Heatecx Limited
The Thermo-Resistant Inorganic Adhesive 3732 is an innovative, high-performance solution designed for applications demanding extreme thermal stability and robust bonding in high-temperature environments exceeding 400°C. Unlike traditional inorganic adhesives based on silicates or phosphates, which present limitations in water resistance, dielectric insulation, and ease of use, the 3732 is formulated with metal alkoxides as a binder. This waterproof heat sealant is a single-component product that cures at low temperatures and generates minimal foam, greatly simplifying its application and handling. Once cured, the resulting material is 100% inorganic, offering exceptional resistance to oxidation, excellent dielectric rigidity, and superior sealing capability—significantly expanding its range of applications compared to conventional alternatives. It is ideal as a sealant for heating elements and for the protection of cartridge heaters, tubular heaters, immersion heaters, etc., guaranteeing durability and safety.
Adhesive 3732 represents a technological advancement in the field of high-temperature materials. Its unique formulation allows it to be used as a filling material, thick coating, paint, or putty, providing a versatile solution for industry. Its capacity to withstand temperatures of up to 1400°C makes it an indispensable material for insulation in motors and furnaces, as well as for sealing electrical connections exposed to intense heat. This adhesive not only offers protection for boilers and radiators against corrosion and wear but also acts as an effective hydrophobic/water-repellent barrier, protecting components from moisture. Although it is not a polydimethylsiloxane fluid nor a transformer fluid, it shares with these the characteristic of being an inert oil regarding its chemical stability and low volatility under extreme conditions, ensuring consistent performance over time. Its inorganic nature confers inherent non-combustibility, adding an extra layer of safety in critical applications.
The Thermo-Resistant Inorganic Adhesive 3732 is a versatile solution for a wide range of industrial applications requiring resistance to extreme temperatures, insulation, and sealing.
|
Sector/Application |
Specific Uses |
|---|---|
|
Insulation and Electrical Protection |
Sealant for heating elements, protection of cartridge heaters, tubular heaters, immersion heaters, water heating heaters, insulation in motors and furnaces, sealing of electrical connections in high-temperature environments, fixation of electrical/electronic components near heat zones. |
|
High-Temperature Bonding and Filling |
Filling and fixing of ceramics, glass, and metals. Joint filling in high-temperature areas. Fixation and filling in spark plug assembly. |
|
Protective Coatings |
Coating to prevent metal oxidation. Coating to avoid carbon and sludge adhesion. Protective coating in the protection of boilers and radiators. |
|
Manufacturing and Assembly |
Filling, bonding, and coating of sensors and components. Sealing of armored heaters. Use as a thermo-resistant molding material. |
|
Extreme Conditions |
Applications requiring resistance to organic solvents, weathering, and abrasion, in addition to heat resistance. |
The Thermo-Resistant Inorganic Adhesive 3732 offers a set of superior properties that distinguish it from conventional adhesives, providing exceptional performance in demanding environments:
Extreme Temperature Resistance: Capable of withstanding up to 1400°C, guaranteeing structural and functional integrity under the most severe thermal conditions. This extreme thermal stability is fundamental for component durability.
Excellent Electrical Insulation: Provides high dielectric rigidity, crucial for the safety and performance of electric heaters and other electronic components exposed to heat.
Superior Water Resistance: Its hydrophobic/water-repellent property ensures effective protection against moisture, preventing corrosion and material deterioration.
Non-Combustibility: Being a 100% inorganic material once cured, it is inherently non-flammable, increasing safety in high fire-risk applications.
Easy Operation: As a single-component product with low-temperature curing and low foam formation, its application is simple and efficient, improving productivity.
Chemical Resistance: Immune to the action of acids and alkalis, making it suitable for chemically aggressive environments. Additionally, it presents resistance to oxidation and organic solvents.
Effective Sealing: Offers robust sealing capability, ideal for filling voids and joints, creating a durable protective barrier.
Low Volatility: Its inorganic composition ensures low volatility even at elevated temperatures, maintaining its properties over time, similar to an inert oil.
|
Parameter |
Value |
|---|---|
|
Appearance |
White Paste |
|
Main Component |
Aluminum Oxide |
|
Solvent |
Ethanol-based Solvent |
|
Viscosity |
10,000 cP |
|
Specific Gravity |
2.6 |
|
Heat Resistance (Heating Fusion Method) |
1,400°C or Higher |
|
Coefficient of Thermal Expansion |
75 × 10⁻⁷ /°C |
|
Thermal Conductivity |
6.1 × 10⁻³ cal/cm·sec·°C |
|
Rockwell Hardness (0.2kgf) |
200Hv |
|
Flexural Strength |
100 kgf/cm² |
|
Impact Adhesive Strength (Note 1) |
26 kgf/cm² |
|
Volume Resistivity (Room Temp) |
1 × 10¹² Ω·cm |
|
Volume Resistivity (After 5hr Boiling) |
2 × 10¹¹ Ω·cm |
|
Capacitance |
6.0 (1KHz) |
|
Dielectric Dissipation Factor |
4.1 × 10⁻³ (1KHz) |
|
Water Resistance (Water Contact Angle) |
100° |
|
Chemical Resistance: Water (Boiling 2hr) |
◎ (No abnormalities) |
|
Chemical Resistance: 5% HCl (25°C × 24hr) |
◎ (No abnormalities) |
|
Chemical Resistance: 5% NaOH (25°C × 24hr) |
△ (Slight crack, peeling, or discoloration) |
|
Chemical Resistance: Toluene (25°C × 24hr) |
◎ (No abnormalities) |
|
Chemical Resistance: Methanol (25°C × 24hr) |
◎ (No abnormalities) |
Note 1: Force measured by filling a φ10 × 5 mm iron ring with 3732 and a φ4 × 10 mm aluminum shaft, applying pressure to the aluminum shaft, and measuring the extraction force.
Note 2: After coating this product on a stainless steel plate and curing by heating, it is immersed under various conditions to observe for cracks, peeling, or discoloration. ◎: No abnormalities. △: Slight cracks, peeling, or discoloration observed.
The 3732 heater sealant is a single-component sealant with extreme thermal stability (up to 1400°C) designed for the protection of cartridge heaters and the sealing of electrical connections. Follow these key steps for its application:
Preparation: The surface must be completely clean, dry, and free of grease. Degreasing with alcohol or acetone is recommended to ensure dielectric rigidity and adhesion.
Application: Apply directly as a putty or coating. It is ideal as a sealant for heating elements due to its low volatility and bubble-free filling capacity.
Curing: The product cures at low temperature. You can let it dry at room temperature or apply gentle heat to accelerate the formation of the hydrophobic inorganic matrix.
Storage: To preserve its shelf life, keep the container sealed in a cool place (preferably between 0-10°C).
This method guarantees durable dielectric insulation and excellent resistance to oxidation in intense heat environments.
Although the primary function of the Thermo-Resistant Inorganic Adhesive 3732 is bonding and sealing, its aluminum oxide composition and inorganic nature allow it to act as a protective barrier in high-temperature casting and molding processes. It is not a thermal release agent in the traditional sense of a liquid or spray that facilitates the immediate release of parts. Instead, the 3732 is used as a permanent coating that protects the mold or contact surface, preventing the adhesion of carbon, sludge, and other residues at elevated temperatures. This prolongs mold life and reduces the need for frequent cleaning. While not an active release agent, its application indirectly contributes to process efficiency by keeping surfaces clean and protected in extreme heat environments.
