{"organism":"Page","children":[{"organism":"Container.Raw","children":[{"organism":"Metadata","color":"brand1-solid","model":{"title":"Elastomer compatibility in turbine engine oils","text":"Oil manufacturers face the challenge of developing high thermal stability oils that do not damage elastomer materials in turbine engines, which can lead to leaks and high oil consumption. How can we assess the elastomer compatibility of high thermal stability oils?","links":[{"name":"Read more","value":"https://www.shell.com/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility.html"}],"tags":[{"name":"Sectoral Decabonisation","value":"downstream-and-renewables:sectoral-decabonisation"},{"name":"Aviation","value":"downstream-and-renewables:sectoral-decabonisation/aviation"},{"name":"Downstream & Renewables","value":"line-of-business:downstream-and-renewables"}]},"id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/metadata"},{"organism":"ContentOwner","color":"brand1-solid","model":{},"id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/contentowner"},{"organism":"Container.Header","children":[{"organism":"Container.Raw","ref":"https://www.shell.com/_jcr_content/root/header/inherited.model.json","id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/header/inherited","model":{}},{"organism":"Breadcrumb","model":{"links":[{"name":"Home","value":"https://www.shell.com/"},{"name":"Business customers","value":"https://www.shell.com/business-customers.html"},{"name":"Shell Aviation","value":"https://www.shell.com/business-customers/aviation.html"},{"name":"Lubricants for Aviation","value":"https://www.shell.com/business-customers/aviation/aeroshell.html"},{"name":"Knowledge Centre","value":"https://www.shell.com/business-customers/aviation/aeroshell/knowledge-centre.html"},{"name":"Technical Talk","value":"https://www.shell.com/business-customers/aviation/aeroshell/knowledge-centre/technical-talk.html"},{"name":"Elastomer compatibility in turbine engine oils","value":"https://www.shell.com/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility.html"}]},"id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/header/breadcrumb"}],"id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/header","model":{}},{"organism":"Container.Main","children":[{"organism":"Container.Section","children":[{"organism":"PageHeader.Date","color":"brand2","model":{"title":"Elastomer compatibility in turbine engine oils"},"id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/main/section/item"},{"organism":"PromoSimple.Text","color":"inherited","colspan":8,"id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/main/section/text_1709824285","model":{"text":"\u003Cp\u003EOil manufacturers face the challenge of developing high thermal stability oils that do not damage elastomer materials in turbine engines, which can lead to leaks and high oil consumption. How can we assess the elastomer compatibility of high thermal stability oils?\u003C/p\u003E\r\n"}},{"organism":"Container","colspan":4,"children":[{"organism":"Container.List","children":[{"organism":"ListItem","color":"inherited","id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/main/section/simple_copy_copy_cop/list/list_item","model":{"title":"Enquiries","text":"\u003Cp\u003E\u003Ca href=\"https://www.shell.com/business-customers/aviation/aeroshell/contact-us.html\"\u003E\u003Cb\u003EAsk an AeroShell Expert\u003C/b\u003E\u003C/a\u003E\u003C/p\u003E\r\n","links":[{"value":"https://www.shell.com/business-customers/aviation/aeroshell/contact-us.html","icon":"/content/dam/shell/icons/global/operations/letter-open.svg"}]}}],"id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/main/section/simple_copy_copy_cop/list","model":{}}],"id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/main/section/simple_copy_copy_cop","model":{}},{"organism":"PromoSimple.Text","color":"brand1-subtle","colspan":8,"id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/main/section/text","model":{"text":"\u003Ch3\u003EKey Takeaways\u003C/h3\u003E\n\u003Cul\u003E\n\u003Cli\u003EModern turbine oils need strong antioxidants for thermal stability, but these can sometimes affect elastomer seals.\u003C/li\u003E\n\u003Cli\u003EASTO 560 and AeroShell Ascender maintain low elastomer swelling, even at high temperatures, to ensure reliable seal integrity.\u003C/li\u003E\n\u003Cli\u003EThese optimised oils reduce maintenance, enhance safety and improve efficiency for demanding aviation applications.