ASTM-D4877 Standard Test Method for Polyurethane Raw Materials: Determination of APHA Color in Isocyanates

ASTM-D4877 - 2019 EDITION - CURRENT
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Standard Test Method for Polyurethane Raw Materials: Determination of APHA Color in Isocyanates
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Scope

1.1 This test method measures the color of clear liquids. It is applicable only to materials whose color-producing bodies have light-absorption characteristics similar to those of the platinum cobalt color standards used.2 (See Test Method D1209 and Note 1.) Suitable isocyanates include toluene diisocyanate, and pure or modified monomeric methylene di(phenylisocyanate).

1.2 The values stated in SI units are to be regarded as standard.

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

Note 1: This standard and ISO 6271-1 address the same subject matter, but differ in technical content.

1.4 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.

Significance and Use

5.1 This test method can be used for research or for quality control to characterize isocyanates used in polyurethane products.

5.2 For toluene diisocyanate, results from this test method can relate to reactivity or performance in polyurethane systems.

Keywords

APHA; color; isocyanates; platinum-cobalt scale polyurethane raw materials; Pt/Co scale;

To find similar documents by ASTM Volume:

08.02 (Plastics (II): D3222 - D5083)

08.03 (Plastics (III): D5117 - latest; Reinforced Plastic Piping Systems and Chemical Equipment; Plastic Building Products)

To find similar documents by classification:

71.080.30 (Organic nitrogen compounds)

83.040.30 (Auxiliary materials and additives for plastics Including fillers, extenders, hardeners, pigments, plasticizers, etc.)

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Document Number

ASTM-D4877-19

Revision Level

2019 EDITION

Status

Current

Modification Type

Revision

Publication Date

Aug. 1, 2019

Document Type

Test Method

Page Count

3 pages

Committee Number

D20.22