Rohm & Haas Electronic Materials LLC

Michael Mulzer

Jieqian Zhang

Joseph Kao

Yusuke Matsuda

Display substrates having a hard coat layer on a colorless polyimide substrate are formed from hard coat compositions having certain organic solvents that do not substantially impact the optical and mechanical properties of the colorless polyimide substrate.

Hardcoat

A curable composition comprising an epoxy-siloxane oligomer comprising as polymerized units one or more difunctional silane monomers of formula (1) and one or more trifunctional silane monomers of formula (2) in a mole ratio of 95:5 to 10:30Si(R)(R)(Y)&#x2003;&#x2003;(1)SiR(Y)&#x2003;&#x2003;(2)wherein R, R, and Rare independently chosen from a C-aliphatic group comprising an oxirane ring fused to an alicyclic ring, C-alkyl, C-aryl group, and a C-aliphatic group having one or more heteroatoms; each Yand Yis independently chosen from halogen, C-alkoxy, and &#x2014;O&#x2014;C-acyl group; wherein at least one of R, R, and Ris a C-aliphatic group comprising an oxirane ring fused to an alicyclic ring; (b) organic particles having an average diameter of 50 to 250 nm; (c) a reactive carrier having one or more epoxy moieties or oxetane moieties; (d) a curing agent; and (e) one or more organic solvents, and methods of forming cured coatings using such compositions are described.

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Marlborough, MA, United States of America

Michael Mulzer