Polyisobutylene-based polyurethanes, polyureas and/or polyurethane-polyureas and method for making same

A PIB-based polymer composition comprising:

• (i) from about 55 weight percent to about 75 weight percent of one or more soft segments;
• (ii) from about 15 weight percent to about 40 weight percent of one or more hard segments;
• and
• (iii) from about 2 weight percent to about 30 weight percent of one or more hydrogen bond acceptor chain extender (HACE) segments.

A method of making a PIB-based polymer composition, the method comprising the steps of:

• (I) combining one or more amine telechelic PIBs, one or more hydroxyl telechelic PIBs, or a combination thereof with one or more diisocyanates to yield a mixture;
• (II) adding at least one catalyst to the mixture formed in Step (I) and reacting the mixture with the catalyst to yield a prepolymer;
• (III) adding one or more chain extenders and one or more hydrogen bond acceptor chain extender (HACE) compounds to the prepolymer;
• (IV) reacting the mixture of the prepolymer, the one or more chain extenders and the one or more hydrogen bond acceptor chain extender (HACE) compounds to yield a PIB-based polymer;
• and
• (V) collecting the PIB-based polymer.