Use of polytetrafluoroethylene resins as a nucleating agent for foam molded thermoplastics
AssigneeGeneral Electric Company
InventorsAnn M. Burnell, Albin P. Berzinis, Timothy M. Conroy, Kim G. Balfour
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Abstract
A process for producing structural aromatic polycarbonate thermoplastic foam is provided which involves gas expansion of a melted aromatic polycarbonate thermoplastic resin composition containing an amount of a polytetrafluoroethylene nucleating agent. The thermoplastic resin compositions provided exhibit an improved uniformity of cell structure in the resultant structural thermoplastic foam as a result of the incorporation of the polytetrafluoroethylene nucleating agent. The process and compositions are useful in the production of structural thermoplastic foam articles.
Claims11
A process for producing structural aromatic polycarbonate thermoplastic foam articles, said process comprising:
- gas expansion of a melted aromatic polycarbonate thermoplastic resin composition comprising at least one foamable aromatic polycarbonate thermoplastic resin and an amount of a microfibrillar polytetrafluoroethylene nucleating agent effective to enhance the cell structure uniformity of the structural foam.
A process for producing structural thermoplastic foam, said process comprising:
- gas expansion of a melt thermoplastic resin composition comprising an aromatic polycarbonate resin, a rubber modified vinyl aromatic graft copolymer and an amount of a microfibrillar polytetrafluoroethylene nucleating agent effective to improve the cell structure uniformity of the resultant structural foam.
Dependencies are inferred from the claim text.