Process for the preparation of DOPO-derived compounds and compositions thereof
This invention relates to a process for producing compounds derived from 9,10-Dihydro-9-Oxa-10-Phosphaphenantrene-10-oxide (DOPO). In particular, the invention relates to producing DOPO-derived compounds by reacting DOPO with diol compounds in the presence of a catalyst. This invention also relates to DOPO derived composition containing a high melting point diastereomer. The DOPO derived compounds may be useful as flame-retardants.
1. A composition comprising the high melting point isomer of Formula IIa:
and the low melting point isomers of Formula IIb and IIc having the Formulas:
wherein said composition has an Isomer Ratio of greater than about 0.5 utilizing the 31P NMR method and wherein said Isomer Ratio=A h /(A h +A l ), wherein A h : area of high melting point isomer peak and A l : area of low melting point isomers peak.
2. The composition of claim 1 , having an Isomer Ratio of greater than about 0.8 utilizing the 31P NMR method.
3. The composition of claim 1 , having an Isomer Ratio of greater than about 0.95 utilizing the 31P NMR method.
4. The composition of claim 1 , having an Isomer Ratio of greater than about 0.98 utilizing the 31P NMR method.
5. A flame retardant polymer composition comprising a polymer and the composition of claim 1 .
6. The composition of claim 5 , wherein said polymer is polyolefins, polyesters, polyethers, polyketones, polyamides, polyvinylchlorides, natural and synthetic rubbers, polyurethanes, polystyrenes, poly(meth)acrylates, phenolic resins, polybenzoxazine, polyacetals, polyacrylonitriles, polybutadienes, polystyrenes, polyimides, polyamideimides, polyetherimides, polyphenylsulfides, polyphenylene oxide, polycarbonates, cellulose, cellulose derivatives, cyanate esters, polyphenylene esters, polybutadiene resins, butadiene-styrene resins, butadiene-divinylbenzene-styrene resins, epoxy-modified polybutadiene resins, acrylic or vinyl acetate adhesives, carboxyl-terminated butadiene-acrylonitrile copolymers, phenylene ethers, maleic anhydride-grafted butadiene-styrene copolymers, maleic anhydride-modified 4-methyl-1pentene resins, maleated 1-butene-ethylene copolymers, resins derived from vinylbenzyl ether compounds, epoxy resins or mixtures thereof.
7. The composition of claim 5 , further comprising a melamine polyphosphate.
8. The composition of claim 5 , further comprising silica.
9. The composition of claim 5 , wherein said polymer is polyolefins, polyesters, phenolic resins, polyamides, polyurethanes, polystyrene, epoxy resins or mixtures thereof.