Method of reducing failure of pressurized container valves

Details Method of reducing failure of pressurized container valves Method of reducing failure of pressurized container valves

1980-11-25

1987-05-26

Rolla, Joseph J.

Dispensing

With conveying conduit jacket and/or inert atmosphere...

2224021, 53403, 53432, 53470, 141 3, 141 20, B65B 3100

Patent

active

046678557

ABSTRACT:
Valves connected to dip tubes in conventional pressurized "aerosol"-type containers for dispensing materials which react or cure upon dispensing (e.g. moisture-curable polyurethanes), are protected against premature failure by introducing a small amount of dry, inert gas into the dip-tube shortly after charging the container. The gas (e.g. nitrogen) acts as a barrier to prevent contact between the product in the container and the valve mechanism prior to use of the product. Preventing such contact avoids premature hardening of product in the valve mechanism caused by reaction of product with moisture.

REFERENCES:
patent: 2723200 (1955-11-01), Pyenson
patent: 2752083 (1956-06-01), Ullman et al.
patent: 2820489 (1958-01-01), Day et al.
patent: 3387425 (1968-06-01), Flanner
patent: 3545162 (1970-12-01), Clapp
patent: 3653414 (1972-04-01), Weider
patent: 3908869 (1975-09-01), Little
patent: 4146066 (1979-03-01), Dietrich et al.
Kirk Othmer, "Encyclopedia of Chemical Technology", 3rd Edition, vol. 3 (1978), pp. 582-587.

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