Method for entraining gas in a liquid chemical precursor for rea

Details Method for entraining gas in a liquid chemical precursor for rea Method for entraining gas in a liquid chemical precursor for rea

1977-10-11

1979-06-05

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

422131, 422133, 422135, 521917, C08J 930

Patent

active

041574273

ABSTRACT:
In a preferred embodiment, minute bubbles of a suitable gas are rapidly entrained in a liquid chemical constituent of a reaction injection molding system (e.g., polyurethane) to reduce the viscosity of the constituent and the density of parts molded therefrom. A small portion of the constituent is continuously withdrawn from and returned to a main holding tank via a recirculation line wherein minute gas bubbles are dispersed from a microporous stone into the flowing portion of the constituent. The recirculating and gas entraining processes are continued until a predetermined quantity of the gas is dispersed in the molding constituent.

REFERENCES:
patent: 3063952 (1962-11-01), Villi
patent: 3096001 (1963-07-01), Boe et al.
patent: 3170972 (1965-02-01), Knipp et al.
patent: 3188296 (1965-06-01), Hoppe et al.
patent: 3488300 (1970-01-01), Burkholder
patent: 3769232 (1973-10-01), Houldridge
patent: 3796779 (1974-03-01), Greenberg
patent: 3882052 (1975-05-01), Raynor et al.

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