Patent ID: 11970568
Assignee: BASF SE
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  A  B | IPC A  B  C

Claim 0:
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), Hard
       ⁢
          
       phase
       ⁢
          
       fraction
      
      =
      
       
        {
        
         
          ∑
          
           x
           =
           1
          
          x
         
         
          [
          
           
            
             (
             
              
               m
               
                K
                ⁢
                V
                ⁢
                x
               
              
              /
              
               M
               KVx
              
             
             )
            
            *
            
             M
             
              I
              ⁢
              s
              ⁢
              o
             
            
           
           +
           
            m
            KVx
           
          
          ]
         
        
        }
       
       /
       
        m
        
         g
         ⁢
         e
         ⁢
         s
        
       
      
     
     ,
    
   
   
    
     (
     I
     )
    
   
  
 

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.