| abstract |
Coating compositions based on ethylene vinyl acetate polymers have improved compatability with solvents (especially with aliphatic hydrocarbon solvents) hydrocarbon oils, and mineral waxes by blending the EVA with a fatty acid and heating at or above the melting point of the EVA. Furthermore the resultant blends are much more easily emulsified in the presence of cations that blends which have not been processed with the fatty acid. Typically the starting material for the improved product of this invention is a composition comprising a blend of an EVA polymer and a fatty acid which is miscible in all proportions with mineral spirits at 25 DEG C or forms a solution at a level 5% of fatty acid in mineral spirits, such as coconut or palm fatty acids. Also disclosed is that the addition of a salt of an amine acetic acid in sufficient quantity to an acidified salt of zirconium (for example EDTA and zironium acetate) forms a novel emulsifying agent, and this emulsifying system is used advantageously with the described EVA/fatty acid blends. |