Abstract: An improved thermoplastic nylon molding resin comprising intimately mixed nylon molding resin and glass reinforcing agents in the presence of polyethylene terephthalate resin.

Abstract: The long term heat stabilized polyalkylene terephthalate resin composition comprises a polyalkylene terephthalate resin selected from the group consisting of polypropylene terephthalate and polybutylene terephthalate, 2 to 60 percent of the total composition of a reinforcing filler and stabilizing amounts of the combination of polyamide polymer, phenoxy resin and an organic phosphonate. The composition retains a higher degree of tensile strength after high temperature long-term aging than does any polyalkylene terephthalate composition of the prior art.

Abstract: Blow molded polybutylene terephthalate articles and a process for making them. A polybutylene terephthalate melt at a temperature in the range of the melt temperature of polybutylene terephthalate and 495.degree.F., and having an intrinsic viscosity of at least 1.05 deciliters per gram is blow molded in an extrusion blow molding apparatus the mold of which is maintained at a temperature of less than 150.degree.F. to produce polybutylene terephthalate blown articles possessing excellent strength characteristics. Bottles, especially aerosol pressurized bottles, are a primary application of the type of articles produced by this process.