Polyurethane foam sponge and wound dressing having the same
AssigneeTronjen Medical Technology Inc.
InventorsSzu-Hsien Chen, Ya-Wen Ku, Ren-Shian Wang, Chiu-Fang Chen
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Abstract
Disclosed herein is a polyurethane foam sponge produced by the steps of a) providing an hydrophobic polyol which has six hydroxyl groups, b) providing a hydrophilic diisocyanate obtained by reacting a diisocyanate with a hydrophilic polyether diol, c) reacting the hydrophobic polyol with the hydrophilic diisocyanate to obtain a prepolymer which includes 3 to 6 isocyanate groups, and d) mixing the prepolymer with a hydrophilic polyether polyol, a blowing agent, an end-capping agent, a reinforcing agent, and a catalyst to obtain the polyurethane foam sponge. A wound dressing including the polyurethane foam sponge is also disclosed.
Claims13
A polyurethane foam sponge produced by the steps of:
- a) providing a hydrophobic polyol which has six hydroxyl groups, and which is obtained by:
- a-1) reacting a branched triol with a first diisocyanate to obtain a triisocyanate intermediate, and
- a-2) reacting the triisocyanate intermediate with a hydrophobic polyether triol;
- b) providing a hydrophilic diisocyanate obtained by reacting a second diisocyanate with a hydrophilic polyether diol;
- c) reacting the hydrophobic polyol with the hydrophilic diisocyanate to obtain a prepolymer
- which includes 3 to 6 isocyanate groups;
- and
- d) mixing the prepolymer with a hydrophilic polyether polyol, a blowing agent, an end-capping agent, a reinforcing agent, and a catalyst to obtain the polyurethane foam sponge.
Dependencies are inferred from the claim text.