Polyurethane comprising graphene nano structure

A cast elastomer comprising a reaction product of:

• (A) 19 wt.-% to 98 wt.-% of at least one isocyanate component,
• (B) 2 wt.-% to 80 wt.-% of at least one polyol component,
• (C) 0.1 wt.-% to 6 wt.-% of graphene nano platelets having an oxygen content in a range of 0.01 wt.-% to 10 wt.-% based on a total weight of the graphene nano platelets, and
• (D) 4 wt.-% to 30 wt.-% of at least one cross-linker or a chain extender,
• wherein the wt.-% is based on a total weight of the cast elastomer and
• wherein the cast elastomer has a hard segment content in a range of 50% to 97%, the hard segment content being defined by a formula:
• Hard segment content={Σx=1n[mCE/EWCE]/[mICN/EWICN]}×100%
• wherein,
• mCE is a mass of the at least one cross linker or the chain extender in g,
• EWCE is an equivalent weight of the at least one cross linker or the chain extender in g/eq,
• mICN is a mass of the at least one isocyanate component in g,
• EWICN is an equivalent weight of the at least one isocyanate component in g/eq, and
• n is a number of cross linker or chain extender and the isocyanate.