JELLOUS POLYURETHANE FOAM DRESSING FOR VARIOUS WOUND CLOSING Russian patent published in 2010 - IPC A61L15/26 A61F13/15 

FIELD: medicine.

SUBSTANCE: invention concerns medicine, namely dressings with polymer compositions and can be used in surgery and traumatology for various wound closing. A medical dressing formed on a wound directly ensures its full sterile closing, provides anaesthetic effect, primary disinfection and exudate absorption from the wound of a patient and medical staff and does not require additional fixation. The dressing consists of a polyol component containing high-molecular simple oligoesterpolyol based on propylene oxide and ethylene oxide, water, an urethane formation activator, an isocyanate component containing mixed isomers of dimethylmethane diisocyanate, an activation additive consisting of the extension of polyurethane chain, a foam opener. The activation additive also contains a foaming agent. The activator is mixed amines and organotin compounds. The isocyanate component has the isocyanate group content 26.0-32 wt % in the following ratio in the composition, weight fractions: high-molecular oligoesterpolyol - 100, water - 2.0-4.0, the foaming agent - 2.0-4.0, the urethane formation activator - 0.05-0.4, the chain extension - 0.2-1.5, the foam opener - 0.2-1.5, the foam hardener - 0.2-1.5, the isocyanate component - 30-60.

EFFECT: extended temperature range of dressing use to 5°C, elimination of collateral pain sensations in patients (reduced temperature of reaction), further improvement of absorption properties and reduced cost price of the dressing.

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