C565

Product Details

CasNo： 9016-00-6

MF： (C2H6OSi)n

Appearance： liquid

Delivery Time： 15 days

Packing： 200kg/drum

Purity： 99%

1. Basic Information

• Product Name: Defoamer
• Brand Model: Silicone Ester 801
• Packaging Specification: 200 kg/ drum (The  drum has good sealing and corrosion resistance, which can effectively protect the defoamer from external environmental influences during storage and transportation, preventing product volatilization, deterioration and leakage)
• Main Ingredient: Silicone paste (It is mainly composed of polysiloxane as the active substance, combined with a variety of additives, and formulated through a special process. It has a unique molecular structure and surface activity, and can efficiently play a defoaming role)

2. Product Characteristics

(1) Physical Properties

• Appearance: Usually a white to slightly yellow paste substance with uniform texture and a certain viscosity, which is convenient for storage and quantitative use.
• Solubility: In non-aqueous systems, it can be diluted and dissolved with aliphatic compounds (such as hexane, heptane), aromatic compounds (such as toluene, xylene), chlorinated hydrocarbons (such as chloroform, carbon tetrachloride), etc.; in aqueous systems, it is miscible with ketones (butanone, methyl isobutyl ketone) and alcohols (tert-butanol, n-dodecanol) to be uniformly dispersed in the system to play a role.
• Melting Point and Boiling Point: As a paste mixture, it has no fixed melting point and boiling point, but can still maintain stable defoaming performance in high temperature environments (up to about 150°C), and will not rapidly decompose or lose activity due to temperature rise.
• Density: Approximately 1.0 - 1.2 g/cm³, which is similar to the density of processing media in most papermaking, chemical, cleaning and other industries, which is conducive to uniform dispersion and mixing.

(2) Chemical and Application Properties

• Efficient and Long-lasting Defoaming: For persistent foam systems, such as long-term stirring of pulp in the papermaking process and continuous production process of chemical distillation, it can quickly and effectively eliminate the generated foam, and inhibit the generation of new foam for a long time, ensuring the continuity and stability of the production process.
• Excellent Alkali Resistance and High Temperature Resistance: It can still maintain good defoaming activity in alkaline environments (pH value can reach about 12), and will not fail due to chemical reaction with alkaline substances; at the same time, in high-temperature working conditions (such as papermaking cooking, chemical high-temperature distillation), it can withstand high temperatures of about 150°C, and the performance does not decrease significantly.
• Low Dosage and High Cost Performance: The addition amount only needs 1 - 100 mg/kg. Compared with similar defoamers, it uses less amount to achieve the same defoaming effect, which greatly reduces production costs and improves the cost performance of the product.
• Chemical Inertness: It has chemical inertness. During the defoaming process, it will not react with other chemical components in the processing medium, nor will it change the original physical and chemical properties of the medium, such as acidity and alkalinity, color, viscosity, etc., ensuring that the quality of the end product is not affected.
• Good Effect on Pulp Treatment: It performs particularly well in pulp treatment in the papermaking industry. It can effectively remove foam in pulp, reduce the interference of foam on fiber dispersion and paper forming, and improve the water filterability of pulp and the quality indicators such as uniformity and strength of paper.

3. Action Principle

• Destroy the Stability of Foam Film: The polysiloxane molecules in the silicone paste can be quickly adsorbed to the gas-liquid interface of the foam, reduce the surface tension of the foam liquid film, make the foam film wall thinner, and reduce the stability. At the same time, its molecular structure can interfere with the orderly arrangement of surfactant molecules in the foam film, destroy the elasticity of the foam film, and cause the foam to break easily.
• Inhibit Foam Regeneration: After defoaming, the residual polysiloxane molecules will form a very thin protective film in the system, occupy the gas-liquid interface position where new foam may be generated, and prevent the aggregation of foaming substances such as surfactants, thereby inhibiting the generation of new foam.

