DOPO Flame Retardant for Polyester CAS 35948-25-5, Reactive Halogen-Free Phosphorus for PET PBT Fiber & Engineering Plastic
DOPO flame retardant (CAS 35948-25-5), chemical name 9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, is reactive halogen-free organophosphorus crystalline powder. It can be introduced into polyester molecular chain during polycondensation of PET and PBT. The phosphorus structure becomes part of polymer backbone, so flame retardant will not migrate or leach out after molding or fiber spinning. It is widely used for flame retardant PET fiber, PBT engineering plastic, retaining good mechanical
Product DetailsChemical IdentityProduct Name: 9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, DOPO CAS No.: 35948-25-5 Chemical Type: Reactive halogen-free organophosphorus compound Physical Form: White crystalline powder Core Feature: Reactive halogen-free phosphorus for PET PBT fiber and engineering plastic
Key Performance & TDSDOPO reacts during polyester polycondensation and covalently incorporates phosphorus units into PET / PBT polymer chains. It solves the common problem of additive flame retardant blooming and washing-out for textile fibers. It promotes dense char layer formation under flame, suppresses heat transfer and melt dripping of polyester. It features high thermal stability to withstand high-temperature polyester polymerization, spinning and injection molding processes. Halogen-free composition releases low smoke and no corrosive halogen gas upon combustion. It keeps balanced tensile strength and color performance of polyester fiber and PBT engineering plastic. Uniform fine powder facilitates feeding and homogeneous dispersion in polyester production.
Applications
- Reactive flame retardant modification of PET fiber and textile
- Flame retardant PBT engineering plastic for electrical components
- Copolymerized halogen-free flame retardant polyester resin
- Polyester staple fiber and filament production
- High performance flame retardant polyester engineering parts
ComplianceThis product complies with RoHS and REACH standards, suitable for global export polyester fiber and engineering plastic raw material projects.
Why Choose JSYWe supply factory direct DOPO flame retardant for polyester, PET and PBT. Stable phosphorus content, good thermal resistance, flexible MOQ and professional formulation support for polyester and fiber manufacturers.
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