Phenothiazine Derivatives as Antioxidants for Engine Oils

Phenothiazine derivatives have been known to function as antioxidants for engine oils, transmission fluids and industrial lubricants. Alkylated phenothiazines are amines which contain sulfur and have lower bond dissociation energy, i.e. a higher rate constant than their “parent”...

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Autores principales:	David Chasan, Edward Ng
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2010
Materias:	phenothiazine antioxidants oxidation stability Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/014b203af5f841ed932c3229989c930b
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spelling	oai:doaj.org-article:014b203af5f841ed932c3229989c930b2021-11-05T09:26:57ZPhenothiazine Derivatives as Antioxidants for Engine Oils1881-219810.2474/trol.5.220https://doaj.org/article/014b203af5f841ed932c3229989c930b2010-10-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/5/4/5_4_220/_pdf/-char/enhttps://doaj.org/toc/1881-2198Phenothiazine derivatives have been known to function as antioxidants for engine oils, transmission fluids and industrial lubricants. Alkylated phenothiazines are amines which contain sulfur and have lower bond dissociation energy, i.e. a higher rate constant than their “parent” alkylated diphenylamines. They are highly reactive towards radicals and are therefore excellent inhibitors against autoxidation and polymerisation. Since alkylated phenothiazines can provide superior oxidation stability, help to prolong the useful life of lubricants and significantly improve the durability and resistance of lubricants when exposed to high temperatures, they are of increasing importance. Performance requirements have become more stringent in the past 10 to 20 years and the demand for longer drain intervals has grown steadily. Also, the use of Group II, III and IV base oils is becoming more wide spread. Such base oils have very little sulfur content since natural sulfur-containing antioxidants are either absent or removed during the severe refining process. These evolutions in performance and base oil chemistry can be well handled by the use of phenothiazine chemistryDavid ChasanEdward NgJapanese Society of Tribologistsarticlephenothiazineantioxidantsoxidation stabilityPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 5, Iss 4, Pp 220-224 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	phenothiazine antioxidants oxidation stability Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	phenothiazine antioxidants oxidation stability Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 David Chasan Edward Ng Phenothiazine Derivatives as Antioxidants for Engine Oils
description	Phenothiazine derivatives have been known to function as antioxidants for engine oils, transmission fluids and industrial lubricants. Alkylated phenothiazines are amines which contain sulfur and have lower bond dissociation energy, i.e. a higher rate constant than their “parent” alkylated diphenylamines. They are highly reactive towards radicals and are therefore excellent inhibitors against autoxidation and polymerisation. Since alkylated phenothiazines can provide superior oxidation stability, help to prolong the useful life of lubricants and significantly improve the durability and resistance of lubricants when exposed to high temperatures, they are of increasing importance. Performance requirements have become more stringent in the past 10 to 20 years and the demand for longer drain intervals has grown steadily. Also, the use of Group II, III and IV base oils is becoming more wide spread. Such base oils have very little sulfur content since natural sulfur-containing antioxidants are either absent or removed during the severe refining process. These evolutions in performance and base oil chemistry can be well handled by the use of phenothiazine chemistry
format	article
author	David Chasan Edward Ng
author_facet	David Chasan Edward Ng
author_sort	David Chasan
title	Phenothiazine Derivatives as Antioxidants for Engine Oils
title_short	Phenothiazine Derivatives as Antioxidants for Engine Oils
title_full	Phenothiazine Derivatives as Antioxidants for Engine Oils
title_fullStr	Phenothiazine Derivatives as Antioxidants for Engine Oils
title_full_unstemmed	Phenothiazine Derivatives as Antioxidants for Engine Oils
title_sort	phenothiazine derivatives as antioxidants for engine oils
publisher	Japanese Society of Tribologists
publishDate	2010
url	https://doaj.org/article/014b203af5f841ed932c3229989c930b
work_keys_str_mv	AT davidchasan phenothiazinederivativesasantioxidantsforengineoils AT edwardng phenothiazinederivativesasantioxidantsforengineoils
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Phenothiazine Derivatives as Antioxidants for Engine Oils

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