SILOXANE-CONTAINING POLYURETHANE-UREA COMPOSITIONS

1 - 40 . (canceled)

41 . A polyurethane-urea elastomeric composition comprising a soft segment and a hard segment, wherein the soft segment is formed from:

a macrodiol comprising a polysiloxane macrodiol and a polyether macrodiol;

and wherein the hard segment is formed from:

a diisocyanate; and

a first chain extender diamine compound of formula (I):

wherein

R is hydrogen or an optionally substituted straight chain, branched or cyclic, saturated or unsaturated hydrocarbon radical;

R 1 , R 2 , R 3 , and R 4 are each independently hydrogen or an optionally substituted straight chain, branched or cyclic, saturated or unsaturated hydrocarbon radical;

R 5 and R 6 are each independently an optionally substituted straight chain, branched or cyclic, saturated or unsaturated hydrocarbon radical;

R 7 is a divalent linking group or an optionally substituted straight chain, branched or cyclic, saturated or unsaturated hydrocarbon radical;

n is an integer of 1 to 4; and

the molecular weight of the compound of formula (I) is about 500 or less; and

a second chain extender selected from the group consisting of: 1,4-butanediol; 1,2-ethylenediamine; ethanolamine; hexamethylenediamine; 1,4-butanediamine; water; and combinations thereof.

42 . The composition of claim 41 wherein the weight ratio of polysiloxane macrodiol to polyether macrodiol in the composition is about 1:99 to about 99:1.

43 . The composition of claim 41 wherein the weight ratio of polysiloxane macrodiol to polyether macrodiol is about 75:25 to about 85:15.

44 . The composition of claim 41 wherein the weight percentage of the macrodiol in the composition is about 60 wt. % to about 40 wt. %.

45 . The composition of claim 41 wherein the diisocyanate is MDI.

46 . (canceled)

47 . A polyurethane-urea elastomeric composition comprising a soft segment and a hard segment, wherein the soft segment is formed from:

a macrodiol comprising a polysiloxane macrodiol and a polycarbonate macrodiol; and the hard segment is formed from:

a diisocyanate; and

a first chain extender diamine compound of formula (I):

wherein

R is hydrogen or an optionally substituted straight chain, branched or cyclic, saturated or unsaturated hydrocarbon radical;

R 1 , R 2 , R 3 , and R 4 are each independently hydrogen or an optionally substituted straight chain, branched or cyclic, saturated or unsaturated hydrocarbon radical;

R 5 and R 6 are each independently an optionally substituted straight chain, branched or cyclic, saturated or unsaturated hydrocarbon radical;

R 7 is a divalent linking group or an optionally substituted straight chain, branched or cyclic, saturated or unsaturated hydrocarbon radical;

n is an integer of 1 to 4; and

the molecular weight of the diamine compound of formula (I) is about 500 or less;

and

a second chain extender selected from the group consisting of: 1,4-butanediol;

1,2-ethylenediamine; ethanolamine; hexamethylenediamine; 1,4-butanediamine; water; and combinations thereof,

wherein the level of hard segment in the composition is about 21.8 wt. % to about 60 wt. %.

48 . A biomaterial that is manufactured from a composition of claim 41 or claim 47 .

49 . A medical device, article or implant composed wholly or partly of the composition of claim 41 or claim 47 .

50 . The medical device, article or implant of claim 49 which is a cardiac pacemaker, defibrillator, electromedical device, catheters, cannula, implantable prostheses, cardiac assist device, heart valve, vein valve, vascular graft, extra-corporeal device, pacemaker lead, defibrillator lead, blood pump, balloon pump, A-V shunt, biosensor, membranes for cell encapsulation, drug delivery device, wound dressing, artificial joint, orthopaedic implant, or soft tissue replacement.

51 . A device or article composed wholly or partly of the composition of claim 47 .

52 . The device or article of claim 51 which is artificial leather, a shoe sole, cable sheathing, varnish, coating, structural components for a pump, structural components for a vehicle, mining ore screen, conveyor belt, laminating compound, textile, separation membrane, sealants or a component of an adhesive.