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Activated Molecular Sieve Powder for Coatings

Activated Molecular Sieve Powder for Coatings

2022-07-18

Activated Molecular Sieve Powder is the raw molecular sieve powder after dehydration. It has good dispersibility and fast adsorption speed. It is used in some special adsorption occasions in industry: such as mixing with materials, dispersing and adsorbing into amorphous desiccant, etc. It is an additive or aggregate specifically used in coatings, paints, resins and some adhesives, which can reduce moisture, eliminate bubbles, and improve the uniformity and strength of materials. The product can also be added to the insulating glass composite adhesive strip as a desiccant.

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Reactive two-component coating is a kind of common coating at present, which is usually divided into curing agent component and main agent component. This kind of coating has many varieties and a wide range of applications. It has good mechanical properties and high solid content. It is a kind of coating with great development prospects at present. The most common reactive two-component coating is two-component polyurethane coating, which is generally composed of isocyanate prepolymer and hydroxyl containing resin. Its main application directions include wood coatings, automotive repair coatings, anti-corrosion coatings, floor coatings, electronic coatings, special coatings, polyurethane waterproof coatings, etc.

 


Many reactive two-component coatings can react with trace moisture in the system or environment, which eventually leads to the formation of bubbles and pinholes in the cured film, and may also reduce the gloss of the coating. Therefore, it is very important to remove the moisture in the reactive two-component coating system for its application. Trace water sources in reactive two-component coatings include: trace water contained in raw materials, trace water adsorbed on the surface of pigments and fillers, adsorbed water in the storage process of coatings, and moisture in the construction environment. In order to eliminate the influence of Trace Moisture on the construction quality, it is generally necessary to add water remover to the reactive two-component coating to remove moisture. The physical water remover is mainly molecular sieve. By adding an appropriate amount of molecular sieve activation powder to the reactive two-component coating, the trace moisture in the coating can be removed to ensure the construction quality. At the same time, the molecular sieve activation powder can also play a role in strengthening the coating.


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