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:
Jul. 09, 2019
Filed:
Oct. 01, 2015
Rhodia Poliamida E Especialidades S.a., San Paulo, BR;
Renata Redondo Bonaldi, São Paulo, BR;
Gabriel Gorescu, São Paulo, BR;
Thomas Gonzaga Canova, São Paulo, BR;
Everton Ferreira Dos Santos, São Paulo, BR;
RHODIA POLIAMIDA E ESPECIALIDADES S.A., Sao Paulo, BR;
Abstract
The present invention relates to a method for providing resistance to phenolic yellowing, during storage, transportation and processing of polyamide articles, caused by the presence of phenolic compounds in plastic package materials. The phenolic yellowing resistance is obtained by adding a sulfonated reagent during polymerization of the polyamide and/or during the formation of the polyamide article, like melt-spinning extrusion, and/or during the conversion of the polyamide article by texturizing.