Preparation and Application of Polyurethane Coating Material Based on Epoxycyclohexane-Tetrahydrofuran in Paper Conservation

Paper cultural heritages are valuable historical records and also abound in resources. Due to its organic property, paper is susceptible aging, destruction by environmental pollution human factors. At present, many countries the world facing problem of conservation. Coating reinforcement one methods for conservation, which choice reinforcing resin key. A transparent polyurethane, based on epoxycyclohexane (CHO)-tetrahydrofuran (THF) copolyether, was adopted this study. The ring-opening polymerization generating CHO-THF copolyether took place reactants CHO THF, catalysis boron trifluoride diethyl etherate, initiation glycerol. Characterizations synthetic were conducted infrared (IR) spectroscopy proton nuclear magnetic resonance (1HNMR) spectroscopy. polyurethane then produced hexamethylene diisocyanate (HDI) trimer. influences different concentrations solution upon tensile strength, elongation, folding endurance, tearing gloss, brightness studied. These findings suggest that 10% optimal, not only greatly improving performance, but keeping with principle “repair as old”. applied results demonstrate has characteristics along displaying good mechanical properties reinforcement.