Alcohol-resistant siliconized polycarbonate polyurethanes and medical devices incorporating the same

A catheter comprising:

• an extruded shaft comprising:
• a lumen extending from a proximal end to a distal end of the shaft;
• and
• a sidewall that defines at least a portion of the lumen, the sidewall comprising an alcohol-resistant siliconized polycarbonate polyurethane that comprises:
• a polycarbonate polyol having a structure according to formula (I):
• wherein R is selected from a linear or branched, substituted or unsubstituted C1-C24 alkylene group;
• A is selected from hydrogen (H) or R′OH;
• R′ is selected from a linear or branched, substituted or unsubstituted C1-C24 alkylene group and is either the same as or different from R;
• and n is an integer from 2 to 30;
• a polysiloxane having a structure according to formula (IV):
• wherein R1 and R2 are independently selected from a linear C1-C6 alkyl group or a hydrogen group, R3 and R5 are independently selected from a C1-C12 alkylene group, R4 and R6 are independently selected from a C1-C8 alkylene group, and m is an integer from 2 to 30;
• an isocyanate;
• and
• a chain extender,
• the alcohol-resistant siliconized polycarbonate polyurethane comprising:
• a hard segment;
• a soft segment that comprises the polysiloxane in an amount of from 5 wt % to 15 wt %;
• and
• an isocyanate index of from 1.01 to 1.06.