Method for adhering structures using silicone adhesive system

• US 10,106,712 B2
• Filed: 11/12/2014
• Issued: 10/23/2018
• Est. Priority Date: 12/19/2013
• Status: Active Grant

• Current Assignee: Rtx Corporation
• Original Assignee: United Technologies Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Vontell, John H., Meyer, Jesse C., Watson, Charles R.
• Primary Examiner(s): Orlando, Michael N
• Assistant Examiner(s): Schaller, Cynthia L
• Application Number:
  US15/106,044
• Publication Number:
  US 20160319172A1
• Time in Patent Office: 1,441 Days
• CPC Class Codes: C08G 77/20 containing silicon bound to unsaturated aliphatic groups C08G77/045 takes precedence
• CPC Class Codes: C09J 183/04 Polysiloxanes
• CPC Class Codes: C09J 5/02 involving pretreatment of the surfaces to be joined

Abstract

A method of adhering a first structure to a second structure using a primer, containing a primer fugitive inhibitor, and a film adhesive by removing the primer fugitive inhibitor under vacuum at room temperature conditions.

Claims

1. A method of adhering a first structure including a first surface to a second structure including a second surface, the method comprising the steps of:

(a) applying a primer, formulated with a primer fugitive inhibitor, to the first surface and to the second surface;

(b) applying a film adhesive, formulated with a catalyst stable at room temperature conditions, to one of the first surface and the second surface so as to create first and second pre-adhered surfaces;

(c) placing the first pre-adhered surface into contact with the second pre-adhered surface to form a pre-adhered assembly; and

(d) placing the pre-adhered assembly under a vacuum for a period of time;

wherein the time period comprises a time to remove the primer fugitive inhibitor by vacuum so as to permit the first and second pre-adhered surfaces to be adhered to one another.

2. The method of claim 1, wherein the primer comprises a platinum catalyzed silicone composition.

3. The method of claim 1, wherein the film adhesive comprises a silicone composition.

4. The method of claim 1, wherein the catalyst is selected from a group consisting of:

peroxide and platinum.

5. The method of claim 4, wherein the catalyst includes a catalyst fugitive inhibitor.

6. The method of claim 1, wherein the primer is applied on the entire surface of the first structure surface and the entire surface of the second structure surface.

7. The method of claim 6, wherein the primer is applied at a thickness of less than or equal to approximately 100 microinches.

8. The method of claim 1, wherein the film adhesive is applied on the entire surface of either the first structure surface or the entire surface of the second structure surface.

9. The method of claim 8 wherein the film adhesive is applied at a thickness of less than or equal to approximately 0.02 inch.

10. The method of claim 5, wherein the time period further comprises a time to remove the catalyst fugitive inhibitor by vacuum so as to permit the first and second pre-adhered surfaces to be adhered to one another.

11. The method of claim 1, wherein the time period is less than or equal to approximately 8 hours.

12. The method of claim 1, wherein step (d) further comprises applying pressure to pre-adhered assembly.

13. The method of claim 12, wherein the pressure applied is less than or equal to approximately 250 pounds per square inch.