Dowsil SE 4450 Thermally Conductive Adhesive​ For Electronics Bonding

Dowsil SE 4450 Thermally Conductive Adhesive​

Product Overview​

Dowsil SE 4450​​ is a ​​1-part, gray, flowable thermally conductive adhesive​​ designed for high-reliability bonding in electronics. Key attributes include:

​​Type​​: Heat-cure silicone elastomer

​​Form​​: Non-slumping liquid with controlled flow

​​Color​​: Gray

​​Thermal Conductivity​​: 1.92 W/m·K (3.322 BTU/hr·ft·°F)

​​Cure Time​​: 30 minutes at 150°C (302°F)

​​Shelf Life​​: 6 months (stored below 4°C)

Product Introduction​​

SE 4450 is engineered to address thermal management challenges in compact, high-power electronic systems. As a ​​solvent-free, addition-cure adhesive​​, it eliminates voids and ensures rapid, uniform heat transfer from components like power supplies, inkjet printheads, and ICs to heat sinks. Its ​​high tensile strength (1060 psi / 7.3 MPa)​​ and ​​elongation (45%)​​ balance structural integrity with flexibility, accommodating thermal cycling and mechanical stress. The one-component formula simplifies processing, while its ​​no-mix application​​ reduces errors in high-volume manufacturing.

Enhanced Properties

Accelerated Curing​​: Achieves full adhesion in 30 minutes at 150°C, enabling faster production cycles.

Low Outgassing​​: Free of solvents and volatile organic compounds (VOCs), ensuring cleanliness in sealed environments.

​​Broad Substrate Compatibility​​: Bonds metals, ceramics, and filled plastics without primers (though surface preparation is recommended).

Electrical Insulation​​: UL 94 V-0 rated for flame retardancy, with a dielectric strength of 575 V/mil (22 kV/mm).

​​Thermal Stability​​: Maintains performance from -45°C to 200°C (-49°F to 392°F), withstanding harsh operating conditions.

Application Scenarios​​

While specific case studies for SE 4450 are proprietary, its attributes align with common industrial uses:

​​Power Electronics​​: Bonding IGBT modules, DC-DC converters, and power transistors in servers and renewable energy systems.

​​Automotive​​: Securing components in EV battery modules and infotainment systems exposed to vibration and temperature extremes.

LED Lighting​​: Thermal coupling of LED chips to substrates to prevent overheating and extend lifespan.

​​Consumer Electronics​​: Repairing or retrofitting heat sinks in laptops, gaming consoles, and wearables.

Shenzhen Huazhisheng New Materials Technology Co., Ltd. is a leading provider of environmentally friendly adhesives and technical solutions, specializing in the application of modified silicone rubber, epoxy adhesives, thermal materials, bonding adhesives, encapsulation adhesives, and UV adhesives across various industries such as electronics, home appliances, LED lighting, automotive, consumer electronics, rail transit, aerospace, and electrical power. Huazhisheng New Materials adheres to the corporate sustainable development strategy of "Progress, Innovation, Professionalism, and Integrity," and integrates the philosophy of "Quality, Efficiency, Environment-Friendly, and Reliability" throughout the entire product lifecycle. Our products have passed SGS, UL, FDA, DIN, and non-toxic certifications, and have been awarded multiple global patents, making us one of the primary suppliers of adhesives and new materials in China's new energy, electronics, automotive, industrial, packaging, environmental protection, construction, and high-speed rail sectors.
With an innovative perspective, we offer customized solutions, continuously develop leading technologies, and provide comprehensive support to clients across various industrial sectors. We are committed to collaborating with our clients to drive industrial transformation and upgrading, ensuring your sustained competitive edge.
Based on advancements in various polymer chemical materials, Huazhisheng New Materials has established a leading position in four key areas: coating, bonding, sealing, and thermal conductivity. Our efficient and environmentally friendly adhesive products and technical solutions help industrial enterprises enhance production efficiency and benefits, protect your electronic products from external chemical agents and harsh usage environments, and extend their lifespan, ensuring continuous and stable operation.