US4196001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistatic layer for photographic elements
Assignee: Eastman Kodak Co
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Filing: 1975-04-16
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Granted: 1980-04-01
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Expires: 1995-04-16
Abstract
Abstract Photographic elements are protected against the adverse effects resulting from accumulation of static electrical charges by incorporating in the element an antistatic layer formed from an aqueous coating composition containing a water-soluble film-forming polymeric anionic polyelectrolyte in free acid form, a water-soluble film-forming cross-linkage polymeric binder, and an acid-acting cross-linking agent for the polymeric binder. The antistatic layer is useful with both photographic films and photographic papers employed in black-and-white photography or in color photography and will function as an effective anticurl layer as well as providing excellent protection against static. It is durable, abrasion resistant, non-tacky and highly resistant to the aqueous processing baths employed in photographic processing.
Inventors
- 👤 Douglas C. Joseph
- 👤 Ronald L. Hartman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:03
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; G03C1/79; G03C1/85; G03C1/89; Y; Y10; Y10S; Y10S428/00; Y10S428/90
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
108 words
A photographic element comprising: (1) a support; (2) at least one radiation-sensitive image-forming layer; and (3) an antistatic layer coated on said support which is durable, abrasion-resistant, non-tacky and resistant to leaching by aqueous processing baths employed in photographic processing; said antistatic layer having been formed by coating a liquid coating composition and drying the coating, said liquid coating composition comprising: (a) a water-soluble film-forming polymeric anionic polyelectrolyte in free acid form; (b) a water-soluble film-forming cross-linkable polyvinyl alcohol binder that reacts chemically with said polyelectrolyte during drying of said coating; and (c) an acid-acting cross-linking agent that cross-links said polyvinyl alcohol binder during drying of said coating.
Claim 2
Dependent Claim
108 words
A photographic element comprising: (1) a support; (2) at least one radiation-sensitive image-forming layer; and (3) an antistatic layer coated on said support which is durable, abrasion-resistant, non-tacky and resistant to leaching by aqueous processing baths employed in photographic processing; said antistatic layer having been formed by coating a liquid coating composition and drying the coating, said liquid coating composition comprising: (a) a water-soluble film-forming polymeric anionic polyelectrolyte in free acid form; (b) a water-soluble film-forming cross-linkable polyvinyl alcohol binder that reacts chemically with said polyelectrolyte during drying of said coating; and (c) an acid-acting cross-linking agent that cross-links said polyvinyl alcohol binder during drying of said coating.
Claim 3
Dependent Claim
12 words
A photographic element of claim 1 wherein said support is polyethylene-coated paper.
Claim 4
Dependent Claim
14 words
A photographic element of claim 1 wherein said polyelectrolyte is a polymeric sulfonic acid.
Claim 5
Dependent Claim
13 words
A photographic element of claim 1 wherein said polyelectrolyte is polystyrene sulfonic acid.
Claim 6
Dependent Claim
13 words
A photographic element of claim 1 wherein said polyelectrolyte is polyvinyl sulfonic acid.
Claim 7
Dependent Claim
15 words
A photographic element of claim 1 wherein said liquid coating composition additionally comprises hydrogen peroxide.
Claim 8
Dependent Claim
122 words
A photographic element comprising: (1) a support composed of paper coated on both sides with polyethylene; (2) at least one radiation-sensitive image-forming layer on one side of said support; and (3) an antistatic layer on the opposite side of said support which is durable, abrasion-resistant, non-tacky and resistant to leaching by aqueous processing baths employed in photographic processing; said antistatic layer having been formed by coating a liquid coating composition and drying the coating, said liquid coating composition comprising: (a) a polymeric sulfonic acid; (b) a water-soluble film-forming cross-linkable polyvinyl alcohol binder that reacts chemically with said polymeric sulfonic acid during drying of said coating; and (c) an acid-acting cross-linking agent that cross-links said polyvinyl alcohol binder during drying of said coating.
Claim 9
Dependent Claim
122 words
A photographic element comprising: (1) a support composed of paper coated on both sides with polyethylene; (2) at least one radiation-sensitive image-forming layer on one side of said support; and (3) an antistatic layer on the opposite side of said support which is durable, abrasion-resistant, non-tacky and resistant to leaching by aqueous processing baths employed in photographic processing; said antistatic layer having been formed by coating a liquid coating composition and drying the coating, said liquid coating composition comprising: (a) a polymeric sulfonic acid; (b) a water-soluble film-forming cross-linkable polyvinyl alcohol binder that reacts chemically with said polymeric sulfonic acid during drying of said coating; and (c) an acid-acting cross-linking agent that cross-links said polyvinyl alcohol binder during drying of said coating.
