Refurbished component, electronic device including the same, and method of refurbishing a component of an electronic device

• US 9,308,616 B2
• Filed: 01/17/2014
• Issued: 04/12/2016
• Est. Priority Date: 01/21/2013
• Status: Active Grant

• Current Assignee: Communications Test Design Incorporated
• Original Assignee: Innovative Finishes LLC
• Inventors: Bliss, Jeffrey J.
• Primary Examiner(s): Yuan, Dah-Wei D
• Assistant Examiner(s): Law, Nga Leung V
• Application Number:
  US14/157,642
• Publication Number:
  US 20140206795A1
• Time in Patent Office: 816 Days
• Field of Search: 427/165, 427/168, 427/140, 427/407.2
• US Class Current: 1/1
• CPC Class Codes: B24B 13/015 of television picture tube viewing panels, headlight reflectors or the like
• CPC Class Codes: B24B 29/02 designed for particular workpieces
• CPC Class Codes: B24B 37/044 characterised by the composition of the lapping agent
• CPC Class Codes: B24B 7/242 for plate glass
• CPC Class Codes: B24C 1/086 Descaling; Removing coating films
• CPC Class Codes: C09G 1/02 containing abrasives or grinding agents abrasives as such C09K3/14; polishing of semi-conductors H01L

Abstract

A method of refurbishing a surface of a component for an electronic device includes: abrading a surface to be refurbished with an abrasive to remove a coating on the surface and provide an abraded surface; optionally firstly cleaning the abraded surface by contacting with a glass cleaner to provide a firstly cleaned surface; optionally secondly cleaning the firstly cleaned surface by contacting the firstly cleaned surface with a grease remover to provide a secondly cleaned surface; optionally contacting the secondly cleaned surface with an activator to provide an activated surface; and disposing a coating resin on the abraded and optionally activated surface; and curing the coating resin to provide a coated surface to refurbish the surface of the electronic device.

Claims

1. A method of refurbishing a surface of a component for an electronic device, the method comprising:

abrading a surface to be refurbished with an abrasive to remove a coating on the surface and provide an abraded surface;

optionally firstly cleaning the abraded surface by contacting with a glass cleaner to provide a firstly cleaned surface;

optionally secondly cleaning the firstly cleaned surface by contacting the firstly cleaned surface with a grease remover to provide a secondly cleaned surface;

optionally contacting the secondly cleaned surface with an activator to provide an activated surface; and

disposing a coating resin on the abraded and optionally activated surface; and

curing the coating resin to provide a coated surface to refurbish the surface of the electronic device,

wherein the coating resin comprises a first resin and a second resin,

the first resin comprises a clear coat and a hardener;

wherein the clear coat comprises a hydroxyl-functional binder comprising a polyurethane, a (meth)acrylic acid copolymer, or a combination thereof;

the polyurethane having a number average molecular weight Mn of 500 to 500,000 g/mol, an acid value of 0 to 100 mg KOH/g, and a hydroxyl value of 40 to 400 mg KOH/g;

the (meth)acrylic acid copolymer has a number average molecular mass Mn of 1000 to 20,000 g/mol, an acid value of 0 to 100 mg KOH/g, and a hydroxyl value of 40 to 400 mg KOH/g; and

the hardener comprises a polyisocyanate crosslinker; and

the second resin comprises a first component comprising

a hydroxyl functional dendritic polymer;

optionally an acrylic polyol; and

a plurality of metal oxide nanoparticles optionally encapsulated in a hydroxyl functional polymer or a hydroxyl functional fluorosurfactant.

2. The method of claim 1, wherein the abrading comprises abrading with a diamond polishing compound.

3. The method of claim 2, wherein the diamond polishing compound comprises diamond having a mesh of 600 to 2000 grit.

4. The method of claim 1, wherein the abrading comprises abrading with aluminum oxide having a particle size of 5 to 80 micrometers by abrasive jet machining.

5. The method of claim 1, wherein the activator comprises a silane.

6. The method of claim 1, wherein the polyurethane comprises a silicon-modified or a (meth)acrylate-modified polyurethane resin.

7. The method of claim 1, wherein the polyisocyanate crosslinker has an average NCO functionality of 1.5 to 5.

8. The method of claim 7, wherein the polyisocyanate crosslinker comprises hexamethylene diisocyanate, isophorone diisocyanate, 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate, 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethyl-cyclohexane, bis(isocyanatocyclohexyl)-methane, a derivative of one of the foregoing, or a combination thereof.

9. The method of claim 1, wherein the first resin further comprises a reducer, the reducer comprising butyl acetate, propylene glycol monoethyl ether acetate, propylene glycol methyl ether acetate, 2-methoxy-1-methylethyl acetate, 2-methoxypropyl-1-acetate, acetone, xylene, toluene, a combination comprising at least one of the foregoing.

10. The method of claim 1, wherein the second resin further comprises a second component, wherein the second component comprises a cross-linking agent comprising polyisocyanate, a melamine formaldehyde resin, or a combination thereof.

11. The method of claim 1, wherein the hydroxyl functional dendritic polymer is a branched polyester having a hydroxyl functionality of 40 to 80.

