STABILIZED POLYMERS FOR USE WITH ANALYTE SENSORS AND METHODS FOR MAKING AND USING THEM
First Claim
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1. A composition of matter comprising a polymer formed from a mixture comprising:
- a diisocyanate;
a siloxane;
a hydrophilic diol or hydrophilic diamine; and
a polymer stabilizing compound, wherein the polymer stabilizing compound;
has a molecular weight of less than 1000 g/mol;
comprises a benzyl ring having at least one hydroxyl moiety (ArOH).
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Abstract
Embodiments of the invention provide analyte sensors having elements designed to modulate their chemical reactions as well as methods for making and using such sensors. In certain embodiments of the invention, the sensor includes an analyte modulating membrane that comprises a linear polyurethane/polyurea polymer comprising one or more agents selected for their ability to stabilize the polymers against thermal and/or oxidative degradation.
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Citations
20 Claims
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1. A composition of matter comprising a polymer formed from a mixture comprising:
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a diisocyanate; a siloxane; a hydrophilic diol or hydrophilic diamine; and a polymer stabilizing compound, wherein the polymer stabilizing compound;
has a molecular weight of less than 1000 g/mol;comprises a benzyl ring having at least one hydroxyl moiety (ArOH). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 12)
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10. An analyte sensor system comprising:
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a probe adapted to be inserted in vivo, wherein the probe includes an electrode array comprising; a working electrode, a counter electrode; and
a reference electrode;an analyte sensing layer disposed on the working electrode; an analyte modulating layer disposed on the analyte sensing layer, wherein the analyte modulating layer comprises a polyurethane/polyurea polymer formed from a mixture comprising; (a) a diisocyanate; (b) a hydrophilic polymer comprising a hydrophilic diol or hydrophilic diamine; (c) a siloxane having an amino, hydroxyl or carboxylic acid functional group at a terminus; and (d) a polyurethane/polyurea polymer stabilizing compound selected for its ability to inhibit thermal and oxidative degradation of polyurethane/polyurea polymers formed from the mixture, wherein the polyurethane/polyurea polymer stabilizing compound; has a molecular weight of less than 1000 g/mol; comprises a benzyl ring having at least one hydroxyl moiety (ArOH). - View Dependent Claims (11, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification