Flame Retardant Dopo CAS No. 35948-25-5 - China Pd-3710 and Dopo
Non-Halogen reactive flame retardants for Epoxy resins, which can be used in PCB and semiconductor encapsulation, Anti-yellowing agent of compound process for ABS,PS,PP,Epoxy resin and others.Intermediate of flame retardant and other chemicals. Package and Storage 1.25 Kg/bag 2.Store in cool, dry places and keep away from fire and moisture. *
Flame retardant effect and mechanism of a novel DOPO based tetrazole
A novel highly efficient flame retardant with phosphaphenanthrene group and tetrazole ring, 6-(((1H-tetrazol-5-yl)amino)(4-hydroxyphenyl)methyl)dibenzo[c,e][1,2]oxaphosphinine 6-oxide (ATZ), was synthesized and incorporated into epoxy matrix as co-curing agent to remarkably improve the flame retardancy of epoxy resin.
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- What are reactive Dopo based flame retardants for epoxy resins?
- This review focuses on recent advances in reactive DOPO–based flame retardants for epoxy resins, including reactive monomers, curing agents and hybrid structures. There are also highlighted fire retardant mechanisms of the DOPO derivatives and thermal and mechanical features of the epoxy systems.
- Is Dopo a flame retardant?
- DOPO contains a reactive hydrogen bond which reacts easily with epoxy resins, aldehydes, acrylates, activated double bonds of benzoquinone, making it either a good flame retardant additive precursor or an integrative flame retardant . Hence, hydrogen phosphinates or phosphonates may be attached directly to an epoxy resin.
- What are flame retardants used for epoxy resins?
- In the market, the most common flame retardants for epoxy resins are based on halogen- , nitrogen , phosphorus and metal-containing compounds . The decomposition of halogen-based flame retardants produces toxic dioxin and other pollutants .
- Are epoxy resins flammable?
- Unfortunately, epoxy resins have the disadvantage of being highly flammable and thus require suitable modifications with reactive or non-reactive flame retardant additives. Recent literature have shown that the derivatives 9,10–dihydro–9–oxa–10–phosphaphenanthrene–10–oxide (DOPO) are the most researched flame retardants for epoxy resins.
- Are phosphorous oxidation states a flame retardant for epoxy resins?
- In conclusion, three kinds of DOPO-based derivatives with multiple phosphorous oxidation states were synthesized and applied as flame retardants for epoxy resins. FTIR and NMR spectra confirmed the successful synthesis of these DOPO-based derivatives.
- What is a reactive flame retardant (BPD) for epoxy resin?
- Huo et al. synthesized a reactive flame retardant (BPD) for epoxy resin (EP) through a 1–pot reaction (Fig. 7). BPD contained phosphorus, nitrogen and sulfur and was used as co–curing agent for DGEBA together with DDM (Table 2). Fig. 7. Synthesis of BPD (yield 85 %) . Table 2. Composition of the cured EP systems .
