APPLICATION OF METHACRYLIC LACE MONOMERS FOR THE FORMULATION OF SOLVENT BASED COATING RESINS

摘要

Methacrylic monomers serve as essential building blocks for the synthesis of modern solvent and water based polymeric resins. In this regard the request for a broad variety of these perfomance monomers was intensified in the recent past in order to provide polymers with tailor made properties. This paper presents the application of Long Alkyl Chain Esters (LACE) from methacrylic acid focussing on their performance influence in solvent based acrylic coating resins. The range of the tested monomers comprises molecules with branched and unbranched side chains as well as monomers with a chain length distribution of the side chain. The side chain length varied between ten and 20 carbon atoms. The investigations focus on the most striking property of these monomers, the low Tg of the homopolymers, and how it can be applied to reduce the resin Tg. In this regard the structure of the alkyl side chain and the presence of a chain length distribution of the side chain requires consideration. The crosslinking of the resins was performed with IPDI and HDI. Significant differences in film hardness were observed for the application of these two crosslinker materials in combination with the LACE containing polymer resins.