# US 2017/0285233 A1 · Polarizing plate and display apparatus comprising same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0285233 A1 - Document ID: US20170285233A1 - Status: Published application - Kind: A1 - Application number: 15/507,593 - Filed: 2015-09-25 - Published: 2017-10-05 - Earliest claimed: 2014-09-30 - Assignees: LG Chem, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Mi Rin LEE; Kwang Seung PARK; Eunsoo HUH; Jun Wuk PARK; Sung Hyun JEON - Web page: https://patentgrep.com/patent/US20170285233A1 ## CPC - G02B 5/30: Polarising elements (light-modulating devices with active elements G02F1/00) - C09J 4/00: Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16} - G02B 5/3033: {in the form of a thin sheet or foil, e.g. Polaroid} - G02F 1/1335: Structural association of cells with optical devices, e.g. polarisers or reflectors - G02F 1/133528: {Polarisers} - G02F 2202/28: Adhesive materials or arrangements - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H) - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract The present specification relates to a polarizing plate and a display device comprising the same. ## Claims ### Claim 1 A polarizing plate comprising: a polarizer; an adhesive layer formed on at least one surface of the polarizer; and a protective film formed on the adhesive layer, wherein the adhesive layer is a cured product of a radical curable adhesive composition comprising: (A) a first compound represented by the following Formula 1; (B) a second compound represented by the following Formula B; and (C) a radical initiator: in Formula 1, R101 is an ester group; or an ether group, R102 is a C1 to C10 alkyl group having at least one hydroxy group (—OH); or a C4 to C10 cycloalkyl group having at least one hydroxy group (—OH), R103 is hydrogen; or a C1 to C10 alkyl group, in Formula B, at least one of R1 and R2 is hydrogen, and the other is a C1 to C10 alkyl group, L1 is —N(H)C(═O)N(H)—; or —N(H)C(═O)-L4-C(═O)N(H)—, L2 to L4 are the same as or different from each other, and are each independently a C1 to C10 alkylene group, which is unsubstituted or substituted with an alkyl group, when L2 and L3 are the same as or different from each other, and are each independently an unsubstituted C1 to C10 alkylene group, one of R1 and R2 is a C1 to C10 alkyl group, m and n are each 1 or 2, and when m and n are each 2, two structures in the parenthesis are the same as or different from each other. ### Claim 2 (depends on 1) The polarizing plate of claim 1, wherein the first compound is represented by any one of the following Formula 2 to Formula 9: ### Claim 3 (depends on 1) The polarizing plate of claim 1, wherein the second compound is obtained by reacting an aziridine compound; and (meth)acrylic acid or a (meth)acrylate including a hydroxy group (—OH) as a substituent. ### Claim 4 (depends on 3) The polarizing plate of claim 3, wherein the aziridine compound is represented by the following Formula 10 or 11: in Formulae 10 and 11, R3 to R11 are the same as or different from each other, and are each independently hydrogen; or a C1 to C10 alkyl group, L12 and L14 are the same as or different from each other, and are each independently a C1 to C10 alkylene group, which is unsubstituted or substituted with an alkyl group, m1 is 1 or 2, and when m1 is 2, two L12s are the same as or different from each other. ### Claim 5 (depends on 3) The polarizing plate of claim 3, wherein the (meth)acrylate comprising a hydroxy group as a substituent is represented by the following Formula 12: in Formula 12, R12 is hydrogen; or a C1 to C10 alkyl group, and R13 is a C1 to C10 alkyl group, which is substituted with at least one hydroxy group (—OH); or a C3 to 10 cycloalkyl group, which is substituted with at least one hydroxy group (—OH). ### Claim 6 (depends on 1) The polarizing plate of claim 1, wherein the second compound is represented by the following Formula B-1 or B-2: in Formulae B-1 and B-2, the definitions of R1, R2, L2 to L4, m, and n are the same as those of Formula 1. ### Claim 7 (depends on 1) The polarizing plate of claim 1, wherein the second compound is represented by any one of the following Formulae B-3 to B-5: ### Claim 8 (depends on 1) The polarizing plate of claim 1, wherein the radical curable adhesive composition includes 40 to 85 parts by weight of the first compound, 5 to 50 parts by weight of the second compound, and 0.1 to 10 parts by weight of the radical initiator, based on 100 parts by weight of the radical curable adhesive composition. ### Claim 9 (depends on 3) The polarizing plate of claim 3, wherein when the number of aziridine groups of the aziridine compound is defined as n, a molar ratio of the aziridine compound:(meth)acrylic acid or the (meth)acrylate comprising a hydroxy group as a substituent is 1:n, and n is an integer. ### Claim 10 (depends on 1) The polarizing plate of claim 1, wherein the radical curable adhesive composition further comprises an acrylic monomer comprising an amine group as a third compound. ### Claim 11 (depends on 10) The polarizing plate of claim 10, wherein the third compound is one or more selected from the group consisting of N,N-dimethyl acrylamide, acryloyl morpholine, N-isopropyl acrylamide, N,N-diethyl acrylamide, N,N-dimethylamino propylacrylamide, and 1,2,2,6,6-pentamethyl-4-piperidiyl methacrylate. ### Claim 12 (depends on 10) The polarizing plate of claim 10, wherein a content of the third compound is 5 to 20 parts by weight based on 100 parts by weight of the radical curable adhesive composition. ### Claim 13 (depends on 1) The polarizing plate of claim 1, wherein the radical curable adhesive composition has a glass transition temperature of 60° C. or more after UV curing. ### Claim 14 (depends on 1) The polarizing plate of claim 1, wherein the radical curable adhesive composition has a storage modulus of 1,000 MPa to 5,000 MPa, which is measured by a dynamic mechanical analysis (DMA) method at 25° C. after curing. ### Claim 15 (depends on 1) A display device comprising: a display panel; and the polarizing plate of claim 1, which is provided on one surface or both surfaces of the display panel.