Recent advances in flame retardant epoxy systems from reactive DOPO
The future research in DOPO–based flame retardants will be oriented towards: (i) sustainable synthetic pathways and the obtaining of bio–based flame retardants from raw renewable resources and (ii) investigating the synergism of phosphorus with the phosphorus atom from DOPO implied in other various entities (P–P, P–Si, P–B, etc.) and multicomponent arrangements with the main purpose
A phosphorus-containing hyperbranched phthalocyanine flame retardant
The flame retardant properties of epoxy thermosets were enhanced considerably with the incorporation of DOPO-CuPc. When the addition of DOPO-CuPc was 5 wt%, the LOI value increased to...
Recent advances in flame retardant epoxy systems containing non
Epoxy resins are widely used in the manufacturing of fire safety products in the industry. 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) is a commercially available non-toxic reactive flame retardant and its incorporation improves the fire behavior of epoxy systems by releasing active phosphorus species to the gas phase.
A DOPO-based phosphorus-nitrogen flame retardant bio-based epoxy resin
In this work, a DOPO-based phosphorus-nitrogen flame retardant bio-based epoxy resin from diphenolic acid had been developed. The phosphorus-nitrogen structure is grafted in the epoxy resin main chain, which is different from the direct addition type and co-curing agent type flame retardant system.
An overview of some recent advances in DOPO-derivatives: Chemistry and
These DOPO-derivatives are used as flame retardants mainly in epoxy resins [3], [5], [11], [12], [13], [15], for applications in adhesives, composites, printed wiring boards and others [17]. As some halogenated flame retardants have been found to be toxic, the research on halogen-free flame retardants is gaining more and more importance [18] .
- 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.
- 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 dopamine modified Dopo da for flame retardant thermosetting epoxy resins?
- The flame retardant mechanism of flame retardant was analyzed. DOPO-DA promotes the curing process and improves the mechanical properties. In this work, we synthesized a 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) derivative flame retardant dopamine modified DOPO (DOPO-DA) for flame retardant thermosetting epoxy resins (EP).
- 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.
- 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.
- Which is the best flame retardant for epoxy resin?
- Among them, 9,10-dihydro-9-oxo-10-phosphaphenanthrene-10-oxide (DOPO) has become the most widely studied and most promising flame retardant in the field of flame retardant epoxy resin [31, 32].DOPO and its derivatives can be used as reactive and additive flame retardants in epoxy resins.
