Poster Preview Session 2
All posters of this Preview Session to be found at Carousel 2P 2.1
High Efficiency - High Performance Organic Pigments
Mark Johnson, Sun Chemical Corporation
A range of “easy to disperse” or “high efficiency” high performance organic pigments for use in a variety of water and solvent based coatings has been developed using new materials and innovative manufacturing processes. Previous offerings in this area required intensive mixing, but in some paint systems these products can be dispersed with only mild agitation (e.g. a slow speed paddle agitator). The degree of dispersion improvement can be adjusted to accommodate paint manufacturers who prefer to maintain their current dispersion processes while enhancing product performance and process efficiency. In either case it appears possible that these new products offer both quality and operational advantages. The range of products includes perylene, quinacridone, phthalocyanine, and other high performance pigments. Data will be presented to demonstrate the processing and performance of these materials.
P 2.2
Advances in Fluoropolymer Resins for Ultra-Weatherable Coatings
Bob Parker, AGC Chemicals Americas
Fluoroethylene vinyl ether (FEVE) resins were developed in 1982. These resins are used to formulate ultra-weatherable coatings, with expected coating life exceeding 30 years in some cases. Applications for coatings based on FEVE resins include architectural, aerospace, automotive, and industrial maintenance markets. Originally, the only available resins were solvent based. Due to increasing VOC and HAPS regulations, new products like solid resins and water based resins have been introduced. This paper will give an overview of FEVE resins, their properties, and their performance. Information on new resin forms and their use in low VOC/HAPS free coatings will be given. Finally, a discussion of long term applications will be given.
P 2.3
New Reactive Dispersants for UV/EB Inks and Coatings
Diana Hull, Lubrizol Performance Coatings
Polymeric pigment dispersants have been synthesized which contain reactive unsaturation which can crosslink into the binder matrix in UV cured coatings and inks. The ability of these materials to perform as effective pigment dispersants will be demonstrated by comparison with commercially available conventional polymeric dispersants on a number of pigments. Investigations into the influence of the reactive dispersant on other coating properties such as hardness development and adhesion to substrates will also be presented.
P 2.4
Optimizing for Low Energy-Low Light Flux Curing of Coatings and Laminates
Eugene Sitzmann, Ciba Corporation
Higher safety and improved efficiency are two critical goals that drive the development of many of the new light curing applications. To address these needs, traditional higher energy and highly focused mercury lamps are being replaced by unfocussed UVA and/or visible light. By choosing to use lower energy sources for photocuring, a number of new problems potentially arise, such as lower mar resistance (due to oxygen inhibition at the surface) or lower adhesion (due to lower through-cure). In this paper we describe how the adaptation of lower energy light sources can be done without sacrificing efficiency and quality, by optimizing the photoinitiator package and/or resin system. In many cases the low energy approach can be very attractive, since safety, ease of implementation, and lower costs are seen.
P 2.5
Flame-retardant Surface Coating of PET using UV-curable Phosphorous-containing Methacrylates
Jianho Jang*, G.H. Koo, Y. Jeong; Kumoh National Institute of Technology
Flame retardant coaitng of PET fabric was carried out via photopolymerization of three phosphate-containing methacrylates and ammonium polyphosphate(APP). Coating efficiency increased with increasing functionality of the methacrylate monomers which located on the fabric. The APP addition increased the flame retardancy with slight decrease in fixation. The Flame retardancy up to a LOI of 25.9 was achieved by the UV coating of MMEP alone. The UV coating of MMEP with 25%(owm) of APP addition showed the highest LOI value of 28.5. The obtained flame retardancy of UV-coated PET fabrics with the phosphorous-containing methacrylates may result from a condensed phase mechanism as indicated by lowered thermal decomposition temperatures and higher carbonaceous char content, which reduces the generation of flammable materials by changing the pyrolysis path of PET.
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