	US 12,269,247 B2
	Process for recycling of bonded articles
Ulrike Licht, Ludwigshafen am Rhein (DE); Oliver Hartz, Ludwigshafen am Rhein (DE); Lionel Gehringer, Ludwigshafen am Rhein (DE); Sabine Bociek, Ludwigshafen am Rhein (DE); Erich Ries, Ludwigshafen am Rhein (DE); Juergen Ahlers, Gross-Rohrheim (DE); and Stephan Dohmen, Lemfoerde (DE)
Assigned to BASF SE, Ludwigshafen Am Rhein (DE)
Appl. No. 18/008,509
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed May 21, 2021, PCT No. PCT/EP2021/063664 § 371(c)(1), (2) Date Dec. 6, 2022, PCT Pub. No. WO2021/249749, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 20178965 (EP), filed on Jun. 9, 2020.
Prior Publication US 2023/0211598 A1, Jul. 6, 2023
Int. Cl. B32B 43/00 (2006.01); B32B 1/08 (2006.01); B32B 5/02 (2006.01); B32B 5/18 (2006.01); B32B 5/24 (2006.01); B32B 7/12 (2006.01)

CPC B32B 43/006 (2013.01) [B32B 1/08 (2013.01); B32B 5/022 (2013.01); B32B 5/026 (2013.01); B32B 5/18 (2013.01); B32B 5/245 (2013.01); B32B 7/12 (2013.01); B32B 2250/02 (2013.01); B32B 2255/26 (2013.01); B32B 2262/0276 (2013.01); B32B 2266/0278 (2013.01); B32B 2266/0292 (2013.01); B32B 2307/748 (2013.01); B32B 2433/04 (2013.01); B32B 2437/02 (2013.01)]

18 Claims

1. A method for debonding a bonded article,

wherein the bonded article comprises at least a first component and a second component which are bonded to one another by means of a polyurethane adhesive with a K value of not more than 100, measured as 1 wt. % solution in DMF at 25° C.;

wherein the first component is made from a thermoplastic polymer;

wherein the polyurethane adhesive is selected from the group consisting of aqueous polyurethane dispersion adhesives and polyurethane hotmelt adhesives;

and the at least two components are debonded by treatment with an aqueous surfactant composition at a temperature from 60° C. to 130° C., and at a pH of 4 to 12.