1、IND-STD ASTM DLb42-93 NOTICE L m 9999998 00Lb58b 037 m NOTICE;O F ADOPTION ASDI D1642-70(R87)1 I b$1974 ADOPTlOh NOTICE ELASTICII Oh TOUGHNESS OF VA&ISHES The above non-Government document was aopted on 1 1 Uay 1993 and ie approved for use by the DoD.Standardiaation Documenta Order Desk,Bldg.433,700
2、 Bobbins Avenue,Philadelphia,P A 19111-5044 for issue to DOU activitiee only.A l l others desiring copies muet obtain them from ASTH,1916 Race Street,Philadelphia,P A 19103-1187,or from some other authorieed dietributor.Copies of the document ahould be ordered from RELEASING NON-GOVERNMENT STANDARDS
3、 BODY:ASTH ASTM APPROVAL DATE:i 5 April 1993 SUPERSEDES:Methods 451,4152,FTMS#i41 Custodians:Amy-MR I k y -SH Air Force-99 Military Coordinating Activity:Army-MFt Project 8010-0560 User activity:Navy YD FSC 8010 Approved f o r public release;distribution unlimited.DISTRIBUTIOh STAYEMENY A NOTICE:Thi
4、s standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.ASTM Dlb42 93 0759530 0522b95 T28()Designation:D 1642-93 AMERICAN SOCIETY FOR TESTING AND MATERIALS 191 6 Race St.Philadelphia,Pa 191 03 Reprinted fr
5、om the Annual Book oi ASTM Standards.Copyrigh ASTM if not listed in the current combined index,will appear in the nexi editbn Standard Test Methods For Elasticity or Toughness of Varnishes This standard is issued under the fixed designation D 1642;the number immediately following the designation ind
6、icates the year of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon(t)indicates an editorial change since the last revision or reapproval.These meihods have been approved for use by agencies o f
7、 the Deparimeni of Defense i o replace Methods 4151.4152 of Federal Tes1 Method Siandard No,141.Consult ihe DoD Index of Spec$cations and Siandards for ihe spec$c year o f issue that has been adopted by the Deparimeni of Defense.1.Scope 1.1 These test methods cover the determination of elas-ticity o
8、r toughness of any varnish which is miscible with the diluents specified,under the conditions of the test.1.2 This standard does not purport to address all o f the safety problems,if any,associated with its use.It is the responsibility o f the user o f this standard to establish appro-priate safety
9、and health practices and determine the applica-bility o f regulatory limitations prior to use.2.Referenced Documents 2.1 ASTM Standards:D 13 Specification for Spirits of Turpentine2 D 235 Specification for Mineral Spirits(Petroleum Spirits)(Hydrocarbon Dry Cleaning solvent)D 6 1 1 Test Methods for A
10、niline Point and Mixed Aniline Point of Petroleum Products and Hydrocarbon Solvents D848 Test Method for Acid Wash Color of Industrial Aromatic Hydrocarbons3 D 1644 Test Methods for Nonvolatile Content of Varnishes4 E 1 Specification for ASTM Thermometers5 E 28 Test Method for Softening Point by Rin
11、g-and Ball Apparatus2 3.Summary of Test Methods 3.1 Elasticity or toughness of the varnish may be deter-mined by proportionately reducing its elasticity or toughness by the addition of a standard solution of a resin.The long-accepted use of run-kauri gum may now be less convenient due to a limited s
12、upply of this resin.Accordingly,an equally acceptable resin is prescribed in Test Method A(Sections 4 to 7).Test Method A is based on the preparation of a rosin-pentaerythritol ester,the properties of which in terms of acid value and melting point can be controlled,and on a solvent that is free of a
13、ny inherent polymerization tendency.Where desired,run-kauri gum may be used as prescribed in Test Method B(Sections 8 to 10).I These test methods are under the jurisdiction of ASTM Committee D-1 on Paint and Related Coatings,Materials,and Applications and are the direct responsibility of Subcommitte
14、e W1.33 on Polymers and Resins.Current edition approved April 15,1993.Published June 1993.Originally published as D 1642-59.Last previous edition D 1642-70(1987).Annual Book of ASTM Standards,Vol 06.03.3 Annual Book of ASTM Standards,Vol 06.04.Annual Book of ASTM Siandards,Vol 06.01.Annual Book ofAS
15、TM Standards,Vol 14.03.3.2 For varnishes that are less elastic or tougher than zero standard resin reduction,Test Method C(Sections 11 to 14),based on proportionately increasing the elasticity or tough-ness of the varnish by means of the addition of linseed oil,is provided.TEST METHOD A-STANDARD ROS
16、IN PENTAERYTHRITOL ESTER RESIN REDUCTION 4.Preparation of the Rosin-Pentaerythritol Ester Solution 4.1 Apparatus:4.1,1 Flask,3-L,3-neck flask.4.1.2 Gas Burner having a capacity of 12 O00 Btu/h(3.5 kW).4.1.3 Agitator-Motor-driven agitator with blade penph-era1 speed of 600 ft(182.9 m)/min.The agitator shall be of the three-blade type with a blade width of in.(19 mm)and a blade diameter of 13/!in.(44.5 mm).4.1.4 Thermometer-An ASTM Partial Immersion Ther-mometer having a range from 20 to 760 F,16
