Patent ID: 8512834
Filing Date: 2013-08-20
Classification: C08G,C08K,Y10T

Abstract:
1. A polyurethane that is a reaction product of reaction components, the reaction components comprising: (a) a polyol; (b) a polyisocyanate selected from an aromatic, alicyclic or aliphatic polyisocyanate or combinations thereof; (c) a mixture of chain extenders that includes (i) a chain extender having a sulfur bridge in an amount of between 1 and 30 weight percent of the total mixture of claim extenders and (ii) a main chain extender, wherein the chain extender having a sulfur bridge is characterized as wherein R1 and R2 are selected from an OH, an NH2 or combinations thereof, wherein A and B are selected from a divalent aliphatic, alicyclic or aromatic organic group or combinations thereof, wherein A and B may be the same or different and wherein x is an integer of between 2 and 10; and (d) free sulfur in an amount of between 0.5 and 10 wt. % of the polyol.