Hybrid components with reactive hotmelt adhesives
View Patent ↗A description is given of the use of reactive hotmelt adhesives based on copolyamide and further comprising isocyanate and epoxide and also a functionalized polyolefin in hybrid components. These hybrid components find applications in vehicle construction and in aircraft construction, for example.
1. A process for producing a hybrid component, the process comprising joining a metal component to a polyolefin component with a copolyamide-based hotmelt adhesive comprising a copolyamide, a blocked isocyanate, an epoxide, and a functionalized polyolefin, said process not comprising a cathodic electrocoat treatment,
wherein the hotmelt adhesive comprises 2.5% to 15% of the blocked isocyanate and 2.5% to 10% of the epoxide,
wherein the hotmelt adhesive comprises 10% to 60% of the functionalized polyolefin, and
wherein the functionalized polyolefin is functionalized with at least one acid anhydride moiety.
2. The process of claim 1 , wherein the copolyamide is based on laurolactam.
3. The process of claim 2 , wherein the hotmelt adhesive comprises 4% to 6% of the blocked isocyanate and 4% to 7.5% of the epoxide.
4. The process of claim 2 , wherein the functionalized polyolefin is based on polypropylene, ethylene and at least one C 3 to C 12 α-olefin copolymer.
5. The process of claim 2 , wherein
the metal component is partially or entirely coated with the hotmelt adhesive,
coating occurs with an electrostatic spray gun, a painting system, or both, and
the metal component is heated at 150° C. for between 120 to 300 seconds.
6. An aircraft or vehicle hybrid component, produced by the process of claim 2 .
7. The process of claim 1 , wherein the hotmelt adhesive comprises 4% to 6% of the blocked isocyanate and 4% to 7.5% of the epoxide.
8. The process of claim 7 , wherein the functionalized polyolefin is based on polypropylene, ethylene and at least one C 3 to C 12 α-olefin copolymer.
9. The process of claim 7 , wherein
the metal component is partially or entirely coated with the hotmelt adhesive,
coating occurs with an electrostatic spray gun, a painting system, or both; and
the metal component is heated at 150° C. for between 120 to 300 seconds.
10. An aircraft or vehicle hybrid component, produced by the process of claim 7 .
11. The process of claim 1 , wherein the functionalized polyolefin is based on polypropylene, ethylene and at least one C 3 to C 12 α-olefin copolymer.
12. The process of claim 1 , wherein
the metal component is partially or entirely coated with the hotmelt adhesive,
coating occurs with an electrostatic spray gun, a painting system, or both; and
the metal component is heated at 150° C. for between 120 to 300 seconds.
13. An aircraft or vehicle hybrid component, produced by the process of claim 1 .