US 11,970,568 B2
Ski boots with temperature-independent modulus of elasticity
Oliver Steffen Henze, Lemfoerde (DE); Denis Bouvier, Lyons (FR); Henning Wettach, Ludwigshafen am Rhein (DE); and Fin Lammers, Lemfoerde (DE)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 16/972,305
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Jun. 5, 2019, PCT No. PCT/EP2019/064694
§ 371(c)(1), (2) Date Dec. 4, 2020,
PCT Pub. No. WO2019/234117, PCT Pub. Date Dec. 12, 2019.
Claims priority of application No. 18176321 (EP), filed on Jun. 6, 2018.
Prior Publication US 2021/0230349 A1, Jul. 29, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08G 18/32 (2006.01); A43B 5/04 (2006.01); C08G 18/08 (2006.01); C08G 18/10 (2006.01); C08G 18/48 (2006.01); C08G 18/66 (2006.01); C08G 18/76 (2006.01); B29D 35/00 (2010.01); B29K 75/00 (2006.01)
CPC C08G 18/6674 (2013.01) [A43B 5/0486 (2013.01); C08G 18/0895 (2013.01); C08G 18/3206 (2013.01); C08G 18/4808 (2013.01); C08G 18/4854 (2013.01); C08G 18/7671 (2013.01); B29D 35/0009 (2013.01); B29K 2075/00 (2013.01)] 11 Claims
 
1. A process for producing a ski shoe or a part of a ski shoe, the process comprising:
producing a ski shoe or a part of a ski shoe from a thermoplastic polyurethane (TPU-1) obtained by reaction of an isocyanate composition (IZ) comprising 4,4′-diphenylmethanediisocyanate (MDI) with a polyol composition (PZ), comprising a polyol (P1) and a chain extender (KV1),
wherein the polyol (P1) comprises a polytetrahydrofuran having an average molecular weight Mn in a range of from 1300 to 1700 g/mol,
wherein the chain extender (KV1) comprises 1,3-propanediol, 1,4-butanediol, or 1,6-hexanediol, and
wherein the thermoplastic polyurethane has a hard phase fraction greater than 0.40, and wherein the hard phase fraction is defined by formula (I)

OG Complex Work Unit Math
wherein
MKvx is molar mass of the chain extender x in g/mol,
mKvx is mass of the chain extender x in g,
MIso is molar mass of the isocyanate in g/mol,
mges is total mass of all starting materials in g, and
x is a number of chain extenders.