Photographic element having a fire-retardant protective overcoat

Compositions: coating or plastic – Coating or plastic compositions – Contains fireproofing or biocidal agent

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Details

106 1811, 106 1814, 106 1815, 106 1816, 106 1818, 252609, 428480, 524416, C09K 2104

Patent

active

050340573

ABSTRACT:
A photographic element is provided on one or both surfaces thereof with a fire-retardant protective overcoat comprising (1) a water-soluble film-forming copolymer of methyl inyl ether and maleic anhydride cross-linked by a water-soluble polyhydric alcohol and (2) a water-soluble ammonium polyphosphate which reacts with the polyhydric alcohol to form a fire-retardant composition when the protective overcoat is exposed to the heat of a fire. The protective overcoat is transparent, colorless, durable, non-tacky and moisutre resistant and provides especially effective fire-retarding properties for photographic products used in large display format such as back-drops on movie sets or free-hanging murals at trade shows.

REFERENCES:
patent: 3345289 (1967-10-01), Freifeld et al.
patent: 3513114 (1970-05-01), Hahn et al.
patent: 3562197 (1971-02-01), Sears et al.
patent: 3955987 (1976-05-01), Schaar et al.
patent: 4009137 (1977-02-01), Dany et al.
patent: 4247435 (1981-01-01), Kasten
patent: 4588510 (1986-05-01), Salyer et al.

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