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:
Apr. 03, 2007
Filed:
Feb. 14, 2005
Samuel David Arthur, Wilmington, DE (US);
Keith Kunitsky, West Grove, PA (US);
Barry M. Trost, Los Altos Hills, CA (US);
Mark E. Wagman, Wilmington, DE (US);
Samuel David Arthur, Wilmington, DE (US);
Keith Kunitsky, West Grove, PA (US);
Barry M. Trost, Los Altos Hills, CA (US);
Mark E. Wagman, Wilmington, DE (US);
E.I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
A method for preparing p-(2-hydroxyalkyloxy)styrene monomers and oligomers is described. The method comprises a base-catalyzed reaction of a styrene ester, a suitable alcohol and an alkylene oxide in a single vessel reaction. In this method, the reactive p-hydroxystyrene is generated in situ via the base-catalyzed transesterification reaction between the styrene ester and the alcohol in the presence of the base catalyst. The p-hydroxystyrene formed reacts with the alkylene oxide to form the p-(2-hydroxyalkyloxy)styrene monomer or oligomer.