Abstract: A process for producing a three-dimensional article comprising a poly(ester)carbonate compositions characterized by its flame resistance and high impact strength is disclosed. The composition that contains branched aromatic poly(ester)carbonate, a graft polymer wherein the graft base is silicone rubber or silicone-acrylate rubber, talc, phosphorus-containing flameproofing agent, and an inorganic boron compound, and an optional anti-dripping agent satisfies enhanced fire-protection requirements.

Abstract: An intumescing, multi-component epoxide resin coating composition for fire protection with a component (A), which contains at least one epoxide resin and at least one vinyl ester, a curing agent component (B), which contains at least one curing agent for the epoxide resin, and an intumesing component (C), which contains at least one acid constituent, at least one source of carbon and at least one gas-forming agent, components (A) and (B) being kept separate from one another to prevent reaction and reacting with one another with polymerization only while being mixed, as well as the use of this coating composition for providing steel construction elements with a fire protection coating.

Abstract: This invention provides chlorohydrocarbyloxy phosphonate oligomers, organophosphonate oligomers, and processes for the preparation of such oligomers. The chlorohydrocarbyloxy phosphonate oligomers can be represented by the formula (IV) where R1 is a linear or branched hydrocarbylene group or oxygen-containing hydrocarbylene group, which hydrocarbylene group has about two to about twenty carbon atoms, or a hydrocarbylene group having at least one cycloaliphatic or aromatic ring; R2 is an alkyl group or an aromatic group; and n is a number from about 2 to about 20.

Abstract: Clays and organoclays which are treated with resorcinol diphosphate and/or bisphenol diphosphate as general nanoparticle particle dispersants and replacements for quaternary amines. The two compounds are used as self activating and self dispersing nanoparticles by localizing themselves on the particle surface in a polymer matrix and acting as a nanoparticle dispersants in general, as well as resulting in exfoliation of clays. The exfoliate clays may be used in polymers in lieu of other organic treatments.

Abstract: A method for manufacturing a recycled polycarbonate raw material for a flame retardant resin composition from discarded and/or recovered optical discs using a polycarbonate resin as a substrate material, and includes (a) a step to identify if 2,2-bis(4-hydroxyphenyl)propane as a divalent phenol of the polycarbonate resin raw material is polymerized as the sole raw material in the polycarbonate resin as the substrate material of the discarded and/or recovered optical discs and (b) a step to remove impurities by a chemical treatment by separating only the discarded and/or recovered optical discs, wherein the polycarbonate resin is identified as polymerized by using 2,2-bis(4-hydroxyphenyl)propane as the sole raw material.

Abstract: The present invention relates to flame-protected impact-modified polycarbonate compositions, wherein the compositions are free of rubber-free polyalkyl (alkyl)acrylate. The present invention further relates to the use of the polycarbonate compositions in the production of moulded bodies, and to the moulded bodies themselves.

Abstract: A thermoplastic composition contains about 20 to about 90 wt. % of a polycarbonate resin; up to about 35 wt. % of an impact modifier; about 0.5 to about 30 wt. % of a polysiloxane-polycarbonate copolymer; and about 0.5 to about 20 wt. % of a phosphorus-containing flame retardant, each based on the total combined weight of the thermoplastic composition, exclusive of any filler. An article of manufacture having a wall having a thickness of 3 mm or less may be made using the composition, e.g., by molding, extruding, or shaping the above-described composition into an article. Alternatively, an article may be made by ultrasonically welding a first part comprising the foregoing composition a second part.

Abstract: A flame retardant thermoplastic composition comprising a poly(arylene ether), a block copolymer, a liquid polyolefin, and a flame retardant additive composition. The flame retardant additive composition comprises a metal hydroxide, an organic phosphate, and a phosphoric acid salt selected from the group consisting of melamine phosphate, melamine pyrophosphate, melamine orthophosphate, melem polyphosphate, melam polyphosphate, diammonium phosphate, monoammonium phosphate, phosphoric acid amide, melamine polyphosphate, ammonium polyphosphate, polyphosphoric acid amide, and combinations of two or more of the foregoing. The block copolymer comprises a block that is a controlled distribution copolymer having terminal regions that are rich in alkylene units and a center region that is rich in aryl alkylene units. The flame retardant composition may be used in the production of covered conductors.

