| 摘要 |
A coated film base suitable for coating with a light-sensitive photographic emulsion layer comprises a self-supporting film of a synthetic linear polyester and a continuous subbing layer applied to at least one surface of said self-supporting film comprising a water-insoluble copolymer of a) a comonomer selected from acrylic acid, methacrylic acid or a derivative of acrylic acid or methacrylic acid and b) a copolymerisable sulphonated ethylenically unsaturated comonomer having the general structure: <CHEM> wherein R1, R2 and R3 are the same or different and represent hydrogen, halogen, alkyl, nitrile, amide, amine, ketone, ether or vinyl; R4 represents phenylene, substituted phenylene, alkylene, carbonyl, ester, substituted ester, naphthylene, substituted naphthylene or vinylene; M represents hydrogen, ammonium, substituted ammonium or an alkali metal and is preferably lithium, potassium or sodium; m represents 1 or 0; n represents an integer 1, 2 or 3 provided that n = 1 when m = 0; said comonomers a) and b) being present in the respective molar percentages in the ranges a) 26 to 99% and b) 1 to 50%. |
