# US 5,700,577 A · Molecular grafting to energetically treated polyesters to promote adhesion of gelatin-containing layers

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,700,577 A
- Document ID: US5700577A
- Status: Granted
- Kind: A
- Application number: 08/638,900
- Filed: 1996-04-24
- Granted: 1997-12-23
- Earliest claimed: 1995-04-03
- Assignees: Eastman Kodak Company
- Inventors: Jeremy Grace; Louis J. Gerenser; Janglin Chen; Edgar E. Riecke
- Web page: https://patentgrep.com/patent/US5700577A

## CPC

- G03C 1/91: characterised by subbing layers or subbing means
- G03C 1/915: {using mechanical or physical means therefor, e.g. corona}
- G03C 1/7954: {Polyesters}
- Y10S 430/136: Coating process making radiation sensitive element
- Y10S 430/138: Corona discharge process
- Y10S 430/143: Electron beam
- Y10T 428/31536: Including interfacial reaction product of adjacent layers
- Y10T 428/31786: Of polyester [e.g., alkyd, etc.]
- G03C: PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES (for photomechanical purposes G03F); PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY (photographic processes characterised by the use or manipulation of apparatus classifiable per se in subclass G03B, see G03B; photomechanical production of textured or patterned surfaces G03F; electrophotography, magnetography G03G)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present invention is a biaxially oriented polyester film support in which the surface has been subjected to an energetic treatment to produce amine groups on the polyester surface. The treated surface is then coated with a dilute amine reactive hardener solution. After drying the hardener solution a photographic emulsion is coated to the surface. The resulting film element has better adhesion of the photographic emulsion after photoprocessing than previous known methods.

## Claims

### Claim 1

A film base comprising:
a polyester substrate having a surface exposed to an energetic treatment producing amine groups on the surface;
a coating of amine reactive hardener selected from the group consisting of 1,2-bis(vinylsulfonylacetamido)ethane, bis(vinylsulfonyl)methane, bis(vinylsulfonylmethyl)ether, bis(vinylsulfonylethyl)ether, 1,3-bis(vinylsulfonyl)propane, 1,3-bis(vinylsulfonyl)-2-hydroxypropane, 1,1-bis(vinylsulfonyl)ethylbenzenesulfonate sodium salt, 1,1,1-tris(vinylsulfonyl)ethane, tetrakis(vinylsulfonyl)methane, tris(acrylamido)hexahydro-s-triazine, copoly(acrolein-methacrylic acid), glycidyl ethers, acrylamides, dialdehydes, blocked dialdehydes, .alpha.-diketones, amine-reactive esters, sulfonate esters, amine-reactive halogenated compounds, s-triazines, diazines, epoxides, formaldehydes, formaldehyde condensation products, anhydrides, aziridines, amine-reactive olefins, blocked amine-reactive olefins, polymeric hardeners selected from the group consisting of polymeric aldehydes, polymeric vinylsulfones, polymeric blocked vinyl sulfones and amine-reactive halogenated polymers grafted to the surface.

### Claim 2 (depends on 1)

The film base according to claim 1 wherein the substrate comprises polyethylene naphthalate.

### Claim 3 (depends on 1)

The film base according to claim 1 wherein the substrate comprises polyethlene terephthalate.

### Claim 4 (depends on 1)

The film base according to claim 1 wherein the energetic treatment comprises a nitrogen plasma.