Chemical apparatus and process disinfecting – deodorizing – preser – Process disinfecting – preserving – deodorizing – or sterilizing – Maintaining environment nondestructive to metal
Patent
1984-05-14
1986-04-22
Lovering, Richard D.
Chemical apparatus and process disinfecting, deodorizing, preser
Process disinfecting, preserving, deodorizing, or sterilizing
Maintaining environment nondestructive to metal
2523152, 252389R, 252390, 252391, 252392, 252404, 422 8, C23F 1100, C23F 1102
Patent
active
045841756
ABSTRACT:
There is disclosed a method for the inhibiting of corrosion of a variety of metals by placing the metal in the presence of a plastic sheet carrier having incorporated therein effective amounts of corrosion inhibitors which include; (a) certain hydroxyalkyl fatty amines, and (b) certain fatty imidazolinium quaternary compounds. The aforementioned compounds provide remarkable corrosion protection for ferrous metals. There can be also included in the plastic certain benzotriazoles or tolyltriazoles when it is desired to extend the protection to copper and copper base alloys, and to aluminum and aluminum base alloys. When protection is also desired for magnesium and magnesium alloys with other metals such as aluminum, there can also be included in the plastic sheet carrier an organic phosphate adduct with diethyl amine. In the preferred embodiment, the metal objects to be protected are sealed in an envelope formed of the plastic sheet material. In this application, extended shelf life and continued effectiveness of the corrosion inhibition can be achieved by also including in the plastic film a non-fugitive organic anti-oxidant, such as an aromatic phenol with sterically hindered hydroxyl groups.
The composition of the invention comprises a stable gel in which the aforementioned plastic additives are dissolved and/or suspended which can be used as a liquid carrier to dispense the aforementioned compounds into the plastic sheet or film during its formation. For this purpose, the aforementioned hydroxyalkyl fatty amines can be gelled, neat or dissolved with a plasticizer for the plastic, by the addition thereto of certain expanding lattice organophyillic clays.
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Lovering Richard D.
Strauss Robert E.
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