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:
Nov. 01, 2005
Filed:
Dec. 22, 2003
Gregory Allen O'neil, Clifton Park, NY (US);
James Day, Scotia, NY (US);
Daniel Joseph Brunelle, Burnt Hills, NY (US);
Joseph Anthony Suriano, Clifton Park, NY (US);
Patrick Joseph Mccloskey, Watervliet, NY (US);
Paul Michael Smigelski, Jr., Schenectady, NY (US);
Gregory Allen O'Neil, Clifton Park, NY (US);
James Day, Scotia, NY (US);
Daniel Joseph Brunelle, Burnt Hills, NY (US);
Joseph Anthony Suriano, Clifton Park, NY (US);
Patrick Joseph McCloskey, Watervliet, NY (US);
Paul Michael Smigelski, Jr., Schenectady, NY (US);
General Electric Company, Nishayuna, NY (US);
Abstract
A method of preparing block copolymers by solid state polymerization is described. A mixture of a partially crystalline polycarbonate having activated terminal aryloxy groups, for example terminal methyl salicyl groups, when heated together with an oligomeric polyester having reactive terminal hydroxy groups under solid state polymerization conditions affords block copolymers. The activated terminal aryloxy groups play a key role in preserving the block lengths of the starting materials. A control sample in which the partially crystalline polycarbonate lacks activated terminal aryloxy groups, for example polycarbonates substituted by phenol, affords a much lower molecular weight, more highly randomized copolymer product. The product block copolymers are useful as 'weatherable' plastic materials.