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:
Oct. 11, 2011
Filed:
Jul. 11, 2007
Yoshinari Koyama, Sodegaura, JP;
Motoko Asada, Sodegaura, JP;
Yoshinari Koyama, Sodegaura, JP;
Motoko Asada, Sodegaura, JP;
Nissan Chemical Industries, Ltd., Tokyo, JP;
Abstract
It is intended to provide a stable sol containing zirconium oxide-tin oxide composite colloids to be used for improving the performance such as abrasion resistance, transparency, adhesiveness, water resistance or weather resistance of a dried film obtained by applying a hard coating agent containing colloidal particles to the surface of plastic lens. A production method includes the steps of obtaining a sol containing colloidal particles (A1) in which the surface of particles in a sol containing hydrothermally-processed zirconium oxide-tin oxide composite colloids (A) is coated with amine-containing SbOcolloidal particles; obtaining a sol containing colloids (A2) coated with amine-containing SbOcolloidal particles by performing a hydrothermal treatment at a temperature of from 200 to 350° C.; and mixing the sol containing the colloidal particles (A2) and a sol containing tungsten oxide-tin oxide-silicon dioxide composite colloidal particles (B2) and aging the resulting aqueous medium at 20 to 100° C.