Abstract: The present disclosure is directed to improving purity of a bisphenol product in a bisphenol by-product isomerization process wherein isomers of bisphenol are isomerized to the desired bisphenol product. During the isomerization, acidic resin fines elute from the acidic ion exchange resin catalyst into the reaction effluent. These resin fines can be filtered effectively and without contamination by a bed of solid particles such as alumina or carbon. The removal of resin fines improves the product quality and yield by eliminating resin particulates and reducing acid catalyzed cracking of bisphenols during purification and finishing steps.

Abstract: The present disclosure is directed to acid scavenging in the acid-catalyzed preparation of a bisphenol by condensation of a phenolic compound and a carbonyl compound. During the preparation, strong acids leach from the acidic ion exchange resin catalyst into the reaction effluent. These acids can be scavenged effectively and without contamination by an inorganic oxide before purification of the product. The acid scavenging improves the product quality and yield by reducing acid catalyzed cracking of bisphenols during purification and finishing steps.

Abstract: Vinyl esters exhibiting reduced viscosity are prepared by esterifying at least 90% of the pendant hydroxyl groups of a vinyl ester prepared by reacting an epoxy resin with an ethylenically unsaturated carboxylic acid with a fatty acid or rosin acid.

Abstract: High impact polystyrene compositions having improved melt flow properties along with good heat resistance is obtained by incorporating about 0.5 to 10 percent by weight of an oxidized polyethylene material having a molecular weight of from about 500 to about 5,000 and an acid number of between about 5 and about 50.

Abstract: A modified photocurable acrylate resin with improved adhesion to metals is prepared by reacting a liquid polyepoxide, an ethylenically unsaturated conjugated organic carboxylic acid, and a secondary monoamine.

Abstract: A modified photocurable acrylate resin with improved adhesion to metals is prepared by reacting a liquid polyepoxide, an ethylenically unsaturated conjugated organic carboxylic acid, and the half ester of an aliphatic monohydric alcohol and a polycarboxylic acid anhydride.