Manufacture of lightweight structural elements
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United States of America Patent
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Apr 24, 1990
Grant Date -
N/A
app pub date -
May 5, 1988
filing date -
May 9, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for manufacturing lightweight structural elements, for example, in form of plates which, at low density, have high mechanical strength and good insulating properties, wherein 70-95 parts by weight of open porous blown glass spheres have a grain fraction of 0.2 to 20 mm and a gross density between 0.2 and 0.55 g/cm.sup.3 are mixed with 4-30 parts by weight of an epoxy binder. The epoxy binder consists of a bisphenolic resin, to which 0.5-5 parts by weight of a polysiloxane are added, and an amine hardner. The blown glass spheres are thereby wetted on their surfaces. They are poured into a mold corresponding to the shape of the lightweight structural element, after which heat is added, as a result of which the amine hardener reacts with the polysiloxane and epoxy resin and an epoxy foam results between the blown glass spheres.
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