GB/T 12008.3-1989: Palyether polyols--Determination of hydroxyl number

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Scope

This standard specifies the method for determining the hydroxyl number of
polyether polyols by the phthalic anhydride esterification method.
This standard applies to the determination of the hydroxyl number of polyether
polyols for polyurethane foams which are made by the ring-opening
polymerization of polyols, ethylene oxide and propylene oxide under the action
of a catalyst.

Basic Data

Standard ID	GB/T 12008.3-1989 (GB/T12008.3-1989)
Description (Translated English)	Palyether polyols--Determination of hydroxyl number
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G31
Classification of International Standard	83.08
Word Count Estimation	4,465
Date of Issue	12/25/1989
Date of Implementation	11/1/1990
Quoted Standard	GB/T 12008.5, GB 601
Adopted Standard	ASTM D2849-1969 (1980), NEQ
Regulation (derived from)	Announcement of Newly Approved National Standards 2009 No. 8 (No. 148 overall)
Issuing agency(ies)	State Bureau of Technical Supervision