Proppant

A proppant for hydraulically fracturing a subterranean formation, said proppant comprising:

• A. a particle present in an amount of from 96 to 99 percent by weight based on the total weight of said proppant;
• and
• B. a polyurethane coating disposed about said particle and present in an amount of from 1.0 to 4.0 percent by weight based on the total weight of said proppant, said polyurethane coating comprising the reaction product of:
• an isocyanate component present in an amount of from 19.9% to 53.1% by weight based on the total weight of all components included in the isocyanate component, and
• an isocyanate-reactive component comprising 70% to 90% of a polybutadiene and 10% to 30% of a chain extender, based on the total weight of all components included in the isocyanate-reactive component,
• wherein the isocyanate component is selected from the group consisting of diphenylmethane diisocyanates (MDIs), polymeric diphenylmethane diisocyanates (pMDIs), toluene diisocyanates (TDIs), hexamethylene diisocyanates (HDIs), isophorone diisocyanates (IP-DIs), and combinations thereof,
• wherein said chain extender comprises an alkylene glycol selected from the group consisting of propylene glycol, dipropylene glycol, tripropylene glycol, and combinations thereof, and
• wherein said polybutadiene comprises no less than 50 percent by weight 1,2-vinyl units based the total weight of said polybutadiene.