Abstract: Uncured polyester resins are removed from the surfaces of processing equipment, e.g. mixing and injection heads, by a cleaning solution comprising:A. At least about 50 weight percent of at least one dibasic acid ester, such as DBE;B. A sufficient amount of at least one free radical polymerization inhibitor, e.g. hydroquinone, to inhibit the cure of the polyester resin system; andC. A sufficient amount of at least one chelating agent, e.g. tartaric acid, to inhibit the promotional effects of the metal-ion promoter of the free radical polymerization catalyst system.

Abstract: Uncured polyurethane resin systems are efficiently removed from the surfaces of dispensing equipment, tools and other such items on which the resin systems are not desired by a cleaning solution comprising:1. water;2. at least about 2 wt % of at least one dibasic ester; and3. a catalytic amount of a catalyst for promoting a reaction between the isocyanate and the water.Preferably, the cleaning solution contains a solubilizing amount of a cosolvent and/or surfactant capable of coupling with the dibasic ester.

Abstract: Dried resins, such as polyester sheet molding resins, are effectively removed from metallic surfaces by a cleaning composition prepared from a cleaning concentrate comprising an an organophosphoric ester surfactant; a nonionic surfactant, such as an acetylenic alcohol or diol, or a polyoxyethylene oxide ether of an alkyl phenol or alkanol; and a water-miscible solvent such as a 2-pyrrolidone, tetrahydrofurfuryl alcohol, or an ethoxylated THFA or furfuryl alcohol. The cleaning compositions can contain detergent builders, chelating agents, and other optional components.

Abstract: A paint stripping composition used in a process where it is applied to a substrate coated with fully or partially cured paint, having particular utility for use in stripping paint with other utilities, e.g. stripping organic polymer coatings also contemplated, and a method of employing same is described.