Claim 10
Dependent Claim
147 words
A photographic element comprising: (1) a support composed of paper coated on both sides with polyethylene; (2) at least one radiation-sensitive image-forming layer containing a silver halide developing agent on one side of said support; and (3) an antistatic layer on the opposite side of said support which is durable, abrasion-resistant, non-tacky and resistant to leaching by aqueous processing baths employed in photographic processing; said antistatic layer having been formed by coating a liquid coating composition and drying the coating, said liquid coating composition comprising: (a) polystyrene sulfonic acid; (b) a water-soluble film-forming cross-linkable polyvinyl alcohol binder that reacts chemically with said polystyrene sulfonic acid during drying of said coating; (c) an acid-acting cross-linking agent that cross-links said polyvinyl alcohol binder during drying of said coating; and (d) at least one antistaining agent selected from the group consisting of ammonium hydroxide, alkali metal hydroxides and stannous halides.
Claim 11
Dependent Claim
147 words
A photographic element comprising: (1) a support composed of paper coated on both sides with polyethylene; (2) at least one radiation-sensitive image-forming layer containing a silver halide developing agent on one side of said support; and (3) an antistatic layer on the opposite side of said support which is durable, abrasion-resistant, non-tacky and resistant to leaching by aqueous processing baths employed in photographic processing; said antistatic layer having been formed by coating a liquid coating composition and drying the coating, said liquid coating composition comprising: (a) polystyrene sulfonic acid; (b) a water-soluble film-forming cross-linkable polyvinyl alcohol binder that reacts chemically with said polystyrene sulfonic acid during drying of said coating; (c) an acid-acting cross-linking agent that cross-links said polyvinyl alcohol binder during drying of said coating; and (d) at least one antistaining agent selected from the group consisting of ammonium hydroxide, alkali metal hydroxides and stannous halides.
Claim 12
Dependent Claim
130 words
A photographic element comprising: (1) a support composed of paper coated on both sides with polyethylene; (2) at least one radiation-sensitive image-forming layer containing a silver halide developing agent on one side of said support; and (3) an antistatic layer on the opposite side of said support which is durable, abrasion-resistant, non-tacky and resistant to leaching by aqueous processing baths employed in photographic processing; said antistatic layer having been formed by coating a liquid coating composition and drying the coating, said liquid coating composition comprising: (a) polystyrene sulfonic acid; (b) a water-soluble film-forming cross-linkable polyvinyl alcohol binder that reacts chemically with said polystyrene sulfonic acid during drying of said coating; (c) an acid-acting cross-linking agent that cross-links said polyvinyl alcohol binder during drying of said coating; and (d) hydrogen peroxide.
Claim 13
Dependent Claim
130 words
A photographic element comprising: (1) a support composed of paper coated on both sides with polyethylene; (2) at least one radiation-sensitive image-forming layer containing a silver halide developing agent on one side of said support; and (3) an antistatic layer on the opposite side of said support which is durable, abrasion-resistant, non-tacky and resistant to leaching by aqueous processing baths employed in photographic processing; said antistatic layer having been formed by coating a liquid coating composition and drying the coating, said liquid coating composition comprising: (a) polystyrene sulfonic acid; (b) a water-soluble film-forming cross-linkable polyvinyl alcohol binder that reacts chemically with said polystyrene sulfonic acid during drying of said coating; (c) an acid-acting cross-linking agent that cross-links said polyvinyl alcohol binder during drying of said coating; and (d) hydrogen peroxide.
Claim 14
Dependent Claim
96 words
A photographic base comprising a support coated with an antistatic layer which is durable, abrasion-resistant, non-tacky and resistant to leaching by aqueous processing baths employed in photographic processing; said antistatic layer having been formed by coating a liquid coating composition and drying the coating, said liquid coating composition comprising: (a) a water-soluble film-forming polymeric anionic polyelectrolyte in free acid form; (b) a water-soluble film-forming cross-linkable polyvinyl alcohol binder that reacts chemically with said polyelectrolyte during drying of said coating; and (c) an acid-acting cross-linking agent that cross-links said polyvinyl alcohol binder during drying of said coating.
Claim 15
Dependent Claim
96 words
A photographic base comprising a support coated with an antistatic layer which is durable, abrasion-resistant, non-tacky and resistant to leaching by aqueous processing baths employed in photographic processing; said antistatic layer having been formed by coating a liquid coating composition and drying the coating, said liquid coating composition comprising: (a) a water-soluble film-forming polymeric anionic polyelectrolyte in free acid form; (b) a water-soluble film-forming cross-linkable polyvinyl alcohol binder that reacts chemically with said polyelectrolyte during drying of said coating; and (c) an acid-acting cross-linking agent that cross-links said polyvinyl alcohol binder during drying of said coating.
Claim 16
Dependent Claim
14 words
A photographic base of claim 10 wherein said support is a photographic film support.
Claim 17
Dependent Claim
14 words
A photographic base of claim 10 wherein said support is a photographic paper support.
Claim 18
Dependent Claim
13 words
A photographic base of claim 10 wherein said support is a polyester film.
Claim 19
Dependent Claim
13 words
A photographic base of claim 10 wherein said support is a polyolefin-coated paper.
