Plastics foam production

Details Plastics foam production Plastics foam production

1982-11-19

1984-02-07

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521131, 521917, 521113, 521 99, 261129, 261DIG26, C08G 1814, B01F 304, B01F 506

Patent

active

044304463

ABSTRACT:
Disclosed is a method for forming pre-froth plastics foam which comprises the steps of mixing the plastics components with a volatile liquid under pressure, causing the mixture to flow to a point of use, and maintaining a series of controlled pressure drops by means of present automatic valves or by passive means such as orifice plates. Typical foams are polyurethane and phenolic.

REFERENCES:
patent: 2928130 (1960-03-01), Gray
patent: 3118958 (1964-01-01), White
patent: 3186959 (1965-01-01), Shriver et al.
patent: 3220801 (1965-11-01), Rill et al.
patent: 3377139 (1968-04-01), MacGregor et al.
patent: 3486862 (1969-12-01), Unterstenhoefer
Knox-Chemical Engineering Progress, vol.-57, No. 10, Oct. 1961, pp. 40-47.

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