POLYURETHANE

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

R 1 -A-S x —B—R 2

wherein R 1 and R 2 are selected from an OH, an NH 2 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) an enhancer selected from free sulfur, a rubber curing accelerator or combinations thereof.

2 . The polyurethane of claim 1 , wherein the enhancer is the rubber curing accelerator.

3 . The polyurethane of claim 2 , wherein the rubber curing accelerator is diphenyl guanidine.

4 . The polyurethane of claim 2 , wherein the reaction components comprise between 90 and 110 mole percent of the sulfur bridge chain extender moles.

5 . The polyurethane of claim 2 , wherein the reaction components comprise between 0.5 and 10 weight percent of the polyol.

6 . The polyurethane of claim 1 , wherein the enhancer is the free sulfur.

7 . The polyurethane of claim 1 , wherein the main chain extender carries no cationic group.

8 . The polyurethane of claim 1 , wherein the main chain extender is a short-chained chain extender.

9 . The polyurethane of claim 1 , wherein the main chain extender is selected from 1,2, ethanediol, 1,2 propanediol, 1,2 butanediol, ethylene diamine, 1,2 propane diamine, propylene diamine, propylenediol, 4,4′-methylene bis-(3-chloro-2,6-diethylaniline) (MCDEA), 4,4′-methylene bis(2-chloroaniline) (MOCA), diethylthiotoluenediamine (DETDA) and dimethylthiotoluenediamine (DMTDA) or combinations thereof.

10 . The polyurethane of claim 1 , wherein the main chain extender is selected from a dialcohol, a diamine or combinations thereof.

11 . The polyurethane of claim 1 , wherein the mixture of chain extenders includes the chain extender having a sulfur bridge in an amount of between 2 and 25 weight percent of the total mixture of claim extenders.

12 . The polyurethane of claim 1 , wherein the mixture of chain extenders includes the chain extender having a sulfur bridge in an amount of between 5 and 15 weight percent of the total mixture of claim extenders.

13 . The polyurethane of claim 1 , wherein the polyisocyanate is a diisocyanate.

14 . The polyurethane of claim 1 , wherein the chain extender having a sulfur bridge is selected from 2,2 dithiodiethanol, 4,4-dithiodianiline or combinations thereof.

15 . The polyurethane of claim 1 , wherein x is an integer between 2 and 5.

16 . The polyurethane of claim 1 , wherein the polyurethane is moldable.

17 . An apparatus, comprising:

the polyurethane of claim 1 disposed on at least one surface of a metal substrate.

18 . The apparatus of claim 17 , wherein the polyurethane is of claim 2 .

19 . The apparatus of claim 18 , wherein the metal substrate is a metal reinforcement element.

20 . The apparatus of claim 17 , wherein the metal substrate is a metal reinforcement element.

21 . The apparatus of claim 17 , wherein the apparatus is a conduit, wherein one or more walls of the conduit comprise the polyurethane elastomer of claim 1 and the one or more walls are reinforced with the metal substrate embedded therein.

22 . The apparatus of claim 17 , wherein the apparatus is a conveyer belt.

23 . The apparatus of claim 17 , wherein the apparatus is a caster.