Expandable films and molded products therefrom
AssigneeThe Dexter Corporation
InventorRaymond S. Wong
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Abstract
A thin, tacky, non-pourable film of incompatible in situ-expandable thermoplastic particles and thermosettable matrix resin that contains an essentially uniform density and thickness across the breadth of the film. The in situ-expandable mass is not pourable yet can be easily dispensed in a uniform manner within a mold and thereafter expanded to the dimensions of the mold. Composites and reinforced compositions, as well as methods of molding, are disclosed.
Claims12
A tacky and drapable, non-pourable film having a uniform thickness, that contains (i) a non-pourable thermosetting matrix resin system and (ii) particles of a microcellular in situ-expandable thermoplastic polymer containing an expansion agent therein in which both (i) and (ii) are uniformly distributed throughout the film, so that upon expansion of the thermoplastic polymer into microcells in the non-pourable film, the resulting film is a thermoset thin film syntactic foam the thickness of which is about 1.01 to about 4 times greater than the non-expanded film, which film is composited with at least one layer of another material.
Dependencies are inferred from the claim text.