Antistatic plastic articles

• US 5,370,981 A
• Filed: 03/24/1993
• Issued: 12/06/1994
• Est. Priority Date: 04/06/1992
• Status: Expired due to Term

• Current Assignee: Agfa-Gevaert N.V.
• Original Assignee: Agfa-Gevaert AG (Agfa-Gevaert N.V.)
• Inventors: Jonas, Friedrich, Quintens, Dirk, Muys, Bavo, Krafft, Werner
• Primary Examiner(s): Bowers, Jr., Charles L.
• Assistant Examiner(s): NEVILLE, THOMAS
• Application Number:
  US08/036,263
• Time in Patent Office: 622 Days
• Field of Search: 430/527, 430/529, 430/536, 430/537, 430/627, 430/628, 430/631, 428/403, 428/922, 428/409
• US Class Current: 430/529
• CPC Class Codes: C08G 61/126 with a five-membered ring containing one sulfur atom in the ring
• CPC Class Codes: C08J 2481/00 Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen, or carbon only; Polysulfones; Derivatives of such polymers
• CPC Class Codes: C08J 7/0427 with only one layer of a composition containing a polymer binder with more layers C08J7/042
• 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 7/044 Forming conductive coatings; Forming coatings having anti-static properties
• CPC Class Codes: C08J 7/046 Forming abrasion-resistant coatings; Forming surface-hardening coatings
• CPC Class Codes: G03C 1/89 Macromolecular substances therefor
• CPC Class Codes: Y10S 428/922 Static electricity metal bleed-off metallic stock
• CPC Class Codes: Y10T 428/2991 Coated
• CPC Class Codes: Y10T 428/31 Surface property or characteristic of web, sheet or block

Abstract

Antistatically treated plastic formed articles, e.g. photographic film supports, that contain at least two layers on the surface to be antistatically treated, wherein a layer nearer to the plastic surface contains a preparation of a polythiophene that is built up from structural units of the formula ##STR1## wherein R₁ and R₂ independently of each other stand for hydrogen or a C₁ -C₄ -alkyl group or together form an optionally substituted C₁ -C₄ -alkylene group, preferably a methylene group optionally substituted by alkyl groups, a 1,2-ethylene group optionally substituted by C₁ -C₁₂ -alkyl or phenyl groups, a 1,3-propylene group or a 1,2-cyclohexylene group,

and a polyanion, a farther layer contains a film-forming polymer and at least one of the two layers contains an alkoxysilane, are characterized, apart from excellent antistatic properties, by very good layer adhesion.

Claims

1. Antistatic plastic formed articles containing at least two layers on the surface of which an antistatic layer located nearer to the plastic surface contains a preparation of a polythiophene that is built up form structural units of the formula ##STR6## in which R₁ and R₂ independently of each other stand for hydrogen or a C₁ -C₄ -alkyl group or together form an optionally substituted C₁ -C₄ -alkylene group, or a 1,2-cyclohexylene group,

and a polyanion, wherein said polythiophene preparation contains solids, a protective layer located farther from the plastic surface than the antistatic layer contains a film-forming polymer and at least one of the at least two layers contains a silane of formula (II)

View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)

2. Plastic formed articles according to claim 1, characterized in that the silane has the formula ##STR8## wherein R₄ represents an alkylene group with 1 to 4 carbon atoms, and

R₆ represents a hydrogen atom or an alkyl group with 1 to 10 carbon atoms.

3. Photographic materials with a plastic base that contains on the one side at least one silver halide emulsion layer, characterized in that on the other side it contains at least two layers according to claim 1.

4. Photographic material according to claim 3, characterized in that the plastic base is a transparent cellulose triacetate or polyester film.

5. Plastic formed articles according to claim 1 wherein the total amount of the silane present in said at least one of said at least two layers is 10 to 100 wt-%, relative to the solids of the polythiophene preparation.

6. Antistatic plastic formed articles according to claim 1, wherein both said antistatic layer and said protective layer contain said silane in an amount of 1 to 300 wt-% relative to the solids of the polythiophene preparation, and at least 10 wt-% of the silane present in said at least two layers is contained in the protective layer.

7. Antistatic plastic formed articles according to claim 1, wherein at least 40 wt-% of the silane present in said at least two layers is contained in the protective layer.

8. Antistatic plastic formed articles according to claim 6, wherein at least 40 wt-% of the silane present in said at least two layers is contained in the protective layer.

9. Plastic formed articles according to claim 1, wherein R₁ and R₂ together form a methylene group optionally substituted by alkyl groups, a 1,2-ethylene group optionally substituted by C₁ -C₁₂ -alkyl or phenyl groups or a 1,3-propylene group.

10. Antistatic plastic formed articles containing at least two layers on the surface of which an antistatic layer located nearer to the plastic surface contains a preparation of a polythiophene that is built up from structural units of the formula ##STR9## in which R₁ and R₂ independently of each other stand for hydrogen or a C₁ -C₄ -alkyl group or together form an optionally substituted C₁ -C₄ -alkylene group or a 1,2-cyclohexylene group,

and a polyanion, wherein said polythiophene preparation contains solids, a protective layer located farther from the plastic surface than the antistatic layer contains a film-forming polymer and at least one of the at least two layers contains a silane of formula (II)

View Dependent Claims (11, 12, 13, 14, 15, 16, 17)

11. Photographic materials with a plastic base that contains on the one side at least one silver halide emulsion layer, characterized in that on the other side it contains at least two layers according to claim 10.

12. Photographic material according to claim 11, characterized in that the plastic base is a transparent cellulose triacetate or polyester film.

13. Plastic formed articles according to claim 10 wherein the total amount of the silane present in said at least one of said at least two layers is 10 to 100 wt-%, relative to the solids of the polythiophene preparation.

14. Antistatic plastic formed articles according to claim 10, wherein both said antistatic layer and said protective layer contain said silane in an amount of 1 to 300 wt-% relative to the solids of the polythiophene preparation, and at least 10 wt-% of the silane present in said at least two layers is contained in the protective layer.

15. Antistatic plastic formed articles according to claim 10, wherein at least 40 wt-% of the silane present in said at least two layers is contained in the protective layer.

16. Antistatic plastic formed articles according to claim 14, wherein at least 40 wt-% of the silane present in.

17. Plastic formed articles according to claim 10, wherein R₁ and R₂ together form a methylene group optionally substituted by alkyl groups, a 1,2-ethylene group optionally substituted by C₁ -C₁₂ -alkyl or phenyl groups or a 1,3-propylene group.