Water-based paint defoamers are added in time to prevent fish-eye defects caused by foam.
Paint is a common protective material in life. It not only brings us a visual aesthetic experience, but also protects the solidity of the object being painted. Water-based paints are prone to foam due to mixing, equipment, added additives, raw materials, etc. If these foams are not treated, it will have an impact on the quality, appearance, cost, and canning of the product. Manufacturers are producing or using How to solve the foam problem when using water-based paint?
【1】Causes of water-based paint blistering
1. There are many surfactants and other additives in the paint. These surfactants are prone to liquid foaming in water;
2. During the production process of paint, air will be involved to form bubbles. Certain raw materials in the paint, such as surfactants, dispersants, etc., will stabilize the bubbles;
3. Bubbles will also be produced during the construction process of the paint, which mainly depends on the construction method of the paint. For example, curtain coating can continuously entrain air into the paint, and airless spraying can also easily entrain air. Spraying under relatively low humidity conditions or under high temperature conditions can easily generate bubbles.
【2】Hazards of water-based paint foam.
1. Foam limits the stirring speed, prolongs the blending time, and prevents fillers and dyes from being fully moistened;
2. Foam is generated during the mixing and mixing process with other surfactants, causing volume expansion and reducing the utilization rate of the blending equipment;
3. During the use of paint, foam will cause surface defects, such as pits on the coating film. That is, the bubbles will not burst until the paint dries and forms a film, causing small holes or fish eyes to appear on the coating film.
[3] Defoaming solutions for water-based paints
If water-based paint foam is not processed in time, it will affect the production process on the one hand, and it will also easily cause defects such as shrinkage holes and fish eyes after use. To solve the problem of water-based paint foam, water-based paint defoamer can be used.
Defoaming manufacturers have developed water-based paint defoamer to solve the problem of paint foam. The water-based paint defoamer is a compound product of organic polyether ester, mineral oil, and alcohol, which is refined through advanced special technology. It has special effects on water-based paint systems. It has good compatibility with paint systems and can be used in a wide pH range.
Features of water-based paint defoamer:
1. Small amount of addition: The amount of addition is small, only one thousandth to three thousandths of the paint system. The specific amount of addition is adjusted according to the formula and environment;
2. Widely used: It can be used for defoaming in various paints, coatings, inks, various emulsion synthesis, rubber industrial polymerization, condensation degassing process, polymer glue, styrene-acrylic emulsion, emulsion polymerization, etc.;
3. Easy to operate: It is easy to use and operate. It can not only quickly eliminate foam produced by the paint coating system during production, construction and packaging, but also has a good effect on inhibiting the recurrence of foam, and can also improve the paint adhesion. Improve the bonding degree of the coating and increase the gloss of the paint surface.
Water-based paint defoamers require less addition, are widely used, and are easy to operate. It can help manufacturers control the cost of addition, while also solving the problem of paint foam.
