Specific adhesive compound suitable for easy removal

• US 6,696,124 B1
• Filed: 09/24/1999
• Issued: 02/24/2004
• Est. Priority Date: 09/25/1998
• Status: Expired due to Fees

• Current Assignee: SIKA Schweiz AG (Compagnie De Saint-Gobain S.A.)
• Original Assignee: SIKA Schweiz AG (Compagnie De Saint-Gobain S.A.)
• Inventors: Wirz, Thomas, Burchardt, Bernd Rudi, Merz, Peter W.
• Primary Examiner(s): Pyon, Harold
• Assistant Examiner(s): Egan, Brian P.
• Application Number:
  US09/404,821
• Time in Patent Office: 1,614 Days
• Field of Search: 296/84.1, 296/96.21, 296/200, 296/96.22, 428/40.1, 428/43, 428/38, 428/81, 428/105, 428/120, 428/172, 428/192, 428/200-201, 428/343, 428/353, 427/207.1, 156/108, 156/293, 156/310, 156/500
• US Class Current: 428/40.1
• CPC Class Codes: B29C 65/00 Joining or sealing of preformed parts , e.g. welding of plastics materials; Apparatus therefor general aspects of processes or apparatus for joining preformed parts B29C66/00; using porous material formed by internal pressure generated therein for joining preformed parts B29C44/1228, B29C44/326
• CPC Class Codes: B29C 65/76 Making non-permanent or releasable joints
• CPC Class Codes: B29C 66/534 Joining single elements to open ends of tubular or hollow articles or to the ends of bars
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29L 2031/30 Vehicles, e.g. ships or aircraft, or body parts thereof vanes or blades B29L2031/08, air bags B29L2022/027
• CPC Class Codes: B29L 2031/778 Windows profiled elements for making window frames B29L2031/005, windscreens B29L2031/3052
• CPC Class Codes: B32B 17/10009 characterized by the number, the constitution or treatment of glass sheets
• CPC Class Codes: B32B 17/10165 Functional features of the laminated safety glass or glazing
• CPC Class Codes: B60J 10/45 Assembling sealing arrangements with vehicle parts
• CPC Class Codes: B60J 10/70 specially adapted for windows or windscreens
• CPC Class Codes: C08L 75/04 Polyurethanes
• CPC Class Codes: C09J 2475/00 Presence of polyurethane
• CPC Class Codes: C09J 5/04 involving separate application of adhesive ingredients to the different surfaces to be joined
• CPC Class Codes: Y10T 428/14 Layer or component removable to expose adhesive
• CPC Class Codes: Y10T 428/15 Sheet, web, or layer weakened to permit separation through thickness
• CPC Class Codes: Y10T 428/24058 including grain, strips, or filamentary elements in respective layers or components in angular relation
• CPC Class Codes: Y10T 428/24777 Edge feature
• CPC Class Codes: Y10T 428/24851 Intermediate layer is discontinuous or differential
• 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 428/2843 including a primer layer

Abstract

An adhesive compound is described that is formed using a specific adhesive system. Due to the specific adhesive system the disconnecting of the adhesive compound is considerably eased, which, in particular, is of great benefit for the quick removal of plastic windows in case of emergency. The specific properties of the adhesive compound are based on its specific structure. In the middle of the compound between the substrates a specific parting layer is installed by which the two substrates can be disconnected easily. The parting layer preferably is an elastomer that has an extremely high tenacity and an elongation at rupture of 500% up to more than 1500% and that shows a good adherence to the assembly adhesive so that the removal can be performed by stretching the parting layer whereby it constricts and thereby peels off from the adhesive.

Claims

1. An adhesive article for adhering two opposing substrates comprising:

two opposing layers of modular adhesive, and an elastomeric parting layer interposed between said layers of modular adhesive, wherein the parting layer forms a joint uniformly distributed in the area between the modular adhesive layers, and the parting layer peels off from the adhesive layers when the parting layer is stretched.

2. The adhesive article according to claim 1, wherein said parting layer has an elongation at rupture of 500% up to 1500%.

3. The adhesive article according to claim 1, wherein said parting layer is a polyurethane.

4. The adhesive article according to claim 1, which includes at least one layer of at least one primer between at least one layer of modular adhesive and said parting layer.

5. The adhesive article according to claim 1, wherein said parting layer is an elastic polyurethane adhesive having an elongation at rupture of 500% up to 1500%.

6. The adhesive article according to claim 1, wherein said modular adhesive comprises a single component polyurethane adhesive.

7. The adhesive article according to claim 1, wherein said parting layer includes a tool that improves the grasping of the parting layer and therefore improves the application of tractive forces to said parting layer.

8. The adhesive article according to claim 7, wherein said tool is a handle or a ring.

9. The adhesive article according to claim 1, wherein said parting layer is a polyurethane elastomer having an elongation at rupture of 500% to 1500% and said modular adhesive comprises a single component polyurethane.

10. An article of manufacture comprising a plastic window and a flange bonded together with the adhesive article of claim 9.

11. An article of manufacture comprising two opposing substrates bonded together with the adhesive article of claim 1.

12. The article of manufacture according to claim 11, wherein said two substrates are one flange and one plastic window.

13. Module for the manufacturing of an article of manufacture according to claim 11, said module comprising a substrate, a modular adhesive layer and, on said adhesive layer, a parting layer composed of an elastomer located in the edging area of said substrate, wherein the parting layer has the property of peeling away from the adhesive layer when the parting layer is stretched.

14. Module according to claim 13, wherein said substrate is a plastic window.

15. Module according to claim 13, wherein said parting layer is a polyurethane elastomer and said modular adhesive is a single component polyurethane adhesive.

16. Module according to claim 13, wherein said parting layer is a parting layer that is fitted to said edging area.

17. Module according to claim 16, wherein said parting layer is a parting layer profile.