公开(公告)号：US20230357520A1

公开(公告)日：2023-11-09

申请号：US18026268

申请日：2021-09-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Naiyong Jing ,  Xue Tian ,  Jun Ma ,  Jordan C. DuCharme ,  Gezahegn D. Damte ,  Xi Chen

IPC: C08J7/06 ,  C08J7/056 ,  C08K5/541 ,  C08G77/18 ,  C08K3/36 ,  C09D183/06 ,  C09D7/61

CPC classification number: C08J7/06 ,  C08J7/056 ,  C08K5/541 ,  C08G77/18 ,  C08K3/36 ,  C09D183/06 ,  C09D7/61 ,  C08J2367/02

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 R1Si(OR)3 wherein R and R1 is methyl or ethyl; ii) optional second silane monomer(s) having the formula (R2)4-mSi(OR)m or Si(OR)4, wherein R, R1 and R2 are organic groups with the proviso that R1 is not methyl or ethyl and m ranges from 1 to 3. The hardcoat layer N 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.