12. The method of claim 1, wherein the acrylic polyol has a hydroxyl functionality of 2 to 6.

13. The method of claim 1, wherein the plurality of encapsulated metal oxide nanoparticles comprises encapsulated aluminum oxide nanoparticles, encapsulated zinc oxide nanoparticles, or a combination thereof.

14. The method of claim 1, wherein the hydroxyl functional polymer is a hydroxyl functional silicone polyacrylate.

15. The method of claim 1, wherein the hydroxyl functional fluorosurfactant is a hydroxyl functional fluorinated methacrylate polymer.

16. A method of refurbishing a surface, the method comprising:

abrading a surface to be refurbished with an abrasive to remove a coating on the surface and provide an abraded surface;

optionally firstly cleaning the abraded surface by contacting with a glass cleaner to provide a firstly cleaned surface;

optionally secondly cleaning the firstly cleaned surface by contacting the firstly cleaned surface with a grease remover to provide a secondly cleaned surface;

optionally contacting the secondly cleaned surface with an activator to provide an activated surface; and

disposing a coating resin on the abraded and optionally activated surface; and

curing the coating resin to provide a coated surface to refurbish the surface,

wherein the coating resin comprises a first resin and a second resin,

the first resin comprises a clear coat and a hardener;

wherein the clear coat comprises a hydroxyl-functional binder comprising a polyurethane, a (meth)acrylic acid copolymer, or a combination thereof;

the polyurethane having a number average molecular weight Mn of 500 to 500,000 g/mol, an acid value of 0 to 100 mg KOH/g, and a hydroxyl value of 40 to 400 mg KOH/g;

the (meth)acrylic acid copolymer has a number average molecular mass Mn of 1000 to 20,000 g/mol, an acid value of 0 to 100 mg KOH/g, and a hydroxyl value of 40 to 400 mg KOH/g; and

the hardener comprises a polyisocyanate crosslinker; and

the second resin comprises a first component comprising

a hydroxyl functional dendritic polymer;

optionally an acrylic polyol; and

a plurality of metal oxide nanoparticles optionally encapsulated in a hydroxyl functional polymer or a hydroxyl functional fluorosurfactant.

17. A refurbished component for an electronic device comprising a surface and a polymerization product of a resin comprising a first component and a second component disposed on the surface,

wherein the first component comprises:

a hydroxyl functional dendritic polymer having a hydroxyl functionality of 40 to 80;

a plurality of metal oxide nanoparticles optionally encapsulated in a hydroxyl functional polymer or a hydroxyl functional fluorosurfactant; and

a hydroxyl-functional binder comprising a polyurethane, a (meth)acrylic copolymer, or a combination thereof, wherein the hydroxyl-functional binder has a hydroxyl functionality of 2 to 25;

the polyurethane having a number average molecular weight Mn of 500 to 500,000 g/mol, an acid value of 0 to 100 mg KOH/g, and a hydroxyl value of 40 to 400 mg KOH/g;

the (meth)acrylic acid copolymer has a number average molecular mass Mn of 1000 to 20,000 g/mol, an acid value of 0 to 100 mg KOH/g, and a hydroxyl value of 40 to 400 mg KOH/g; and

wherein the second component comprises a cross-linking agent comprising a polyisocyanate, a melamine formaldehyde resin, or a combination thereof.

18. A method of refurbishing a surface of a component for an electronic device, the method comprising:

abrading a surface to be refurbished with an abrasive to remove a coating on the surface and provide an abraded surface;

optionally firstly cleaning the abraded surface by contacting with a glass cleaner to provide a firstly cleaned surface;

optionally secondly cleaning the firstly cleaned surface by contacting the firstly cleaned surface with a grease remover to provide a secondly cleaned surface;

contacting the secondly cleaned surface with an activator to provide an activated surface; and

disposing a coating resin on the abraded and activated surface; and

curing the coating resin to provide a coated surface to refurbish the surface of the electronic device,

wherein the coating resin comprises a first resin and a second resin,

the first resin comprises a clear coat, hardener, and a reducer,

wherein the clear coat comprises a hydroxyl-functional binder comprising a polyurethane, a (meth)acrylic acid copolymer, or a combination thereof;

the polyurethane having a number average molecular weight Mn of 500 to 500,000 g/mol, an acid value of 0 to 100 mg KOH/g, and a hydroxyl value of 40 to 400 mg KOH/g;

the (meth)acrylic acid copolymer has a number average molecular mass Mn of 1000 to 20,000 g/mol, an acid value of 0 to 100 mg KOH/g, and a hydroxyl value of 40 to 400 mg KOH/g; and

the hardener comprises a polyisocyanate crosslinker; and

the reducer comprises a solvent; and

the second resin comprises a first component and a second component,

wherein the first component comprises;

a hydroxyl functional dendritic polymer;

optionally an acrylic polyol; and

a plurality of metal oxide nanoparticles optionally encapsulated in a hydroxyl functional polymer or a hydroxyl functional fluorosurfactant; and

the second component comprises a cross-linking agent comprising a polyisocyanate, a melamine formaldehyde resin, or a combination thereof, and

wherein the surface comprises glass.