Polysiloxane-containing polyurethane elastomeric compositions

A polyurethane elastomeric composition comprising a hard segment and a soft segment wherein the soft segment is formed from about (a) 60 wt. % to about 98 wt. % of at least one polysiloxane macrodiol;

• and (b) about 2 wt. % to about 40 wt. % of at least one polyether macrodiol, about 2 wt. % to about 40 wt. % of at least one polycarbonate macrodiol, or about 2 wt. % to about 40 wt. % of a combination of at least one polyether macrodiol and at least one polycarbonate macrodiol, wherein the polyether macrodiol is a compound of the formula:
• wherein m is an integer of 4 or more;
• and
• n is an integer from 2 to 50;
• and
• wherein the hard segment is present in about 30 wt. % to about 60 wt. % of the polyurethane elastomeric composition and wherein the soft segment is present in about 40 wt. % to about 70 wt. % of the polyurethane elastomeric composition.

A device or article comprising an amount of a polyurethane elastomeric composition effective to render the device biocompatible, the polyurethane elastomeric composition comprising a hard segment and a soft segment, wherein the soft segment is formed from (a) about 2 wt. % to about 40 wt. % of at least one polyether macrodiol, about 2 wt. % to about 40 wt. % of at least one polycarbonate macrodiol, or about 2 wt. % to about 40 wt. % of a combination of at least one polyether macrodiol and at least one polycarbonate macrodiol, wherein the polyether macrodiol is a compound of the formula:

• wherein m is an integer of 4 or more;
• and
• n is an integer from 2 to 50;
• and (b) about 60 wt. % to about 98 wt. % of at least one polysiloxane macrodiol of formula (I):
• wherein
• R1, R2, R3, R4, R5, and R6 are each independently an optionally substituted straight chain, branched or cyclic, saturated or unsaturated hydrocarbon radical;
• and
• n is an integer from 1 to 100;
• wherein the hard segment is present in about 30 wt. % to about 60 wt. % of the polyurethane elastomeric composition and wherein the soft segment is present in about 40 wt. % to about 70 wt. % of the polyurethane elastomeric composition.

A device or article comprising a polyurethane elastomeric composition comprising a hard segment and a soft segment, wherein the soft segment is formed from (a) about 2 wt. % to about 40 wt. % of at least one polyether macrodiol, about 2 wt. % to about 40 wt. % of at least one polycarbonate macrodiol, or about 2 wt. % to about 40 wt. % of a combination of at least one polyether macrodiol and at least one polycarbonate macrodiol, wherein the polyether macrodiol is a compound of the formula:

• wherein m is an integer of 4 or more;
• and
• n is an integer from 2 to 50;
• and (b) about 60 wt. % to about 98 wt. % of polysiloxane macrodiol of formula (I):
• wherein
• R1, R2, R3, R4, R5, and R6 are each independently an optionally substituted straight chain, branched or cyclic, saturated or unsaturated hydrocarbon radical;
• and
• n is an integer from 1 to 100;
• wherein the hard segment is present in about 30 wt. % to about 60 wt. % of the polyurethane elastomeric composition and wherein the soft segment is present in about 40 wt. % to about 70 wt. % of the polyurethane elastomeric composition;
• and
• wherein the device is artificial leather, a shoe sole, a cable sheathing, varnish, a coating, a structural component for a pump or vehicle, a mining ore screen, a conveyor belt, a laminating compound, a textile, a separation membrane, a sealant or an adhesive component.

A process for preparing a polyurethane elastomeric composition comprising:

• a) mixing a polysiloxane macrodiol;
• a polyether macrodiol, a polycarbonate macrodiol, or a mixture thereof;
• and a chain extender;
• and
• b) reacting the mixture with a diisocyanate to yield a polyurethane elastomeric composition comprising a hard segment derived from a diisocyanate and a chain extender;
• and a soft segment derived from:
• about 60 wt. % to about 98 wt. % of at least one polysiloxane macrodiol;
• and
• about 2 wt. % to about 40 wt. % of at least one polyether macrodiol, about 2 wt. % to about 40 wt. % of at least one polycarbonate macrodiol, or about 2 wt. % to about 40 wt. % of a combination of at least one polyether macrodiol and at least one polycarbonate macrodiol, wherein the polyether macrodiol is a compound of the fornula:
• wherein m is an integer of 4 or more;
• and
• n is an integer from 2 to 50;
• and
• wherein the hard segment is present in about 30 wt. % to about 60 wt. % of the polyurethane elastomeric composition and wherein the soft segment is present in about 40 wt. % to about 70 wt. % of the polyurethane elastomeric composition.

