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Significance and Use
4.1 In general, with materials of this type, softening does not take place at a definite temperature. As the temperature rises, these materials gradually and imperceptibly change from brittle solids to soft, viscous liquids. For this reason, the determination of the softening point must be made by a fixed, arbitrary, and closely defined methods if the results are to be comparable.
1.1 This test method covers the determination of the softening point of certain alkali-soluble resins having uniform plastic flow characteristics as the melting point is approached.
1.2 The resin manufacturer should specify whether or not this test method may be used for his product(s).
1.3 This test method is not suitable for styrene-maleic anhydride resins.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D2398 Test Method for Softening Point of Bitumen in Ethylene Glycol (Ring-and-Ball)
E28 Test Methods for Softening Point of Resins Derived from Naval Stores by Ring-and-Ball Apparatus
E2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids
ICS Number Code 83.080.10 (Thermosetting materials)
UNSPSC Code 13111000(Resins)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D3642-13, Standard Test Method for Softening Point of Certain Alkali-Soluble Resins, ASTM International, West Conshohocken, PA, 2013, www.astm.orgBack to Top