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Development of light‐stable PVC stabilizer systems for rigid weatherable applications
Author(s) -
Ho Ben Y. K.
Publication year - 1984
Publication title -
journal of vinyl technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 0193-7197
DOI - 10.1002/vnl.730060408
Subject(s) - stabilizer (aeronautics) , polyvinyl chloride , commercialization , biochemical engineering , chemistry , materials science , chemical engineering , organic chemistry , engineering , mechanical engineering , political science , law
There are technical, as well as economical, advantages to employ light‐stable polyvinyl chloride heat stabilizers for rigid weatherable applications. The desirable stabilizer systems should also be less or non‐toxic, without sulfur staining problem, with acceptable odor, with stable and competitive economics. Our research effort has been targeted towards worldwide applicability. Our earliest effort was to search for an active metal from the periodic table! Considerations were given to the fate of the metal chlorides formed in the PVC resin. Preliminary compounds were synthesized for screening. Subsequently, organic ligands were designed to control and to activate the molecule in the stabilization of polyvinyl chloride. Co‐additives, mostly conventional, were added to form stabilizer packages. Accelerated indoor light‐stability tests demonstrated the desired light‐stability against current stabilizer systems. Preliminary outdoor weathering data further supported the conclusion. The primary stabilizer has the following general structure:\documentclass{article}\pagestyle{empty}\begin{document}$${\rm (controlling ligand)}-{\rm (divalent metal)}-{\rm (activating ligand)}$$\end{document} The chemistry and stabilization mechanism will be discussed. The above patent pending technical innovation is revealed as a contribution of our research effort to the Vinyl Industry. The eventual product commercialization will be of interest to all, especially those involved in the rigid weatherable applications.