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. 28, 2014
Filed:
Feb. 28, 2011
Christoph Hilgers, Pulheim, DE;
Anantharaman Dhanabalen, Bangalore, IN;
Narayana Padmanabha Iyer, Bangalore, IN;
Shayne Joseph Landon, Ballston Lake, NY (US);
Christoph Hilgers, Pulheim, DE;
Anantharaman Dhanabalen, Bangalore, IN;
Narayana Padmanabha Iyer, Bangalore, IN;
Shayne Joseph Landon, Ballston Lake, NY (US);
Momentive Performance Materials Inc., Albany, NY (US);
Abstract
Disclosed herein are novel copolycarbonates containing repeating units A and B respectively of the formulae: (A) —[ROC(═O)O]—, and (B) —[(RO)n-C(═O)—O]—, wherein the molar ratio of units (A) to units (B) is in the range of from about 9:1 to about 1:9, and wherein Ris a divalent C8 to C12 alicyclic group, and Ris ethylene or propylene, and n is an integer ranging from 4 to 40. Also disclosed are silicone hardcoat compositions containing the copolycarbonates and their derivatives. Upon cure, these silicone hardcoat compositions exhibit improved flexibility as compared to that of the conventional hardcoats while at the same time maintain the abrasion resistance of conventional silicone hardcoats.