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:
Jan. 11, 2005
Filed:
Jun. 04, 2003
Jeng-cheng Yang, Tao-Yuan, TW;
Chen-chi Martin MA, Hsinchu, TW;
Hon-bin Chen, Tao-Yuan, TW;
Chin-yih Chen, Tao-Yuan, TW;
Jeng-Cheng Yang, Tao-Yuan, TW;
Chen-Chi Martin Ma, Hsinchu, TW;
Hon-Bin Chen, Tao-Yuan, TW;
Chin-Yih Chen, Tao-Yuan, TW;
Chung-Shan Institute of Science & Technology, Tao-Yuan, TW;
Abstract
A poly(urea-ureathane) based on polydimethyl siloxane is prepared by reacting an amino-terminated polydimethyl siloxane with polyisocyanate to form a prepolymer of poly(urea-urethane), and reacting the prepolymer and a chain extender in the presence of a catalyst. The resulting poly(urea-urethane) contains about 5-65 wt % of hard segments, and has a surface resistance of about 10-150 MΩ at high relative humidity, so that it can be used in anti-static electricity and electrostatic discharge shielding.