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

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Scope

1.1 This Part of GB/T 12008 specifies two methods for the determination of the
hydroxyl value of polyether polyols.
1.2 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.
1.3 Method B specifies the determination of hydroxyl value in polyether polyols
by near infrared spectroscopy. It describes the steps of sample selection, data
collection, establishment and verification of calibration models.

Basic Data

Standard ID	GB/T 12008.3-2009 (GB/T12008.3-2009)
Description (Translated English)	Plastics -- Polyether polyols -- Part 3: Determination of hydroxyl number
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G31
Classification of International Standard	83.080
Word Count Estimation	12,172
Date of Issue	2009-06-15
Date of Implementation	2010-02-01
Older Standard (superseded by this standard)	GB/T 12008.3-1989
Quoted Standard	GB/T 601-2002; GB/T 2035-2008; GB/T 6682-2008; ASTM D 7253-2006
Adopted Standard	ISO 14900-2001, NEQ; ASTM D6342-2008, NEQ
Regulation (derived from)	National Standard Approval Announcement 2009 No.8 (Total No.148)
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This standard specifies two methods for determination of the hydroxyl value of polyether polyols. A method of phthalic anhydride method. Recommended for the polyether polyol, ammonia polymer polyol and a polyol as the initiator. But for the steric effect of polyols results low. If you can take corrective measures, other polyols can also be applied this method. Method B provides for determination of the hydroxyl value of polyether polyols using near infrared spectroscopy. Describes the selection of the sample, data collection, steps to establish and verify calibration of the model.