GB/T 12008.3-2009 Active National standards

GB/T 12008.3-2009 Plastics—Polyether polyols—Part 3:Determination of hydroxyl number

Publish Date: 2009-06-15 Implement Date: 2010-02-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 12008.3-2009

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Basic standards and general methods for synthetic resins and plastics

ICS Name: Plastic

Publish Date: 2009-06-15

Implement Date: 2010-02-01

Pages: 10 pages

Scope

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.