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. 15, 2015
Filed:
Jun. 30, 2011
Applicants:
Paul Gregory Bekiarian, Wilmington, DE (US);
Gordon Mark Cohen, Wynnewood, PA (US);
Paul Douglas Stull, Wilmington, DE (US);
Inventors:
Paul Gregory Bekiarian, Wilmington, DE (US);
Gordon Mark Cohen, Wynnewood, PA (US);
Paul Douglas Stull, Wilmington, DE (US);
Assignee:
E I DU PONT DE NEMOURS AND COMPANY, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G07F 7/04 (2006.01); C07F 7/18 (2006.01); B82Y 30/00 (2011.01); C09C 1/30 (2006.01);
U.S. Cl.
CPC ...
C07F 7/1836 (2013.01); B82Y 30/00 (2013.01); C09C 1/3081 (2013.01); C01P 2004/64 (2013.01);
Abstract
This invention relates to the use of certain amine promoters in processes for surface-treating colloidal silica nanoparticles with selected aromatic aminosilanes, aromatic aminoalkylsilanes, and secondary and tertiary aliphatic aminosilanes. This process provides surface-modified nanoparticle colloidal silica without causing the silica nanoparticles to gel, agglomerate, or aggregate.