# US 2019/0169433 A1 · High performance polyamide compounds and uses thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0169433 A1 - Document ID: US20190169433A1 - Status: Published application - Kind: A1 - Application number: 16/206,984 - Filed: 2018-11-30 - Published: 2019-06-06 - Earliest claimed: 2017-12-05 - Assignees: A. Schulman, Inc. - Applicants: A. Schulman, Inc. - Inventors: Ying Shi - Web page: https://patentgrep.com/patent/US20190169433A1 ## CPC - C08L 77/06: Polyamides derived from polyamines and polycarboxylic acids (C08L77/10 takes precedence) - C08L 77/10: Polyamides derived from aromatically bound amino and carboxyl groups of amino-carboxylic acids or of polyamines and polycarboxylic acids - H01M 50/193: Organic material - C08L 2201/08: Stabilised against heat, light or radiation or oxydation - C08L 2203/20: use in electrical or conductive gadgets - C08L 2205/24: Crystallisation aids - H01M 50/188: the sealing members being arranged between the lid and terminal - Y02E 60/10: Energy storage using batteries - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract Disclosed herein are high performance semi-aromatic polyamide compounds having improved performance indicators for various applications, including alkaline battery end cap seal assembly applications. In one preferred embodiment, the disclosure relates to compounds comprising a semi-aromatic polyamide component comprising recurring terephthalamide and/or isophthalamide units, an impact modifier component comprising a modified polyolefin elastomer, one or more synergistic blends of sterically hindered phenolic stabilizers and phosphonates and one or more relatively high molecular weight organic phosphite stabilizers, and a fine talc nucleating agent. ## Claims ### Claim 1 A formed article obtained by forming a semi-aromatic polyamide resin composition comprising: 90 to 70 weight percent of at least one semi-aromatic polyamide; 5 to 25 weight percent of at least one modified polyolefin elastomer; 0.2 to 2 weight percent of first and second heat stabilizers; and 0.1 to 2 weight percent of a nucleating agent, wherein the at least one semi-aromatic polyamide has a melt temperature from 305° C. to about 343° C. and a glass transition temperature from 90° C. to 130° C., wherein the first heat stabilizer comprises one or more sterically hindered phenolic stabilizers, alkyl phosphonate stabilizers, or metal salt and halide stabilizers, or combinations thereof, and wherein the second heat stabilizer comprises one or more sterically hindered phenolic stabilizers, organic phosphite stabilizers, or combinations thereof, and wherein the ratio of the first heat stabilizer to the second heat stabilizer is from about 2.5:1 to about 1:1. ### Claim 2 (depends on 1) The formed article of claim 1 wherein the semi-aromatic polyamide resin composition comprises 90 to 77 weight percent of at least one semi-aromatic polyamide, 8 to 20 weight percent of at least one modified polyolefin elastomer, 0.3 to 1.5 weight percent of first and second heat stabilizers, and 0.1 to 1 weight percent nucleating agent, and wherein the ratio of the first heat stabilizer to the second heat stabilizer is from about 2:1 to about 1.25:1. ### Claim 3 (depends on 2) The formed article according to claim 2 wherein the semi-aromatic polyamide resin composition comprises 84 to 83 weight percent of at least one semi-aromatic polyamide, 14.2 to 15.8 weight percent of at least one modified polyolefin elastomer, 0.4 to 1.0 weight percent of first and second heat stabilizers, and 0.1 to 1 weight percent nucleating agent, and wherein the ratio of the first heat stabilizer to the second heat stabilizer is from about 1.67:1 to about 1.5:1. ### Claim 4 (depends on 2) The formed article according to claim 2 wherein the semi-aromatic polyamide comprises repeating units: wherein R comprises an aliphatic radical having 4 to about 14 carbon atoms and the mole ratio of the units 1 and 2 ranges from about 0-100:0-100. ### Claim 5 (depends on 2) The formed article according to claim 2 wherein the modified polyolefin elastomer is a maleic-andydride-modified olefin copolymer. ### Claim 6 (depends on 2) The formed article according to claim 2 wherein the first heat stabilizer comprises one or more synergistic blends of sterically hindered phenolic stabilizers and phosphonates and the second heat stabilizer generally comprises one or more relatively high molecular weight organic phosphite stabilizers, and wherein the nucleating agent is a fine talc having an average particle diameter that does not exceed about 5 μm. ### Claim 7 (depends on 6) The formed article according to claim 6 wherein the first heat stabilizer comprises one or more synergistic blends of sterically hindered phenolic stabilizers and phosphonates, and the second heat stabilizer comprises bis (2,4-dicumylphenyl) pentaerythritol diphosphate, and wherein the nucleating agent is a fine talc having an average particle diameter that does not exceed 1.5 μm. ### Claim 8 A battery end cap seal assembly obtained by forming a semi-aromatic polyamide resin composition comprising: 90 to 70 weight percent of at least one semi-aromatic polyamide; 5 to 25% weight percent of at least one modified polyolefin elastomer; 0.2 to 2 weight percent of first and second heat stabilizers; and 0.1 to 2 weight percent of a nucleating agent, wherein the at least one semi-aromatic polyamide has a melt temperature from 305° C. to about 343° C. and a glass transition temperature from 90° C. to 130° C., wherein the first heat stabilizer comprises one or more sterically hindered phenolic stabilizers, alkyl phosphonate stabilizers, or metal salt and halide stabilizers, or combinations thereof, and wherein the second heat stabilizer comprises one or more sterically hindered