Dimethicone defoamer in industrial foam applications
Dimethicones
Dimethicone oil plays an important role in several fields due to its colorless transparency, wide viscosity range, coefficient of expansion and excellent shear resistance. Not only does it have applications in the electromechanical industry and healthcare, but it also plays a key role in products such as sewing thread smoothing agents, defoamers, mold release agents, lubricants and additives.
Dimethicone Antifoam Characteristics
Dimethicone defoamers are finely synthesized products made from fatty alcohols, amides, polyethers and hydrocarbons. Its advantage lies in its ability to quickly penetrate into the liquid and spread rapidly, effectively eliminating stubborn foam and fine foam. Even under strong alkaline or high-temperature environments, the defoaming effect can be maintained stably. Compared with silicone defoamer, dimethicone defoamer will not leave silicon spots on the surface of equipment or products after use, thus avoiding the impact on the appearance.
Dimethicone defoamer combines chemical stability, physiological inertness and excellent high and low temperature performance. Its good water solubility, can be quickly dispersed in the water environment; pH value between 6.5 and 7.8, to ensure the stability of defoaming in extreme conditions; low additive amount, the recommended dosage of 0.001-0.003%, easy to add directly; viscosity and density is appropriate, dimethicone oil viscosity of a wide range (0.65-1,000,000mm ² / s), according to the specific needs of the product can be adjusted. The viscosity and density are suitable.
Advantages of dimethicone defoamer
Dimethyl silicone oil defoamer is a colorless or light yellow liquid with the following characteristics:
1、Heat resistance and cold resistance: it can keep the performance under extreme temperature.
2, viscosity stability: viscosity with the temperature change is small, to ensure the application effect at different temperatures.
3、Water resistance: It is not easy to mix with water, which helps defoaming effect.
4、Low surface tension: It helps defoamer diffuse to the foam surface quickly.
5、Thermal conductivity: It helps defoaming effect under high temperature environment.
6、Light transmittance: the light transmittance is 100%, which does not affect the transparency of the product.
7、High content: low additive quantity, which helps to reduce the production cost.
8, rapid defoaming: rapid elimination of foam, lasting foam suppression, does not produce secondary foam.
9, does not affect the quality of the product: does not change the performance and appearance of the product, no delamination, no oil bleaching, no emulsification, no residue.
10, anti-microbial decomposition: not easy to be decomposed by microorganisms, to maintain long-term stability.
11, chemical stability: easy to store and transport.
Hazard of foam
Foam generation in the industrial process may bring a variety of problems:
1, limited production capacity: in the process of biological fermentation, in order to prevent foam overflow, the feeding coefficient of the equipment has to be reduced, sometimes even less than 30%.
2、Waste of raw materials and products: in paper mills, sugar mills, full filling process, textile mills, oiling process, foam may lead to the loss of raw materials and product overflow.
3, reaction cycle extension: for example, in the wine fermentation process, the presence of foam may lead to overreaction, affecting the product flavor.
4, product quality degradation: in the textile industry, dyeing, printing and water-based coating process, the retention of air bubbles may lead to finished products with spots and blemishes.
5, environmental pollution and safety accidents: foam may lead to environmental pollution and safety accidents, such as an oil refinery in the United States due to residual oil foam overflow triggered a major fire.
Dimethyl silicone oil defoamer application areas
Dimethicone defoamer is widely used in many industries, including but not limited to:
1, ink and coatings: in the production and application process to control foam.
2, PU slurry: to prevent foam generation in the production process.
3、Lubricants: eliminate foam in the production and use of lubricants.
4、Petroleum processing: control foam in the refining process.
5, cleaning and processing: in the industrial cleaning process to prevent foam affecting the cleaning effect.
6, printing and dyeing: in the printing and dyeing process to eliminate foam, to prevent uneven dyeing.
7, sewage treatment: in the sewage treatment process to control foam, improve processing efficiency.
8, papermaking: in the papermaking process to control foam, improve production efficiency.
9、Petroleum industry: control foam in oil extraction and processing.
10, textile industry: control foam in the textile process, improve product quality.
11, synthetic rubber and resin industry: control foam in the synthesis process, improve product performance.
In addition, the multifunctionality of dimethicone oil is also reflected in its use as a vacuum pump oil, solvent and heat transfer medium in petrochemical processes, as well as preservatives and antioxidants in frozen food. These applications further expand the field of application of dimethicone oil, making it an indispensable presence in the cryogenic field.
V-Chem has the advantage of supplying all kinds of silicone products, including: silicone intermediates, basic silicone oils, modified silicone oils, aminosilicone oils, embedded silicone oils, silicone fluids, and other silicone products.
