| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an aqueous dispersion type polyurethane-based resin having sufficient shape-retaining properties and film-forming properties together with sufficient elasticity in case of using the resin as a urine collection catheter. <P>SOLUTION: The polyurethane-based resin comprises at least the following components (A) and (B) and has ≤5% shrinkage percentage at the time of film formation, and the permanent elongation of the component (A) and the permanent elongation of the polyurethane in the component (B) are within respective predetermined ranges. (A) component: an HM-containing PU (HM: hexamethylene diisocyanate and/or trimethylene diisocyanate; PU: polyurethane) having a structure consisting of a predetermined polyvalent isocyanate and a polyol containing a predetermined polyol as a repeating unit, or, an HMPU (HM-containing PU)-VP composite resin which is a polyurethane-vinyl polymer composite resin comprising the HM-containing PU and a vinyl polymer; and (B) component: a polyurethane except the HM-containing PU, or a polyurethane-vinyl polymer composite resin comprising the polyurethane except the HM-containing PU and a vinyl polymer. <P>COPYRIGHT: (C)2008,JPO&INPIT |
