Coating AdditivesMedium thickener applications are essential. Thickener is a rheological additive and can thicken the paint. Prevent sagging during construction. It can also impart excellent mechanical properties and storage stability. For low viscosity coating systems. It is a very important type of additive. Nowadays, there are many kinds of thickeners for paint thickeners. It can be roughly divided into four categories. There are four main categories of inorganic thickeners, cellulose thickeners, polyacrylate thickeners and associative polyurethane thickeners.
Polyacrylate thickeners can be divided into two types. A homopolymer or copolymer emulsion thickener of acrylate and methacrylic acid that is acidic in nature. The thickening effect can only be achieved by neutralizing the alkali or ammonia water until the pH value is 8-9. This can also be called acrylic alkali swelling thickener. The other is water-soluble polyacrylate. In recent years, with the continuous improvement and development of polyurethane systems.
There is also a form of thickener in the polyurethane system, which is called associative thickener. ViscoPlus associative thickeners 3000, 3010, 3030, and 3060 are included in DegussaTEGO additives represented by Shanghai Kaiyin Chemical Industry.
Inorganic thickeners expand by absorbing water to form thixotropy Gel minerals. Mainly include bentonite and attapulgite. Aluminum silicate, etc. Among them, wetting soil thickener is the most commonly used.
The most commonly used and longest-standing thickener is cellulose thickener. There are many varieties, including methylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylmethylcellulose, etc. The most commonly used is hydroxyethylcellulose.
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