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  • ASTM
    D4663-10 Standard Test Method for Polyurethane Raw Materials Determination of Hydrolyzable Chlorine of Isocyanates
    Edition: 2010
    $91.10
    Unlimited Users per year

Description of ASTM-D4663 2010

ASTM D4663 - 10

Standard Test Method for Polyurethane Raw Materials Determination of Hydrolyzable Chlorine of Isocyanates

Active Standard ASTM D4663 | Developed by Subcommittee: D20.22

Book of Standards Volume: 08.02




ASTM D4663

Significance and Use

This test method can be used for research or for quality control to characterize toluene diisocyanates. Hydrolyzable chlorine correlates with performance in some polyurethane systems.

1. Scope

1.1 This test method determines the hydrolyzable chlorine content of toluene-2,4-diisocyanate, toluene-2,6-diisocyanate, or mixtures of the two. It is acceptable to apply this test method to other isocyanates of suitable solubility. (See Note 1.) The main sources of hydrolyzable chlorine in the isocyanates are carbamoyl chloride and dissolved phosgene. Both of these compounds react with alcohols and water, forming ureas, carbamates, carbon dioxide, and hydrochloric acid. (See Note 2.)

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

Note 1It is possible that this test method is applicable crude polymeric isocyanates. However, the precision with crude polymeric isocyanates has not been established.

Note 2There is no known ISO equivalent to this standard.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D883 Terminology Relating to Plastics

D1193 Specification for Reagent Water


Keywords

aromatic isocyanates; hydrolyzable chlorine; isocyanates; polyurethane raw materials; titration; toluene diisocyanate; Carbamoyl chloride; Carbon dioxide; Chlorine content--plastics; Hydrochloric acid (HCL); Hydrolyzable chlorine; Isocyanates; Methanol (methyl alcohol); Phosgene (dissolved); Polyurethane raw materials--isocyanates; Quality control (QC)--plastics; Reactivity; Toluene diisocyanate (TDI);


ICS Code

ICS Number Code 83.080.10 (Thermosetting materials)


DOI: 10.1520/D4663-10

ASTM International is a member of CrossRef.

ASTM D4663

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About ASTM

ASTM 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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