Method of molding foamed polyurethane articles

Details Method of molding foamed polyurethane articles Method of molding foamed polyurethane articles

1976-03-19

1978-07-04

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

23252R, 366 96, 264 53, 366 96, B29D 2704

Patent

active

040988554

ABSTRACT:
A method is described for molding foamed polyurethane, articles from a plurality of components, including a polyol, an isocyanate component and a volatile liquid blowing agent. The components are brought to a substantially constant temperature, charged with gas, mixed together by introducing them under elevated pressure in the form of jets into a confined chamber and then introduced into a preheated mould which is at a substantially constant temperature.

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patent: 3063952 (1962-11-01), Vieli
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patent: 3771963 (1973-11-01), Breer et al.
patent: 3772224 (1973-11-01), Marlin et al.
patent: 3773298 (1973-11-01), Gebert
patent: 3788337 (1974-01-01), Breer
patent: 3917779 (1975-11-01), Breer et al.
patent: 3936036 (1976-02-01), Fries
Knox, R. E., "Frothing--A New Method for Producing Urethane Foams," in Chemical Engineering Progress, (vol. 57, No. 10), Oct. 1961, pp. 40-47.

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