HOME
SEARCH
RSS FEED
SUBSCRIBE
Silicone-Urea and Silicone-Urethane Segmented Terpolymers also Containing Polyether and Polyester Soft Segments and Their Method of Preparation
Case ID:
04.037
Web Published:
9/3/2012
Novel synthetic techniques were developed for the preparation of siloxane-urea segmented copolymers containing a gradient polyether interphase, with controlled morphologies and properties. This new process allows the preparation of high molecular weight, high strength siloxane-urea copolymers with urea hard segment contents ranging from 10 to over 40% by weight. Polymer properties that can independently be controlled include modulus (10 to 120 MPa), ultimate tensile strength (2.5 to 22 MPa). level of equilibrium water absorption (~0 to 100% by weight) and refractive index (1.43 to 1.46).
Patent Information:
App Type
Country
Serial No.
Patent No.
File Date
Issued Date
Patent Status
US Utility
*United States
11/152,844
7,262,260
6/15/2005
8/28/2007
Abandoned
Category(s):
Materials
Chemicals
Bookmark this page
Download as PDF
For Information, Contact:
Li Chen
Licensing Associate
Virginia Tech Intellectual Properties, Inc.
(540) 443-9217
lchen@vtip.org
Inventors:
Iskender Yilgor
Emel Yilgor
Garth Wilkes
Jignesh Sheth
Keywords:
Materials/Polymers