Analyzing the acid value, hydroxyl value, and isocyanate content is essential for evaluating the quality of raw materials used in plastic production. The acid number of polyol raw material is commonly ...

In the application bulletin discussed in this article, the determination of acid number (according to ASTM D4662 and ASTM D7253), hydroxyl number (according to ASTM E1899 and DIN 53240-3) and ...