Manufacture of lightweight structural elements

Details Manufacture of lightweight structural elements Manufacture of lightweight structural elements

1988-05-05

1990-04-24

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264259, 264DIG6, B29C 6720, B29C 6724

Patent

active

049198661

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.

REFERENCES:
patent: 3541194 (1970-11-01), Resnick
patent: 3585157 (1971-06-01), Beck
patent: 3764247 (1973-10-01), Garrett et al.
patent: 4086098 (1978-04-01), Le Ruyet et al.
patent: 4560523 (1985-12-01), Plumley et al.

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