# US 2018/0022973 A1 · Acrylic adhesive and protective film including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0022973 A1 - Document ID: US20180022973A1 - Status: Published application - Kind: A1 - Application number: 15/654,943 - Filed: 2017-07-20 - Published: 2018-01-25 - Earliest claimed: 2016-07-22 - Assignees: Samsung Display Co., Ltd.; Dongguan Dyt Electronic Tape Co., Ltd. - Applicants: Samsung Display Co., Ltd.; Dongguan Dyt Electronic Tape Co., Ltd. - Inventors: Sung KIM; Hyun Sook KIM; Jang Hwan JEONG; Sung Chan JO; Kyung Lae RHO; Soo Im JEONG; Oh Jung KWON; Sung Hwan KIM; Oh Nam KWON; Jae Gwan LEE; Jung Hun KIM - Web page: https://patentgrep.com/patent/US20180022973A1 ## CPC - C09J 133/066: {containing -OH groups} - B32B 7/06: permitting easy separation - B32B 7/12: using interposed adhesives or interposed materials with bonding properties - B32B 27/308: {comprising acrylic (co)polymers} - C08F 220/1808: {C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate} - C09J 7/20: characterised by their carriers - C09J 7/30: characterised by the adhesive composition - C09J 11/04: inorganic - C09J 11/08: Macromolecular additives - C08L 2203/206: use in coating or encapsulating of electronic parts - C08L 2312/00: Crosslinking - C09J 2203/318: for the production of liquid crystal displays - C09J 2425/00: Presence of styrenic polymer - C09J 2433/00: Presence of (meth)acrylic polymer - C09J 2481/00: Presence of sulfur containing polymers - 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) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract Disclosed is an acrylic adhesive, including an acrylic polymer obtained by polymerizing a mixture of about 120 parts by weight to about 250 parts by weight of acrylic monomers with about 0.1 parts by weight to about 1 parts by weight of an azo initiator, about 0.5 parts by weight to about 1 parts by weight of a filler, about 1.5 parts by weight to about 2.5 parts by weight of a crosslinking agent, and about 0.5 parts by weight to 1 parts by weight of an anti-static agent. ## Claims ### Claim 1 An acrylic adhesive composition, comprising: an acrylic polymer obtained by polymerizing a mixture of about 120 parts by weight to about 250 parts by weight of acrylic monomers with about 0.1 parts by weight to about 1 parts by weight of an azo initiator, about 0.5 parts by weight to about 1 parts by weight of a filler, about 1.5 parts by weight to about 2.5 parts by weight of a crosslinking agent, and about 0.5 parts by weight to about 1 parts by weight of an anti-static agent. ### Claim 2 (depends on 1) The acrylic adhesive composition as claimed in claim 1, wherein the acrylic monomers include 2-ethylhexylacrylate and 2-(2-ethoxyethoxy)ethyl acrylate. ### Claim 3 (depends on 2) The acrylic adhesive composition as claimed in claim 2, wherein the acrylic monomers include about 100 parts by weight of the 2-ethylhexylacrylate and about 5 parts by weight to about 45 parts by weight of the 2-(2-ethoxyethoxy)ethyl acrylate. ### Claim 4 (depends on 2) The acrylic adhesive composition as claimed in claim 2, wherein the acrylic monomers further include butylacrylate. ### Claim 5 (depends on 4) The acrylic adhesive composition as claimed in claim 4, wherein the acrylic monomers include about 10 parts by weight to about 60 parts by weight of the butylacrylate. ### Claim 6 (depends on 4) The acrylic adhesive composition as claimed in claim 4, wherein the acrylic monomers further include hydroxyethylacrylate. ### Claim 7 (depends on 6) The acrylic adhesive composition as claimed in claim 6, wherein the acrylic monomers include about 4 parts by weight to about 45 parts by weight of the hydroxyethylacrylate. ### Claim 8 (depends on 1) The acrylic adhesive composition as claimed in claim 1, wherein weight average molecular weight of the acrylic polymer is about 450,000 to about 900,000. ### Claim 9 (depends on 1) The acrylic adhesive composition as claimed in claim 1, wherein the azo initiator is 2,2′-azobisisobutyronitrile. ### Claim 10 (depends on 1) The acrylic adhesive composition as claimed in claim 1, wherein the crosslinking agent includes isocyanate. ### Claim 11 (depends on 1) A protective film, comprising: a support film; and an acrylic adhesive layer provided on at least one surface of the support film, the acrylic adhesive layer being formed from the acrylic adhesive composition as claimed in claim 1. ### Claim 12 (depends on 11) The protective film as claimed in claim 11, wherein the acrylic monomers include 2-ethylhexylacrylate, 2-(2-ethoxyethoxy)ethyl acrylate, butylacrylate, and hydroxyethylacrylate. ### Claim 13 (depends on 12) The protective film as claimed in claim 12, wherein the acrylic monomers include about 100 parts by weight of the 2-ethylhexylacrylate, about 5 parts by weight to about 45 parts by weight of the 2-(2-ethoxyethoxy)ethyl acrylate, about 10 parts by weight to about 60 parts by weight of the butylacrylate, and about 4 parts by weight to about 45 parts by weight of the hydroxyethylacrylate. ### Claim 14 (depends on 11) The protective film as claimed in claim 11, wherein weight average molecular weight of the acrylic polymer is about 450,000 to about 800,000. ### Claim 15 (depends on 11) The protective film as claimed in claim 11, further comprising: a release film provided on the acrylic adhesive layer. ### Claim 16 (depends on 15) The protective film as claimed in claim 15, further comprising: an anti-static layer provided between the acrylic adhesive layer and the support film. ### Claim 17 (depends on 11) A display device, comprising: a display panel; and the protective film as claimed in claim 11 provided on the display panel. ### Claim 18 (depends on 17) The display device as claimed in claim 17, wherein the acrylic monomers include 2-ethylhexylacrylate, 2-(2-ethoxyethoxy)ethyl acrylate, butylacrylate, and hydroxyethylacrylate. ### Claim 19 (depends on 18) The display device as claimed in claim 18, wherein the acrylic monomers include about 100 parts by weight of the 2-ethylhexylacrylate, about 5 parts by weight to about 45 parts by weight of the 2-(2-ethoxyethoxy)ethyl acrylate, about 10 parts by weight to about 60 parts by weight of the butylacrylate, and about 4 parts by weight to about 45 parts by weight of the hydroxyethylacrylate. ### Claim 20 (depends on 17) The display device as claimed in claim 17, wherein weight average molecular weight of the acrylic polymer is about 450,000 to about 900,000.