Accession Number : ADA131059

Title :   Stabilization of the Solvent Methyl-n-Amyl Ketone (MAK) in Vinyl Paints.

Descriptive Note : Final rept.,

Corporate Author : CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL

Personal Author(s) : Lange,Armand F ; Beitelman,Alfred D

PDF Url : ADA131059

Report Date : Jun 1983

Pagination or Media Count : 22

Abstract : This research was conducted to devise a way to eliminate the formation of acids during storage of vinyl paint by controlling the acidity of its solvent-methyl-n-amyl ketone (MAK). MAK was found to break down under organic acid catalyzed conditions. The decomposition products, acetic and pentanoic acids, were formed by an oxidation reaction. The reaction is autocatalytic, since the products formed are the catalysts for further reaction. 2-ethyl hexanoic acids was found in the original MAK, but was not produced by the organic-acid-catalyzed oxidation. Under most chromatographic conditions, pentanoic acid would elute very close to MAK and therefore would not be detected. The reaction products suggest that a peroxide is involved in the oxidation. Inhibitors which would eliminate peroxide formation were tested as stabilizers for MAK. Ethanol was found to stabilize MAK to a limited extent. Other inhibitors tested which were successful were 2,2-tris(dimethylaminoethyl) phenol. These are all peroxide inhibitors. It is recommended that any of these inhibitors be used with ethanol in the final paint formulation. (Author)

Descriptors :   *Paints, *Solvents, *Ketones, *Stabilization, Storage, Decomposition, Acetic acid, Oxidation, Inhibitors, Chemical composition

Subject Categories : Organic Chemistry
      Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE