Information display protectors

• US 6,660,389 B2
• Filed: 08/07/2001
• Issued: 12/09/2003
• Est. Priority Date: 08/07/2000
• Status: Expired due to Term

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Liu, Junkang J., Kluge, Bruce D., Fong, Bettie C.
• Primary Examiner(s): Chen, Vivian
• Application Number:
  US09/924,127
• Publication Number:
  US 20020122925A1
• Time in Patent Office: 854 Days
• Field of Search: 428/421, 428/422, 428/446, 428/468, 428/451, 428/483, 428/522, 428/40.6, 428/40.7, 428/41.8, 428/323, 428/331, 428/213, 428/215, 428/216, 428/343, 526/242, 526/246, 359/507
• US Class Current: 428/421
• CPC Class Codes: C08F 2/44 Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
• CPC Class Codes: C08F 220/20 of polyhydric alcohols or phenols , e.g. 2-hydroxyethyl (meth)acrylate or glycerol mono-(meth)acrylate
• CPC Class Codes: C08F 222/103 of trialcohols, e.g. trimethylolpropane tri(meth)acrylate
• CPC Class Codes: C08F 290/06 Polymers provided for in subclass C08G
• CPC Class Codes: C08F 290/062 Polyethers
• CPC Class Codes: C08G 65/007 containing fluorine
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 53/00 Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
• CPC Class Codes: C09D 153/00 Coating compositions based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
• CPC Class Codes: C09D 171/02 Polyalkylene oxides
• CPC Class Codes: C09D 4/00 Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
• CPC Class Codes: C09D 4/06 Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
• CPC Class Codes: C09J 153/00 Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
• CPC Class Codes: C09J 2433/00 Presence of (meth)acrylic polymer
• CPC Class Codes: C09J 7/22 Plastics; Metallised plastics
• CPC Class Codes: C09J 7/30 characterised by the adhesive composition
• CPC Class Codes: G01N 1/36 Embedding or analogous mounting of samples
• CPC Class Codes: G02B 21/34 Microscope slides, e.g. mounting specimens on microscope slides
• CPC Class Codes: G06F 1/1607 Arrangements to support accessories mechanically attached to the display housing G06F1/1603, G06F1/1605 take precedence
• CPC Class Codes: G06F 1/1626 : with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
• CPC Class Codes: G06F 1/1637 : Details related to the display arrangement, including those related to the mounting of the display in the housing
• CPC Class Codes: G06F 2200/1634 : Integrated protective display lid, e.g. for touch-sensitive display in handheld computer
• CPC Class Codes: G06F 3/041 : Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: H01J 29/868 : Screens covering the input or output face of the vessel, e.g. transparent anti-static coatings, X-ray absorbing layers
• CPC Class Codes: H04N 5/65 : Holding-devices for protective discs or for picture masks
• CPC Class Codes: H04N 9/3141 : Constructional details thereof details not peculiar to the presence of an electronic spatial light modulator G03B21/14
• CPC Class Codes: Y10T 156/1002 : with permanent bending or reshaping or surface deformation of self sustaining lamina
• CPC Class Codes: Y10T 428/1424 : Halogen containing compound
• CPC Class Codes: Y10T 428/1429 : Fluorine
• CPC Class Codes: Y10T 428/1476 : Release layer
• CPC Class Codes: Y10T 428/24802 : Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• CPC Class Codes: Y10T 428/24942 : including components having same physical characteristic in differing degree
• CPC Class Codes: Y10T 428/2495 : Thickness [relative or absolute]
• CPC Class Codes: Y10T 428/24967 : Absolute thicknesses specified
• CPC Class Codes: Y10T 428/24975 : No layer or component greater than 5 mils thick
• CPC Class Codes: Y10T 428/25 : Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/259 : Silicic material
• CPC Class Codes: Y10T 428/265 : 1 mil or less
• CPC Class Codes: Y10T 428/28 : Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/2813 : Heat or solvent activated or sealable
• CPC Class Codes: Y10T 428/2848 : Three or more layers
• CPC Class Codes: Y10T 428/2891 : including addition polymer from alpha-beta unsaturated carboxylic acid [e.g., acrylic acid, methacrylic acid, etc.] Or derivative thereof
• CPC Class Codes: Y10T 428/3154 : Of fluorinated addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31544 : Addition polymer is perhalogenated
• CPC Class Codes: Y10T 428/31663 : As siloxane, silicone or silane
• CPC Class Codes: Y10T 428/31797 : Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/3188 : Next to cellulosic
• CPC Class Codes: Y10T 428/31891 : Where addition polymer is an ester or halide
• CPC Class Codes: Y10T 428/31909 : Next to second addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31928 : Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31935 : Ester, halide or nitrile of addition polymer

Abstract

Information display protectors for display devices having an information display area, comprising a stack of flexible substantially transparent sheets, the sheets having on one side thereof an adhesive layer and having on the other side thereof a hardcoat layer comprising inorganic oxide particles dispersed in a binder matrix and a low surface energy fluorinated compound, the stack being cut so that the sheets will fit the information display area. The low surface energy fluorinated compound can be part of the hardcoat layer or can be a separate layer atop the hardcoat layer. The protectors have very good scratch, smudge and glare resistance. The stack of protectors can be stored, for example, on a personal digital assistant or its cover or case.

Claims

1. Information display protectors for a display device having an information display area, comprising a stack of flexible substantially transparent sheets, the sheets having on one side thereof an adhesive layer and having on the other side thereof a hardcoat layer comprising inorganic oxide particles dispersed in a binder matrix and a low surface energy fluorinated compound, the hardcoat layer having:

a) an ink repellency rating of at least 2 on a 6 point scale in which 0 corresponds to completely wettable, 2 corresponds to intermittently wettable and 6 corresponds to completely unwettable,

b) at least a 2 rub cycle cheesecloth durability rating and

c) at least a 7 rub cycle steel wool durability rating, the stack being cut so that the sheets will fit the information display area.

2. Information display protectors according to claim 1 wherein the hardcoat comprises colloidal inorganic oxide particles dispersed in a free-radically cured binder.

3. Information display protectors according to claim 2 wherein the colloidal inorganic oxide particles comprise colloidal silica particles

4. Information display protectors according to claim 1 wherein the binder is derived from one or more copolymerizable free-radically curable monomers, oligomers, polymers or combinations therof.

5. Information display protectors according to claim 1 wherein the binder comprises a conductive polymer.

6. Information display protectors according to claim 1 wherein the fluorinated compound is derived from a perfluoropolyether having the formula:

7. Information display protectors according to claim 1 wherein the fluorinated compound comprises at least one of:

(C₂H₅O)₂CH₃SiC₃H₆NHCO(CF₂O)(C₂F₄O)CF₂CONHC₃H₆SiCH₃(OC₂H₅)₂,

(C₂H₅O)₃SiC₃H₆NHCO(CF₂O)(C₂F₄O)CF₂CONHC₃H₆Si(OC₂H₅)₃,

F(CF(CF₃)CF₂O)₂₅CF2CF₃, C₄H₉NHCO(CF₂O)(C₂F₄O)CF₂CONHC₄H₉,

CH₂═

CHCOOC₂H₄NHCO(CF₂O)(C₂F₄O)CF₂CONHC₂H₄OOCCH═

CH₂,

CH₂═

CHCOOCH₂(CF₂O)(C₂F₄O)CF₂CH₂OOCCH═

CH₂,

(HOCH₃)₂CH₂NHCO(CF₂O)(C₂F₄O)CF₂CONHCH₂(CH₂OH)₂,

(C₂H₅O)₃Si(CH₂)₃NHCO(CF₂CF₂O)₈CF₂CONH(CH₂)₃Si(OC₂H₅)₃,

(C₂H₅O)₂CH₃Si(CH₂)₃NHCO(CF₂CF₂O)₈CF₂CONH(CH₂)₃SiCH₃(OC₂H₅)₂,

(C₂H₅O)₂CH₃Si(CH₂)₃NHCO(CF₂CF₂O)₁₄CF₂CONH(CH₂)₃SiCH₃(OC₂H₅)₂,

(C₂H₅O)₃Si(CH₂)₃NHCO(CF₂C(CF₃)FO)₁₂CF₂CONH(CH₂)₃Si(OC₂H₅)₃,

(C₂H₅O)₂CH₃Si(CH₂)₃NHCO(CF₂C(CF₃)FO)₁₂CF₂CONH(CH₂)₃SiCH₃(OC₂H₅)₂, or

8. Information display protectors according to claim 1 wherein the hardcoat layer comprises the fluorinated compound.

9. Information display protectors according to claim 1 wherein the hardcoat layer has a thickness of from about 1 micrometer to about 100 micrometers.

10. Information display protectors according to claim 1 wherein an antisoiling layer atop the hardcoat layer comprises the fluorinated compound.

11. Information display protectors according to claim 10 wherein the antisoiling layer has a thickness of about 0.005 to about 2 micrometers.

12. Information display protectors according to claim 1 further comprising a substantially transparent adhesive layer.

13. Information display protectors according to claim 12 wherein the adhesive is non-tacky with respect to skin.

14. Information display protectors according to claim 1 wherein the substrate has two major sides with the hardcoat on one such side and an adhesive layer on the other such side.

15. Information display protectors according to claim 14 having a roughened surface on the hardcoat side of the information display protector and a microtextured adhesive surface on the other side of the information display protector.

16. Information display protectors according to claim 1 having a roughened surface on the hardcoat side of the information display protector.

17. An information display device comprising a personal digital assistant, cell phone, touch-sensitive screen, wrist watch, car navigation system, global positioning system, depth finder, calculator, electronic book, CD player, DVD player, projection television screen, computer monitor, notebook computer display or instrunent gauge, having a stack of information display protectors according to claim 1 adhered thereto.

18. An information display device according to claim 17 wherein the stack is adhered to the back of a personal digital assistant.

19. An information display device according to claim 17 wherein the stack is adhered to the front cover of a personal digital assistant.

20. An information display device according to claim 17 wherein the personal digital assistant comprises a case with the stack adhered thereto.