Lubricated metallic container stocks and method of preparing the same and applying organic coating thereto

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO RE31349
SERIAL NO

06211130

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Abstract

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Metallic container stocks are lubricated with citric acid esters. The improved lubricated container stocks of the invention are characterized by excellent wettability and adhesion of organic coatings in general and especially epoxy resin coating compositions. The citric acid ester lubricants are pharmacologically safe and are easily applied at low cost by electrostatic deposition and other methods presently used for applying prior art lubricating agents. The method of the invention is especially useful in lubricating tinplate strip, blackplate strip, blackplate strip having a chromium-containing coating thereon, and aluminum strip of container stock gauge with citric acid ester lubricants having the following structural formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are individually selected from the group consisting of hydrogen and alcoholic residual containing 1-18 carbon atoms, R.sub.4 is selected from the group consisting of hydrogen and carboxylic acid radicals containing 1-18 carbon atoms, and at least one of R.sub.1, R.sub.2 and R.sub.3 is an alcoholic residue. The invention further provides a novel method of applying an organic coating on lubricated metallic container stocks.

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Patent Owner(s)

Patent OwnerAddress
NATIONAL STEEL CORPORATIONPITTSBURG PENNSYLVANIA 15222

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bray, James A Salineville, OH 8 57
Smith, John R Richmond, OH 190 5171

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