Abstract: A thermoplastic molding composition characterized by its flame retardance and impact strength is disclosed. The composition contains (A) linear aromatic (co)polycarbonate, (B) a graft (co)polymer having core-shell morphology, the shell containing polymerized alkyl(meth)acrylate and the core containing interpenetrated and inseparable polyorganosiloxane and poly(meth)alkyl acrylate components, (C) a phosphorous-containing flame retardant compound, (D) fluorinated polyolefin and (E) a boron compound, and optionally SAN. The composition is further characterized in that it contains no polyalkylene terephthalate.

Abstract: The molding defect known as “splay” is reduced in poly(arylene ether) injection molding compositions including specific amounts of poly(arylene ether), rubber-modified polystyrene, triaryl phosphate, and aryl phosphite. The molding compositions are particularly useful for injection molding articles with large, thin sections, such as battery cases for the back-up batteries used in wireless towers.

Abstract: The thermoplastic resin composition of the present invention comprises: about 100 parts by weight of a base resin comprising (A) about 5 to about 40% by weight of a rubber modified aromatic vinyl based copolymer resin, (B) about 30 to about 90% by weight of a polycarbonate resin, and (C) about 1 to about 50% by weight of a noncrystalline polyester resin; and (D) about 5 to about 30 parts by weight of an aromatic phosphate ester based compound.

Abstract: The invention relates to a flame retardant composition, wherein a combination of selected flame retardants, particularly potassium perfluorobutane sulphonate, with fluorocarbon or siloxane terminated polycarbonates is present in a polycarbonate substrate. The combination improves the light transparency of polycarbonates.

Abstract: The present disclosure relates to impact-modified polycarbonate compositions which comprise a graft polymer containing silicone/acrylate composite rubber as the graft base, wherein the content of silicone rubber is 65-95 wt. % (based on the graft base), talc having a d98 value (also called “top cut”) of less than 20 ?m and phosphorus-containing flame retardant, the use of the polycarbonate compositions for the production of shaped articles and the shaped articles themselves. The compositions and moulding compositions according to the disclosure have an optimum combination of good flameproofing, good resistance to chemicals and hydrolysis and good mechanical properties (i.e. in particular a high E modulus and high notched impact strength aK).

Abstract: Disclosed herein is a flame retardant thermoplastic resin composition that has superior scratch resistance and mechanical properties, satisfying requirements for the appearance of housing materials resulting from a recent increase in volume of electrical and electronic products, and that contains a phosphorus-based flame-retarding agent, satisfying requirements for fire safety and prevention of environmental problems. The resin composition with scratch resistance comprises a base resin comprising (A) about 30 to about 90 parts by weight of a polycarbonate resin, (B) about 15 to about 50 parts by weight of a polymethylmethacrylate resin and (C) about 5 to about 50 parts by weight of a polyethylene terephthalate-based resin, and (D) about 5 to about 30 parts by weight of a phosphorus-based flame-retarding agent based on 100 parts by weight of the base resin. The composition may further comprise about 1 to about 30 parts by weight of an impact modifier based on 100 parts by weight of the base resin.

Abstract: An object of the present invention is to provide a new granulating process which can recover desired coagulated latex particles with a significantly excellent yield, and can suppress secondary coagulation under the condition having a higher temperature than a softening point of a polymer, without deteriorating the original quality of the polymer itself. A process for producing coagulated latex particles which can suppress the secondary coagulation under the condition having the broad temperature range, without deteriorating the original quality of the polymer itself by spraying or dropping a polymer latex into a gas-phase containing an inorganic salt and/or an acid, and a dispersant in an aerosol form, and dropping or feeding the droplets of the polymer latex into an aqueous phase containing a dispersant.

Abstract: A thermoplastic composition comprises a polycarbonate having repeating structural carbonate units of the formula (1): wherein at least 60 percent of the total number of R1 groups contain aromatic organic groups and the balance thereof are aliphatic, alicyclic, or aromatic groups; and wherein the polycarbonate comprises terminal groups derived from reaction with a cyanophenol of the formula wherein Y is a halogen, C1-3 alkyl group, C1-3 alkoxy group, C7-12 arylalkyl, C7-12 alkylaryl, or nitro group, y is 0 to 4, and c is 1 to 5, provided that y+c is 1 to 5; optionally a branching agent; an impact modifier; and a flame retardant. The compositions are useful in the manufacture of a wide variety of parts, particularly those having a thin wall.

