Easy de-glazing reactive hot melt adhesive

• US 20040194881A1
• Filed: 04/04/2003
• Published: 10/07/2004
• Est. Priority Date: 04/04/2003
• Status: Abandoned Application

• Current Assignee: National Starch and Chemical Investment Holding Corporation
• Original Assignee: National Starch and Chemical Investment Holding Corporation
• Inventors: Zhang, Yue S., Hung, Ju-Ming, Gefri, Michael T.
• Application Number:
  US10/408,139
• Publication Number:
  US 20040194881A1
• Time in Patent Office: Days
• US Class Current: 156/329
• CPC Class Codes: C08G 18/12 using two or more compounds having active hydrogen in the first polymerisation step
• CPC Class Codes: C08G 18/283 Compounds containing ether groups, e.g. oxyalkylated monohydroxy compounds
• CPC Class Codes: C08G 18/307 Atmospheric humidity
• CPC Class Codes: C09J 175/04 Polyurethanes
• CPC Class Codes: C09J 2301/502 process for debonding adherents
• CPC Class Codes: C09J 2400/143 in the substrate
• CPC Class Codes: C09J 5/06 involving heating of the applied adhesive
• CPC Class Codes: Y10T 156/1168 Gripping and pulling work apart during delaminating

Abstract

High green strength reactive hot melt adhesives that allow for easy deglazing of windows are provided.

Claims

1. A method of manufacturing a window comprising the steps of:

a) providing a plurality of substrates;

b) applying a reactive hot melt adhesive to at least one of the plurality of substrates; and

c) combining the plurality of substrates such that the reactive hot melt adhesive forms a bond between the substrates,

wherein the reactive hot melt adhesive comprises at least one multifunctional isocyanate component, at least one monofunctional reactant component, optionally a polyester polyol component, optionally a thermoplastic polymer and optionally a polyether polyol component.

2. The method of claim 1, wherein the reactive hot melt adhesive has a hardness of less than about 70 Shore A.

3. The method of claim 2, wherein the reactive hot melt is a silicone reactive hot melt.

4. The method of claim 2, wherein the reactive hot melt is a polyurethane reactive hot melt.

5. The method of claim 2, wherein the reactive hot melt is a foamed silicone reactive hot melt.

6. The method of claim 2, wherein the reactive hot melt is a foamed polyurethane reactive hot melt.

7. The method of claim 1, wherein the plurality of substrates comprise at least one glass pane and at least one frame.

8. The method of claim 7, wherein the frame is vinyl, aluminum, wood or fiberglass composite.

9. A method of deglazing a window comprising the steps of:

a) providing a window having one or more glass panes that are glazed to a frame using a reactive hot melt adhesive;

b) cutting the reactive hot melt adhesive so that the glass pane and window frame may be separated from each other,

wherein the reactive hot melt adhesive comprises at least one multifunctional isocyanate component, at least one monofunctional reactant component, optionally a polyester polyol component, optionally a thermoplastic polymer and optionally a polyether polyol component.

10. The method of claim 9, wherein the reactive hot melt adhesive has a hardness of less than about 70 Shore A.

11. The method of claim 10, wherein the reactive hot melt is a silicone reactive hot melt.

12. The method of claim 10, wherein the reactive hot melt is a polyurethane reactive hot melt.

13. The method of claim 10, wherein the reactive hot melt is a foamed silicone reactive hot melt.

14. The method of claim 10, wherein the reactive hot melt is a foamed polyurethane reactive hot melt.

15. The window of claim 10, wherein the frame is vinyl, aluminum, wood or fiberglass composite.

16. The method of claim 10, further comprising the step of applying heat to the reactive hot melt adhesive before it is cut.