A process for preparing a polyurethane elastomeric composition comprising:

• b) reacting a diisocyanate a polysiloxate macrodiol;
• and a polyether macrodiol, a polycarbonate macrodiol, or a mixture thereof;
• to form a prepolymer having terminally reactive diisocyanate groups;
• and
• a) reacting the prepolymer with a chain extender to yield a polyurethane elastomeric composition comprising a soft segment derived from (a) about 60 wt. % to about 98 wt. % of at least one polysiloxane macrodiol;
• and (b) about 2 wt. % to about 40 wt. % of at least one polyether macrodiol, about 2 wt. % to about 40 wt. % of at least one polycarbonate macrodiol, or about 2 wt. % to about 40 wt. % of a combination of at least one polyether macrodiol and at least one polycarbonate macrodiol, wherein the polyether macrodiol is a compoind of the formula:
• wherein m is an integer of 4 or more;
• and
• n is an integer from 2 to 50;
• and
• wherein the polyurethane elalstomeric composition comprises a hard segment derived from a diisocyante and a chain extender;
• wherein the hard segment is present in abut 30 wt. % to about 60 wt. % of the polyurethane elastomeric composition and wherein the soft segment is present in about 40 wt. % to about 70 wt. % of the polyurethane elastomeric composition.

A polyurethane elastomeric composition comprising a hard segment and a soft segment, wherein the soft segment is formed from (a) about 2 wt. % to about 40 wt. % of at least one polycarbonate macrodiol, or about 2 wt. % to about 40 wt. % of a copolymer of at least one polyether macrodiol and at least one polycarbonate macrodiol;

• and (b) about 60 wt. % to about 98 wt. % of at least one polysiloxane macrodiol of formula (I):
• wherein
• R1, R2, R3, R4, R5, and R6 are each independently an optionally substituted straight chain, branched or cyclic, saturated or unsaturated hydrocarbon radical;
• and
• n is an integer from 1 to 100;
• wherein the hard segment is present in about 30 wt. % to about 60 wt. % of the polyurethane elastomeric composition and wherein the soft segment is present in about 40 wt. % to about 70 wt. % of the polyurethane elastomeric composition.

A device or article comprising an amount of a polyurethane elastomeric composition effective to render the device biocompatible, the polyurethane elastomeric composition comprising a hard segment and a soft segment, wherein the soft segment is formed from (a) about 2 wt. % to about 40 wt. % of at least one polycarbonate macrodiol, or about 2 wt. % to about 40 wt. % of a copolymer of at least one polyether macrodiol and at least one polycarbonate macrodiol;

• and (b) about 60 wt. % to about 98 wt. % of at least one polysiloxane macrodiol of formula (I):
• wherein
• R1, R2, R3, R4, R5, and R6 are each independently an optionally substituted straight chain, branched or cyclic, saturated or unsaturated hydrocarbon radical;
• and
• n is an integer from 1 to 100;
• wherein the hard segment is present in about 30 wt. % to about 60 wt. % of the polyurethane elastomeric composition and wherein the soft segment is present in about 40 wt. % to about 70 wt. % of the polyurethane elastomeric composition.

A process for preparing a polyurethane elastomeric composition comprising:

• a) mixing a polysiloxane macrodiol;
• a polyether macrodiol, a polycarbonate macrodiol, or a mixture thereof;
• and a chain extender;
• and
• b) reacting the mixture with a diisocyanate to yield a polyurethane elastomeric composition comprising a hard segment derived from a diisocyanate and a chain extender;
• and a soft segment derived from:
• about 60 wt. % to about 98 wt. % of at least one polysiloxane macrodiol;
• and
• about 2 wt. % to about 40 wt. % of at least one polycarbonate macrodiol, or about 2 wt. % to about 40 wt. % of a copolymer of at least one polyether macrodiol and at least one polycarbonate macrodiol;
• wherein the hard segment is present in about 30 wt. % to about 60 wt. % of the polyurethane elastomeric composition and wherein the soft segment is present in about 40 wt. % to about 70 wt. % of the polyurethane elastomeric composition.

A process for preparing a polyurethane elastomeric composition comprising:

• a) reacting a diisocyanate with a polysiloxane macrodiol;
• and a polyether macrodiol, a polycarbonate macrodiol, or a mixture thereof;
• to form a prepolymer having terminally reactive diisocyanate groups;
• and
• b) reacting the prepolymer with a chain extender to yield a polyurethane elastomeric composition comprising a soft segment derived from (a) about 60 wt. % to about 98 wt. % of at least one polysiloxane macrodiol;
• and (b) about 2 wt. % to about 40 wt. % of at least one polycarbonate macrodiol, or about 2 wt. % to about 40 wt. % of a copolymer of at least one polyether macrodiol and at least one polycarbonate macrodiol;
• wherein the polyurethane elastomeric composition comprises a hard segment derived from a diisocyanate and a chain extender;
• wherein the hard segment is present in about 30 wt. % to about 60 wt. % of the polyurethane elastomeric composition and wherein the soft segment is present in about 40 wt. % to about 70 wt. % of the polyurethane elastomeric composition.