Synthesis and characterization of an acid catalyst for acrylic-melamine resin systems based on colloidal unimolecular polymer (CUP) particles of MMA-AMPS
| Autor: | Michael R. Van De Mark, Ameya M. Natu |
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| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
Melamine resin Materials science General Chemical Engineering Organic Chemistry Polymer engineering.material Sulfonic acid Surfaces Coatings and Films Catalysis Solvent Colloid Chemical engineering chemistry Polymer chemistry Materials Chemistry engineering Copolymer Curing (chemistry) |
| Zdroj: | Progress in Organic Coatings. 81:35-46 |
| ISSN: | 0300-9440 |
| DOI: | 10.1016/j.porgcoat.2014.12.008 |
| Popis: | Colloidal unimolecular polymer particles (CUPs) based on poly(methyl methacrylate-co-2-acrylamido-2-methylpropane sulfonic acid) were synthesized and characterized and its potential for use as a blocked acid catalyst for curing of acrylic-melamine based resin systems were evaluated. These CUPs were synthesized by the process of water reduction of acrylic copolymers and had zero volatile organic content (VOC). The curing performance of CUPs was evaluated by way of pencil hardness, micro-indentation hardness and solvent resistance measurements. These sulfonic acid containing CUPs catalyzed the curing of acrylic-melamine systems effectively and were found to provide final resin properties comparable to the commercially used blocked acid catalysts. On a molar equivalent basis, the amount of CUP catalyst required for the final cured film properties was lower than the commercial blocked acid catalyst. NMR analysis confirmed that the commercial acid catalyst leached out of the cured film when exposed to water for 24 h while the CUP catalyzed coating did not. |
| Databáze: | OpenAIRE |
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