| http://www.w3.org/ns/prov#value | - d that, if no benzo group is present in said hindered amine, at least one of R1, R2, R3, and R4 is an alkyl group or an electron donating group; if R3, R4 and one of R1 or R2 is hydrogen, the other of R1 or R2 is an alkyl group having at least 2 carbon atoms; and if the epoxy resin is cycloaliphatic epoxy material, at least one of R1 or R2 is lower alkyl of 1-6 carbon atoms and at least one of R3
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