Roller Coating

• US 20140295089A1
• Filed: 08/24/2011
• Published: 10/02/2014
• Est. Priority Date: 08/24/2011
• Status: Active Grant

• Current Assignee: Hewlett-Packard Indigo BV (HP Inc.)
• Original Assignee: Hewlett-Packard Indigo BV (HP Inc.)
• Inventors: Li, Guang Jin, Tanchangco, Daniel
• Granted Patent: US 9,684,267 B2
• Time in Patent Office: Days
• US Class Current: 427/385.5
• CPC Class Codes: C08G 18/3225 Polyamines
• CPC Class Codes: C08G 18/61 Polysiloxanes
• CPC Class Codes: C08G 18/7664 containing alkylene polyphenyl groups
• CPC Class Codes: C08G 18/7671 containing only one alkylene bisphenyl group
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: C09D 175/02 Polyureas
• CPC Class Codes: C09D 175/04 Polyurethanes
• CPC Class Codes: G03G 15/10 using a liquid developer

Abstract

A method of preparing the surface of a roller comprising adding a coating comprising isocyanate to a ground surface of the roller. A roller comprising a ground surface, the ground surface having unreacted hydroxyl (—OH) groups on the surface of the roller and a layer of isocyanate layered over the unreacted hydroxyl (—OH) groups on the surface of the roller, the isocyanate forming a urethane bond on the surface of the roller.

Claims

1. A method of preparing the surface of a roller comprising:

adding a coating comprising isocyanate to a ground surface of the roller.

2. The method of claim 1, which the coating further comprises a siloxane.

3. The method of claim 2, in which the coating forms a polyurethane bond with the roller.

4. The method of claim 3, in which excess isocyanate within the coating is cured by moisture to form polyurea.

5. The method of claim 1, in which adding a coating comprising isocyanate to the surface of the roller creates a urethane bond with unreacted hydroxyl (—

OH) groups on the surface of the roller.

6. The method of claim 2, in which the siloxane is a non-functional silicone.

7. The method of claim 2, in which the siloxane is a functional silicone.

11. The roller of claim 1 further comprising a siloxane mixed with the isocyanate, the siloxane forming a chemical bond with the urethane bond, a urea bond, or combinations thereof.

12. The roller of claim 1 further comprising a siloxane mixed with the isocyanate, the siloxane forming a protective layer over the urethane bonded isocyanate.

8. A roller comprising:

a ground surface;

the ground surface having unreacted hydroxyl (—

OH) groups on the surface of the roller; and

a layer of isocyanate layered over the unreacted hydroxyl (—

OH) groups on the surface of the roller;

the isocyanate forming a urethane bond on the surface of the roller.

9. The roller of claim 8, in which the isocyanate reacts with moisture to form a polyurea.

10. The roller of claim 8, in which the isocyanate reacts with an organic amine to form a polyurea.

13. A method preparing a developer roller, comprising:

adding a mixture of isocyanate and silicone coating to a ground surface of the developer roller; and

curing the coating.

14. The method of claim 13 further comprising:

with the mixture of isocyanate and silicone coating, forming a urethane bond with the surface of the developer roller.

15. The method of claim 14, in which the silicone is a isocyanate functional silicone.