Abstract: A heat-resistant composition contains solvent-soluble polyimide resin (A) and a phosphazene compound (B) in relation to a polyimide resin composition having solubility in a low-boiling solvent, heat resistance, flame resistance, adhesiveness and mechanical properties. The said phosphazene compound (B) is a cyclic phenoxyphosphazene compound (B1) expressed in the following chemical formula (1): where m represents an integer of 3 to 25 and Ph represents a phenyl group.

Abstract: The present invention relates to a flame retardant thermoplastic resin composition comprising: (A) 100 parts by weight of a rubber-reinforced thermoplastic resin comprising: a graft copolymer (A1) produced by graft-polymerizing a monomer component (b) containing an aromatic vinyl compound, a cyanided vinyl compound and, if required, the other copolymerizable monomer in the presence of a rubber polymer (a) containing polymer particles having a particle size of not more than 150 nm in an amount of 0 to 15% by weight, polymer particles having a particle size of from more than 150 to less than 350 nm in an amount of 60 to 100% by weight and polymer particles having a particle size of not less than 350 nm in an amount of 0 to 40% by weight, or a mixture of the graft copolymer (A1) and a copolymer (A2) of monomer component (b′), said rubber-reinforced thermoplastic resin (A) having a graft ratio of 20 to 150% and a rubber polymer content of 8 to 20% by weight; and (B) 5 to 20 parts by weight of a phosphor

Abstract: A halogen-free, flame retardant polyester composition comprises, based on the total composition, (a) A poly(ethylene terephthalate) with a molecular weight of at least 50,000 or a blend of poly(ethylene terephthalate) with another polyester, taking into account that the ratio poly(ethylene terephthalate)/other polyester should be at least 55/45. (b) A combination of at least one N-containing compound, selected from the group of triazine, guanidine, or (iso)cyanurate compounds, and at least one P-containing compound, selected from the group of BPA-diphosphates or phosphoramides with the proviso that the ratio of the total amount of P- and N-containing compounds over the total polyester amount should be between 0.3 and 0.6 and the ratio of the P-containing compound over the N-containing compound should be higher than 0.8. (c) An anti-dripping agent in an amount of 0.01-2 weight percent of the total composition. (d) A reinforcing filler in an amount of 0-40 weight percent of the total composition.

Abstract: A polyester composition includes a poly(butylene terephthalate), a nitrogen-containing flame retardant, and a phosphorus-containing flame retardant, such that the weight ratio of the total of the nitrogen-containing flame retardant and the phosphorus-containing flame retardant to poly(butylene terephthalate resin) is at least about 0.70, and the weight ratio of the phosphorus-containing flame retardant to the nitrogen-containing flame retardant is at least about 1.0. The compositions have excellent color stability under ultraviolet light aging, good flame retardance, and high impact strength.

Abstract: A polyalkylene terephthalate-series resin (e.g., polyethylene terephthalate-series resin, polybutylene terephthalate-series resin) is improved in flame retardancy by using a flame retardant containing a phosphazene compound and a phenolic resin. The phosphazene compound is a compound shown by the following formulae (1) and/ or (2), and/or a compound being the above compound crosslinked with a phenylene group or a crosslinking group shown by the following formula (3a). The proportion of the phosphazene compound to the phenolic resin is the former/the latter=5/95 to 95/5 (weight ratio). By means of the above flame retardant, a polyalkylene terephthalate-series resin can be highly improved in flame retardancy without deteriorating the properties. Further, by adding the other flame retardant (e.g., a nitrogen-containing flame retardant, a phosphate-series flame retardant), and a carbonizable resin, the flame retardancy can be enhanced.

Abstract: A halogen-free, flame retardant polyester composition comprises, based on the total composition,

Abstract: The present invention relates to cyclic phosphazene azides and their use in a process for producing a rheology modified polymer which comprises contacting a polymer with a cyclic phosphazene azide at a temperature which is at least the decomposition temperature of the cyclic phosphazene azide. When the cyclic phosphazene azide reacts with the polymer, at least two separate polymer chains are advantageously joined and the molecular weight of the polymer chain is increased.

Abstract: This invention relates to flame resistant moulding compounds produced from mixtures of styrene polymers halogenated organic compounds, special polyphosphonic acid amides and optionally conventional additives.

Abstract: Thermoplastic molding compositions comprising 65-80% by weight (based on the molding composition) of a polyvinylbutyral which preferably contains 19-28% by weight (based on the polyvinylbutyral) of vinyl alcohol units, and 35-20% by weight (based on the molding composition) of a plasticizer mixture of 50-99% by weight (based on the plasticizer mixture) of a di-, tri- or tetra-glycol diester and 50-1% by weight (based on the plasticizer mixture) of a phosphoric acid triester. The preparation of the molding compositions by mixing the constituent components and their use for the production of shaped thermoplastic articles, in particular high-strength films for use as the bonding intermediate layer in the production of laminated glass.

Abstract: Organophosphorus compounds having the general formula ##STR1## useful as water tree resistant additives for polymeric compositions.

Abstract: Certain fiber-forming aromatic polyamides having a high solubility in organic solvents used in their preparation are provided. The polyamides are prepared from diacid chlorides and from diamines containing sulfonate linkages by the low temperature solution polymerization technique. Fibers of the polyamides have a high modulus to tenacity ratio.