Coating composition for photographic materials
AssigneeEastman Kodak Company
InventorsAlice G. Moon, Mark P. Pavlik, Michael W. Orem
Life of this patent
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Abstract
A coating composition for use in a photographic element, the composition comprising an aqueous solution of: two or more surfactants; a hydrophilic binder; and optional matte particles; wherein one of the surfactants is represented by the following Formula (I): Rf—CH2CH2—(B)y-A (I) where Rf is F(CF2CF2)n— and n is 3 and 4 or 3, 4, and 5, and the fraction of all Rf with n=3 is at least 40%; B is a divalent linking group; y is 0 or 1; and A is an anionic group with a counterion or an amphoteric group. A photographic element containing the coating composition is also disclosed.
Claims19
A coating composition for use in forming an overcoat layer in a photographic element, said composition comprising an aqueous solution of:
- two or more surfactants, where only one of the surfactants is fluorinated;
- a hydrophilic binder;
- and
- matte particles;
- wherein the only one fluorinated surfactant is represented by the following Formula (I):
- Rf—CH2CH2—(B)y-A (I)
- where Rf is F(CF2CF2)n— and n is 3 and 4 or 3, 4, and 5, and the fraction of all Rf with n=3 is at least 40%;
- B is a divalent linking group;
- y is 0 or 1;
- and
- A is an anionic sulfonate group with a counterion or an amphoteric betaine group.
A coating composition for use in a photographic element, said composition comprising an aqueous solution of:
- two or more surfactants, where only one of the surfactants is fluorinated;
- and
- a hydrophilic binder;
- wherein the only one fluorinated surfactant is represented by the following Formula (I):
- Rf—CH2CH2—(B)y-A (I)
- where Rf is F(CF2CF2)n— and n is 3 and 4 or 3, 4, and 5, and the fraction of all Rf with n=3 is at least 40%;
- B is a divalent linking group;
- y is 0 or 1;
- and
- A is an anionic sulfonate group with a counterion or an amphoteric betaine group.
A photographic element comprising:
- a) a support;
- b) at least one image-forming layer;
- and
- c) an overcoat layer comprising:
- i) two or more surfactants, where only one of the surfactants is fluorinated;
- ii) a hydrophilic binder;
- and
- iii) matte particles;
- wherein the only one fluorinated surfactant is represented by the following Formula (I):
- Rf—CH2CH2—(B)y-A (I)
- where Rf is F(CF2CF2)n— and n is 3 and 4 or 3, 4, and 5, and the fraction of all Rf with n=3 is at least 40%;
- B is a divalent linking group;
- y is 0 or 1;
- and
- A is an anionic sulfonate group with a counterion or an amphoteric betaine group.
A photographic element comprising:
- a) a support;
- b) at least one image-forming layer;
- and
- c) at least two surfactants, where only one of the surfactants is fluorinated;
- wherein the only one fluorinated surfactant is represented by the following Formula (I):
- Rf—CH2CH2—(B)y-A (I)
- where Rf is F(CF2CF2)n— and n is 3 and 4 or 3, 4, and 5, and the fraction of all Rf with n=3 is at least 40%;
- B is a divalent linking group;
- y is 0 or 1;
- and
- A is an anionic sulfonate group with a counterion or an amphoteric betaine group.
A method of providing control of static charge for a photographic element, the method comprising the steps of providing a photographic element, coating its outermost layer with a fluorinated surfactant coating composition and drying said coating, said coating composition comprising:
- i) a mixture of two or more surfactants, where only one of the surfactants is fluorinated;
- ii) a hydrophilic binder;
- and
- iii) matte particles;
- wherein the only one fluorinated surfactant is represented by the following Formula (I):
- Rf—CH2CH2—(B)y-A (I)
- where Rf is F(CF2CF2)n— and n is 3 and 4 or 3, 4, and 5, and the fraction of all Rf with n=3 is at least 40%;
- B is a divalent linking group;
- y is 0 or 1;
- and
- A is an anionic sulfonate group with a counterion or an amphoteric betaine group.
Dependencies are inferred from the claim text.