A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
One-component, low VOC, ambient cure architectural coatings formulated using CAM acrylic latexes
The current drive to develop low VOC architectural coatings includes focused research into one-component, ambient curable latexes. This motivation is stimulated by regulations to reduce solvent usage in architectural coatings, and customer desire to reduce the odor. Castor Acrylated Monomer (CAM) is a novel monomer derived from a renewable resource that marries two coatings technologies - high molecular weight latexes with oil-modified polyesters. CAM polymer performance has been examined with relevance to both in-house and commercial latex controls, and CAM ambient cure crosslinking has been proven using DSC. Glass transition temperature (Tg) increase differed with cure temperature, and the Tg, was found to increase 2, 6, and 12 deg C with 5, 10, and 15 phm CAM, respectively, at ambient temperature. The maximum degree of cure was achieved within 43 hours at ambient temperature. CAM coating Tgs were found to increase proportionally in magnitude with latex film Tg. CAM ambient curing was found to improve block resistance and dirt pickup resistance such that higher CAM-containing latex coatings rivaled the commercial control even though its Tg was 12 deg C higher. Thus, CAM polymers provide ambient crosslinking and solvent reduction in architectural coatings while utilizing a renewable resource.
One-component, low VOC, ambient cure architectural coatings formulated using CAM acrylic latexes
The current drive to develop low VOC architectural coatings includes focused research into one-component, ambient curable latexes. This motivation is stimulated by regulations to reduce solvent usage in architectural coatings, and customer desire to reduce the odor. Castor Acrylated Monomer (CAM) is a novel monomer derived from a renewable resource that marries two coatings technologies - high molecular weight latexes with oil-modified polyesters. CAM polymer performance has been examined with relevance to both in-house and commercial latex controls, and CAM ambient cure crosslinking has been proven using DSC. Glass transition temperature (Tg) increase differed with cure temperature, and the Tg, was found to increase 2, 6, and 12 deg C with 5, 10, and 15 phm CAM, respectively, at ambient temperature. The maximum degree of cure was achieved within 43 hours at ambient temperature. CAM coating Tgs were found to increase proportionally in magnitude with latex film Tg. CAM ambient curing was found to improve block resistance and dirt pickup resistance such that higher CAM-containing latex coatings rivaled the commercial control even though its Tg was 12 deg C higher. Thus, CAM polymers provide ambient crosslinking and solvent reduction in architectural coatings while utilizing a renewable resource.
One-component, low VOC, ambient cure architectural coatings formulated using CAM acrylic latexes
King, C.L. (author) / Smith, O.W. (author) / Thames, S.F. (author)
2001
15 Seiten, 10 Bilder, 2 Tabellen, 30 Quellen
Conference paper
English
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