Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1996-12-12
1998-11-17
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 63, 521 64, 521154, 521178, 521184, 523219, C08J 928, C08J 932, C08J 935
Patent
active
058377395
ABSTRACT:
A syntactic foam-core material and method for its production are disclosed wherein glass microspheres and chopped fiberglass are dispersed within a slurry comprised of a suitable resin such as an epoxy and a suitable solvent such as methyl ethyl ketone. Under carefully controlled vacuum and rate of addition conditions, the microspheres and chopped fiberglass are added to the slurry to form a light weight syntactic foam-core material. The material may either be stored under cold conditions for use at a later time as a B-stage material or it may be shaped and/or molded to conform to a desired configuration which, for example, may correspond with a desired component part. After curing, the material may be machined to final dimensions. The material may be characterized as a tightly packed network of resin-coated microspheres spaced by controlled, yet random voids comprising at least 20%, and more usually, between 23 and 25% by volume, of the fully-cured material.
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Nowak Gregory P.
Tegeler Alan F.
Timmons Tracy L.
Foelak Morton
McDonnell Douglas Corporation
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