Heat/press. sensitive adhesive cpds. for bonding and laminating materials, whose molecule contains identical or different units (I). (where A and B are H or organic groups optionally linked to form a ring, at least one unit bearing a functional polar group) are obtained by (co)polymerisation, with ring opening, of cpds. of the bicyclo (2,2,1)-heptene-2 or dimethano-1,4,5,8-octahydro-1,2,3,4,4a,5,8,8a-naphthalene series, of formulae (where X is a polar functional group, Y is H or a polar functional group, Y is H or a polar functional group, and R is (cyclo)alkyl or aryl),.
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