Shaped articles of foam plastics

Details Shaped articles of foam plastics Shaped articles of foam plastics

1977-03-30

1978-11-14

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

428311, 428451, 428921, B32B 326

Patent

active

041256646

ABSTRACT:
Shaped part based on rigid urea formaldehyde or melamine formaldehyde foam of at least partially open cell structure and having density of 5 to 150 kgs/cu.m. The cells of the foam material adjoining the periphery of at least one external surface of the shaped part are impregnated with a silicate, and the external surface is coated with a silicate lacquer which forms a continuous top coat. A reinforcing sheet material is bonded to the top coat. The shaped part is of improved fire proofness, and compressive, tensile, and flexural strength of the foam.

REFERENCES:
patent: 3194708 (1965-07-01), Fourcade et al.
patent: 3269887 (1966-08-01), Windecker
patent: 3451842 (1969-06-01), Kurz
patent: 3627622 (1971-12-01), Vega
patent: 3728206 (1973-04-01), Buese
patent: 3764365 (1973-10-01), Duncan et al.
patent: 4015386 (1977-04-01), Cook
patent: 4024310 (1977-05-01), Wooler et al.

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