# US 12,180,340 B2 · Polyamide resin, preparation method therefof, and polyamide film and resin laminate comprising the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,180,340 B2 - Document ID: US12180340B2 - Status: Granted - Kind: B2 - Application number: 17/059,975 - Filed: 2019-11-01 - Published: 2021-07-15 - Granted: 2024-12-31 - Earliest claimed: 2018-11-05 - Assignees: LG Chem, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Il Hwan Choi; Young Ji Tae; Soonyong Park; Youngseok Park - Web page: https://patentgrep.com/patent/US12180340B2 ## CPC - C08G 69/32: from aromatic diamines and aromatic dicarboxylic acids with both amino and carboxylic groups aromatically bound - C08G 69/265: {from at least two different diamines or at least two different dicarboxylic acids} - C08G 69/28: Preparatory processes - C08G 69/42: Polyamides containing atoms other than carbon, hydrogen, oxygen, and nitrogen (C08G69/12, C08G69/32 take precedence) - C08G 81/00: Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers (involving only carbon-to-carbon unsaturated bond reactions C08F299/00 {; polyester-amides C08G69/44; polyester-imides C08G73/16; polyamides-imides C08G73/14; block- or graft polymers containing polysiloxane sequences C08G77/42}) - C08J 5/18: Manufacture of films or sheets - C08J 7/046: Forming abrasion-resistant coatings; Forming surface-hardening coatings - C08L 77/10: Polyamides derived from aromatically bound amino and carboxyl groups of amino-carboxylic acids or of polyamines and polycarboxylic acids - C08J 2377/10: Polyamides derived from aromatically bound amino and carboxyl groups of amino carboxylic acids or of polyamines and polycarboxylic acids - C08L 2201/08: Stabilised against heat, light or radiation or oxydation - C08L 2201/10: Transparent films; Clear coatings; Transparent materials - C08L 2203/16: used for films - C08L 2203/20: use in electrical or conductive gadgets - C08L 2203/30: used for thermoforming - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract The present invention relates to a polyamide resin having a main chain having a structure in which two polyamide segments are linked in an alternating way, a preparation method thereof, and a polyamide film and resin laminate including the same. ## Claims ### Claim 1 A polyamide resin which comprises: a first polyamide segment including a repeating unit represented by the following Chemical Formula 1 or a block composed thereof; and a second polyamide segment including a repeating unit represented by the following Chemical Formula 2, or a block composed thereof, wherein the first polyamide segment and the second polyamide segment form a main chain including an alternating repeating unit represented by the following Chemical Formula 3: in the Chemical Formulae 1 and 2, Ar1 and Ar2 are each independently a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 20 carbon atoms, and in the Chemical Formula 3, A is the first polyamide segment, and B is the second polyamide segment, wherein the polyamide resin has a weight average molecular weight of at least 330000 g/mol, wherein a content of the repeating units represented by Chemical Formula 1 is in an amount of 80 mol % to 90 mol %, and a content of the repeating units represented by Chemical Formula 2 is in an amount of 10 mol % to 20 mol %, based on the total repeating units contained in the polyamide resin, and wherein the polyamide resin has a haze measured according to ASTM D1003 of 3.0% or less. ### Claim 2 (depends on 1) The polyamide resin according to claim 1, wherein the polyamide resin has a relative viscosity of at least 45000 cps. ### Claim 3 (depends on 1) The polyamide resin according to claim 1, wherein the first polyamide segment has a number average molecular weight of 100 g/mol or more and 5000 g/mol or less. ### Claim 4 (depends on 1) The polyamide resin according to claim 1, wherein the repeating unit represented by Chemical Formula 2 comprises a repeating unit represented by the following Chemical Formula 2-1; or a repeating unit represented by Chemical Formula 2-2: in the Chemical Formulae 2-1 to 2-2, Ar2 is a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 20 carbon atoms. ### Claim 5 (depends on 1) The polyamide resin according to claim 1, wherein the alternating repeating unit represented by Chemical Formula 3 is a repeating unit represented by the following Chemical Formula 4: in the Chemical Formula 4, Ar1 and Ar2 are each independently a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 20 carbon atoms, a1 and a2 are each independently an integer of 1 to 10, and b1 and b2 are each independently an integer of 1 to 5. ### Claim 6 (depends on 1) The polyamide resin according to claim 1, wherein the repeating unit represented by Chemical Formula 1 is an amide repeating unit derived from a combination of a 1,4-aromatic diacyl compound and an aromatic diamine compound. ### Claim 7 (depends on 6) The polyamide resin according to claim 6, wherein the 1,4-aromatic diacyl compound comprises terephthaloyl chloride, or terephthalic acid, and the aromatic diamine compound comprises 2,2′-bis(trifluoromethyl)-4,4′-biphenyldiamine. ### Claim 8 (depends on 1) The polyamide resin according to claim 1, wherein the repeating unit represented by Chemical Formula 2 comprises an amide repeating unit derived from a combination of a 1,2-aromatic diacyl compound and an aromatic diamine compound; or an amide repeating unit derived from a combination of a 1,3-aromatic diacyl compound and the aromatic diamine compound. ### Claim 9 (depends on 8) The polyamide resin according to claim 8, wherein the 1,2-aromatic diacyl compound comprises phthaloyl chloride, or phthalic acid, the 1,3-aromatic diacyl compound comprises isophthaloyl chloride or isophthalic acid, and the aromatic diamine compound includes 2,2′-bis(trifluoromethyl)-4,4′-biphenyldiamine. ### Claim 10 (depends on 1) A resin laminate comprising: a substrate including the first polyamide resin of claim 1; and a hard coating layer formed on at least one side of the substrate.