Patent ID: 7256246
Filing Date: 2007-08-14
Classification: C08F,G02B

Abstract:
1. A method comprising the steps of polymerizing, via free radical polymerization, HEMA monomer having less than about 0.5% crosslinker and optionally at least one hydrophilic or hydrophobic comonomer to form a high polydispersity poly-HEMA having a peak molecular weight between about 25,000 and about 100,000 and a polydispersity greater than about 2.2 and about 4 respectively, and purifying said high polydispersity poly-HEMA to form a low polydispersity poly-HEMA having a peak molecular weight between about 25,000 and about 100,000 and a polydispersity of less than about 2 to less than about 3.8 respectively.