3m Innovative Properties Company

Jun Ma

Naiyong Jing

Xue Tian

Gezahegn D Damte

Moses Mekala David

David M Mahli

Richard Yufeng Liu

Victor Ho

Garry W Lachmansingh

Xi Chen

Jordan C Ducharme

Erika Saffer

Erika M Saffer

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.

Hardcoat composition comprising methyl or ethyl trialkoxy silane, articles and methods

Described herein are compositions including a silanol compound that is suitably synthesized, stored, and coated from an aqueous solution. Once coated and cured on a suitable surface, the aqueous silanol compositions result in cleanable and abrasion resistant surfaces, such as dry-erase surfaces that release permanent marker by rubbing with a dry cloth or towel. Also disclosed herein are methods of making the silanol compounds, methods of making cleanable substrates, and cleanable substrates suitably formed using the disclosed methods.

Silanol compositions and methods of use

A film including: an organic polymeric substrate having a first major surface and a second major surface; an optional acrylic hardcoat layer disposed on the first major surface of the substrate; a siliceous primer layer disposed on the organic polymeric substrate or on the optional acrylic hardcoat layer, wherein the siliceous primer layer includes composite particles including an organic polymer portion and a siliceous portion; and a superhydrophilic surface layer disposed on the siliceous primer layer, wherein the superhydrophilic surface layer includes hydrophilic-functional groups.

Films with a primer layer containing composite particles that include an organic polymer portion and a siliceous portion

A film including: an organic polymeric substrate having a first major surface and a second major surface; an optional acrylic hardcoat layer disposed on the first major surface of the substrate; a siliceous primer layer disposed on the organic polymeric substrate or on the optional acrylic hardcoat layer, wherein the siliceous primer layer includes silica nanoparticles modified by an organic silane; and a superhydrophilic surface layer disposed on the siliceous primer layer, wherein the superhydrophilic surface layer includes hydrophilic-functional groups.

Films with a primer layer containing silica nanoparticles modified by an organic silane

Dry erase articles are described comprising a writable surface layer comprising a cured hardcoat composition comprising the reaction product of certain low surface energy compound(s). In one embodiment, the compound(s) comprise a C18-C36 hydrocarbon group and an ethylenically unsaturated group. In another embodiment, a mixture of compounds is utilized, the mixture comprising first compounds comprising a C18-C36 hydrocarbon group and an ethylenically unsaturated group and second compounds comprising a C8-C17 hydrocarbon group and an ethylenically unsaturated group, wherein the first and second compound are present at a weight ratio of 3:2 to 4:1.

Dry erase article

A polyester including at least one crosslinkable moiety is described. Each crosslinkable moiety includes at least one crosslinkable pendent group. A ratio of a total number of the at least one crosslinkable pendent groups to a total number of ester groups in the polyester may be in a range of 0.0001 to 0.5.

Growing community of inventors

Woodbury, MN, United States of America

Jun Ma