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. 30, 2021
Filed:
Dec. 29, 2014
Braskem S.a., Camacari, BR;
Dihogenes Adriano Pozzer, Sao Paulo, BR;
Olavo Martins Junior, Sao Paulo, BR;
Alessandra Coelho Silva Lucas, Sao Paulo, BR;
Fernando Silveira, Sao Paulo, BR;
Braskem S.A., Camaçari—BA, BR;
Abstract
A process for treatment of nanoparticles of mineral filler for obtaining processed nanoparticles for use in polymerization in the presence of nanoparticles which includes the steps of (a) drying a mineral filler with an inert gas to remove catalyst poisons; (b) mixing the mineral filler dried obtained in step (a) with a swelling agent in a liquid state or near a critical state or in the supercritical state; (c) subjecting the swelling agent of the mixture obtained in step (b) to an endoenthalpic or isoentalphic phase change by altering the conditions of the temperature and/or pressure; (d) subjecting the nanoparticles of the mixture obtained in step (c) to contact of scavenging agent to react with catalyst poisons; then the mixture obtained in step (d) can be dried in a step (e) with an inert gas to remove sub-products from scavenging agent and catalyst poisons to obtain the treated nanoparticles.