Authors: Jie He Bret J Chisholm Bret A Mayo Hanzhen Bao Jared Risan David A Christianson Crystal L Rafferty
Publish Date: 2012/01/14
Volume: 9, Issue: 4, Pages: 423-431
Abstract
A coating precursor containing both acrylate functionality and trimethoxysilane functionality was produced by reacting bisphenolA glycerolate diacrylate with 3isocyanatopropyltimethoxysilane With this precursor two different crosslinked networks can be produced A polyacrylate network can be produced using a radiationcure mechanism while a polysiloxane network can be produced by hydrolysis and condensation reactions involving the trimethoxysilane groups The objective of the study was to determine the utility of this dualcure system for generating rapidcure coatings for corrosion protection Coating properties were determined as a function of cure conditions The results of the study showed that the formation of siloxane crosslinks was significantly hindered by the crosslinked network induced by the UVcuring process Even though the overall conversion of trimethoxysilane groups to siloxane crosslinks was relatively low coating barrier properties were significantly enhanced and coating free volume reduced At ambient conditions additional crosslinking occurring through siloxane bond formation increased within the first 4 days after UVcuring Beyond this period siloxane bond formation remained unchanged as did coating properties
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