Abstract: The invention relates to an adhesive according to a conventional formulation, comprising additives capable of binding metal ions in the sense of chemical interactions, electrochemical interactions and/or physical interactions.

Abstract: A laminate contains a first layer and a second layer. The first layer contains a first composition that contains polycarbonate, polycarbonate-polysiloxane copolymer, impact modifier and polyetherimide, wherein the polycarbonate constitutes at least about 50% by weight of the composition and a 3.2 millimeter thick, 7.6 centimeter square sample of the first composition produces a smoke density (Ds) of less than 275 after a 4-minute burn, measured according to ASTM E 662-03. The first composition may contain about 50 wt. % to about 97 wt. % polycarbonate, about 0.5 wt. % to about 25 wt. % polycarbonate-polysiloxane copolymer, about 0.5 wt. % to about 20 wt. % impact modifier, and about 2 wt. % to about 15 wt. % polyetherimide, by weight. An article may contain a sheet or film made from such a composition. A laminate or article may be made to include a first layer or sheet that includes such a composition.

Abstract: The present invention relates to a flame retardant polycarbonate thermoplastic resin composition that comprises a polycarbonate resin, a rubber modified vinyl-grafted copolymer, a phosphorous mixture of a cyclic phosphazene oligomer compound and a phosphate ester morpholide compound or a phosphoric acid ester as a flame retardant, and, optionally, a fluorinated polyolefin resin, which has good flame retardancy, heat resistance, mechanical strength, impact strength, heat stability, processability, and appearance.

Abstract: Fine fluoropolymer powders substantially fluorinated surfactant free, in particular fluorinated ionic surfactants, preferably perfluorooctanoic acid or its salts, comprising an anionic polyelectrolyte.

Abstract: The present disclosure pertains to a blend of aromatic polycarbonate and polylactic acid, the method for preparing the same and the use thereof. In the present invention a transesterification catalyst is added during the preparing process with regard to the blend of aromatic polycarbonate and polylactic acid to improve the compatibility of the components in the blend. The blend of aromatic polycarbonate and polylactic acid is provided with the good mechanical properties, thermal processibility and flame retardance properties, and can be widely applied to mechanical product or parts, electronic equipments and/or parts, construction material and/or commodities.

Abstract: Flame retardant compositions that are halogen-free or substantially halogen-free are disclosed. In certain examples, the compositions comprise a polyphenylene ether, a halogen-free or substantially halogen-free polyepoxide, and one or more phosphorated compounds. Prepregs, laminates, molded articles and printed circuit boards using the compositions are also disclosed.

Abstract: A resin composition includes an aliphatic polyester; a second polymer compound other than the aliphatic polyester; and an organic phosphoric acid compound that has a phosphorus content of about 20% by mass or more.

Abstract: A flame retardant composition is provided which contains at least one phosphate ester containing at least one acidic substance resulting from the process of its manufacture, at least one acidity-reducing hydrotalcite and, optionally, at least one acidity-reducing oxetane. The flame retardant composition is especially useful for addition to resins that are susceptible to hydrolytic degradation such as polyesters and polycarbonates, and to resin blends (alloys) containing one or more of such resins, e.g., a blend of polycarbonate and acrylonitrile butadiene-styrene terpolymer.

Abstract: One aspect of the invention relates to a flame retardant thermoplastic resin composition. The invention also relates to a method of making the foregoing composition and an article made from the foregoing composition.

Abstract: The present invention relates to a halogen-free or substantially halogen-free flame-retardant composition comprising a blend of (i) at least one of each highly charring polymer (ii) at least one low volatility phosphate ester, and (iii) at least one compound which splits off a high volatility phosphorus-containing fragment. The invention also relates to a flame retarded thermoplastic composition wherein the flame retardant composition is blended with at least one thermoplastic resin (iv), preferable a polystyrene resin. The invention also relates to a process for manufacturing a flame retardant composition and a thermoplastic composition containing the same.

Abstract: Disclosed is a biodegradable resin composition containing at least one biodegradable organic high molecular compound, a flame retardant additive containing a phosphorus-containing compound, and a hydrolysis suppressing agent suppressing the hydrolysis of the at least one biodegradable organic high molecular compound. An aliphatic polyester resin is polylactic acid, polycaprolactone, polyhydroxy lactic acid, polyhydroxy valeric acid, polyethylene succinate, polybutylene succinate, polybutylene adipate, polymalic acid, polyesters synthesized by fermentation, or a copolymer containing at least one of them. A polysaccharide is cellulose, starch, chitin, chitosan, dextrane, a derivative of at least one of them, or a copolymer containing at least one of them.

