High-Throughput Adhesion Evaluation and Scale-up of Combinatorial Leads of Organic Protective Coatings
- PDF / 3,523,274 Bytes
- 8 Pages / 612 x 792 pts (letter) Page_size
- 79 Downloads / 194 Views
JJ4.7.1
High-Throughput Adhesion Evaluation and Scale-up of Combinatorial Leads of Organic Protective Coatings Karin Ezbiansky,a) George Medford,a) and Hariklia Reitz,a) Radislav A. Potyrailo,b) Bret J. Chisholm,b) William G. Morris,b) James N. Cawse,b) William P. Flanagan,b) Lamyaa Hassib,b) Chris A. Molaisonb) a) b)
General Electric Company, GE Silicones, Waterford, New York 12188 General Electric Company, Global Research Center, Schenectady, New York 12301
ABSTRACT Coupling of combinatorial chemistry methods with high-throughput (HT) performance testing and measurements of resulting properties has provided a powerful set of tools for the 10fold accelerated discovery of new high-performance coating materials for automotive applications. This approach replaces labor-intensive steps with automated systems for evaluation of adhesion of 8 x 6 arrays of coating elements that are discretely deposited on a single 9 x 12 cm plastic substrate. Performance of coatings is evaluated with respect to their resistance to adhesion loss. This parameter is one primary consideration in end-use automotive applications. Coating leads identified from the HT screening have been validated on the traditional scale. Details of these validation studies are discussed. INTRODUCTION An important aspect of combinatorial materials research is the correlation of HT with traditional scale results that are well accepted in industrial applications. Often these traditional testing methods have extensive historical databases of the performance of materials. Thus, they serve as a valuable source for correlation studies on the performance of combinatorial and conventional scale systems. In the development of organic coatings for automotive applications using combinatorial chemistry methodology [1,2], it is important to find the performance testing methods and measurement techniques that in concert provide results that correlate well with the more conventional test and measurement methods. Our interest in the combinatorial coatings development for automotive applications lies in the discovery of materials with improved abrasion resistance, weathering performance, and adhesion [1]. This paper specifically focuses on improved adhesion. The development process for producing new organic coatings typically requires extensive experimentation. This is a consequence of the complexity of most coating systems resulting from the wide array of properties that must be imparted to the material. Even relatively subtle changes in property requirements may require screening of many coating compositions since coating components are typically highly interactive resulting in complex, nonlinear structureproperty relationships. Due to these facts, the application of combinatorial methods to organic coating development appeared to be very useful [3,4]. We have demonstrated the successful implementation of the full combinatorial process for the development of organic clear coatings for plastic substrates [1,2,5-14]. This paper will detail the key aspects of the scale-up proc
Data Loading...
