Modification of Poly(vinyl butyral) Coatings Using Bis-silanes (Postprint)
UNIVERSAL TECHNOLOGY CORP DAYTON OH
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A commercially available polyvinyl butyral PVB coating was modified using a combination of 1-10 wt. bistrimethoxysilylethylbenzene and dibutyltin dilaurate as the hydrolysis catalyst. Results of attenuated total reflectance ATR-FTIR analysis indicated the modification resulted in a hybrid coating material containing silicate moieties covalently bonded to the PVB polymer chains. Gravimetric analysis indicted the bis-silane addition resulted in a reduction in the diffusion coefficient of the parent coating to 2-chloroethyl ethyl sulfide 2-CEES, dimethyl methylphosphonate DMMP, diisopropyl methylphosphonate, and methyl salicylate the most significant reduction was observed for 2-CEES and DMMP at temperatures greater than or equal to 50 deg C. Glass transition temperature, abrasion resistance, tensile strength, and coating hardness were increased upon incorporation of the bis-silane. Despite incorporation of an inorganic component, coating flexibility was retained at low temperature -15 deg C.
- Coatings, Colorants and Finishes