Industrial conversion of liquid silicone defoamer
Liquid silicone is typically composed of silicate ester precursors and catalysts. During the reaction process, the precursor of the silicate ester and the catalyst undergo hydrolysis and condensation reactions, generating cross-linked siloxane chains and forming a gel like liquid. Due to various factors, a large amount of foam often appears in the liquid, and liquid silica gel defoamer is used to solve this problem.
The purpose of adding defoamer in silica gel formula is to reduce and control the generation of foam and enhance the surface tension. In the production process of liquid silica gel, due to its special properties, it is often easy to produce a large number of bubbles or foam. These bubbles or foam may have adverse effects on the performance, process and quality of the product, so measures need to be taken to control foam.
The main reasons for adding liquid silicone defoamers include:
1. Inhibition of foam generation: Defoamer can reduce the formation of bubbles during the mixing of liquid silica gel, and destroy the stability of bubbles by reducing the surface tension, thus effectively inhibiting the formation of foam.
2. Promote bubble rupture: Defoamers can form a thin film on the surface of bubbles, changing their surface tension, making it easier for bubbles to rupture and expel gas.
3. Improve product quality: by adding defoamer, foam in liquid silica gel can be reduced, uneven distribution or voids caused by foam can be avoided, and product uniformity and quality can be improved.
4. Improve process effect: In the production process of some liquid silica gel, foam may have a negative impact on fluidity, filling or coating effect. Adding defoamers helps improve flowability and coating performance, enhancing process efficiency.
The selection and use method of silicone defoamers are also crucial. In practical applications, it is necessary to choose the appropriate type and dosage of defoamers based on the characteristics of liquid silicone and the specific production process. A good selection of defoamers will help improve production efficiency, reduce energy consumption, and enhance the overall performance of the product.
