Momentive's Silicone Solutions for Air Conditioning Units

• A comprehensive portfolio of one- and two-part adhesives and sealants for assembly applications on or near sensitive electronic components.
• Potting and encapsulation products with various cure speeds, viscosities and performance capabilities to enhance thermal cycling performance, stress relief, material strength, flame retardancy, long-term heat stability and optical clarity.
• Thermally conductive adhesives, gap fillers, compounds and greases.
• Semiconductor packaging solutions from die attach adhesives and encapsulants to lid seal adhesives.
• Low-ionic resins for finer-line-resolution photoresist solutions.
• Ultra-clear liquid silicone rubber for LEDs in flat-panel displays.

Formulation design approaches and improvements in adhesion allow Momentive’s ECC3011 and ECC3051S conformal coatings to mitigate gas permeability concerns, and help deliver corrosion resistance performance that meets emerging expectations for conformal coating materials in air conditioning and other electronic applications.

Momentive’s ECC3011 and ECC3051S silicone conformal coating materials employ a unique formulation that can help prevent the occurrence of corrosion on vital PCB components and surfaces.

These new materials dispel the commonly held perception that silicones, due to their higher gas permeability, are at a disadvantage in corrosion prevention. In tests performed by Momentive in accordance with IEC standards, Momentive’s new silicone formulations outperformed other conformal coating materials for corrosion prevention, including acrylics, polyurethane, polyolefin and competitor silicone formulations.

• Fast tack-free time.
• Requires no equipment to cure.
• Solvent-free formulation (100% solid content).
• Contains UV indicator for ease in inspection under black light.
• Continuous operating temperature range of -40 ~ 150 °C.
• Salt spray performance tested in accordance with IEC60068-2-52 Severity 5.
• Mixed gas corrosion performance tested in accordance with IEC60068-2-60 Method 4.
• Tested in accordance with IPC-CC-830B / MIL-I-46058C.
• UL certified (E-File E135148): Flame Class V-0, Thermal Index 130°C (outdoor).

Momentive’s dielectric silicones for encapsulation and component bonding are used to selectively protect electronic components from moisture and harmful contaminants and to provide structural integrity to electronic parts. These materials provide stress relief protection to circuits from thermal, vibration, and mechanical stress. Momentive offers a range of materials including one and two part products and specialized grades that provide thermal conductivity, flame retardancy, and low volatiles.

Typical Applications in Air Conditioners

• Medium viscosity materials for selective thick section encapsulation and electrical isolation of components such as choke coils.
• Paste materials for structural integrity of tall components such as condensers.
• Deep section potting of PCB.