Coated film bases, photographic films derived from the bases and processes for their production
US4363872A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1981 |
| Grant date | Dec 14, 1982 |
| Priority date | — |
| Expiry date | Feb 24, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/93
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A coated film base suitable for coating with a light-sensitive photographic emulsion film 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 copolymerizable sulphonated ethylenically unsaturated comonomer having the general structure: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different and represent hydrogen, halogen, alkyl, nitrile, amide, amine, ketone, ether or vinyl; PA0 R.sub.4 represents phenylene, substituted phenylene, alkylene, carbonyl, ester, substituted ester, naphthylene, substituted naphthylene or vinylene; PA0 M represents hydrogen, ammonium, substituted ammonium or an alkali metal and is preferably lithium, potassium or sodium; PA0 m represents 1 or 0; PA0 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%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.