prov:value
| - Preference is given to cycloolefins of the formulae I, II, III, IV, V or VI below, in which R1, R2, R3, R4, R5, R6, R7 and R8 are identical or different and are a hydrogen atom, a C6 -C20 -aryl or C1 -C20 -alkyl radical or a halogen atom, or a monocyclic olefin of the formula VII, in which n is a number from 2 to 10. ##STR1## Of the COPs described above, preference is given to those which are buil
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