phenolic stabilizers, organic phosphite stabilizers, or combinations thereof, and wherein the ratio of the first heat stabilizer to the second heat stabilizer is from about 2.5:1 to about 1:1. ### Claim 9 (depends on 8) The battery end cap seal assembly according to claim 8 wherein the semi-aromatic polyamide resin composition comprises 90 to 77 weight percent of at least one semi-aromatic polyamide, 8 to 20 weight percent of at least one modified polyolefin elastomer, 0.3 to 1.5 weight percent of first and second heat stabilizers, and 0.1 to 1 weight percent nucleating agent, and wherein the ratio of the first heat stabilizer to the second heat stabilizer is from about 2:1 to about 1.25:1. ### Claim 10 (depends on 9) The battery end cap seal assembly according to claim 9 wherein the semi-aromatic polyamide resin composition comprises 84 to 83 weight percent of at least one semi-aromatic polyamide, 14.2 to 15.8 weight percent of at least one modified polyolefin elastomer, 0.4 to 1.0 weight percent of first and second heat stabilizers, and 0.1 to 1 weight percent nucleating agent, and wherein the ratio of the first heat stabilizer to the second heat stabilizer is from about 1.67:1 to about 1.5:1. ### Claim 11 (depends on 9) The battery end cap seal assembly according to claim 9 wherein the semi-aromatic polyamide comprises repeating units: wherein R comprises an aliphatic radical having 4 to about 14 carbon atoms and the mole ratio of the units 1 and 2 ranges from about 0-100:0-100. ### Claim 12 (depends on 9) The battery end cap seal assembly according to claim 9 wherein the modified polyolefin elastomer is a maleic-anhydride-modified olefin copolymer. ### Claim 13 (depends on 9) The battery end cap seal assembly according to claim 9 wherein the first heat stabilizer comprises one or more synergistic blends of sterically hindered phenolic stabilizers and phosphonates and the second heat stabilizer generally comprises one or more relatively high molecular weight organic phosphite stabilizers, and wherein the nucleating agent is a fine talc having an average particle diameter that does not exceed about 5 μm. ### Claim 14 (depends on 13) The battery end cap seal assembly according to claim 13 wherein the first heat stabilizer comprises one or more synergistic blends of sterically hindered phenolic stabilizers and phosphonates, and the second heat stabilizer comprises bis (2,4-dicumylphenyl) pentaerythritol diphosphate, and wherein the nucleating agent is a fine talc having an average particle diameter that does not exceed 1.5 μm. ### Claim 15 A semi-aromatic polyamide resin composition comprising: 90 to 70 weight percent of at least one semi-aromatic polyamide; 5 to 25 weight percent of at least one impact-modified polyolefin elastomer; 0.2 to 2 weight percent of first and second heat stabilizers; and 0.1 to 2 weight percent of a nucleating agent, wherein the at least one semi-aromatic polyamide has a melt temperature from 305° C. to about 343° C. and a glass transition temperature from 90° C. to 130° C., wherein the first heat stabilizer comprises one or more sterically hindered phenolic stabilizers, alkyl phosphonate stabilizers, or metal salt and halide stabilizers, or combinations thereof, and wherein the second heat stabilizer comprises one or more sterically hindered phenolic stabilizers, organic phosphite stabilizers, or combinations thereof, and wherein the ratio of the first heat stabilizer to the second heat stabilizer is from about 2.5:1 to about 1:1. ### Claim 16 (depends on 15) The semi-aromatic polyamide composition of claim 15 comprising 90 to 77 weight percent of at least one semi-aromatic polyamide, 8 to 20 weight percent of at least one modified polyolefin elastomer, 0.3 to 1.5 weight percent of first and second heat stabilizers, and 0.1 to 1 weight percent nucleating agent, and wherein the ratio of the first heat stabilizer to the second heat stabilizer is from about 2:1 to about 1.25:1. ### Claim 17 (depends on 16) The semi-aromatic polyamide composition according to claim 16 comprising 84 to 83 weight percent of at least one semi-aromatic polyamide, 14.2 to 15.8 weight percent of at least one modified polyolefin elastomer, 0.4 to 1.0 weight percent of first and second heat stabilizers, and 0.1 to 1 weight percent nucleating agent, and wherein the ratio of the first heat stabilizer to the second heat stabilizer is from about 1.67:1 to about 1.5:1. ### Claim 18 (depends on 16) The semi-aromatic polyamide composition according to claim 16 wherein the semi-aromatic polyamide comprises repeating units: wherein R comprises an aliphatic radical having 4 to about 14 carbon atoms and the mole ratio of the units 1 and 2 ranges from about 0-100:0-100. ### Claim 19 (depends on 16) The semi-aromatic polyamide composition according to claim 16 wherein the modified polyolefin elastomer is a maleic-anhydride-modified olefin copolymer. ### Claim 20 (depends on 16) The semi-aromatic polyamide composition according to claim 16 wherein the first heat stabilizer comprises one or more synergistic blends of sterically hindered phenolic stabilizers and phosphonates and the second heat stabilizer generally comprises one or more relatively high molecular weight organic phosphite stabilizers, and wherein the nucleating agent is a fine talc having an average particle diameter that does not exceed about 5 μm. ### Claim 21 (depends on 20) The semi-aromatic polyamide composition according to claim 20 wherein the first heat stabilizer comprises one or more synergistic blends of sterically hindered phenolic stabilizers and phosphonates, and the second heat stabilizer comprises bis (2,4-dicumylphenyl) pentaerythritol diphosphate, and wherein the nucleating agent is a fine talc having an average particle diameter that does not exceed 1.5 μm.