WATER-BASED THICKENER

Rheology additives not only increase the viscosity of the coatings, and improve the storage stability, but also prevent the occurrence of sagging during the construction process, and can also endow the coating film with better mechanical properties. It is a very important additive for waterborne coatings.

There are many kinds of thickeners on the market, which are mainly divided into four categories: Inorganic, Cellulose, Polyacrylates and Associative Polyurethane Thickeners. Among them, Polyurethane Thickener is a newly developed Associative Thickener in recent years.

The associative structure is destroyed under the shearing force, which results in a decrease of viscosity, and when the shearing force disappears, the viscosity recovers, which prevents sagging during construction. The viscosity of coatings has a certain hysteresis in the recovery timing, which is beneficial to the leveling of the coating. The relative molecular weight of polyurethane thickeners (from thousands to ten thousand) is much lower than the Inorganic and Cellulose Thickener (from hundred thousand to millions), which is not conducive to splash resistance. The molecule of polyurethane thickener has both hydrophilic group and hydrophobic group. The hydrophobic group has strong compatibility with the coating base materials and that could enhance the water resistance of the coating.

Advantages

• APEO-free, VOC-free;
• Formed film has a high gloss;
• Excellent hydrophobicity and stable washing durability;
• Good scratch resistance and biological stability

Product