1. Product Characteristics

The cement defoamer is mainly designed for the foaming characteristics of cement mortar mixing process. The use of ZORANOC cement defoamer ZOC-X66L can effectively control the foam in the cement mortar system and make the concrete components more dense and bright.

2. Special performance

(1) In the cement mortar system, it has good dispersion and rapid defoaming.

(2) Low dosage and high efficiency.

(3) Increase the strength and brightness of concrete components

(4) This product is non-toxic and odorless, which is conducive to production safety.

3. Defoaming mechanism

(1) Foam partial surface tension decreases resulting in foam bursting.

The origin of this mechanism is to spread higher alcohols or vegetable oils onto the foam. When they are dissolved in foam, the surface tension will be significantly reduced. Because these substances are generally less soluble in water, the decrease in surface tension is confined to the local part of the foam, and the surface tension around the foam is almost unchanged. The reduced surface tension is strongly pulled around, extended, and finally cracked.

(2) Defoamers can destroy the elasticity of the membrane and cause bubbles to burst

The addition of defoamer to the foam system will diffuse to the gas-liquid interface, making it difficult for the surfactant with stabilizing foam to recover the elasticity of the membrane.

(3) Defoaming agent can promote the liquid film to drain, and thus cause the bubble to burst

The rate of foam drainage can reflect the stability of foam. Adding a substance that accelerates foam drainage can also play a role in defoaming.

(4) The addition of hydrophobic solid particles can cause bubbles to burst

Hydrophobic solid particles on the surface of bubbles will attract the hydrophobic end of the surfactant, which makes the hydrophobic particles hydrophilic and enter the water phase, thus playing the role of defoaming.

(5) The solubilizing and foaming surfactant can cause the bubble to burst

Some low molecular substances that can be fully mixed with the solution can make the bubble surfactant solubilized and reduce its effective concentration. The low molecular substances such as octanol, ethanol and propyl alcohol can not only reduce the concentration of surfactants in the surface layer, but also dissolve the surfactant adsorption layer to reduce the intermolecular tightness of the surfactant, thus reducing the stability of the foam.

(6) The electrolyte disintegrates the electric double layer of the surfactant and causes the bubble to burst

With the interaction of double layer of foam surfactants, a stable foaming solution can be formed. The addition of ordinary electrolytes can dissolve the double layer of the surfactant to defoaming.

Composition

(1) Active ingredients

Function: breaking and defoaming, reducing surface tension

Representative: silicone oil, polyether, higher alcohol, mineral oil, vegetable oil, etc.

(2) Emulsifier

Function: make active ingredients disperse into small particles, easy to disperse in water, better play the effect of defoaming and inhibiting foam.

Representative: nonylphenol polyoxyethylene ether, soap, Op series, Tween series, span series, etc.

(3) Carrier

Function: it is conducive to the combination of carrier and foaming system, and easy to disperse into foaming system. If the two are combined, its surface tension is low, which is helpful for foam suppression and cost reduction.

Representative: solvents other than water, such as aliphatic hydrocarbons, aromatic hydrocarbons, oxygen-containing solvents, etc

(4) Emulsifying agent

Function: make emulsification effect better.

Representative: dispersant: hydrophobic silica, etc.; tackifier: CMC, polyethylene ether, etc.