Treatment of the interior surfaces of resinous enclosure members

Details Treatment of the interior surfaces of resinous enclosure members Treatment of the interior surfaces of resinous enclosure members

1985-10-07

1986-10-07

Kittle, John E.

Coating processes

Interior of hollow article coating

Coating by vapor, gas, mist, or smoke

4272554, 427400, 525344, B05D 722, B05D 500, C08F 840

Patent

active

046159142

ABSTRACT:
Plastic containers are treated to provide increased barrier properties to organics and gases such as oxygen by treating the interior surface of the container with SO.sub.3 gas. The SO.sub.3 gas is provided by inserting a solid pellet of poly-SO.sub.3 into the container and evaporating the SO.sub.3 such as with microwave energy. A solid neutralizing agent such as ammonium carbonate is then placed into the container and evaporated with microwave energy to form ammonia which neutralizes the sulfonic acid groups on the surface interior of the container.

REFERENCES:
patent: 2832696 (1958-04-01), Walles
patent: 3613957 (1971-10-01), Walles
patent: 3770706 (1973-11-01), Walles
patent: 3940377 (1976-02-01), Horowitz et al.
patent: 4220739 (1980-09-01), Walles
patent: 4425460 (1984-01-01), Makowski et al.

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