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:
Oct. 13, 2009
Filed:
Sep. 28, 2007
Hans-peter Brack, Herrliberg, CH;
Maarten Antoon Jan Campman, Churra-Murcia, ES;
Yohana Perez DE Diego, Murcia, ES;
Martin Herke Oyevaar, Goes, NL;
Laurus Van Der Wekke, Rucphen, NL;
Dennis Willemse, Standdaarbuiten, NL;
Hans-Peter Brack, Herrliberg, CH;
Maarten Antoon Jan Campman, Churra-Murcia, ES;
Yohana Perez de Diego, Murcia, ES;
Martin Herke Oyevaar, Goes, NL;
Laurus van der Wekke, Rucphen, NL;
Dennis Willemse, Standdaarbuiten, NL;
Sabic Innovative Plastics IP B.V., Bergen op Zoom, NL;
Abstract
A non-reactive monomer mixture is formed from a dihydroxy component having one or more dihydroxy compounds dissolved in a melted diaryl carbonate. The dihydroxy component has less than 600 ppb alkali metal, an acid stabilizer, or both less than 600 ppb alkali metal and an acid stabilizer. The dihydroxy compounds of the dihydroxy component and the diaryl carbonate are present in a mole ratio of from 0.9 to 1.1. The monomer mixture is at a temperature between the saturation point of the monomer mixture and the highest melting temperature of the individual dihydroxy compounds. The non-reactive monomer mixture can be stored and transported and then polymerized to form polycarbonate upon addition of a catalyst.