Water-based unstable foam wetting agents are a type of additive that can effectively reduce surface tension and improve wetting performance in water-based systems, while not stabilizing foam (even having a certain defoaming auxiliary effect). They have a wide range of applications, mainly concentrated in water-based systems that require high wetting effects and need to avoid foaming problems. The following are its core application areas and specific scenarios:

1. Paint and ink industry

This is the main application area of water-based unstable foam wetting agents, because paints and inks have extremely high requirements for the balance of wetting and defoaming during production and construction.

Water-based industrial coatings: such as steel structure coatings, automotive coatings, engineering machinery coatings, etc. This type of coating needs to wet low-surface energy substrates such as metals and plastics, while avoiding defects such as pinholes and shrinkage holes in the coating film caused by foam generated by stirring and spraying. Unstable foam wetting agents can improve the wettability of pigments (such as titanium dioxide, carbon black) and substrates without exacerbating foam problems.

Water-based architectural coatings: including exterior wall latex paints, interior wall coatings, waterproof coatings, etc. When painting porous substrates such as concrete and masonry, it is necessary to wet quickly to avoid "roller marks" or "brush marks", and to prevent the coating surface from being rough due to residual foam.

Water-based ink: Suitable for packaging printing (such as food packaging, plastic film printing), paper printing, etc. It is necessary to wet the pigment particles in the ink and the substrate (such as PE film, PET film) to ensure that the printed pattern is clear and firmly attached, and to avoid printing leakage and missing dots caused by foam.

2. Adhesive and sealant industry

In the preparation and application of water-based adhesives (such as white latex, hot melt adhesive emulsion, pressure-sensitive adhesive) and sealants, it is necessary to wet the surface of the adherend (such as wood, paper, plastic, fabric) to enhance the bonding force, and at the same time, it is necessary to avoid foam affecting the density and strength of the adhesive layer.

For example, in water-based wood adhesives, unstable foam wetting agents can help the glue quickly penetrate the wood texture, improve the bonding strength, and will not cause gaps in the glue layer due to foam; in water-based sealants (such as glass glue and stone sealants), it can ensure that the glue is in full contact with the substrate to avoid poor sealing caused by foam.

3. Leather and Textile Industry

Leather processing: In the process of water-based finishing (such as top coating and bottom filling) and tanning of leather, the leather surface and fibers need to be moistened to make the finishing agent and dye adhere evenly. Unstable foam wetting agents can avoid uneven finishing and different color depths caused by foam, and at the same time improve the feel and gloss of the leather.

Textile printing and dyeing: used in the application process of water-based dyes and finishing agents (such as softeners and waterproofing agents), helping the agent to quickly wet the fiber (such as cotton, polyester, nylon), ensuring uniform dyeing and consistent finishing effects, and reducing fabric wrinkles or dyeing defects caused by foam accumulation in the dye vat.

4. Pesticide and fertilizer industry (water-based preparations)

Water-based pesticide preparations: such as suspensions, emulsions in water, microemulsions, etc. Pesticides need to wet crop leaves, pest surfaces or soil surfaces to improve their efficacy (such as leaf attachment of herbicides and penetration of insecticides). Unstable foam wetting agents can enhance the spreadability of the liquid medicine (reduce "droplet roll-off"), while avoiding the waste of medicine or uneven spraying caused by foam generated by stirring and spraying.

Water-soluble fertilizers: In liquid fertilizers and foliar fertilizers, they help the fertilizer solution to quickly wet crop leaves or soil, promote nutrient absorption, and avoid foam affecting the normal operation of fertilization equipment (such as blockage of drip irrigation systems).

5. Other fields

Cosmetics and personal care: Some water-based cosmetics (such as lotions, creams, and shampoos) need to wet the skin, hair, or raw material particles (such as powders, active ingredients), and at the same time, foam needs to be controlled (such as some low-foaming skin care products). Unstable foam wetting agents can assist in the dispersion of raw materials, improve the smoothness of product application, and do not add unnecessary foam.

Ceramic and glass processing: In water-based ceramic glazes and glass cleaning agents, they help glazes wet ceramic bodies and cleaning agents wet glass surfaces to avoid glaze defects or incomplete cleaning caused by foam.

Summary

The core value of water-based unstable foam wetting agents lies in the balance between "wetting enhancement" and "defoaming compatibility", so their application scenarios have two commonalities: 

one is that the system is water-based (water is used as the dispersion medium), and the other is that the wetting problem needs to be solved and is sensitive to foam (foam will directly affect product performance or appearance). With the advancement of the water-based trend in various industries (such as environmental protection policies restricting solvent-based products), its application scope is still expanding.