Abstract: A process for producing a polymer by polymerizing at least one fluorinated monomer in the presence of a radical initiator and a surfactant in a polymerization medium containing essentially only carbon dioxide. The surfactant is a functional (per)fluoropolyether having recurring units (R1) and at least one functional group containing a heteroatom other than fluorine, the recurring units containing at least one ether linkage in the main chain and at least one fluorine atom. Molded article containing the polymer obtained from the process.

Abstract: The present invention relates to a reinforced thermoplastic resin composition comprising at least an amorphous thermoplastic resin (A), a flame retardant (B), fibrous calcium silicate (C) and an inorganic material (D) comprising talc and/or mica, the content of flame retardant (B) being 0.01 to 30 parts by weight based on 100 parts by weight of the amorphous thermoplastic resin (A); the content of fibrous calcium silicate (C) in said composition being 3 to 30% by weight, and the content of the inorganic material (D) comprising talc, mica or mixture thereof in said composition being 3 to 30% by weight.

Abstract: A thermoplastic molding composition characterized by its flame retardance and impact strength is disclosed. The composition contains (A) linear aromatic (co)polycarbonate, (B) a graft (co)polymer having a grafted phase containing the polymerization product of at least one vinyl monomer and a substrate in particulate form that contains crosslinked member selected from the group consisting of (i) rubber containing interpenetrated and inseparable silicone and poly(meth)alkyl acrylate components and (ii) silicone rubber, (C) a phosphorous-containing flame retardant compound, (D) fluorinated polyolefin. The composition containing neither polyalkylene terephthalate nor boron compounds.

Abstract: There is provided a resin composition (I) exhibiting a less coloration which is excellent in transparency as well as hydrolysis resistance and chemical resistance. Also, there is provided a resin composition (II) exhibiting excellent transparency, hue, fluidity, impact resistance, wet-heat resistance and retention heat stability in a well-balanced condition. The present invention relates to a resin composition (I) comprising 100 parts by weight of a mixture comprising (A) 1 to 99 parts by weight of an aromatic polycarbonate resin and (B) 1 to 99 parts by weight of an alicyclic polyester resin; and (C) 0.001 to 5 parts by weight of a specific organic phosphoric ester metal salt, and a resin composition (II) comprising 100 parts by weight of a mixture comprising (A) 1 to 99 parts by weight of an aromatic polycarbonate resin and (B) 1 to 99 parts by weight of an alicyclic polyester resin; (C) 0.001 to 5 parts by weight of a specific organic phosphoric ester metal salt; and (D) 0.

Abstract: The invention relates to a flame retardant polycarbonate composition which is comprised of a polycarbonate, a phosphoric acid ester, a functionalized acrylic polymer, and an alkyl methacrylate-diene-vinyl aromatic terpolymer, wherein the polycarbonate is present in the composition in an amount of at least about 85 weight percent, wherein the phosphoric acid ester is present at a level which is within the range of about 1 weight percent to about 12 weight percent, wherein the functionalized acrylic polymer is present at a level which is within the range of about 0.5 weight percent to about 4.5 weight percent, and wherein the alkyl methacrylate-diene-vinyl aromatic terpolymer is present at a level which is within the range of about 0.5 weight percent to about 4.5 weight percent, with the proviso that the sum of the amount of the functionalized acrylic polymer and the alkyl methacrylate-diene-vinyl aromatic terpolymer present in the composition does not total more than 5 weight percent.

Abstract: A flame retardant poly(arylene ether) composition is described. In addition to the poly(arylene ether), the composition includes a polyolefin component, and a flame retardant composition that includes a metal dialkyl phosphinate, a nitrogen-containing flame retardant, and a liquid triaryl phosphate. The polyolefin component can be a polyolefin polymer and/or the polyolefin block of a poly(alkenyl aromatic)-polyolefin block copolymer. The composition is particularly suitable as a replacement for poly(vinyl chloride) in insulation for wire and cable.

Abstract: The invention comprises an adhesion promoter for a printing ink and a printing ink comprising the adhesion promoter. The adhesion promoter comprises the product of (a) mixing together a solution of a polymer or synthetic resin with an organophosphorus compound, and then (b) mixing the mixture formed in (a) with a titanium compound selected from a titanium halide, alkoxide, halo-alkoxide or a condensed titanium alkoxide or a mixture of more than one of these titanium compounds.

