sagging.

Storage of paint thickener

The paint thickener should be stored in an environment with a temperature of 5~40℃, and the storage place should be dry and ventilated. If the product accidentally freezes, it should be thawed in warm water and mixed thoroughly. In addition, the paint thickener should also be stored in the original container, or in other glass, stainless steel, plastic or epoxy resin lined containers, not in low carbon steel, copper or aluminum containers.