Abstract: In-situ formation of metal sulfonate curing agents for foundry sand binders.

Abstract: Foundry sand mixes comprising a mixture of sand, binder, and hydrogen peroxide are improved with respect to bench life by the addition thereto, at the time of initial preparation of the mixture, of non-catalyzing amounts, but stabilizing amounts, of certain iron chelating agents which are acid or salts of acids selected from those which, in their free acid form, have an acidic pH less than 3.0 when dissolved at 1 percent weight per weight in water or when saturated in water, whichever is lower in concentration.

Abstract: A furfuryl alcohol-based foundry binder for use in the manufacture of large foundry sand shapes is disclosed. It is intended as a replacement for conventional alkyd oil foundry binders, and comprises a monomeric mixture of furfuryl alcohol, other alcohols, glycols, or polyols, and high boiling mixtures of ester-substituted diphenyl and polyphenyl aromatic compounds, and a strong acid catalyst. In addition, the binder may include, for example, urea-formaldehyde syrup.

Abstract: The pressure sensitive adhesive of this invention has improved shear resistance while still having good tackiness and stability in a humid atmosphere, it is prepared by solution polymerization, or by other methods, and has carboxylic acid groups therein, an alkoxyalkyl ester of an unsaturated carboxylic acid, an hydroxyalkyl ester of an unsaturated carboxylic acid having at least one hydroxyl functionality and, in many cases, an alkyl acrylate or an alkyl methacrylate. A crosslinker may be used, and the adhesive cured by heat, without destroying the proper relationship of tack and shear resistance.