Customer question
Water-based coatings are usually configured with acrylic emulsions, silicone-acrylate emulsions, etc., with film-forming agents, wetting agents, thickeners, leveling agents, defoamers, etc. added. Due to the formulation and production process, water-based coatings are prone to foaming, and when encountering foam problems, water-based silicone defoamers can be added for defoaming. This article is a defoaming solution provided by Nanhui defoamer manufacturer for a Thai customer who is doing water-based coatings.
When the water-based paint is configured, in order to ensure its good gloss, color development, film forming, weather resistance, water resistance, and stability, various additives need to be added during the configuration process to enhance the water-based paint performance.
However, the addition of additives also caused the problem of easy foaming of water-based coatings. The main reason is that many additives are surfactants. During the production and stirring process, it is easy to cause foaming, and this type of active agent foams The stability is not easy to eliminate by yourself. If the foam is not treated in time, it is easy to bring a lot of negative effects on the production of coatings. Therefore, it is necessary to use a water-based coating defoamer to control the foam.
(Picture: Paint blistering problems encountered by customers)
In June 2019, a water-based paint manufacturer in Thailand encountered paint production problems. During the paint configuration process, a lot of foam appeared, resulting in uneven filling of the water-based paint, dissatisfaction with the filling, and foam It also affects the use of water-based paint after the can is opened, resulting in shrinkage surface defects. The person in charge, Mr. Tang, contacted the Nanhui defoaming agent manufacturer via the Internet, hoping that Nanhui could provide a defoaming agent for defoaming as soon as possible. The defoaming effect will be good, will not affect the use of the coating, and will not cause surface defects.
Customer request
- The amount of addition is small, and it has a good cost performance;
- The defoaming effect is good, which can solve the foam problem of the coating configuration and prevent the foam from affecting the production;
- Strong foam suppression, can inhibit foam regeneration for a long time, defoaming is stable, and can be stored for a long time;
- The defoamer does not affect the use of the coating while defoaming, and the coating construction will not have surface defects such as shrinkage.
(Picture: Customer's requirements for water-based paint defoamers)
Solution
Coatings are more prone to encounter foam problems due to production configuration and process. In response to Mr. Tang’s problem, Nanhui defoamer technology analyzed the causes of foaming in detail. Based on the samples he sent, experiments were conducted and three types of water-based silicone defoamers for water-based coatings were developed. And sent samples for Mr. Tang.
After taking samples, Mr. Tang was more satisfied with the effect of one of the samples. Adding to the water-based paint configuration, the foam can be quickly eliminated, and after standing for a period of time, no foaming occurs again, so in early July, Mr. Tang ordered 2500 kg of water-based silicone defoamer from Nanhui and put it into production.
The water-based silicone defoamer for this water-based paint configured by Nanhui is made up of polyether and dimethyl silicone oil, so it has good defoaming and anti-foaming effects.
After using it, the customer, Mr. Tang, reported that the defoaming effect was good. After adding the Nanhui water-based silicone defoamer configuration, the coating foam problem has been controlled. It is a water-based coating defoamer developed for coatings.
((Picture: Defoamer Sample)
Nanhui is a manufacturer with years of application experience. It has far more defoaming technology than other antifoaming agents in the market. From the above cases, we prove the strength of our Nanhui defoamer. We have a group of excellent defoaming engineers, and an independent laboratory that facilitates defoaming experiments with foams that are difficult for customers to solve. If you want to know more about defoamer products, you can call our hotline: +86 13428601010.
This article is from the manufacturer of Nanhui defoamer (http://www.nhdefoamer.com/), please indicate the source if you need to reprint.
