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Determination of harmful substances in textile dyeing and finishing auxiliaries - Part 6: Determination of isocyanate groups in polyurethane prepolymers
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ASTM D5629-23
Standard Test Method for Polyurethane Raw Materials: Determination of Acidity in Low-Acidity Aromatic Isocyanates and Polyurethane Prepolymers
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UNE 53984-3-1998
PLASTICS. TEST METHODS FOR POLYURETHANE RAW MATERIALS. PART 3: DETERMINATION OF THE ISOMER CONTENT IN MIXTURES OF 2,4- AND 2,6-TOLUENEDIISOCYANATE.
塑料 聚氨酯原材料的试验方法 第3部分:2,4-和2,6-甲苯二异氰酸酯混合物中异构体含量的测定