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ASTM D4817-88(2021)

Current Reaffirmation

Standard Classification for Rubber Compounding Materials—Stearic Acid

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1.1 This classification covers the compounding materials commercially known as stearic acid.

1.2 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


3.1 Stearic acid is important in the rubber vulcanization process. It is believed that the stearic acid reacts with zinc-oxide or other metallic oxides, during vulcanization, to form a rubber soluble salt or soap, that reacts with the accelerator enabling it to exert its full effect.

3.2 Stearic acid of commerce is generally a mixture of palmitic, stearic, and oleic acids usually derived from tallow base stock but can be derived from other fats and oils of animal or vegetable origins.

SDO ASTM: ASTM International
Document Number D4817
Publication Date Nov. 1, 2021
Language en - English
Page Count 2
Revision Level 88(2021)
Supercedes
Committee D11.20
Publish Date Document Id Type View
Nov. 1, 2021 D4817-88R21 Reaffirmation
Feb. 1, 2017 D4817-88R17 Reaffirmation
May 1, 2012 D4817-88R12 Reaffirmation
May 1, 2005 D4817-88R05 Reaffirmation
Nov. 10, 1999 D4817-88R99 Reaffirmation