A curable sheet composition able to follow up a mold shape under the application of heat and pressure, able to polymerize and cure upon being irradiated with light, permitting an optical element molding pattern to be fixed, and comprising 50% to 94% of a polycarbonate diol-modified urethane acrylate oligomer, 5% to 40% of a (meth)acrylate containing at least one carboxyl group in each molecule thereof, and 0.5% to 5% of a photopolymerization initiator.
A liquid thermally expandable curable resin composition for use such as bonding by filling a clearance has difficulty in achieving both drying property and film forming property and also has a problem with storage stability. The problems were solved with a curable resin composition having the following composition. A curable resin composition comprises: (A) a film forming resin, (B) an epoxy resin, (C) an organic solvent, (D) thermally expandable particles, and (E) a curing agent ingredient for the (B). The (C) is selected from organic solvents having a boiling point of 100°C or less and being liquid at normal temperature and contains a combination of (C-1) an ester-based solvent and (C-2) one or more solvents selected from ketone-based solvents, ether-based solvents, and glycol-based solvents, and a content ratio between the (C-1) and the (C-2) in a mass ratio is in a range of (C-l)/(C-2) = 0.12 to 0.23.
OPTICAL ARTICLE WITH A DURABILITY IMPROVED HARD COATING
申请人:ESSILOR INTERNATIONAL
公开号:EP3923038A1
公开(公告)日:2021-12-15
The present invention relates to an optical article comprising a substrate having at least one main surface coated with a coating comprising at least one layer of an abrasion and/or scratch-resistant coating, wherein the abrasion and/or scratch-resistant coating is formed from a composition comprising at least one epoxy compound bearing at least one silicon atom having at least one hydrolysable group directly linked to the silicon atom and at least one group comprising an epoxy function linked to the silicon atom through a carbon atom, and/or a hydrolysate thereof, at least one plasticizer, a silane hydrolysate and colloidal silica, wherein the total amount of plasticizer in the composition is lower than 10wt% of the dry extract of the total composition, and wherein the weight ratio of silane of formula (I) to plasticizer is higher than 0.4 in the dry exact of the composition. The invention further relates to a process for the manufacture of such an abrasion and/or scratch-resistant coating on a substrate.
A liquid thermally expandable curable resin composition for use such as bonding by filling a clearance has difficulty in achieving both drying property and film forming property and also has a problem with storage stability. The problems were solved with a curable resin composition having the following composition. A curable resin composition comprises: (A) a film forming resin, (B) an epoxy resin, (C) an organic solvent, (D) thermally expandable particles, and (E) a curing agent ingredient for the (B). The (C) is selected from organic solvents having a boiling point of 100° C. or less and being liquid at normal temperature and contains a combination of (C-1) an ester-based solvent and (C-2) one or more solvents selected from ketone-based solvents, ether-based solvents, and glycol-based solvents, and a content ratio between the (C-1) and the (C-2) in a mass ratio is in a range of (C-1)/(C-2)=0.12 to 0.23.