The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 2014
Filed:
Feb. 15, 2008
David Myung, Santa Clara, CA (US);
Laura Hartmann, San Francisco, CA (US);
Jean Noolandi, Palo Alto, CA (US);
Christopher N. Ta, Saratoga, CA (US);
Curtis W. Frank, Cupertino, CA (US);
David Myung, Santa Clara, CA (US);
Laura Hartmann, San Francisco, CA (US);
Jean Noolandi, Palo Alto, CA (US);
Christopher N. Ta, Saratoga, CA (US);
Curtis W. Frank, Cupertino, CA (US);
The Board of Trustees of the Leland Stanford Junior University, Palo Alto, CA (US);
Abstract
A strain-hardened interpenetrating polymer network (IPN) hydrogel is provided. The interpenetrating polymer network hydrogel is based on two different networks. The first network is a non-silicone network of preformed hydrophilic non-ionic telechelic macromonomers chemically cross-linked by polymerization of its end-groups. The second network is a non-silicone network of ionizable monomers. The second network has been polymerized and chemically cross-linked in the presence of the first network and has formed physical cross-links with the first network. An aqueous salt solution having a neutral pH is used to ionize and swell the second network in the interpenetrating polymer network. The swelling of the second network is constrained by the first network, and this constraining effect results in an increase in effective physical cross-links within the interpenetrating polymer network, and, in turn, an increase its elastic modulus. The strain-hardened interpenetrating polymer network hydrogel is attractive and useful for medical, industrial, and personal hygiene purposes.