\u003C/li\u003E\n\u003C/ul\u003E\n"}},{"organism":"PromoSimple.Text","color":"inherited","colspan":8,"id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/main/section/text_copy_copy","model":{"text":"\u003Cp\u003EIn a race to meet the ever-increasing demand of modern day turbine engines with higher operating temperatures and higher pressures requirement, oil manufacturers have had to use an effective antioxidant system to develop a high thermal stability oil.\u003Cbr\u003E\r\n\u003C/p\u003E\r\n"}},{"organism":"PromoSimple.Text","color":"inherited","colspan":8,"id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/main/section/text_copy_copy_966942473","model":{"text":"\u003Cp\u003E\u003Cb style=\"font-size: 0.8125rem;\"\u003EWhy elastomer compatibility matters\u003C/b\u003E\u003C/p\u003E\r\n\u003Cp\u003ENow here lies the problem for lubricant development chemists. Some antioxidants can provide excellent thermal stability and low coking propensity, but they can be aggressive to certain elastomer materials used in some engine oil systems. This can result in swelling or deterioration of rubber ‘O’ rings, leading to leaks and high oil consumption. The trick is to find a balance with an additive system that provides excellent thermal stability, but is fully compatible with elastomer materials in the engine.\u003Cbr\u003E\r\n\u003C/p\u003E\r\n"}},{"organism":"PromoSimple.Text","color":"inherited","colspan":8,"id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/main/section/text_copy","model":{"text":"\u003Cp\u003E\u003Cb\u003EElastomer compatibility testing\u003C/b\u003E\u003C/p\u003E\n\u003Cp\u003EIn an elastomer compatibility test in SAE AS5780, oils are tested for 24 and 120 hours at a temperature of 200˚C and tested for the percentage weight change. For the more aggressive testing of 120 hours, the below results showed that a competitor’s High Performance Capability (HPC) oil has about twice the swelling rate compared to ASTO 560 and AeroShell Ascender on Viton GLC seals.\u003C/p\u003E\n\u003Ctable cellpadding=\"1\" cellspacing=\"0\" border=\"1\"\u003E\n\u003Ctbody\u003E\u003Ctr\u003E\u003Cth scope=\"col\"\u003E \u003C/th\u003E\n\u003Cth scope=\"col\"\u003EFluorocarbon (Viton A), % swell change after 24 hours\u003C/th\u003E\n\u003Cth\u003EFluorocarbon (Viton A), % swell change after 120 hours\u003C/th\u003E\n\u003Cth\u003ELCS Fluorocarbon (Viton GLC), % swell change after 24 hours\u003C/th\u003E\n\u003Cth\u003ELCS Fluorocarbon (Viton GLC), % swell change after 120 hours\u003C/th\u003E\n\u003C/tr\u003E\u003Ctr\u003E\u003Ctd\u003ESAE AS5780 HPC limit\u003C/td\u003E\n\u003Ctd\u003E11% max\u003C/td\u003E\n\u003Ctd\u003E15% max\u003C/td\u003E\n\u003Ctd\u003E12% max\u003C/td\u003E\n\u003Ctd\u003E20% max\u003C/td\u003E\n\u003C/tr\u003E\u003Ctr\u003E\u003Ctd\u003ECompetitor’s HPC oil\u003C/td\u003E\n\u003Ctd\u003E9.5\u003C/td\u003E\n\u003Ctd\u003E11.5\u003C/td\u003E\n\u003Ctd\u003E8\u003C/td\u003E\n\u003Ctd\u003E15\u003C/td\u003E\n\u003C/tr\u003E\u003Ctr\u003E\u003Ctd\u003EAeroShell Ascender\u003C/td\u003E\n\u003Ctd\u003E9\u003C/td\u003E\n\u003Ctd\u003E10\u003C/td\u003E\n\u003Ctd\u003E6.5\u003C/td\u003E\n\u003Ctd\u003E8\u003C/td\u003E\n\u003C/tr\u003E\u003Ctr\u003E\u003Ctd\u003EAeroShell Ascender\u003C/td\u003E\n\u003Ctd\u003E7.5\u003C/td\u003E\n\u003Ctd\u003E9\u003C/td\u003E\n\u003Ctd\u003E6\u003C/td\u003E\n\u003Ctd\u003E8\u003C/td\u003E\n\u003C/tr\u003E\u003C/tbody\u003E\u003C/table\u003E\n\u003Cp\u003EAfter eight days of embrittlement testing, the Viton A o-ring tested in the competitor’s HPC oil has developed cracks, indicating that it may not be able to maintain the required seal effectiveness:\u003C/p\u003E\n"}},{"organism":"Container","colspan":8,"children":[{"organism":"PromoSimple.Text","color":"inherited","colspan":4,"id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/main/section/simple/text","model":{"text":"\u003Cp\u003E\u003Cb\u003EAeroShell Ascender: Passed\u003C/b\u003E\u003C/p\u003E\r\n"}},{"organism":"PromoSimple.Text","color":"inherited","colspan":4,"id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/main/section/simple/text_copy","model":{"text":"\u003Cp\u003E\u003Cb\u003ECompetitor’s HPC oil: 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test.","width":3840,"height":2160}}},{"organism":"StandaloneAsset","color":"inherited","colspan":4,"id":"/content/shell/corporate/global/en_gb/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/jcr_content/root/main/section/simple/standalone_asset_cop","model":{"image":{"src":"https://www.shell.com/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/elastomer-compatibility/_jcr_content/root/main/section/simple/standalone_asset_cop.shellimg.jpeg/1733398036753/competitor-hpc-oil-viton-glc.jpeg","alt":"Viton A o-ring broke after eight days of embrittlement testing using a competitor’s HPC oil, failed 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