4. Applicable Scenarios

(1) Papermaking Industry

• Cooking Link: In the pulp cooking process, eliminate a large amount of foam generated by the decomposition of organic matter in raw materials such as wood and the reaction of additives, prevent the foam from overflowing and affecting the normal operation of cooking equipment, and improve cooking efficiency and pulp quality.
• Cleaning Link: In the pulp cleaning process, effectively remove the foam generated by cleaning agents and mechanical stirring, ensure that the cleaning solution can fully contact the pulp, improve the cleaning effect and reduce impurity residues.
• Screening Link: During pulp screening, control the generation of foam, avoid the foam interfering with the screening and classification of fibers, ensure the normal operation of screening equipment, and improve the utilization rate of fibers.
• Bleaching Link: In the pulp bleaching process, eliminate the foam generated by the reaction of bleaching agents, prevent the foam from affecting the bleaching effect and the whiteness of paper, and reduce the corrosion of the foam on equipment at the same time.
• Sewage Treatment: In the papermaking sewage treatment process, inhibit the foam generated in aeration and other links, ensure the normal operation of the sewage treatment system, and make the sewage meet the discharge standards.

(2) Cleaning Industry

• Wine Bottle Cleaning: In the wine bottle cleaning process, quickly eliminate the foam generated by cleaning agents and mechanical stirring, avoid the foam clogging the spraying equipment, improve cleaning efficiency, and ensure the cleanliness and quality of wine bottles.
• Circuit Board Cleaning: When cleaning circuit boards, effectively remove the foam generated during ultrasonic cleaning or spray cleaning of the cleaning solution, prevent the foam from damaging the circuit board components, ensure the cleaning effect, and ensure the performance and reliability of the circuit board.

(3) Chemical Industry

• Distillation Link: In the chemical distillation process, inhibit the foam generated by material evaporation and boiling, prevent the foam from entraining materials, ensure the purity and quality of distilled products, and avoid the foam from overflowing the distillation equipment to ensure production safety at the same time.
• Extraction Link: In the extraction operation, eliminate the foam generated by solvent mixing and stirring, improve extraction efficiency, make the target substance better separated and extracted, and ensure the yield and quality of the product.
• Filtration Link: In the chemical filtration process, control the generation of foam, prevent the foam from clogging the filter medium, improve the filtration speed and effect, and ensure the continuity and stability of production.

5. Usage Methods and Precautions

(1) Usage Methods

• Determination of Addition Amount: According to the severity of foam and the nature of the system in specific application scenarios, the optimal addition amount is determined through small sample tests, generally 1 - 100 mg/kg.
• Dilution Operation:
  • Non-aqueous System: Before use, fully stir and mix the silicone ester 801 defoamer with diluents such as aliphatic, aromatic compounds or chlorinated hydrocarbons according to the required ratio, and then slowly add it to the processing system.
  • Aqueous System: Mix the silicone ester 801 defoamer with ketone or alcohol diluents in proportion, stir evenly, and then slowly add it to the aqueous system under stirring to ensure uniform dispersion of the defoamer.
• Addition Timing: During the production process, try to add the defoamer before or just when the foam is generated to achieve the best defoaming effect. Such as in the early stage of pulp stirring in papermaking and the heating stage of chemical distillation.

(2) Precautions

• Storage Conditions: It should be stored in a cool, dry and well-ventilated warehouse, avoiding direct sunlight and high temperature. The storage temperature is recommended to be controlled at 5 - 30°C. During storage, it is necessary to prevent the packaging drum from being damaged to avoid product moisture, pollution and affecting performance.
• Safety Protection: Protective gloves and goggles should be worn during operation to avoid direct contact with skin and eyes. If it accidentally contacts the skin, rinse immediately with plenty of water; if it enters the eyes, rinse immediately with plenty of water and seek medical attention in time.
• Compatibility Taboo: Avoid direct mixing with strong oxidants, strong acids and strong alkalis. Before using it with a new system or chemicals, it is recommended to conduct a small-scale compatibility test first to confirm that there will be no adverse reactions such as precipitation, discoloration and failure.
• Transportation Requirements: During transportation, pay attention to prevent the packaging drum from colliding and squeezing, maintain the tightness of the packaging drum, and avoid product leakage. At the same time, avoid high temperature and humid environments to prevent the product performance from being affected.