1、Designation:D 1467 89(Reapproved 1995)e1Standard Guide for TestingFatty Acids Used in Protective Coatings1This standard is issued under the fixed designation D 1467;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last rev
2、ision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.e1NOTEKeywords were added editorially in May 1995.1.Scope1.1 This guide covers the selection and application ofprocedures for testing fatty a
3、cids such as cottonseed,linseed,soybean,dehydrated castor,tall oil,etc.used in protectivecoatings.1.2 The test methods included are listed as follows:Test MethodSectionASTMTest MethodAcid Value4D 1980Appearance13D 1544Ash9D 1951Clarity13D 2090Color:GardnerPlatinum-Cobalt1414D 1544D 1209Color Change
4、After Heating6D 1981Fatty Acid Composition12D 1983Hydroxyl Value10D 1957Rosin Acids11D 1240Sampling3D 1466Saponification Value7D 1962Titer15D 1982Unsaponifiable Matter8D 1965Unsaturation:Diene ValueIodine Value55D 1358D 19591.3 This standard does not purport to address all of thesafety concerns,if a
5、ny,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:D 1209 Test Method for Color of Clear Liquids(Platinu
6、m-Cobalt Scale)2D 1240 Test Method for Rosin Acids Content of NavalStores,Including Rosin,Tall Oil and Related Products3D 1358 Test Methods for Spectrophotometric Diene Valueof Dehydrated Castor Oil and Its Derivatives3D 1466 Test Method for Sampling Liquid Oils and FattyAcids Commonly Used in Paint
7、s,Varnishes,and RelatedMaterials3D 1541 Test Method for Total Iodine Value of Drying Oilsand Their Derivatives3D 1544 Test Method for Color of Transparent Liquids(Gardner Color Scale)4D 1951 Test Method for Ash in Drying Oils and FattyAcids3D 1957 Test Method for Hydroxyl Value of Fatty Oils andAcid
8、s3D 1959 Test Method for Iodine Value of Drying Oils andFatty Acids3D 1962 Test Method for Saponification Value of DryingOils,Fatty Acids,and Polymerized Fatty Acids3D 1965 Test Method for Unsaponifiable Matter in DryingOils,Fatty Acids and Polymerized Fatty Acids3D 1980 Test Method for Acid Value o
9、f Fatty Acids andPolymerized Fatty Acids3D 1981 Test Method for Measuring Color After Heating ofFatty Acids3D 1982 Test Method for Titer of Fatty Acids3D 1983 Test Method for Fatty Acid Composition by Gas-Liquid Chromatography of Methyl Esters3D 2090 Test Method for Clarity and Cleanness of Paint an
10、dInk Liquids3D 3457 Test Method for Preparation of Methyl Esters fromFatty Acids for Determination of Fatty Acid Compositionby Gas-Liquid Chromatography32.2American Oil Chemists Society(AOCS)Methods:5Tj-1a Polyunsaturated AcidsCc-13b Color,Wesson Method(Lovibond)Td-2a Photometric Index3.Sampling3.1
11、Sample the material in accordance with Test MethodD 1466.3.2 Fatty acids are frequently solid at room temperature andshall be completely liquified and blended prior to testing.Temperatures during liquefying of the fatty acids should notexceed 10 to 15C above the melting point of the sample.1These me
12、thods are under the jurisdiction of ASTM Committee D-1 on Paintand Related Coatings,Materials,and Applications and are the direct responsibilityof Subcommittee D01.32 on Drying Oils.Current edition approved March 31,1989.Published May 1989.Originallypublished as D 1467 57 T.Last previous edition D 1
13、467 72(1981)e1.2Annual Book of ASTM Standards,Vol 06.04.3Annual Book of ASTM Standards,Vol 06.03.4Annual Book of ASTM Standards,Vol 06.01.5Available from American Oil Chemists Society,508 S.6th St.,Champlain,IL61820.1AMERICAN SOCIETY FOR TESTING AND MATERIALS100 Barr Harbor Dr.,West Conshohocken,PA
14、19428Reprinted from the Annual Book of ASTM Standards.Copyright ASTM3.3 Samples should be stored preferably in the dark,in fullglass containers.Partially filled containers should be filled withinert gas or carbon dioxide to prevent oxidation.4.Acid Value4.1 Acid value is a measure of the quantity of
15、 free fattyacids and is defined as the number of milligrams of potassiumhydroxide required to neutralize the fatty acids in 1 g ofsample.Acid value determination is useful in establishing theidentity and purity of a fatty acid.4.2 Determine the acid value in accordance with TestMethod D 1980 which i
16、s the referee method.Other solventsshould be checked out carefully before using for controlpurposes.5.Unsaturation5.1 Iodine value is a convenient test for expressing thedegree of unsaturation of a fatty acid.Iodine value is theweight percent of iodine absorbed.5.2 Determine the iodine value in accordance with TestMethod D 1959 which gives fairly good accuracy and preci-sion(Note 1)when applied to normal fatty acids.When TestMethod D 1959 is applied to fatty acids containing conjugateddouble bon
