Photographic films and their preparation

• US 2,698,240 A
• Filed: 05/27/1952
• Issued: 12/28/1954
• Est. Priority Date: 03/22/1950
• Status: Expired due to Term

• Current Assignee: Peter Alles Francis, Russell Saner William
• Original Assignee: Peter Alles Francis, Russell Saner William
• Inventors: PETER ALLES FRANCIS, RUSSELL SANER WILLIAM
• Application Number:
  US03/290,332
• Time in Patent Office: 945 Days
• US Class Current: 430/535
• CPC Class Codes: B29C 48/08 flexible, e.g. films
• CPC Class Codes: B29C 48/914 cooling drums
• CPC Class Codes: C08J 2367/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds; C08J2367/06 takes precedence
• CPC Class Codes: C08J 2427/08 Homopolymers or copolymers of vinylidene chloride
• CPC Class Codes: C08J 2475/10 from polyacetals
• CPC Class Codes: C08J 7/042 with two or more layers, where at least one layer of a composition contains a polymer binder
• CPC Class Codes: C08J 7/043 Improving the adhesiveness of the coatings per se, e.g. forming primers adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50
• CPC Class Codes: C08J 7/056 Forming hydrophilic coatings
• CPC Class Codes: C08L 67/00 Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain of polyester-amides C08L77/12; of polyester-imides C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: G03C 1/7954 Polyesters
• CPC Class Codes: G03C 1/93 Macromolecular substances therefor
• CPC Class Codes: G03C 7/3275 Polymers obtained by reactions involving only carbon-to-carbon unsaturated bonds, e.g. vinyl polymers

Claims

1. THE PROCESS WHICH COMPRISES COATING A WATERPERMEABLE HYDROXYL POLYMER LAYER ONTO A STRATUM COMPOSED OF A TRI-COMPONENT COPLOYMER MADE FROM 35 TO 96% OF VINYLIDENE CHLORIDE 3.5 TO 64.5% OF AN ETHYLENICALLY UNSATURATED ESTER AND 0.5 TO 25% OF ITACONIC ACID MONOMERS, ALL PERCENTAGES BEING BY WEIGHT, SAID ESTER BEING TAKEN FROM THE GROUP CONSISTING OF ALKYL ESTERS OF ACRYLIC AND METHACRYLIC ACIDS HAVING 1 TO 18 CARBON ATOMS IN THE ALKYL GROUP, ACRYONITRILE, METHACRYLONITRILE AND VINYL CHLORIDE:

SAID STRATUM BEING ON A HYDROPHOBIC FILM BASE, AND HEATING THE COATED LAYER TO A TEMPERATURE FROM 70* C. TO 150* C.