TEMPERATURE-CONTROLLED PROCESS FOR PREPARATION OF HOMOGENEOUS POLYMERS

摘要

A process which allows for the preparation of a substantially uniform hydrogel, such as a polyacrylamide hydrogel, wherein the uniformity of the hydrogel, im terms of the rheological properties, is established by limiting the temperature differential in the reaction process to a very narrow range, such as no more than 5 DEG C. This process allows for polymers novel in their uniformity also by means of being suitably a continuous process. A continuous process for the preparation of a substantially uniform hydrogel, such as a polyacrylamide hydrogel, led to high uniformity by preventing unreacted monomers, such as acrylamide, from surpassing the gel front in the pipe reactor. This was achieved by use of a static mixer. Polymer hydrogel are rendered biocompatible by means of a novel washing process wherein the polymer specific surface area is appropriately set.