The goal of this article is to review the development of photoreactive UV-crosslinkable acrylic pressure-sensitive adhesives (PSAs) characterized by low viscosity, which can be coated at room temperature in the form of adhesive layers and are characterized by removable properties after UV-crosslinking. Surfactants and stearic acid have been used to improve the performance of the acrylic PSA, too. They are used for the manufacturing of removable and repositionable self-adhesive products, such as easy peel-able decorative films and wide range version of post-it articles.
3,4-Dihydropyrimidin-2(1H)-ones are synthesized by the three-component condensation of aromatic aldehydes, _-ketoesters and urea or thiourea in methanol or under solvent- free conditions, using aluminum hydrogensulfate as the catalyst
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