Patent ID: 8481801

Claim:
A wound dressing kit, comprising: (a) a polyurethane prepolymer, comprising an isocyanate capped prepolymer and a compound selected from the group consisting of castor oil, other esters of ricinoleic acid, and derivatives thereof, wherein the polyurethane prepolymer is prepared by reacting a disocyanate with the compound selected from the group consisting of castor oil, glycerol mono- or diester of ricinoleic acid and other ricinoleic acid derivatives thereof; and (b) a curing agent for the polyurethane prepolymer; wherein components (a) and (b) are stored separately in a single package for mixing immediately before use to form a combined preparation; and wherein a portion of the isocyanate capped prepolymer remains uncured resulting in a soft and flexible polyurethane having a dry tensile strength of at least 5N/cm 2 .