US 11,746,179 B2
Polyurethane with delayed relaxation behaviour for compression products
Christa Huger, Kulmbach (DE); Angelika Scherm, Immenreuth (DE); Seema Agarwal, Marburg (DE); Andreas Greiner, Amöneburg (DE); and Pin Hu, Bayreuth (DE)
Assigned to MEDI GMBH & CO. KG, Bayreuth (DE)
Appl. No. 16/636,493
Filed by MEDI GMBH & CO. KG, Bayreuth (DE)
PCT Filed Aug. 8, 2018, PCT No. PCT/EP2018/071535
§ 371(c)(1), (2) Date Feb. 4, 2020,
PCT Pub. No. WO2019/030297, PCT Pub. Date Feb. 14, 2019.
Claims priority of application No. 17185611 (EP), filed on Aug. 9, 2017.
Prior Publication US 2020/0270388 A1, Aug. 27, 2020
Int. Cl. C08G 18/24 (2006.01); C08G 18/08 (2006.01); A61F 13/08 (2006.01); C08G 18/32 (2006.01); C08G 18/38 (2006.01); C08G 18/48 (2006.01); C08G 18/66 (2006.01); C08G 18/76 (2006.01); C08L 75/04 (2006.01)
CPC C08G 18/0814 (2013.01) [A61F 13/08 (2013.01); C08G 18/246 (2013.01); C08G 18/3206 (2013.01); C08G 18/3821 (2013.01); C08G 18/4854 (2013.01); C08G 18/6685 (2013.01); C08G 18/7671 (2013.01); C08L 75/04 (2013.01); C08G 2280/00 (2013.01); C08L 2201/12 (2013.01); C08L 2203/02 (2013.01); C08L 2205/025 (2013.01); C08L 2205/03 (2013.01)] 18 Claims
 
1. A compression product comprising an elastic component or material, the elastic component or material having a delayed continuous relaxation behavior, the elastic material being capable of applying a compression or a supporting force or a local pressure to a part of the body of a subject, the elastic material furthermore being capable of passing through a first phase during which the material is expanded, a second phase during which the component or material relaxes without recovering its original shape, and a third phase during which the component or material recovers its original shape with successive deceleration, wherein relaxation is self-initiated in the absence of an external stimulus,
wherein the relaxation behavior is delayed in time as compared to an elastic component or material not containing N-diol,
wherein the elastic component or material comprises:
(a) a non-quaternized polyurethane (PU) polymer containing N-diol (PU-N);
and/or
(b) a quaternized polyurethane (PU) polymer or ionomer containing quaternized N-diol (PU-N+);
and, optionally,
(c) elastane.