Abstract: The present invention is an flame resistant resin composition comprising: A) from about 50 to about 90 parts by weight of a rubber modified polymer derived from a vinyl aromatic monomer, B) from about 1 to about 8 parts by weight of an impact modifier, C) from about 0.5 to about 5 parts by weight of a polyolefin having a density of greater than 0.940 g/cm3 and a melt flow rate of less than 4 as measured according to ASTM D1238 at 190° C. using a 2.16 kg weight, D) a sufficient amount of a halogen-containing flame retardant to provide the composition with 7 to 14 parts by weight halogen, and E) from about 2 to about 6 parts by weight of an inorganic flame retardant synergist.

Abstract: Disclosed is a process for the preparation of a thermoplastic polymer blend comprising a first preformed thermoplastic polymer such as a polyester, polycarbonate, ABS graft polymer and the like and a second thermoplastic polyamide or polyamideimide. The second polymer is prepared from a diisocyanate and polycarboxylic compund selected from a dicarboxylic acid, tricarboxylic acid or anhydride thereof, or mixtures of these components by reactively processing the monomer components in the presence of the first polymer.

Abstract: Disclosed is a process for the preparation of a polyamideimide semi-flexible foam wherein a foam precursor is first prepared by heating together a mixture of an organic polyisocyanate, an aromatic polycarboxylic compound and a catalyst comprising a cyclic phosphorus compound, optionally in the presence of a surfactant until at least about 45 percent of the theoretical carbon dioxide has been evolved. The solidified precursor is comminuted and then heated to complete the reaction producing polyamideimide foam.

Abstract: A process is described for increasing the molecular weights of thermoplastic polyamides and polyesteramides by fluxing and homogenizing the subject polymers which have been prepared by the reaction of an organic diisocyanate and a dicarboxylic acid with an effective amount of an organic diisocyanate reagent at a temperature of at least about 150.degree. C.

Abstract: Disclosed are novel blends comprising segmented polyesteramides with minor amounts of aliphatic polyamides.The blends are characterized by good physical properties including improved elongation and solvent resistance over the base polyesteramides. The polymers so obtained find utility in the making of seals, gaskets, bushings, and the like.

Abstract: A continuous, solvent-free process is described for the preparation of thermoplastic polyamides and polyester-amides by the reaction of the appropriate organic diisocyanate and dicarboxylic acid or difunctional carboxylic acid-terminated polyester.

Abstract: A melt-polymerization process is described for the preparation of thermoplastic polyamides and polyesteramides by reaction of the appropriate organic diisocyanate and dicarboxylic acid or difunctional carboxylic acid-terminated polyol. The process, which can be conducted in a batch or continuous manner, comprises the steps of admixing the reactants (preferably in the liquid state), heating the mixed reactants at reaction temperature in a manner such that eliminated carbon dioxide can be vented freely, allowing the reaction to proceed until approximately 25-95 percent (preferably at least 50 percent) of the theoretical carbon dioxide has been eliminated and reducing the resulting intermediate to a powder before completing the reaction by melting, homogenizing, and devolatilizing.

Abstract: Disclosed are novel compositions comprising blends of at least about 75 percent by weight of a polyesteramide and the balance of the blends comprising a urethane containing ingredient. Optionally, an antioxidant component is present in the blends.The blends display an unexpected level of stability in regard to their tensile properties when exposed to elevated temperatures.The blends find particular utility in the area of hoses, gaskets, seals, etc., used in handling fluids at elevated temperatures.

Abstract: Novel copolyamides having the recurring unit ##STR1## are disclosed wherein Ar in the major proportion of the recurring units is m-phenylene and in the corresponding minor proportion (but more than 10 percent) of the recurring units Ar is a phenylene ether having the formula ##STR2## The copolyamides have excellent high temperature resistance but, unlike those polymers in which Ar in the above recurring unit is exclusively m-phenylene, they can be injection molded.

Abstract: Segmented thermoplastic polyester-amides are described which are prepared by reacting a polymeric diol (molecular weight in the range of 400 to 4000) with a carboxylic acid terminated prepolymer obtained by reacting an aliphatic ether diamine, optionally in admixture with a minor proportion (based on equivalents) of an alkylene diamine, with an excess of dicarboxylic acid (aromatic or aliphatic). The polyester-amides, which can be prepared preferably by the melt condensation method, have excellent physical properties and resistance to degradation by heat.

Abstract: Substantially linear, segmented polyester amides are described which contain aromatic residues in the "hard" segments but which still possess sufficiently low melt properties to be injection moldable. The polyester amides are obtained by reacting a carboxylic acid-terminated prepolymer (derived by reacting an excess of a dicarboxylic acid with a polymeric diol of molecular weight 400 to 4000) with a stoichiometric amount of methylenebis(phenyl isocyanate) or toluene diisocyanate or mixtures of these isocyanates and, optionally, a dicarboxylic acid.