ASTM_D_1952_-_86_1995e1.pdf

Designation:D 1952 86(Reapproved 1995)e1Standard Test Method forQuantitative Determination of Break in Drying Oils1This standard is issued under the fixed designation D 1952;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.e1NOTEKeywords were added editorially in May 1995.1.Scope1.1 This test method covers the quantitative determinationof break in drying oils.This test method is applicable to rawand refined drying or fatty oils that have not been substantiallypolymerized,oxidized,or chemically modified.1.2 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of whoever uses this standard to consult andestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.Specific hazard statements are given in Section 8.2.Referenced Documents2.1 ASTM Standards:E 1 Specification for ASTM Thermometers23.Terminology3.1 Description of Term Specific to This Standard:3.1.1 breakin drying oils,that material rendered insolublewhen an oil is heated to polymerization or varnish-makingtemperatures.4.Summary of Test Method4.1 The oil under test is treated with hydrochloric acidheated to 290C,allowed to cool,diluted with carbon tetra-chloride,and the resulting insoluble break is separated andweighed.5.Significance and Use5.1 This test method provides a quantitative determinationof the amount of non-oil material that will become insolublewhen the oil is heated.Break is not significant except in oilsthat are to be heated,as in manufacture of varnishes and alkydresins.This test method is not applicable to polymerized,oxidized,or chemically modified oils.The break is renderedinsoluble in the oil by the addition of hydrochloric acid andheating to a specified temperature.Since the temperature mustbe specified,the results are empirical.6.Apparatus6.1 Beaker,100-mL capacity,tall-form.6.2 ThermometerAn ASTM Open Flash Thermometerhaving a range from 6 to+400C and conforming to therequirements for Thermometer 11C as prescribed in Specifica-tion E 1.6.3 Filtering Crucible,porcelain bitumen-type,with topdiameter of 44 mm and depth of 25 mm prepared by mattingwith medium fiber asbestos(PrecautionSee 8.1),drying toconstant weight(within 0.1 mg)at 105C,and cooling in adesiccator.7.Reagents and Materials7.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended thatall reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the American Chemical Society,where such specifications are available.3Other grades may beused,provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use without lessening theaccuracy of the determination.7.2 Carbon Tetrachloride(CCl4)(PrecautionSee 8.3).7.3 Filter AidDiatomaceous silica4dried at 105C andstored in a desiccator.7.4 Hydrochloric Acid(sp gr 1.19)Concentrated hydro-chloric acid(HCl)(PrecautionSee 8.2).8.Hazards8.1 AsbestosInhalation of asbestos fiber or dust has beenfound to be a cause of asbestosis and lung cancer.Handle dry1This test method is under the jurisdiction of ASTM Committee D-1 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.32 on Drying Oils.Current edition approved March 27,1986.Published May 1986.Originallypublished as D 1952 61.Last previous edition D 1952 61(1984)e1.2Annual Book of ASTM Standards,Vol 14.03.3Reagent Chemicals,American Chemical Society Specifications,AmericanChemical Society,Washington,DC.For suggestions on the testing of reagents notlisted by the American Chemical Society,see Analar Standards for LaboratoryChemicals,BDH Ltd.,Poole,Dorset,U.K.,and the United States Pharmacopeiaand National Formulary,U.S.Pharmaceutical Convention,Inc.(USPC),Rockville,MD.4Hyflo Super-Cel,produced by Johns-Manville Corp.,has been found satisfac-tory for this purpose.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.NOTICE:This standard has either been superceded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.asbestos in a suitable hood.Prewetting of asbestos with wateror solvent can help reduce the concentration of airborneparticles.Use of a particulate filter face mask is recommended.See suppliers Material Safety Data Sheet for proper handlingprocedures.8.2 Hydrochloric AcidConcentrated hydrochloric acid iscorrosive and may cause burns to the skin and eyes;the vaporis irritating to mucous membranes.Avoid contact with skin andeyes.Wash clothing be