从China供应商批发进口6fda — FOB条款

6fda, chemically known as 4,4'-(Hexafluoroisopropylidene)diphthalic anhydride (C19H6F6O6), is a fluorinated dianhydride monomer supplied by Daken Chemical Limited from Zhengzhou, Henan Province. This white to off-white crystalline powder serves as the critical building block for fluorinated polyimide synthesis, where its hexafluoroisopropylidene bridge imparts exceptional chain rigidity and thermal stability. The compound's molecular architecture, featuring two phthalic anhydride rings linked by a CF3-bearing central carbon, distinguishes it from conventional dianhydrides such as pyromellitic dianhydride (PMDA) or benzophenone tetracarboxylic dianhydride (BTDA). Daken Chemical Limited trades this specialty intermediate in bulk quantities, positioning it for advanced polymer manufacturers requiring monomers with superior dielectric and optical properties.

The material composition centres on the hexafluoroisopropylidene linkage, which reduces interchain packing and charge transfer complex formation compared to hydrocarbon-based dianhydrides. This structural feature yields polyimide films with lower dielectric constants, typically 2.6-2.9 versus 3.4-3.6 for standard PMDA-ODA systems, and improved solubility in common organic solvents. Typical fluorinated polyimides derived from 6fda exhibit glass transition temperatures ranging from 260°C to 320 depending on the diamine co-monomer selected, with thermal decomposition temperatures exceeding 500°C in nitrogen atmosphere. The monomer's fluorinated content also enhances resistance to organic solvents, acids, and moisture uptake, with water absorption typically below 1.5% in cured films. Standard purity grades for electronic applications require sublimation or recrystallisation to achieve fluorinated dianhydride content above 99.5% with controlled residual solvent levels.

Primary applications span aerospace thermal insulation, flexible printed circuit substrates, optical waveguides, and gas separation membranes where transparency in the visible to near-infrared spectrum is essential. Semiconductor packaging manufacturers utilise 6fda-based polyimides as stress buffer coatings and alpha-particle barriers. The product addresses buyers in advanced materials manufacturing, electronics contract fabrication, and specialty polymer compounding. Trade terms, minimum order quantities, and lead times for this Henan-origin material should be confirmed directly with Daken Chemical Limited, as the listing does not specify these parameters. Standard packaging for moisture-sensitive dianhydrides typically involves nitrogen-flushed aluminium laminate bags with desiccant, though the supplier's exact configuration requires verification.

Daken Chemical Limited maintains its registered address at No.56 Hongzhuan Road, Jinshui District, Zhengzhou, Henan Province, 450000, China. The supplier holds a harbor trust tier classification within the marketplace verification system, indicating a baseline level of profile validation. The listing presents a response rate of 0.00% and zero average response hours, which signals that prospective buyers should anticipate delayed or potentially absent communication and should plan sourcing timelines accordingly. No workforce scale, annual revenue figures, or year of establishment appears in the available profile data.

The company's product focus centres on specialty fluorinated chemical intermediates for high-performance polymer applications, specifically the 6fda dianhydride monomer for polyimide synthesis. The listing does not disclose manufacturing capacity, in-house analytical capabilities, or third-party quality accreditations such as ISO certification status. Buyers should request certificates of analysis, batch-specific HPLC or GC-MS purity data, and material safety data sheets before placing orders. The absence of stated export experience or documented client references means due diligence on customs documentation capability and hazardous materials shipping compliance for fluorinated aromatic compounds is essential.