Redispersible Polymer Powder (RDP)
Redispersible Polymer Powder is the most important binder in cement and gypsum-based drymix mortar. It is a spray-dried powder of high molecular polymer emulsion. After mixing redispersible polymer powder with water for re-emulsification, it has the same properties as the original emulsion, which is a film formed after the water evaporates. This film has high toughness and excellent adhesion to various substrates. At the same time, redispersible polymer powder has good storage stability, and can be stored under normal conditions without adhesion. It can maintain good fluidity, and is conducive to large-scale production in factories.
The performance of redispersible polymer powder in drymix mortar
Redispersible polymer powder complements the advantages of inorganic materials. It can form a film inside the mortar and at the interface of the mortar to increase and improve the bonding strength of the mortar. For example, when used in tile adhesive, it can obtain products with higher pull-out strength by selecting different types and changing the addition amount.
It can improve the flexibility of the mortar, resist the cracking caused by the base layer and the shrinkage of the mortar. For example, when it is used in products such as exterior wall insulation plastering mortar or putty, its impact resistance, flexibility, and cracks reducing can be enhanced by the increase in the amount.
It can improve the abrasion resistance of mortar. For example, when used in self-leveling mortar, it can prevent the removal of surface powder, increase surface strength, and improve abrasion resistance;
It can improve and enhance water resistance. Special grade of redispersible polymer powder can be used in mortars such as waterproofing or leak plugging to form a closed membrane, in order to reduce water penetration and improve water resistance;
Redispersible polymer powder can improve hydrophobicity. For example, special grade of redispersible polymer powder can inhibit efflorescence when used in jointing agents or decorative mortars in order to reduce the precipitation of alkaline substances, prevent vomiting and improve decoration, such as RDP-8513.
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