Poster Preview Session 6
All posters of this Preview Session to be found at Carousel 6P 6.1
Low Odor Aqueous Paint Formulations
Paul Doll, Rohm and Haas Company
Increasing environmental initiatives and consumer awareness continue to drive the world-wide architectural coatings market towards low odor paints. However, there are no standards to define what is meant by the term low-odor. The most obvious method to determine the odor of a particular paint is to smell the paint in the can. The odor of the paint in the can however, may not accurately predict the odor of the paint after application. We will present work done to determine the relationship between the in-can odor of paint and its odor persistence after application and offer suggestions for the causes of these odors. Several test methods useful to accurately determine the odor intensity of paint formulations will also be described.
P 6.2
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Dry Time and Film Thickness Dependence of Alkyd High Solids, Low VOC Coatings Performance
Cynthia J. Riddles*, Michael van de Mark ; Missouri S&T Coatings Institute
The mechanisms of alkyd curing requires the diffusion of O2 into the coating, formation of hydroperoxides, release of the anti-skinning agent and the evaporation of solvent. All aspects of the mechanism are affected by film thickness and dry time between coats of the paint and therefore have an affect on the adhesion and harness properties. A high solids, low VOC alkyd coating was prepared and tested varying the film thickness and using both single and multiple coat applications and tested by torque adhesion and pencil hardness. The alkyd was formulated with no anti-skinning aid, an oxime ASA, and also with a phenolic ASA. The results of these tests were evaluated and related to the mechanism.
P 6.3
Dual-Functional Acrylic-Epoxy Resins Lead to Improved Epoxy-Amine Coatings Systems
Gregory Turco, BASF Corporation
Customers desire high solids, isocyanate-free industrial coatings because of their perceived environmental profile. Epoxy-amine systems represent a sound alternative for low-bake, industrial applications. In this work we designed a variety of acrylic-epoxies with low molecular weight and generally low Tg. These were blended with diamine cure agents. The coatings system was optimized for physical properties and chemical resistance. Performance properties are good, and optimization for weatherability continues. It is shown that dual-functional polymeric cure agents with alcohol and oxirane functionality showed superior performance to mono-functional acrylic-epoxies displaying faster cure and less amine carbonate blushing.
P 6.4
Low VOC Concrete Coatings: Technology and Performance
Michael Praw, Alberdingk Boley, Inc.
This paper will discuss the current available technologies for concrete coatings and present low VOC technologies and options. With environmental regulations and advances in dispersion & emulsion technologies; availability of 100% solids (castor oil polyols, 2K), chemists and formulators are confronted with several and confusing choices. This study will help provide chemists and formulators with a better understanding and assessment of technology cost vs. performance balance for concrete substrates. Benefits and performance properties of the current and new technologies will be presented together with the new available options.
P 6.5
Formulation of 2K Waterborne Concrete Floor Coating to Meet New Low VOC Standards
Jennifer Rigney, Cytec Industries
Organic solvents are commonly used in 2-pack waterborne epoxy coatings such as high performance floor finishes. These solvents provide various benefits, such as facilitating proper film formation, easier mixing of parts A&B, and are thought to extend pot-life. However, due to new lower VOC limits on floor coatings enacted in certain parts of the US, the reduction or removal of organic solvents is desired. By using specific raw materials and formulation techniques, it is possible for formulate topcoats for concrete floors with VOC levels below 50 g/l while maintaining good performance properties and ease of use by contractors and do-it-yourselfers. This paper provides the newest data obtained from our lab work in pigmented coating systems and is a significant update of previously presented results on epoxy clearcoats.
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