Synthesis, Characterization, and Performance Evaluation of Novel Stabilized TDI-Based Polyurethane Coatings Under Accelerated Weathering

Some toluene diisocyanate (TDI)-based polyurethane resins (PURs) for coating applications were synthesized with castor oil and their performance was estimated under accelerated UV weathering with and without a novel UV absorber. Changes in physical properties, chemical structure, and color of the sa...

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Bibliographic Details
Published in:Journal of vinyl & additive technology 2005-03, Vol.11 (1), p.13-20
Main Authors: Kumar, A Pratheep, Reddy, K Raghunatha, Rana, Sravendra, Lonkar, Sunil P, Raut, K G, Singh, Raj Pal
Format: Article
Language:English
Online Access:Get full text
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Summary:Some toluene diisocyanate (TDI)-based polyurethane resins (PURs) for coating applications were synthesized with castor oil and their performance was estimated under accelerated UV weathering with and without a novel UV absorber. Changes in physical properties, chemical structure, and color of the samples were monitored by mechanical property testing, FTIR spectroscopy, and colorimetry, respectively. A stable polyurethane coating was achieved at 0.5% concentration of additive in the host matrix. Mechanical properties were also retained as in the pristine PUR after mixing. Commercial Tinuvin P and benzotriazole-based novel UV absorbers were found to improve the photoresistance of the PUR coating, and the highest efficiency of the novel UV absorber against weathering was estimated at 0.5 wt% concentration.
ISSN:1083-5601
DOI:10.1002/vn1.20032