Thermoplastic formable blends, a foaming method and products made thereby
AssigneeGeneral Electric Company
InventorGeorge E. Niznik
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Abstract
Foamable blends are provided of high performance thermoplastic polymers such as polycarbonates, polyesters, etc., and an effective amount of a dihydrooxadiazinone blowing agent. The blends can be melt extruded into pellets and sheet and converted into thermoplastic foam structures in accordance with conventional injection molding techniques.
Claims32
A substantially uniform injection moldable foamable blend comprising thermoplastic organic polymer and from 0.1% to 25% by weight of 5-phenyl-3,6-dihydro-1,3,4-oxadiazin-2-one.
A substantially uniform injection moldable foamable blend comprising a 5-phenyl-3,6-dihydro-1,3,4-oradiazin-2-one and thermoplastic organic polymeric material having at least 5% by weight of chemically combined haloalkylene polycarbonate units of the formula, ##STR7## where R.sup.5 and R.sup.6 are the same or different divalent aromatic radicals having from 6-13 carbon atoms, X is a halogen atom and X.sup.1 is selected from X and hydrogen.
Thermoplastic pellets comprising a 2,2-bis (4-hydroxyphenyl)propane polycarbonate resin and about 0.1 to 1.0% by weight of 5-phenyl-3,6-dihydro-1,3,4-oxadiazin-2-one, based on the weight of the pellets.
Thermoplastic pellets consisting essentially of a polyalkylene terephthalate and about 0.1 to 1.0% by weight of 3,6-dihydro-5,6-diphenyl-1,3,4-oxadiazine-2-one based on the weight of the pellets.
A substantially uniform injection moldable foamable blend comprising thermoplastic organic polymer and 0.1% to 25% by weight of a dihydrooxadiazinone, where the thermoplastic organic polymer is selected from the class consisting of polyalkylene terephthalates, polycarbonates, polyamides, polyester-polyether copolymers, polycarbonate copolymers and blends thereof.
Dependencies are inferred from the claim text.