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Description of ASTM-D4661 2009ASTM D4661-09Historical Standard: Standard Test Methods for Polyurethane Raw Materials: Determination of Total Chlorine in IsocyanatesASTM D4661Scope 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 D 4663) 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. Note 1—There is no equivalent ISO standard. Keywords aromatic isocyanates; chlorine; isocyanates; oxygen bomb; polyurethane raw materials; Schöniger ignition; titration; Chlorine content--plastics; Isocyanates; Isomer analysis; Mixed isomers; Oxygen bomb method; Polyurethane raw materials--isocyanates; Quality control (QC)--plastics; Sch¨oniger technique; Toluene diisocyanate (TDI) ICS Code ICS Number Code 83.080.10 (Thermosetting materials) DOI: 10.1520/D4661-09 The following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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