Development of Flexible Epoxy Resins and Coatings

摘要

Coatings with excellent low temperature flexibility were made by blending 20 parts polyether diepoxide DER 732 and 80 parts aromatic epoxy resin Epon 1001 and curing with polyether diamine POPDA 400. Also coatings with good flexibility at -45F, high adhesion and abrasion resistance were prepared from moisture-set polytetramethylene glycol/TDI polyurethanes. However, these coatings needed long curing times. Epon 828 cured with polyether diamine POPDA 400 and polyether triamine PPe 640TA gave coatings with good gloss and high abrasion resistance. But, the coatings had only marginal low temperature properties. Anticipated high temperature resistant coatings were not realized from oxydiphenol epoxy resins. Also, the resins had poor solubility properties. A urethane-epoxy hybrid coating was synthesized which should have low temperature flexibility of urethane polymers and the fast curing rate of epoxy resins. (Author)