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:
Jun. 23, 2015
Filed:
Jan. 23, 2014
International Business Machines Corporation, Armonk, NY (US);
Agency for Science, Technology and Research, Singapore, SG;
Universidad Del Pais Vasco/euskal Herriko Unibertsitatea, Bizkaia, ES;
Julian M. W. Chan, Fremont, CA (US);
Daniel J. Coady, San Jose, CA (US);
Amanda C. Engler, San Jose, CA (US);
Jeannette M. Garcia, San Jose, CA (US);
James L. Hedrick, Pleasanton, CA (US);
Zhan Yuin Ong, Singapore, SG;
Haritz Sardon, San Jose, CA (US);
Yi Yan Yang, Singapore, SG;
International Business Machines Corporation, Armonk, NY (US);
Agency For Science, Technology And Research, Singapore, SG;
Abstract
One catalyst-free method of forming a polyurethane comprises forming a first emulsion comprising a first monomer, a surfactant, a water immiscible organic solvent, and water. The first monomer comprises two or more pentafluorophenyl carbonate groups. The first emulsion is combined with an aqueous mixture containing a second monomer comprising two or more nucleophilic amine groups, thereby forming a second emulsion. The first and second monomers of the second emulsion are allowed to react by interfacial polymerization, thereby forming a polyurethane. The polyurethane can have a number average molecular weight (Mn) of about 30000 to about 80000. The method is compatible with introducing pendant functionality into the polyurethane by way of cyclic carbonate precursors to the first monomer.