Antistatic coated polyester film

• US 10,301,483 B2
• Filed: 02/04/2015
• Issued: 05/28/2019
• Est. Priority Date: 02/07/2014
• Status: Active Grant

• Current Assignee: DuPont Performance Elastomers L (Bristol-Myers Squibb Company)
• Original Assignee: DuPont Performance Elastomers L (Bristol-Myers Squibb Company)
• Inventors: Strickland, Debra S., Robinson, Julian Neal, Symonds, Jackie H., Chappell, Jr., Cornell
• Primary Examiner(s): Chen, Vivian
• Application Number:
  US15/111,221
• Publication Number:
  US 20160333196A1
• Time in Patent Office: 1,574 Days
• Field of Search: None
• CPC Class Codes: B32B 2250/02 2 layers
• CPC Class Codes: B32B 2250/03 3 layers
• CPC Class Codes: B32B 2255/10 on synthetic resin layer or on natural or synthetic rubber layer
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2307/21 Anti-static
• CPC Class Codes: B32B 2307/518 bi-axially
• CPC Class Codes: B32B 2333/00 Polymers of unsaturated acids or derivatives thereof
• CPC Class Codes: B32B 2333/04 Polymers of esters
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/18 characterised by the use of special additives
• CPC Class Codes: B32B 27/20 using fillers, pigments, thixotroping agents
• CPC Class Codes: B32B 27/30 comprising vinyl (co)polymers; comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/308 comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: C08J 2367/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds; C08J2367/06 takes precedence
• CPC Class Codes: C08J 2371/02 Polyalkylene oxides
• CPC Class Codes: C08J 2379/02 Polyamines
• CPC Class Codes: C08J 2471/02 Polyalkylene oxides
• CPC Class Codes: C08J 2479/02 Polyamines
• 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: C08K 2201/001 : Conductive additives
• CPC Class Codes: C08K 2201/017 : Additives being an antistatic agent
• CPC Class Codes: C08K 5/0075 : Antistatics
• CPC Class Codes: C08K 5/09 : Carboxylic acids; Metal salts thereof; Anhydrides thereof
• CPC Class Codes: C08K 5/098 : Metal salts of carboxylic acids
• CPC Class Codes: C08K 5/17 : Amines; Quaternary ammonium compounds
• CPC Class Codes: C08K 5/19 : Quaternary ammonium compounds
• CPC Class Codes: C08K 5/20 : Carboxylic acid amides
• CPC Class Codes: C08L 33/04 : Homopolymers or copolymers of esters C08L43/04 takes precedence
• CPC Class Codes: C08L 33/06 : of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
• CPC Class Codes: C08L 33/08 : Homopolymers or copolymers of acrylic acid esters
• CPC Class Codes: C08L 39/00 : Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Compositions of derivatives of such polymers
• CPC Class Codes: C09D 133/04 : Homopolymers or copolymers of esters C09D143/04 takes precedence
• CPC Class Codes: C09D 133/06 : of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
• CPC Class Codes: C09D 133/08 : Homopolymers or copolymers of acrylic acid esters
• CPC Class Codes: C09D 139/00 : Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Coating compositions based on derivatives of such polymers
• CPC Class Codes: C09D 171/02 : Polyalkylene oxides
• CPC Class Codes: C09D 5/00 : Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced electrically insulating plastics, resins or waxes H01B3/30; Filling pastes
• CPC Class Codes: C09D 5/24 : Electrically-conducting paints conductive materials H01B1/00
• CPC Class Codes: C09D 7/63 : organic
• CPC Class Codes: Y10T 428/31786 : Of polyester [e.g., alkyd, etc.]
• CPC Class Codes: Y10T 428/31797 : Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31935 : Ester, halide or nitrile of addition polymer

Abstract

An antistatic polyester film includes a self-supporting polyester substrate film bearing on at least one surface thereof an antistatic layer including a) one or more antistatic polymers comprising repeat units according to formula (I) wherein R¹ and R² are each independently H or CH₃, R³ is an alkylene group having a carbon number in a range from 2 to 10, R⁴ and R⁵ are each independently a saturated hydrocarbon group having a carbon number in a range from 1 to 5, R⁶ is an alkylene group having a carbon number in a range from 2 to 5, n is an integer in a range from 0 to 40, m is an integer in a range from 1 to 40, and Y″ is a halogen ion, nitrate ion, sulfate ion, alkylsulfate ion, sulfonate ion, alkylsulfonate ion or dihydrogen phosphate ion; b) one or more nonpolymeric cationic antistatic agents; and c) one or more crosslinkers.

Claims

1. An antistatic polyester film, comprising a self-supporting polyester substrate film bearing on at least one surface thereof an antistatic layer formed from a coating composition comprising

a) one or more antistatic polymers comprising repeat units according to formula (I)

2. The film of claim 1, wherein the antistatic layer further comprises one or more nonionic and/or cationic surfactants.

3. The film of claim 1, wherein the one or more crosslinkers include a polymer bearing multiple oxazoline groups.

4. The film of claim 1, wherein the one or more crosslinkers include one or more polymers comprising repeat units according to formula (II)

5. The film of claim 4, wherein R⁷ and R⁸ are each H.

6. The film of claim 1, wherein the antistatic layer does not comprise an emulsion polymer, as a binder.

7. The film of claim 1, wherein the antistatic layer does not comprise a non-antistatic polymer other than a polymeric crosslinker.

8. The film of claim 1, wherein R¹ and R² are each H, R³ is (CH₂)₃ , n is zero, R⁴ and R⁵ are each CH₃, and m is 1.

9. The film of claim 1, wherein Y⁻

is CH₃SO₃⁻

.

10. The film of claim 1, wherein the antistatic layer further comprises slip particles.

11. The film of claim 10, wherein the slip particles comprise silica and crosslinked poly(methyl methacrylate) beads.

12. The film of claim 1, wherein the antistatic layer further comprises a binder.

13. The film of claim 12, wherein the binder comprises an emulsion polymer.

14. The film of claim 12, wherein the binder is an acrylic copolymer of composition comprising methyl methacrylate, ethyl acrylate, acrylonitrile and N-methylolacrylamide.

15. The film of claim 1 further comprising a slip coating on a surface of the polyester substrate opposite the antistatic layer.

16. The film of claim 15, wherein the slip coating comprises a discontinuous layer of an acrylic and/or methacrylic polymeric resin and optionally further comprises a cross-linking agent.

17. The film of claim 15, wherein the slip coating comprises a particulate material.