Document Type


Patent Number

US Patent 8,993,042

Patent agency

United States Patent and Trademark Office

Publication Date



Toyota Motor Engineering & Manufacturing North America, Inc. (Erlanger, KY, US) ; University of Iowa Research Foundation (Iowa City, IA, US)

Application Number


Date Filed


Total Pages

41 pages


A method to evaluate, determine and optimize production parameters for a coating application of a UV cationic polymerizable coating system to a substrate is provided. The method is based on a simulation model which includes both shadow and dark cure processes. Both of an active center generation process and the active center diffusion process are mathematically described. In the model, the two processes are considered separately since they are driven by different fundamental phenomena and occur on different timescales. Evaluation or prediction of the effect of process variables on the curing of a cationic coating of a complex substrate according to the described method allows characterization and understanding of process variables which may save set-up costs and improve production efficiency.

Creative Commons License

Creative Commons License
This work has been identified with a Creative Commons Public Domain Mark 1.0.