標(biāo)準(zhǔn)名稱

ASTM D5155 Standard Test Methods for Polyurethane Raw Materials Determination of the Isocyanate Content of Aromatic Isocyanates

ASTM D5155芳香異氰酸酯中的異氰酸酯含量的聚亞胺酯原材料方測定的標(biāo)準(zhǔn)試驗(yàn)方法

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適用范圍

Scope:

These test methods are used to measure the isocyanate content of aromatic isocyanates used as polyurethane raw materials.

Test Method A—Unheated toluene- dibutylamine deter-mines the toluene diisocyanate content, the amine equivalent and the isocyanate content of refined toluene-2,4-diisocyanate and toluene-2,6-diisocyanate, or mixtures of the two. Other isomers, if present, will be included in the determination. This test method is also applicable to other isocyanates of suitable reactivity and solubility.

Test Method B—Heated toluene-dibutylamine deter-mines the amine equivalent and the isocyanate content ofcrudeor modified isocyanates derived from toluene diisocyanate,

methylene di-(4-phenylisocyanate) and polymeric (methylenephenylisocyanate).

Test Method C—Unheated trichlorobenzene-toluene-dibutylamine determines the amine equivalent and the isocya-nate content of crude or modified isocyanates derived from toluene diisocyanate, methylene-di-(4-phenylisocyanate) and polymeric (methylene phenylisocyanate)

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引用文件

ASTM D883 Terminology Relating to Plastics

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ASTM D1193 Specification for Reagent Water

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ASTM E180 Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals

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ASTM E456 Terminology Relating to Quality and Statistics

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ASTM E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

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ASTM E2935 Practice for Conducting Equivalence Testing in Laboratory Applications

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ISO 14896 Polyurethane Raw Materials-Determination of Isocyanate Content

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出自GF2022