ASTM-D4661 › Historical Revision Information
Standard Test Methods for Polyurethane Raw Materials: Determination of Total Chlorine in Isocyanates
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Scope
1.1 These test methods determine the total chlorine content of aromatic isocyanates used as polyurethane raw materials. The difference between the total chlorine content and the hydrolyzable chlorine content (see Test Method D4663) is a measure of the amount of o-dichlorobenzene and other ring-substituted chlorinated products that are present. Both procedures are applicable to a variety of organic compounds but the amount of sample used may have to be varied. (See Note 1.)
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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
5.1 These test methods can be used for research or for quality control to determine the total chlorine content of aromatic isocyanates. In some instances total chlorine content may correlate with performance in polyurethane systems.
Keywords
aromatic isocyanates; chlorine; isocyanates; oxygen bomb; polyurethane raw materials; Schöniger ignition; titration; ICS Number Code 83.080.10 (Thermosetting materials)
To find similar documents by ASTM Volume:
08.02 (Plastics (II): D3222 - D5083)
To find similar documents by classification:
83.080.10 (Thermosetting materials Including ebonite Silicones, see 71.100.55)
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Document Number
ASTM-D4661-13
Revision Level
2013 EDITION
Status
Superseded
Modification Type
Revision
Publication Date
Nov. 15, 2013
Document Type
Test Method
Page Count
5 pages
Committee Number
D20.22