ASTM-D4876 › Historical Revision Information
Polyurethane Raw Materials: Determination of Acidity of Crude or Modified Isocyanates, Sta
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Scope
1.1 This test method determines the total acidity, expressed as HCl, of crude or modified isocyanates. The test method is applicable to products derived from toluene di iso cyanate, methylene-bis-(4-phenyl iso cyanate), and polymethylene polyphenyl iso cyanates. (See Note 1.)
1.2 The values stated in SI units are to be regarded as the standard.
1.3 This standard does not purport to address all of the safety problems, 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. For specific hazards statements see 7.1 and Note 2.
Note 1-There is no equivalent ISO standard.Keywords
Acidity, alkalinity, pH-plast; Hydrochloric acid; polyurethane raw materials- acidity of crude/modified isocyanates,; test,; Urethanes-polyurethane raw materials (isocyanates); acidity of crude/modified isocyanates, test; ICS Number Code 83.040.30 (Auxiliary materials and additives for plast); 83.080.20 (Thermoplastic materials)
To find similar documents by ASTM Volume:
08.02 (Plastics (II): D3222 - D5083)
To find similar documents by classification:
83.080.20 (Thermoplastic materials)
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Document Number
ASTM-D4876-88
Revision Level
1988 EDITION
Status
Superseded
Modification Type
Replaced
Publication Date
Nov. 25, 1988
Document Type
Test Method
Page Count
2 pages
Committee Number
D20.22