# US 2022/0033693 A1 · Adhesive agent and adhesive sheet > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0033693 A1 - Document ID: US20220033693A1 - Status: Published application - Kind: A1 - Application number: 17/500,324 - Filed: 2021-10-13 - Published: 2022-02-03 - Earliest claimed: 2019-04-23 - Assignees: Mitsubishi Chemical Corporation - Applicants: Mitsubishi Chemical Corporation - Inventors: Hideaki SUZUKI - Web page: https://patentgrep.com/patent/US20220033693A1 ## CPC - C09J 167/00: Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain (based on polyester-amides C09J177/12; based on polyester-imides C09J179/08); Adhesives based on derivatives of such polymers - C08G 18/222: {metal compounds not provided for in groups C08G18/225 - C08G18/26} - C08G 18/4233: {derived from polymerised higher fatty acids or alcohols} - C08G 18/792: {formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates} - C08G 18/797: {containing carbodiimide and/or uretone-imine groups} - C08G 18/8006: {with compounds of C08G18/32} - C08G 18/8067: {phenolic compounds} - C08G 18/8074: {Lactams} - C08G 63/12: derived from polycarboxylic acids and polyhydroxy compounds - C08G 63/16: Dicarboxylic acids and dihydroxy compounds - C08G 63/199: Acids or hydroxy compounds containing cycloaliphatic rings - C08G 63/20: Polyesters having been prepared in the presence of compounds having one reactive group or more than two reactive groups - C09J 7/30: characterised by the adhesive composition - C09J 7/38: Pressure-sensitive adhesives [PSA] - C09J 11/06: organic - C09J 11/08: Macromolecular additives - C09J 167/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C09J167/06 takes precedence) - C09J 175/06: from polyesters - C09J 2203/318: for the production of liquid crystal displays - C09J 2301/312: parameters being the characterizing feature - C09J 2467/00: Presence of polyester - 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) - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS ## Abstract An adhesive agent produced by crosslinking an adhesive agent composition containing a polyester resin (i) having a structural portion derived from a polycarboxylic acid compound (a) and a structural portion derived from a polyol component (b), wherein the polyester resin (i) contains a structural portion derived from at least one selected from the group consisting of a dimer acid compound, a sebacic acid compound, and a dimer diol in a proportion of not less than 60 wt. % based on the weight of the polyester resin (i), wherein the polyol component (b) includes a glycol (b1) having an even carbon number (excluding the dimer diol), wherein the polyester resin (i) has an ester group concentration of not less than 2 mmol/g. The adhesive agent has an adhesive force (α) of not less than 1 N/25 mm as measured under predetermined conditions. ## Claims ### Claim 1 An adhesive agent comprising a crosslinked adhesive agent composition which comprises a polyester resin (i) having a structural portion derived from a polycarboxylic acid compound (a) and a structural portion derived from a polyol component (b), wherein not less than 60 wt. % of a total weight of the polyester resin (i) comprises a structural portion derived from at least one selected from the group consisting of a dimer acid compound, a sebacic acid compound, and a dimer diol, wherein the polyol component (b) comprises a glycol (b1) having an even carbon number, excluding the dimer diol, and wherein the polyester resin (i) has an ester group concentration of not less than 2 mmol/g, the adhesive agent having an adhesive force (α) of not less than 1 N/25 mm as measured as a 180-degree peel strength (N/25 mm) by forming an adhesive agent layer of the adhesive agent on a substrate to provide an adhesive sheet, bonding the adhesive sheet to an adherend of a bright annealed stainless steel plate, allowing the resulting structure to stand still at 23° C. at 50% RH for 30 minutes, and peeling the adhesive sheet from the adherend at a peel rate of 300 mm/minute. ### Claim 2 (depends on 1) The adhesive agent according to claim 1, wherein the even carbon number glycol (b1) is an aliphatic glycol having a straight chain structure. ### Claim 3 (depends on 1) The adhesive agent according to claim 1, wherein the polycarboxylic acid compound (a) comprises a straight chain carboxylic acid compound (a1) in a proportion of not greater than 70 mol %. ### Claim 4 (depends on 1) The adhesive agent according to claim 1, wherein the even carbon number glycol (b1) is present in a proportion of 10 to 100 mol % in the polyol component (b). ### Claim 5 (depends on 1) The adhesive agent according to claim 1, wherein the even carbon number glycol (b1) is a polyol having a carbon number of not greater than 4. ### Claim 6 (depends on 1) The adhesive agent according to claim 1, wherein the polyester resin (i) has an acid value of not greater than 10 mg KOH/g. ### Claim 7 (depends on 1) The adhesive agent according to claim 1, wherein the polyester resin (i) has a bioplastic degree of not less than 60%. ### Claim 8 (depends on 1) The adhesive agent according to claim 1, wherein the adhesive agent composition further comprises a hydrolysis inhibitor (iii). ### Claim 9 (depends on 1) The adhesive agent according to claim 1, wherein the adhesive agent composition further comprises a crosslinking agent (iv). ### Claim 10 (depends on 1) The adhesive agent according to claim 1, wherein the adhesive agent composition further comprises a tackifier resin (vii). ### Claim 11 (depends on 1) The adhesive agent according to claim 1, which has a bioplastic degree of not less than 60%. ### Claim 12 (depends on 1) The adhesive agent according to claim 1, which is used for bonding a component. ### Claim 13 (depends on 1) An adhesive sheet comprising an adhesive agent layer comprising the adhesive agent according to claim 1. ### Claim 14 An adhesive agent comprising a crosslinked adhesive agent composition which comprises a polyester resin (ii) having a bioplastic degree of not less than 60%, wherein the polyester resin (ii) has a structural portion derived from a polycarboxylic acid compound (a) and a structural portion derived from a polyol component (b), and the polyol component (b) comprises a glycol (b1) having an even carbon number, excluding a dimer diol, and wherein the polyester resin (ii) has an ester group concentration of not less than 2 mmol/g, the adhesive agent having an adhesive force (α) of not less than 1 N/25 mm as measured as a 180-degree peel strength (N/25 mm) by forming an adhesive agent layer of the adhesive agent on a substrate to provide an adhesive sheet, bonding the adhesive sheet to an adherend of a bright annealed stainless steel plate, allowing the resulting structure to stand still at 23° C. at 50% RH for 30 minutes, and then peeling the adhesive sheet from the adherend at a peel rate of 300 mm/minute. ### Claim 15 (depends on 14) The adhesive agent according to claim 14, wherein the adhesive agent composition further comprises a hydrolysis inhibitor (iii). ### Claim 16 (depends on 14) The adhesive agent according to claim 14, wherein the adhesive agent composition further comprises a crosslinking agent (iv). ### Claim 17 (depends on 14) The adhesive agent according to claim 14, wherein the adhesive agent composition further comprises a tackifier resin (vii). ### Claim 18 (depends on 14) The adhesive agent according to claim 14, which has a bioplastic degree of not less than 60%. ### Claim 19 (depends on 14) The adhesive agent according to claim 14, which is used for bonding a component. ### Claim 20 (depends on 14) An adhesive sheet comprising an adhesive agent layer comprising the adhesive agent according to claim 14.