A.S.A.P. Technologies offer a range of Momentive RTV Silicones (formerly GE Silicone) , including SnapSil* brand, with distinct properties that can meet specific needs for automotive, aviation and aerospace, display, consumer and industrial electronics, solar and energy applications. Our RTVs are valued for their electrical and thermal conductivity, heat resistance and adhesion to plastic and metal substrates. They are ideal for a number of industrial sealing and assembly applications that are subject to extreme temperature, ultraviolet light and/or chemical exposure.
Electronic component and frame assembly needs in the Aerospace Industry are served through RTV adhesives, potting, coating, encapsulation and sealing materials that withstand stress and temperature extremes.
RTVs are used extensively in the Electronic and Electric industries to ensure long-term, reliable performance of critical components and electronic circuit assemblies. Silicone adhesives, sealants, conformal coatings, potting gels, encapsulants and thermal management materials play a vital role in many of today’s demanding electronic applications.
Adhesion refers to the bond between two adjacent materials and is related to the force required to affect their complete separation.
Substrate preparation is critical to good preparation good adhesion. Poor substrate preparation can contribute to adhesion problems to remove contamination. Process oils, mold release, dirt, grease, etc. can be done by:
Appropriate solvent cleaning:
Detergent cleaning:
For difficult areas, mechanical roughening may be required. Such processes include:
SS4004P and SS4044P
Helps promote adhesion to: Aluminum, Copper, Steel, Stainless Steel, Brass, Galvanized metals, Porous metals, Unglazed ceramics, Wood
SS4044P is the same as SS4004P but is transparent (for applications where discoloration of the substrate is undesirable) SS4044P – FDA Compliance: 21 CFR 175.105 subject to the conditions and limitations of the regulation.
SS4120
Helps promote adhesion of addition cure RTV’s. For applications where clarity is required. FDA Compliance: 21 CFR 175.105, 21 CFR 175.300 and 21 CFR 177.2600 subject to the conditions and limitations of the regulations. SS4155 General purpose for use with any RTV SS4179 Helps promote adhesion to difficult-to-bond to plastic substrates including: Acrylics, Acrylonitrile-butadiene-styrene (ABS), Cellulosics (cellulose acetate), High-impact Styrene, Thermoplastic resins. Transparent to preserve visibility of colorless products. FDA Compliance: 21 CFR 177.2465 subject to the conditions and limitations of the regulation.
FDA STATUS
The following one-part RTV silicone rubber compounds may be used in repeated contact with foods under FDA regulation 21CFR177.2600 “Rubber Articles Intended for Repeated Use” (and, by reference, 21CFR175.300 “Resins and Polymeric Coatings”).
The Use of these Sealants is Subject to the Following Conditions: The sealant must be applied in accordance with good manufacturing practices at a thickness not to exceed 6mm (1/4”) from an exposed edge, and as a continuous film between joints acting as a functional barrier between the food and the substrate (the area underneath the joint). The sealant must be cured for a minimum of 14 days at 25°C (77°F) and 50% RH. The sealant must be thoroughly cleansed before the first use. The sealant, when properly cured, must comply with the extractives limitations at temperatures up to and including reflux applications. The user should verify compliance with extractives limitations at higher temperatures.
Compliance with 21CFR177.2600 does not authorize use of these sealants for the manufacture of baby bottle nipples. All previously mentioned sealants must be evaluated to determine bond strength for each specific application. If greater adhesion is required, the evaluation of primer
SS4044 (clear) is recommended. SS4044 may be used in repeated contact with food under 21CFR175.105 “Adhesives” and used in conjunction with the RTV products covered under 21CFR177.2600.
As a AS9120B and ISO 9001 certified organization, we continue to strive to deliver the best service and experience in the industry. You, the customer, has always been are focus and we will continue to deliver the best long into the future.
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