Adhesive film, optical member comprising the same, and optical display apparatus comprising the same
AssigneeSamsung SDI Co., Ltd.
InventorsJung Hyo Lee, Won Kim, Tae Ji Kim, Oh Hyeon Hwang, Irina Nam, Il Jin Kim
Life of this patent
Estimating the term…
Abstract
An adhesive film, an optical member including the same, and an optical display apparatus including the same are provided. An adhesive film is formed of an adhesive composition including a (meth)acrylic copolymer, a curing agent, a mono- or higher functional monomer, a light-to-heat conversion material, and an initiator, and has a peel strength increase rate of 5.0 or more, as calculated according to Equation 1 herein.
Claims25
An adhesive film formed of an adhesive composition comprising a (meth)acrylic copolymer, a curing agent, a mono- or higher functional monomer, a light-to-heat conversion material to emit heat through absorption of light at a wavelength of about 280 nm to about 430 nm, and an initiator,
- the adhesive film having a peel strength increase rate of 5.0 or more, as calculated by the following Equation 1:
- Peel strength increase rate=P2/P1,
- where P1 is an initial peel strength (unit:
- gf/inch) of the adhesive film with respect to an adherend, as measured on a specimen of the adhesive film and the adherend, and
- P2 is a peel strength of the adhesive film (unit:
- gf/inch) with respect to the adherend, as measured on the specimen of the adhesive film and the adherend after irradiation of the specimen with light,
- wherein the mono- or higher functional monomer comprises a mono- or higher functional(meth)acrylate having a linear or branched C1 to C20 alkyl group or a linear or branched C1 to C20 alkylene group at an ester site;
- or an aromatic group-containing mono functional monomer represented by Formula 1:
- where R1 is hydrogen or a methyl group;
- s is an integer of 0 to 10;
- R2 is a substituted or unsubstituted C6 to C50 aryl group or a substituted or unsubstituted Ce to C50 aryloxy group;
- and T is a substituted or unsubstituted C1 to C6 alkylene group or a substituted or unsubstituted C1 to C6 alkyleneoxy group,
- wherein the light-to-heat conversion material has an average particle diameter of about 10 nm to about 300 nm,
- wherein the light-to-heat conversion material is selected from zinc, platinum, gold, silver, copper, titanium, silicon, chromium, nickel, germanium, aluminum or oxide thereof, and
- wherein the light-to-heat conversion material is present in an amount of about 0.001 parts by weight to about 5 parts by weight, relative to 100 parts by weight of the (meth)acrylic copolymer.
An adhesive film formed of an adhesive composition comprising a (meth)acrylic copolymer, a curing agent, a mono- or higher functional monomer, a light-to-heat conversion material to emit heat through absorption of light at a wavelength of about 280 nm to about 430 nm, and an initiator,
- the adhesive film having an initial peel strength of greater than 0 gf/inch to about 100 gf/inch with respect to an adherend, as measured on a specimen of the adhesive film and the adherend, and a peel strength of 300 gf/inch or more with respect to the adherend, as measured on the specimen of the adhesive film and the adherend after irradiation of the specimen with light,
- wherein the mono- or higher functional monomer comprises a mono- or higher functional(meth)acrylate having a linear or branched C1 to C20 alkyl group or a linear or branched C1 to C20 alkylene group at an ester site;
- or an aromatic group-containing mono-functional monomer represented by Formula 1:
- where R1 is hydrogen or a methyl group;
- s is an integer of 0 to 10;
- R2 is a substituted or unsubstituted C6 to C50 aryl group or a substituted or unsubstituted C6 to C50 aryloxy group;
- and T is a substituted or unsubstituted C1 to C6 alkylene group or a substituted or unsubstituted C1 to C6 alkyleneoxy group,
- wherein the light-to-heat conversion material has an average particle diameter of about 10 nm to about 300 nm,
- wherein the light-to-heat conversion material is selected from zinc, platinum, gold, silver, copper, titanium, silicon, chromium, nickel, germanium, aluminum or oxide thereof, and
- wherein the light-to-heat conversion material is present in an amount of about 0.001 parts by weight to about 5 parts by weight, relative to 100 parts by weight of the (meth)acrylic copolymer.
Dependencies are inferred from the claim text.