Kinetic Evaluation of 9,10-dihydro-9-oxa-10
In this investigation the flame-retardant effect of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) on an epoxy resin (EP) was studied. The results showed that the peak of heat release rate (PHRR) and total heat release (THR) of EP/DOPO (FREP) with 5phr DOPO during cone calorimeter measurements were only 67.4% and 75.3% of those of
Promotion of the flame retardancy of 9,10-dihydro-9-oxa-10
As a phosphorus flame retardant, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) contains a biphenyl ring structure and a phenanthrene ring structure (Luo, 2017), in particular introducing a side phosphorus group in the form of a cyclic O P O bond, and thus displays better flame retardancy and greater thermal and chemical stability
Highly efficient flame-retardant and transparent epoxy resin
Abstract In this study, a high effective phosphorus-containing flame retardant (DOP-DDM) was synthesized using phenylphosphonic dichloride, p -hydroxybenzaldehyde, 9,10-dihydro-9-oxa-10-phosphaphenan- threne-10-oxide (DOPO) and 4,4′-diaminodiphenyl methane (DDM) as raw materials.
Preliminary ecotoxicity hazard evaluation of DOPO-HQ as a
Recent regulatory and environmental pressures have led to increasing demands for environmentally friendly flame retardants as alternatives to halogenated flame retardants (HFRs). A new flame retardant alternative, 10-(2, 5-dihydroxyl phenyl)-9, 10-dihydro-9-oxa-10- phosphaphenanthrene-10-oxide (DOPO-HQ), was applied due to its high thermal
DOPO‐based curing flame retardant of epoxy composite material
Phosphorus-containing flame retardant (HBAEA-DOPO) for epoxy resin was synthesized by addition reaction of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) with bis[2-(4-hydroxybenzylideneamino)ethyl]amine (HBAEA) that was synthesized via 4-hydroxybenzaldehyde with diethylenetriamine.
- Is Dopo a flame retardant?
- Synthesis of organophosphorus compounds based on 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and its application as flame retardant have created much attention in the flame retardant community. Various chemical reactions and synthetic approaches are followed to develop numerous derivatives of DOPO.
- Is diastereomer a flame retardant?
- Even though, only one set of diastereomers were found according to 13P NMR spectra. Additionally compound 19 was investigated as active flame retardant in combination with 4,4′-diaminodiphenylmethane (DDM) in E51 epoxy resin. With increasing wt% of P-content in the resin, both char yield and LOI values were increased.
- Can disubstituted p -hydroquinone be used as a flame retardant?
- Proposed mechanism for synthesis of disubstituted p -hydroquinone. Compound 2 is a reactive monomer, Owing to the diol functionality. Therefore, it could be incorporated into the molecular backbone of polymers for flame retardant application.
- What is flame retardant used for?
- The flame retardant is widely used in electronic equipment plastic, copper lining pressure layer, circuit boards and other materials. It can also be used to fire retardant treatment for liner polyester, polyamide, epoxy resin, polyurethane and so on. Excellent in heat stability, water resistance, oxidation resistance.
- Is compound 19 a flame retardant?
- Additionally compound 19 was investigated as active flame retardant in combination with 4,4′-diaminodiphenylmethane (DDM) in E51 epoxy resin. With increasing wt% of P-content in the resin, both char yield and LOI values were increased. By varying of P-content increased from 0 to 1.7%, LOI values improved from 24.5 to 33.5%.
- Is upr-8 a flame retardant?
- It was also found that, UPR-8 (with a 20 wt% of 8) has a dual mode of flame retardant action. It produces phosphoric and polyphosphoric acid during the thermal decomposition process which acts as a heat-resistance barrier, as well has a flame inhibition characteristic in gas phase.
