ASTM D5629-99
Historical Standard: ASTM D5629-99 Standard Test Method for Polyurethane Raw Materials Determination of Acidity in Low-Acidity Aromatic Isocyanates and Polyurethane Prepolymers
SUPERSEDED (see Active link, below)
ASTM D5629
1. Scope
1.1 This test method covers the acidity, expressed as ppm of hydrochloric acid, in aromatic isocyanate or polyurethane prepolymer samples of below 100 ppm acidity. The test method is applicable to products derived from toluene diisocyanate and methylene-bis-(4-phenylisocyanate) (see Note 1).
Note 1-There are no equivalent ISO standards.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 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.
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
D6099 Test Method for Polyurethane Raw Materials: Determination of Acidity in Moderate to High Acidity Aromatic Isocyanates
E180 Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ISO Standards
ISO14898 PlasticsAromatic Isocyanates for Use in the Production of PolyurethaneDetermination of AcidityKeywords
acidity; aromatic isocyanates; isocyanates; methylene-bis-(4-phenylisocyanate); methylene di(phenylisocyanate); methylene diphenyldiisocyanate; MDI; prepolymer; polyurethane; raw materials; test method; TDI; titration; toluene diisocyanate; Toluene diisocyanate (TDI); Aromatic isocyanates; Isocyanates; MDI (methylenediphenyldiisocyanate); Acidity, alkalinity, pH--plastics; Polyurethane raw materials--isocyanates; Prepolymers; Titration;
ICS Code
ICS Number Code 83.080.10 (Thermosetting materials)
DOI: 10.1520/D5629-99
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