ASTM-D7389 › Standard Test Method for Acid Number (Empirical) of Maleic Anhydride (MAH) Grafted Waxes
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Scope
1.1 This test method covers the determination of the acid number of maleic anhydride (MAH) grafted waxes. The number is obtained by direct titration of the material and indicates the amount of free acid present.
1.2 This test method is applicable to MAH-grafted waxes because it uses a special sample preparation step (7.1) that is not required for other waxes. The special sample preparation reverses the hydrolysis of acid anhydride that can occur during storage of the wax.
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.
Significance and Use
This test method is used to determine the free acid content of MAH-grafted waxes. The potential hydrolysis of the anhydride functionality of this wax in storage makes them unsuitable for determining free acid content by Test Method D 1386
Keywords
acid anhydride function; acid number; free acid; MAH grafted waxes; polish; synthetic waxes; titration; waxes; ICS Number Code 75.140 (Waxes, bituminous materials and other petroleum products)
To find similar documents by ASTM Volume:
15.04 (Soaps and Other Detergents; Polishes; Leather; Resilient Floor Coverings)
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Document Number
ASTM-D7389-07R19
Revision Level
2007 R19 EDITION
Status
Current
Modification Type
New
Publication Date
July 1, 2019
Document Type
Test Method
Page Count
2 pages
Committee Number
D21.02