The present invention relates to an amphiphilic polymer copolymer composed of a prepolymer polymerized by reacting polyol (P) and diisocyanate (R) and a chain-extender comprising one or more hydrophilic or hydrophobic functional groups (E.sub.1 or E.sub.2) and a method for preparing the same. Such a polymer is a biocompatible polymer as a thermoplastic polyurethane polymer, and it can be used as various medical polymers, and it has an advantage that a process can be simplified as it is easier to prepare and configure than the conventional blended medical polyurethane.

Caprolactone polyols and polyurethane materials, prepolymers, and polyurethane elastomers including the same are described herein. The caprolactone polyol is made by a process including admixing caprolactone monomers and pentaspiroglycol (PSG) to form an initiator-caprolactone mixture or reaction mixture, adding one or more catalyst to the initiator-caprolactone mixture to form a reaction mixture, and polymerizing, such as ring opening polymerization, the caprolactone monomers in the reaction mixture, thereby forming the caprolactone polyol. The polyurethane elastomers includes a reaction product of one or more caprolactone polyol, optionally one or more additional polyol, and one or more isocyanate comprising two or more isocyanate groups. The polyurethane elastomers described herein have improved stain resistance, as compared to standard, commercially available polyols. Methods of making and using the caprolactone polyol and the prepolymer compositions, polyurethane materials, or polyurethane elastomers, as well as articles comprising or prepared from the same, are also described herein.

Caprolactone polyols and prepolymer compositions, polyurethane dispersions, or waterborne polyurethanes including the same are described herein. The caprolactone polyol is made by a process including admixing caprolactone monomers and pentaspiroglycol (PSG) to form an initiator-caprolactone mixture or reaction mixture, adding one or more catalyst to the initiator-caprolactone mixture to form a reaction mixture, and polymerizing, such as ring opening polymerization, the caprolactone monomers in the reaction mixture, thereby forming the caprolactone polyol. The films or coatings comprising or produced from the prepolymer compositions, polyurethane dispersions, or waterborne polyurethanes described herein have improved mechanical properties and chemical resistance, as compared to standard, commercially available polyols. Methods of making and using the caprolactone polyol and the prepolymer compositions, polyurethane dispersions, or waterborne polyurethanes, as well as films or coating comprising or prepared from the same, are also described herein.

The present invention provides a coating agent for a vapor deposited film, the coating agent containing a urethane resin (A) and an aqueous medium (B), the urethane resin (A) being a reaction product of a composition that contains a polyester (A3) which is a polycondensate of a polycarboxylic acid component (A1) and a polyhydric alcohol component (A2), an active hydrogen group-containing compound (A4) having a hydrophilic group, and a diisocyanate (A5), the urethane resin (A) having an ester skeleton derived from the polyester (A3), the polycarboxylic acid (A1) containing at least one of an aromatic dicarboxylic acid and an acid anhydride thereof in an amount of 10 to 100% by mass based on 100% by mass of a total amount of the polycarboxylic acid (A1), the polyhydric alcohol component (A2) containing an alkylene glycol having 2 to 6 carbon atoms.

The present disclosure relates to solvent-borne coating compositions comprising a water-dispersible polyisocyanate, a method of coating a substrate using such compositions, a substrate comprising the cured coating composition, and the use of water-dispersible polyisocyanates in solvent-borne coating compositions for improving chemical, scratch and/or mar resistance of such coatings.