The New Favourite in Chemical Industry: Polyether Modified Silicon Defoamer
What is polyether modified silicone defoamer
Polyether-modified silica is a major component of antifoam due to its self-emulsifying properties in water. Above the cloud point temperature, the substance loses its solubility in water and exhibits remarkable defoaming properties.
Polyether modified silicone defoamer is widely used in industrial processes that require harsh defoaming conditions, such as high-temperature dyeing of polyester fabrics, desulfurisation systems of aqueous diethanolamine solutions, and defoaming of systems such as seeding oils, cutting fluids, and non-freezing liquids. Especially in the printing industry, photopolymeric resin plate cleaning process, polyether modified silicone antifoam agent can effectively control the foam generated under the action of high shear force, improve cleaning efficiency.
Compared with the general dimethyl silicone oil formulated defoamer, polyether modified silicone antifoam can still maintain its antifoaming effect under the action of prolonged shear, avoiding the foaming problem caused by the decline in defoaming performance, and at the same time, reduce the staining on the plate to ensure product quality.
Properties of polyether-modified silicone defoamer
Polyether modified silicone defoamer combine the advantages of polyether and silicone defoamer to provide more comprehensive defoaming performance.
1、Heat resistance and stability
Polyether-modified silicone defoamer show significant advantages in defoaming operations under extreme conditions due to their excellent heat resistance and mechanical stability. These defoamers can withstand the erosion of acids, alkalis and inorganic salts to ensure efficient performance in harsh environments.
2、Water solubility, high temperature resistance, strong alkali resistance
Methyl silicone oil as a traditional defoamer, with low surface tension, low water solubility and other characteristics, although the defoaming speed, foam inhibition time is long, but in the high temperature and strong alkaline resistance is not enough. At the same time, polyether antifoam agent with its good water solubility and resistance to high temperature and strong alkali performance, to make up for the shortcomings of methyl silicone oil, but the defoaming speed and foam suppression time still have room for improvement.
3、Synergy effect
In recent years, the research and development of polyether-modified polysiloxane has become a hot spot, and the synergistic effect of the two components has been achieved through polyether grafting or block modification. This modification not only improves the defoaming and foam inhibition performance, but also gives the polyether modified silicone antifoam excellent heat resistance, acid and alkali resistance, anti-aging properties.
4、Non toxic and harmless
Polyether modified silica defoamer is safe for the environment and operators, and harmless to strains of bacteria, ensuring the biological safety of industrial applications.
5、High cost performance
Due to its high efficient defoaming performance and very low addition amount, polyether modified silicone defoamer provides a cost-effective choice.
6、Dual base defoaming performance
In the molecule of silicone ether copolymer, the siloxane segment acts as a lipophilic group, and the polyether segment acts as a hydrophilic group, which makes the polyether modified silicone defoamer applicable to both oily and aqueous foaming systems. This design makes the antifoam agent can quickly eliminate foam and provide continuous foam inhibition effect.
7、Special silicone surfactants
Polyether modified silicone defoamer further integrate the advantages of polyether and silicone on the basis of the previous generation of products, and significantly enhance the defoaming and foam inhibition performance by introducing the polyether chain segment into the silicone oil chain segment. As a new type of special organosilicon surfactant, this defoamer retains the properties of silicone oil such as high and low temperature resistance, weather resistance, etc., and at the same time has the non-irritation and high surface activity of polyether.
