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. 02, 2025
Filed:
Sep. 23, 2021
3m Innovative Properties Company, St. Paul, MN (US);
Naiyong Jing, St. Paul, MN (US);
Xue Tian, Woodbury, MN (US);
Jun Ma, Woodbury, MN (US);
Jordan C. Ducharme, Apple Valley, MN (US);
Gezahegn D. Damte, Cottage Grove, MN (US);
Xi Chen, Stillwater, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Articles are described comprising a substrate and a hardcoat layer disposed on the substrate. The hardcoat layer comprises the hydrolyzed and condensed reaction product of a composition comprising: i) first hydrophobic silane monomer(s) having the formula RSi(OR)wherein R and Ris methyl or ethyl; ii) optional second silane monomer(s) having the formula (R)Si(OR)or Si(OR), wherein R, Rand Rare organic groups with the proviso that Ris not methyl or ethyl and m ranges from 1 to 3. The hardcoat layer may further comprises 10 to 30 wt. % silica nanoparticles. A surface layer comprising a hydrophilic silane may be disposed on the hardcoat layer. Also described is a method of using an article having a rewritable surface, hardcoat coating compositions, and methods of making hardcoat compositions and articles.