Abstract: The present invention relates to polycarbonate compositions comprising: A) an aromatic polycarbonate and/or aromatic polyester carbonate; B) a graft polymer obtainable by co-precipitation of a mixture of at least two graft polymer dispersions B.1 and B.2, wherein the production of the graft polymer component B.1 takes place using at least one redox system as initiator and wherein the production of the graft polymer component B.2 takes place using at least one persulfate compound as initiator; C) optionally a vinyl (co)polymer and/or polyalkylene terephthalate; D) optionally a phosphorus-containing flame retardant; E) at least one phenolic antioxidant; F) optionally a neutral phosphorus- or sulfur-containing co-stabilisers (synergists); and G) optionally additives. Compositions of the present invention are distinguished by an optimum combination of good hydrolysis resistance and a light natural colour.

Abstract: A method of forming a compatibilized blend of a polymeric material and one or more additives and/or fillers is disclosed. The method includes blending the polymeric material and or more additives and/or fillers with an exfoliated clay.

Abstract: A multi-functional admixture for concrete, having improved fluidity for providing hardened materials with improved early strength, smaller shrinkage rate, improved resistance against freezing and thawing action and slower carbonation speed, contains a specified kind of graft copolymer and/or its salt, a specified kind of (poly)alkyleneglycol monoalkyl ether and a specified kind of organic phosphate at specified ratios.

Abstract: A thermoplastic composition includes particular amounts of a poly(arylene ether), a hydrogenated block copolymer, a plasticizer, a white pigment, and an ultraviolet radiation stabilizer. The composition exhibits excellent light stability, and it is particularly useful for forming white or off-white cable insulation.

Abstract: A flame retardant thermoplastic composition comprises: a poly(arylene ether); an impact modifier; a polyolefin; a phosphoric acid salt selected from the group consisting of melamine phosphate, melamine pyrophosphate, melamine orthophosphate, diammonium phosphate, monoammonium phosphate, phosphoric acid amide, melamine polyphosphate, ammonium polyphosphate, polyphosphoric acid amide, and combinations of two or more of the foregoing; a metal hydroxide; and an organic phosphate wherein the amount of phosphoric acid salt by weight is greater than or equal to the amount of organic phosphate by weight. The flame retardant composition is may be used in the production of electrical wires.

Abstract: A thermoplastic composition includes particular amounts of a poly(arylene ether), a hydrogenated block copolymer, a copolymer of ethylene and an alpha-olefin, a plasticizer, a white pigment, and an ultraviolet radiation stabilizer. The composition exhibits excellent light stability, and it is particularly useful for forming white or off-white cable insulation.

Abstract: Flame retardant polycarbonate resin composition are disclosed, which can include (A) about 45 to about 95 parts by weight of a thermoplastic polycarbonate resin; (B) about 1 to about 50 parts by weight of a rubber modified vinyl-grafted copolymer; (C) about 0 to about 50 parts by weight of a vinyl copolymer; (D) about 1 to about 30 parts by weight of an organophosphorus compound consisting of (d1) about 1 to about 75% by weight of a phosphonate compound having a specific structure; and (d2) about 25 to about 99% by weight of an oligomeric phosphate ester compound per 100 parts by weight of the sum of (A), (B) and (C); and (E) about 0.05 to about 5 parts by weight of a fluorinated polyolefin resin per 100 parts by weight of the sum of (A), (B) and (C).

Abstract: The present invention relates to a production process of polyphenylene ether composition comprising (A-1) a polyphenylene ether, (A-2) a polystyrene, (A-3) an ester phosphate, (B) a hindered amine light stabilizer, and (C) an ultraviolet absorber. The feature of the present invention is melt compounding a part of raw materials to obtain a pre-mixture at Step 1, and melt compounding the pre-mixture and the rest of the raw materials at Step 2. A polyphenylene ether composition which has a good light-discoloration resistance and causes little unmelted portion, and to a molded article formed from the polyphenylene ether composition can be obtained according to the production process of the present invention.

