Protein non-adsorptive polyurea-urethane polymer coated devices
First Claim
1. A biocompatible, protein non-adsorptive medical or laboratory device having a polymer coating on at least one surface thereof in which the polymer of said polymer coating is a hydrophilic, biocompatible hydrated polyurea-urethane polymer gel derived from prepolymer units at least 75% of which are oxyethylene-based diols or polyols having molecular weights of about 7000 to about 30,000, said diols or polyols having essentially all of the hydroxyl groups capped with polyisocyanate, said hydrated polymer gel characterized by transparency and by a surface having improved resistance to nonspecific protein adsorption, an formed by reacting said prepolymer units with water.
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Abstract
Polymer-coated medical and laboratory devices are disclosed which are characterized by their biocompatibility and resistance to nonspecific protein adsorption. The polyurea-polyurethane coatings of this invention are prepared from high molecular weight isocyanate end-capped prepolymers substantially or exclusively comprised of ethylene oxide units. At least 75%, preferably at least 90%, of the prepolymer units are oxyethylene-based diols or polyols having molecular weights of about 7000-30,000, with essentially all of the hydroxyl groups capped with polyisocyanate prior to formation of the hydrated polymer coating.
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27 Claims
- 1. A biocompatible, protein non-adsorptive medical or laboratory device having a polymer coating on at least one surface thereof in which the polymer of said polymer coating is a hydrophilic, biocompatible hydrated polyurea-urethane polymer gel derived from prepolymer units at least 75% of which are oxyethylene-based diols or polyols having molecular weights of about 7000 to about 30,000, said diols or polyols having essentially all of the hydroxyl groups capped with polyisocyanate, said hydrated polymer gel characterized by transparency and by a surface having improved resistance to nonspecific protein adsorption, an formed by reacting said prepolymer units with water.
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15. A method for improving medical or laboratory devices to increase biocompatibility and resistance to protein binding, comprising
a) preparing a prepolymer-organic solvent solution, at least 75% of the prepolymer units of said prepolymer consisting of oxyethylene-based diols or polyols having molecular weights of about 7000 to about 30,000, said diols or polyols having essentially all of the hydroxyl groups capped with polyisocyanate, b) depositing said solution on a medical or laboratory device or portion thereof, c) forming a coating on said device, and d) reacting said coated device with water to promote crosslinking.
Specification