Ion exchange resins are polymers, are they therefore exempt from the REACH registration?

The manufacturer or importer of a copolymer will need to register the monomer(s), or any other substance chemically bound to the polymer at 2%w/w or greater, unless these substances have already been registered by the supplier or another actor up the supply chain. One exception is non-isolated intermediates, which are exempt from registration. (Ref.: Article 2 of REACH).