Polymer foam, thermoformed shaped thereof and methods of forming

Details Polymer foam, thermoformed shaped thereof and methods of forming Polymer foam, thermoformed shaped thereof and methods of forming

1984-11-09

1986-04-01

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

264 53, 264321, 521 56, 521 59, 521 60, 521 79, 521 81, 521 98, 521918, C08J 922

Patent

active

045798788

ABSTRACT:
A foam structure having a density of less than about 20 lbs/ft.sup.3. The method of forming the same comprising forming a homogeneous melt blend under pressure of a polymer member selected from the group consisting of polyetherimide resin particles, polycarbonate resin particles, a polymer blend of polyphenylene oxide and polystyrene in particle form imbibed with a blowing agent, followed by extrusion of the same into a lower pressure atmosphere. A composition comprising said particles imbibed with methylene chloride, chloroform, 1,1,2-trichloroethane or mixtures thereof. A method of thermoforming said foam in sheet form.

REFERENCES:
patent: 2525965 (1950-10-01), Smith
patent: 2899708 (1959-08-01), Donaldson et al.
patent: 3277029 (1966-10-01), Chadwick et al.
patent: 3290261 (1966-12-01), Goldblum
patent: 3442829 (1969-05-01), Moore et al.
patent: 3738963 (1973-06-01), Praetorius et al.
patent: 3819545 (1974-06-01), Hunter
patent: 3844876 (1974-10-01), Wilson et al.
patent: 3903224 (1975-09-01), Billiu
patent: 3950484 (1976-04-01), Elgi
patent: 4032309 (1977-06-01), Selemme
patent: 4065401 (1977-12-01), Cohnen
patent: 4097425 (1978-06-01), Niznik
patent: 4241114 (1980-12-01), Gagliani

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