Disclosed is a polyurethane for use in a polishing layer, including a carboxylic acid ester group, and a polyurethane preferably having a carboxylic acid ester group in at least one of a side chain, a main chain terminal, and a main chain skeleton is preferably used. Also disclosed is a method for modifying a polishing layer, including the steps of: preparing a polishing layer including a polyurethane having a carboxylic acid ester group; and hydrolyzing the carboxylic acid ester group of the polyurethane, to produce a carboxyl group.

The present invention relates to curable polyurethane polymers made from renewable materials and having polymerization accelerator groups built into the polymer. In particular hydroxylated oleaginous materials derived from plant oils, such as soybean oil, are used. These renewable materials may be formed into curable polyurethane polymers having different chemical functionalities and cure mechanisms.

The present invention relates to curable polyurethane polymers made from renewable materials and having polymerization accelerator groups built into the polymer. In particular hydroxylated oleaginous materials derived from plant oils, such as soybean oil, are used. These renewable materials may be formed into curable polyurethane polymers having different chemical functionalities and cure mechanisms.

A plasma separation device including a blood inlet and a plasma outlet, the blood inlet comprising an inlet tunnel configured for loading a whole blood sample and a first chamber configured for collecting the whole blood sample; the plasma outlet comprising a second chamber for collecting plasma separated from the whole blood; the device comprising an anti-fouling membrane disposed between the blood inlet and the plasma outlet, the anti-fouling membrane comprising a zwitterionic polyurethane or pre-polymer thereof, wherein the zwitterionic polyurethane or pre-polymer thereof comprises a monomeric unit comprising a zwitterion or precursor thereof and optionally a monomeric unit derived from a polyol, wherein the monomeric unit derived from a polyol is present in a molar ratio in a range of about 0 to about 0.80 relative to the combined amount of monomeric unit derived from a polyol and the monomeric unit comprising a zwitterion or precursor thereof.

Disclosed is a polyurethane for use in a polishing layer, including a carboxylic acid ester group, and a polyurethane preferably having a carboxylic acid ester group in at least one of a side chain, a main chain terminal, and a main chain skeleton is preferably used. Also disclosed is a method for modifying a polishing layer, including the steps of: preparing a polishing layer including a polyurethane having a carboxylic acid ester group; and hydrolyzing the carboxylic acid ester group of the polyurethane, to produce a carboxyl group.