The Dow Chemical Company

John K Ward

Patrick H Martin

James L Dunn, Jr

Johnny B Gardner

An apparatus for applying a coating composition to an article and drying the solvent from the so applied coating prior to introduction of the coated article into the ambient atmosphere, comprising a housing or chamber in a generally 'J' shape in which the small upwardly turned portion of the 'J' defines an inner compartment isolated from the ambient atmosphere by the 'J' configuration when the chamber is filled with a volatile solvent vapor and the inner compartment vapors are at an elevated temperature with respect to the remainder of the vapors in the chamber. The apparatus is provided with condensing means at the ambient atmosphere entrance and exit, a source of solvent vapors which may be integral with the chamber, and a means to introduce heat to the vapors and articles when they are in the inner compartment. The apparatus also includes article handling and moving means for transporting articles to be coated into, through and out of the apparatus as well as spray or dip means to apply the coating to the article.

Apparatus for coating surfaces

A protective curable coating containing a polymerization inhibitor, extractable from the cured coating, which is applied to surfaces located above the liquid level of a storage tank containing a polymerizable alkenyl aromatic monomer, e.g., styrene, vinyl toluene, divinyl benzene on which surfaces said monomer tends to condense. The monomer condensing on the surfaces which have been coated extracts some of the inhibitor from the coating and thus polymerization on these surfaces is prevented or substantially restricted.

Method for preventing polymers formation in styrene storage containers

A method for coating surfaces with organic film-forming compositions, which may contain pigments or coloring matter, characterized by applying the composition to a surface or substrate while subjecting the surface or substrate to a gaseous environment whose temperature is above the boiling point of the vaporizable solvent vehicle(s) of the coating composition and removing the solvent vehicle from the applied coating in a controlled manner while in said gaseous environment. The temperatures of the environment, the surface and the coating composition are selected relative one to the other such that the film of coating will gel yet not 'skin over' until the solvent vehicle has been substantially completely removed from the coating, the solvent vehicle will not be substantially lost from the coating composition until the coating has been applied to the surface, or substrate, and the application of the coating to the surface or substrate will not materially cool the surface or the environment.

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Angleton, TX, United States of America

John K Ward