GB/T 12008.3-2009 Translated English of Chinese Standard. (GBT 12008.3-2009, GB/T12008.3-2009, GBT12008.3-2009): Plastics - Polyether polyols - Part 3: Determination of hydroxyl number

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https://www.chinesestandard.net, 16 oct. 2020 - 17 pages
This Part of GB/T 12008 specifies two methods for the determination of the hydroxyl value of polyether polyols. Method A is phthalic anhydride method. It is recommended for polyether polyols, polymer polyols and polyols with ammonia as initiator. But for polyols with steric hindrance, the result shall be lower. If corrective measures can be taken, other polyols can also apply this method.
 

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