Claim 20
Dependent Claim
18 words
A photographic base of claim 10 wherein said support is paper coated on both sides thereof with polyethylene.
Claim 21
Dependent Claim
19 words
A photographic base of claim 10 wherein said polyelectrolyte is polystyrene sulfonic acid and said cross-linking agent is glyoxal.
Claim 22
Dependent Claim
15 words
A photographic base of claim 10 wherein said liquid coating composition additionally comprises hydrogen peroxide.
Claim 23
Dependent Claim
70 words
A coating composition for use in forming an antistatic layer in a photographic element, said composition comprising an aqueous solution of: (1) a water-soluble film-forming polymeric anionic polyelectrolyte in free acid form; (2) a water-soluble film-forming cross-linkable polyvinyl alcohol binder that reacts chemically with said polyelectrolyte during drying of said coating composition; and (3) an acid-acting cross-linking agent that cross-links said polyvinyl alcohol binder during drying of said coating composition.
Claim 24
Dependent Claim
70 words
A coating composition for use in forming an antistatic layer in a photographic element, said composition comprising an aqueous solution of: (1) a water-soluble film-forming polymeric anionic polyelectrolyte in free acid form; (2) a water-soluble film-forming cross-linkable polyvinyl alcohol binder that reacts chemically with said polyelectrolyte during drying of said coating composition; and (3) an acid-acting cross-linking agent that cross-links said polyvinyl alcohol binder during drying of said coating composition.
Claim 25
Dependent Claim
19 words
A coating composition of claim 18 wherein said polyelectrolyte is polystyrene sulfonic acid and said cross-linking agent is glyoxal.
Claim 26
Dependent Claim
13 words
A coating composition of claim 18 additionally containing ammonium hydroxide and stannous chloride.
Claim 27
Dependent Claim
10 words
A coating composition of claim 18 additionally containing hydrogen peroxide.
Claim 28
Dependent Claim
43 words
A coating composition for use in forming an antistatic layer in a photographic element, said composition comprising: (1) polystyrene sulfonic acid; (2) polyvinyl alcohol; (3) glyoxal; (4) colloidal silica; (5) ammonium hydroxide or an alkali metal hydroxide; (6) hydrogen peroxide; and (7) water.
Claim 29
Dependent Claim
43 words
A coating composition for use in forming an antistatic layer in a photographic element, said composition comprising: (1) polystyrene sulfonic acid; (2) polyvinyl alcohol; (3) glyoxal; (4) colloidal silica; (5) ammonium hydroxide or an alkali metal hydroxide; (6) hydrogen peroxide; and (7) water.
Claim 30
Independent Claim
82 words
A method of providing antistatic protection for a photographic element, which comprises coating a surface of said element with an antistatic coating composition and drying the coating, said antistatic coating composition comprising an aqueous solution of: (1) a water-soluble film-forming polymeric anionic polyelectrolyte in free acid form; (2) a water-soluble film-forming cross-linkable polyvinyl alcohol binder that reacts chemically with said polyelectrolyte during drying said coating; and (3) an acid-acting cross-linking agent that cross-links said polyvinyl alcohol binder during drying of said coating.
Claim 31
Independent Claim
82 words
A method of providing antistatic protection for a photographic element, which comprises coating a surface of said element with an antistatic coating composition and drying the coating, said antistatic coating composition comprising an aqueous solution of: (1) a water-soluble film-forming polymeric anionic polyelectrolyte in free acid form; (2) a water-soluble film-forming cross-linkable polyvinyl alcohol binder that reacts chemically with said polyelectrolyte during drying said coating; and (3) an acid-acting cross-linking agent that cross-links said polyvinyl alcohol binder during drying of said coating.
Claim 32
Dependent Claim
13 words
A method of claim 23 wherein said polyelectrolyte is a polymeric sulfonic acid.
Claim 33
Dependent Claim
18 words
A method of claim 23 wherein said polyelectrolyte is polystyrene sulfonic acid and said cross-linking agent is glyoxal.
Claim 34
Dependent Claim
14 words
A method of claim 25 wherein said antistatic coating composition additionally contains colloidal silica.
Claim 35
Dependent Claim
31 words
A method of claim 25 wherein said antistatic coating composition additionally contains at least one antistaining agent selected from the group consisting of ammonium hydroxide, alkali metal hydroxides and stannous halides.
Claim 36
Dependent Claim
17 words
A method of claim 25 wherein said antistatic coating composition additionally contains ammonium hydroxide and stannous chloride.
Claim 37
Dependent Claim
14 words
A method of claim 25 wherein said antistatic coating composition additionally contains hydrogen peroxide.
Claim 38
Dependent Claim
17 words
A method of claim 25 wherein said antistatic coating composition additionally contains ammonium hydroxide and hydrogen peroxide.
References Cited (Backward Citations)
US2725297A
Cited
US3437484A
Cited
US3552972A
Cited
US3574682A
Cited
US3786002A
Cited
US3769020A
Cited
US3793029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |