Abstract: Aminoalkyl piperazine (poly) pyrophosphates as effective flame retardants and thermoplastic polymer resins containing such flame retardants. These flame retarded resins are particularly useful in electrical and electronic components, such as casing or coverings for metal wires or cables.

Abstract: There is provided herein a flame retarded polyamide composition comprising: (a) at least one polyamide; (b) a hydroquinone bisdiphenyl phosphate ester of the general formula (I): wherein R1, R2, R3 and R4 each independently is aryl, or arylalkyl each independently containing up to about 30 carbon atoms, optionally interrupted with heteroatoms, X is a divalent hydroquinone group, containing up to about 20 carbon atoms, and n has an average value of from about 1.0 to about 2.0; and, (c) at least one brominated flame retardant and optionally, melamine polyphosphate.

Abstract: There is provided herein a composition containing (A) a phosphorus-containing aromatic polyester of the general formula (I) described herein which has a weight average molecular weight of from 1,000 to 20,000 and which is concurrently a flame retardant O and an active ester curing agent, and, (B) a solvent, such as a solvent commonly used in thermosetting resin formulations and copper-cias laminate preparation.

Abstract: There is provided herein a flame retarded polyamide composition comprising: (a) at least one polyamide; (b) a hydroquinone bisdiphenyl phosphate ester of the general formula (I): wherein R1, R2, R3 and R4 each independently is aryl, or arylalkyl each independently containing up to about 30 carbon atoms, optionally interrupted with heteroatoms, X is a divalent hydroquinone group, containing up to about 20 carbon atoms, and n has an average value of from about 1.0 to about 2.0; and, (c) at least one brominated flame retardant and optionally, melamine polyphosphate.

Abstract: Halogen-free flame retarded unsaturated polyester (UPE) composites are described, where aluminum methyl methylphosphonate (AMMP) was added to a UPE matrix in order to obtain a UL94-V0 formulation. The combustion properties of AMMP are improved to that of aluminum trihydrates (ATH) in cone calorimetry. The use of AMMP prepared with phosphonium catalyst was also shown to be advantageous for retaining the gelation time of the UPE resins in a mold.

Abstract: A flexible polyurethane foam-forming composition and the flexible polyurethane foam obtained therefrom contain, as flame-retardant additive, a halogen-free phosphonate compound which is substantially unreactive for isocyanate, contains at least about 5 weight percent phosphorus, has an acid value of about 2 mg KOH/g or less, a volatility as measured by thermogravimetric analysis not exceeding a 5.0 percent weight loss at a temperature of about 150° C., and a weight average molecular weight of from about 200 to about 2000.

Abstract: A flame retarded thermoplastic polymer composition comprising a thermoplastic polymer and a mixture of metal salts of dialkylphosphinic and monoalkylphosphinic acid providing improved flame retardant performance and better processability compared to a similar composition containing only a salt of dialkylphosphinic acid.

Abstract: An epoxy resin composition comprising an epoxy resin and, as the effective curing agent, an epoxy-reactive polyphosphonate which can be of the formula (I) where “Y” is an arylene and “n” can range from about 2 to about 30.

Abstract: The invention relates to flame retarded polyurethane foam containing, inter alia, an effective flame retarding amount of a non-halogen flame-retardant mixture wherein said foam is capable of meeting or exceeding stringent flame retardancy criteria.

Abstract: A flame retarded thermoplastic polymer composition comprising a thermoplastic polymer and a mixture of metal salts of dialkylphosphinic and monoalkylphosphinic acid providing improved flame retardant performance and better processability compared to a similar composition containing only a salt of dialkylphosphinic acid.

Abstract: A flexible polyurethane foam-forming composition and the flexible polyurethane foam obtained therefrom contain, as flame-retardant additive, a halogen-free phosphonate compound which is substantially unreactive for isocyanate, contains at least about 5 weight percent phosphorus, has an acid value of about 2 mg KOH/g or less, a volatility as measured by thermogravimetric analysis not exceeding a 5.0 percent weight loss at a temperature of about 150° C., and a weight average molecular weight of from about 200 to about 2000.

Abstract: An epoxy resin composition is disclosed that comprises an epoxy resin, a reactive phosphonate curing agent, an inorganic filler, whose presence allows for reduced amounts of phosphonate as compared to a composition not containing the filler, an optional polybenzoxazine resin, and an optional co-curing agent.

Abstract: A composite material comprising reinforcing fiber and an adhesive composition comprising an epoxy resin, optionally a resin curing agent, a curing catalyst and a reactive phosphonate flame retardant and method of preparation thereof.

Abstract: A process is provided for the production of diaryl alkyl phosphonate by the reaction of triaryl phosphate with dialkyl alkyl phosphonate in the presence of alkali metal iodide catalyst; and, optionally, the diaryl alkyl phosphonate is reacted in situ with aromatic diol and, optionally, with at least one branching monomer, in the absence of other or further added catalyst to provide oligomeric and/or polymeric phosphonate products.

Abstract: Flame retarded resin compositions comprise at least one resin selected from the group consisting of polycarbonate, polyester and mixtures thereof, and a flame retarding effective amount of at least one nonhalogenated arylalkylsilyl flame retardant, the flame retarded resin composition being substantially free of haloorganic flame retardant and phosphate flame retardant.

Abstract: An epoxy resin composition comprising an epoxy resin and, as the effective curing agent, an epoxy-reactive polyphosphonate which can be of the formula (I) where “Y” is an arylene and “n” can range from about 2 to about 30.

Abstract: Storing, for a period of time, of a blend comprising an arylene-bridged oligomeric phosphate composition and an effective amount of an alkylene-bridged bisphosphate results in a retardation of crystallization as compared to storage of a composition comprising the arylene-bridged oligomeric phosphate composition without also containing the alkylenebridged bisphosphate.

Abstract: An epoxy resin composition is disclosed that comprises an epoxy resin, a reactive phosphonate curing agent, an inorganic filler, whose presence allows for reduced amounts of phosphonate as compared to a composition not containing the filler, an optional polybenzoxazine resin, and an optional co-curing agent.

Abstract: The hydrolytic stability of a polycarbonate-containing resin composition, which comprises an arylene-bridged oligomeric phosphate flame retardant can be improved by the addition of an effective amount of a neopentylglycol bis(diphenyl phosphate) flame retardant for such hydrolytic stability improvement.

Abstract: Epoxy resins that are suitable for forming epoxy laminates that meet a UL-94 rating of V—O comprise a hydroxy-terminated oligomeric phosphonate comprising the repeating structure —OP(?O)(R)OArylene-, where R is alkyl, as a flame retardant.