Abstract: A thermoplastic molding composition characterized by its flame retardance and impact strength is disclosed. The composition contains (A) linear aromatic (co)polycarbonate, (B) a graft (co)polymer having core-shell morphology, the shell containing polymerized alkyl(meth)acrylate and the core containing interpenetrated and inseparable polyorganosiloxane and poly(meth)alkyl acrylate components, (C) a phosphorous-containing flame retardant compound, (D) fluorinated polyolefin and (E) a boron compound, and optionally SAN. The composition is further characterized in that it contains no polyalkylene terephthalate.

Abstract: The present invention relates to a polycarbonate resin composition having an excellent weld strength.

Abstract: The present invention relates to an encapsulated epoxy-resin molding compound, comprising an epoxy resin (A), a hardening agent (B), and magnesium hydroxide (C), wherein the magnesium hydroxide (C) has a [101]/[001] peak intensity ratio of 0.9 or more as determined by X-ray diffraction, a BET specific surface area of 1 to 4 m2/g, and an average particle diameter of 5 ?m or less, and provides an encapsulated epoxy-resin molding compound superior in flame resistance moldability and also in reliability such as reflow resistance, moisture resistance, high-temperature storage stability, and thus, favorable for sealing VLSI, and an electronic component device carrying an element sealed with the molding compound.

Abstract: The invention relates to: a process for producing a poly(phenylene ether) resin composition which comprises (A) a poly(phenylene ether) and (B) a styrene resin and in which the styrene resin (B) is a styrene resin comprising a rubber-modified polystyrene containing a polybutadiene having 90% or higher cis-1,4 bonds, the process comprising a first step in which the poly(phenylene ether) (A) is melt-kneaded together with (B1) part or all of the styrene resin which does not include any rubber-modified polystyrene containing an unhydrogenated polybutadiene and a subsequent second step in which the remaining styrene resin including (B2) a rubber-modified polystyrene containing a polybutadiene having 90% or higher cis-1,4 bonds is melt-kneaded; and a poly(phenylene ether) resin composition obtained by the process.

Abstract: Disclosed herein is a flame retardant thermoplastic resin composition that has superior scratch resistance and mechanical properties, satisfying requirements for the appearance of housing materials resulting from a recent increase in volume of electrical and electronic products, and that contains a phosphorus-based flame-retarding agent, satisfying requirements for fire safety and prevention of environmental problems. The resin composition with scratch resistance comprises a base resin comprising (A) about 30 to about 90 parts by weight of a polycarbonate resin, (B) about 15 to about 50 parts by weight of a polymethylmethacrylate resin and (C) about 5 to about 50 parts by weight of a polyethylene terephthalate-based resin, and (D) about 5 to about 30 parts by weight of a phosphorus-based flame-retarding agent based on 100 parts by weight of the base resin. The composition may further comprise about 1 to about 30 parts by weight of an impact modifier based on 100 parts by weight of the base resin.

Abstract: A flexible resin composition comprises poly(arylene ether) resin, syndiotactic polystyrene, olefin elastomer, hydrogenated styrene-butadiene copolymer, and a non-halogen fire retardant.

Abstract: The invention relates to A polyester moulding composition consisting of (A) 100 parts by weight (pbw) of a polymer composition consisting of (A-i) at least 50 pbw of a thermoplastic polyester, and, optionally, (A-ii) at least one other polymer, (B) between 2 and 40 pbw of a flame retardant system consisting of (B-i) a nitrogen based organic flame retardant compound free of phosphorus or a phosphorus free salt thereof, and, optionally, (B-ii) less than 1 pbw of a phosphorus containing flame retardant compound, (C) between 0.01 and 1 pbw of a mould release agent, and optionally (D) 0-10 pbw of a fibrous reinforcing agent, and (E) 0-100 pbw of other additives. The invention also relates to the use of the composition for making molded parts, in particular part for use in electrical or electronic applications, and to these molded parts.

Abstract: A phosphate-phosphonate compound which is lowly volatile, has a high phosphorus content, and does not influence various properties of a product when used as a material therefor. It is reduced in environmental burden in view of suitability for recycling and contains no halogen atoms including chlorine and bromine. The phosphorus compound has a phosphate-phosphonate bond within the molecule and has a specific ring structure. Because of this, the compound has excellent flame retardancy. Addition of the phosphate-phosphonate compound as a flame retardant for polyurethanes or polyesters imparts satisfactory plasticity and flame retardancy. The flame retardant is reduced in the exertion of adverse influences on the material properties of, in particular, polyurethane foams, polyester fibers, and the like.