| 摘要 |
A radiographic screen comprising (1) a metal or hydrophobic resin support, (2) a layer comprising a fluorescent phosphor dispersed in an organic polymeric binder and (3) an optionally present outermost organic polymer coating protecting said phosphor layer against abrasion, characterised in that the edges (side surfaces) of said screen are covered with a polymer material being formed essentially from a moisture-hardened polymer composition prepared by a process comprising the steps of : (I) mixing in at least one solvent following components (A) and (B) : (A) 30 to 99 parts by weight of at least one copolymer of olefinically unsaturated compounds having a weight-average molecular weight [Mw] of at least 1500 and containing chemically incorporated moieties capable of undergoing an addition reaction with amino groups, and (B) 1 to 70 parts by weight of organic substances containing blocked amino groups which are capable of forming under the influence of moisture free primary and/or secondary amino groups, wherein (i) the copolymers of component (A) contain intramolecularly bound carboxylic anhydride moieties, with the anhydride equivalent weight of the copolymers being from 393 to 9,800, and the still unhardened composition contains from 0.25 to 10 anhydride moieties for each blocked amino group, II) coating the obtained mixture onto at least one side surface (edge) of said fluorescent screen, and (III) allowing moisture (H2O) to come into contact with the coated mixture essentially consisting of the above defined components (A) and (B).
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