352 Defoamer

Product Details

CasNo： 70131-67-8

MF： HO[-Si(CH3)2O-]nH

Appearance： White paste

Delivery Time： 15 days

Packing： 950kg/drum

Purity： 99%

1. Basic Information

• Product Name: 352 Defoamer
• Packaging Specification: 950 kg/white barrel
• Main Ingredient: Silicone paste (polysiloxane compounds), formulated through a special process, with high stability and strong defoaming ability.

2. Product Characteristics

1. Efficient Defoaming and Long - Lasting Foam Suppression:
   • For fully synthetic and semi - synthetic cutting fluid systems, it can quickly eliminate foam generated during the cyclic use of emulsions and grinding fluids, and inhibit foam regeneration caused by mechanical stirring, high temperature or surfactants. In papermaking pulping (bakelite pulp) and oily sealants, it still maintains defoaming activity after dilution without affecting the viscosity and film - forming properties of the system.
2. Broad Applicability and System Compatibility:
   • Suitable for metalworking fluids (cutting, grinding, drilling scenarios), papermaking pulping (especially the cooking and bleaching processes of bakelite pulp) and oily sealants (such as silicone sealants, polyurethane sealants). It is compatible with mineral oil, synthetic ester, surfactants and other components, and does not cause delamination, demulsification or gelling.
3. Low Addition Amount and Economy:
   • Only a small amount of addition (usually 0.05%~0.3% of the total system volume) can achieve the ideal defoaming effect. Compared with traditional mineral oil defoamers, the dosage can be reduced by 30%~50%, reducing production costs.
4. Physical and Chemical Stability:
   • Resistant to high shear (adapting to the high - speed stirring of cutting fluid circulation pumps), temperature (can be used in the environment of - 10℃~150℃) and electrolytes (resistant to hard water and metal ion interference), and still maintains stable performance under extreme working conditions.

3. Application Fields

1. Metalworking Fluids:
   • Fully synthetic cutting fluids: Eliminate foam generated by emulsifiers and extreme pressure additives during high - speed cutting, ensure cooling and lubrication effects, and extend tool life.
   • Semi - synthetic cutting fluids: Control foam overflow during grinding to avoid affecting processing accuracy and workshop environment.
2. Papermaking Pulping:
   • Bakelite pulp production: Add during the pulping cooking, pulp washing and bleaching stages to eliminate foam caused by lignin decomposition and chemical agents, and improve pulp drainability and papermaking quality.
3. Oily Sealants:
   • After dilution, add to silicone, polyurethane and other oily sealants to eliminate bubbles introduced by stirring, ensure the smooth surface of the colloid, and do not affect the bonding strength and sealing performance after curing.

4. Usage Methods

• Addition Amount:
  • Cutting fluids: Add 0.1%~0.3% of the total system volume. When foam is serious, it can be increased to 0.5%.
  • Papermaking pulping: Add 0.05%~0.2% based on the weight of absolutely dry pulp.
  • Oily sealants: Dilute (it is recommended to dilute 10 times with mineral oil) and then add 0.2%~0.4% based on the weight of the rubber compound.
• Addition Method:
  • Direct addition: Cutting fluids can be added directly during the preparation stage or circulation process and stirred evenly.
  • Dilution addition: Papermaking pulping and oily sealants need to be diluted with corresponding solvents (such as water or mineral oil) first and then added slowly to avoid local agglomeration.

5. Storage and Transportation

• Storage Conditions:Store in a cool and dry place at a temperature of 5℃~35℃, avoid direct sunlight and freezing, and keep the package sealed to prevent moisture absorption or volatilization.
• Shelf Life:The shelf life is 24 months in the unopened state, and it is recommended to use up within 6 months after opening.
• Transportation Requirements:It is a non - dangerous goods and can be transported as ordinary goods. During transportation, prevent the packaging barrel from colliding and being inverted, and avoid high - temperature environments.