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:
Dec. 23, 2014
Filed:
Apr. 15, 2010
Mary Mckiernan, Cottenham, GB;
Thomas Pounds, Cambridge, GB;
Mary McKiernan, Cottenham, GB;
Thomas Pounds, Cambridge, GB;
Cambridge Display Technology Limited, Cambridgeshire, GB;
Sumitomo Chemical Company Limited, Tokyo, JP;
Abstract
A method for forming a polymer comprising the polymerization of a plurality of monomers, wherein at least one of the plurality of monomers is one or both of: a charge transporting unit and a hydrocarbon monomer in which at least one carbon atom has been substituted by an atom or group with a greater quantity of unshared valence electrons than the carbon atom it has been substituted for, and wherein at least one of the plurality of monomers comprises an end-capping compound at one end of said monomer, the end-capping compound preventing polymerization at the end, wherein the end-capping compound is not charge transporting and comprises at least two rings. The end capping compound preferably consists of or includes a structural unit having the formula: (Ar)—X, wherein Ar in each occurrence independently represents an aryl or heteroaryl group; X represents a leaving group comprising a boron derivative group or halogen; and n is 2 or more.