TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The liquid epoxy compound is non-glycidyl epoxy compound selected from bis(2,3-epoxycyclopentyl)ether, 1,2-bis(2,3-epoxycyclopentyloxy)ethane, 3,4-epoxycyclohexyl-methyl 3,4-epoxycyclohexanecarboxylate, 3,4-epoxy-6-methyl-cyclohexylmethyl 3,4-epoxy-6-methylcyclohexanecarboxylate, di(3,4-epoxycyclohexylmethyl)hexanedioate, di(3,4-epoxy-6-methylcyclohexylmethyl)hexanedioate, ethylenebis(3,4- epoxycyclohexanecarboxylate, ethanediol di(3,4-epoxycyclohexylmethyl)ether, vinylcyclohexene dioxide, dicyclopentadiene diepoxide or 2-(3,4-epoxycyclohexyl-5,5-spiro-3,4-epoxy)cyclohexane-1,3-dioxane, and 2,2'-bis-(3,4-epoxy-cyclohexyl)-propane.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The difunctional benzoxazine is compound of formula (II). The monofunctional benzoxazine is compound of formula (III). The toughening agent is diallyl bisphenol A-terminated polyurethane. The advanced liquid epoxy resin further comprises phenol catalyst.Ra=1-20C alkylene, 6-20C arylene or 2-20C heteroarylene (all optionally substituted), direct bond or C=O;Rb=1-20C alkyl, 2-20C alkenyl, 6-20C aryl, 2-20C heteroaryl, 4-20C carbocyclic, 2-20C heterocyclic (all optionally substituted), H or 3-10C cycloalkyl;Rc=1-20C alkyl, 2-20C alkenyl, 6-20C aryl, 2-20C heteroaryl, 4-20C carbocyclic, 2-20C heterocyclic (all optionally substituted), H or 3-10C cycloalkyl.Preferred Method: The method (M1) further involves mixing into the composition phenol catalyst (0.001-15 parts by weight). EXAMPLE - A resin composition comprising (parts by weight) liquid epoxy compound (13.5), monofunctional benzoxazine (41.1), difunctional benzoxazine (22.2), diallyl bisphenol A-terminated polyurethane (11.4), thixotropic filler (1), silane coupling agent (0.8), and atomized metal (10) was prepared. A comparative resin composition comprising (parts by weight) liquid epoxy compound (13.5), monofunctional benzoxazine (41.1), difunctional benzoxazine (22.2), Jeffol AD 500 (RTM: polyol) (11.4), thixotropic filler (1), silane coupling agent (0.8), and atomized metal (10) was prepared. The test/composition comparative resin showed lap shear strength (cure 2 hours at 200 degrees C, test at 25 degrees C) of 4199/1726 psi.