GB/T 12008.3-2009 Active
GB/T 12008.3-2009 Plastics—Polyether polyols—Part 3:Determination of hydroxyl number
Abstract
1.1 This part of GB/T 12008 specifies two methods for determining the hydroxyl value of polyether polyols.
1.2 Method A is the phthalic anhydride method, which is recommended for polyether polyols, polymer polyols, and polyols prepared with ammonia as the initiator. However, for polyols with steric hindrance effects, the results may be too low. If corrective measures can be taken, this method can also be applied to other polyols.
1.3 Method B specifies the determination of the hydroxyl value in polyether polyols by near-infrared spectroscopy. It describes the selection of samples, data collection, and the steps of establishing and validating the calibration model.
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 12008.3-2009 |
| CCS | Basic standards and general methods for synthetic resins and plastics |
| ICS | Plastic |
| Implement Date | 2010-02-01 |