초록 ▼

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

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.

대표청구항 ▼

[ I claim:] [1.] A thin and drapable, non-pourable, in situ-expandable film having a uniform thickness of .+-.10% variation, of up to about 3.5 millimeters, that contains (i) a non-pourable thermosetting matrix resin system and (ii) particles of a microcellular in situ-expandable thermoplastic polym

[ I claim:] [1.] A thin and drapable, non-pourable, in situ-expandable film having a uniform thickness of .+-.10% variation, of up to about 3.5 millimeters, 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 suitable for forming expanded closed-cell microspheres in which both (i) and (ii) are uniformly distributed throughout the film, so that upon expansion of the thermoplastic polymer into closed-cell microcells in the non-pourable film, the resulting film is a molded thermoset thin film closed-microcell syntactic foam the thickness of which is about 1.01 to about 4 times greater than the non-expanded film.