Preferred resins include epoxidized phenol novolac resins, epoxidized cresol novolac resins, polybutadiene, polyisoprene, polymers comprising repeating units of the formula: [0075] wherein P and M may be the same or different alkenes having from 2 to about 6 carbons, such as poly(diallyl phthalate), and combinations comprising at least one of the foregoing resins.