Overview
Bisphenol AF (BPAF) is a fluorinated organic compound derived from bisphenol A, distinguished by its hexafluoroisopropylidene bridge. Developed as a high-performance alternative to conventional bisphenols, it excels in environments requiring extreme thermal and chemical resistance. Primarily used as a crosslinking agent in fluoroelastomers, BPAF enhances polymer durability in seals, gaskets, and coatings. Its adoption in aerospace, automotive, and semiconductor industries underscores its reliability under harsh conditions.
Physical and Chemical Properties
BPAF exhibits a crystalline structure with a melting point of 160-162°C, ensuring stability in high-temperature applications. Its fluorine content imparts exceptional resistance to solvents, acids, and bases, outperforming non-fluorinated analogues. The compound's low solubility in water but high compatibility with organic solvents like acetone facilitates its integration into polymer matrices. Its dielectric properties also make it suitable for electronic encapsulants.
Main Applications
BPAF is critical in synthesizing fluoroelastomers (e.g., Viton®), where it acts as a curing agent to improve elasticity and heat resistance (up to 250°C). These elastomers are used in fuel systems, O-rings, and industrial hoses. Additionally, BPAF serves in polyimide resins for flexible printed circuits and as a monomer in specialty adhesives for aerospace components. Its inertness to UV radiation expands its use in outdoor coatings.
Safety and Storage
BPAF requires careful handling due to potential endocrine-disrupting effects. Use nitrile gloves and respirators to minimize exposure. Spills should be contained with inert absorbents. Store in sealed containers under inert gas (e.g., nitrogen) to prevent degradation. Shelf life exceeds 2 years when kept at <25°C with <40% humidity. Dispose per local hazardous waste regulations.
B2B Procurement Guide
When sourcing BPAF, prioritize suppliers with ISO 9001 certification and batch-specific COAs (Certificates of Analysis). Key parameters include purity (≥98%), residual solvent levels (<0.1%), and particle size consistency. Bulk purchases (100+ kg) often reduce costs by 15-20%. Consider regional tariffs; EU imports may require REACH pre-registration. Sample testing for intended applications (e.g., cure rate in elastomers) is recommended.
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