We need your consent to use the individual data so that you can see information about your interests, among other things. Click "OK" to give your consent.
Standard Test Methods for Testing Polyurethane Raw Materials: Determination of Hydroxyl Numbers of Polyols
STANDARD published on 1.4.2016
Designation standards: ASTM D4274-16
Note: WITHDRAWN
Publication date standards: 1.4.2016
SKU: NS-635678
The number of pages: 10
Approximate weight : 30 g (0.07 lbs)
Country: American technical standard
Category: Technical standards ASTM
Keywords:
acetic anhydride, esterification, hydroxyl number, phthalic anhydride, polyester, polyether, polyol, pyromellitic dianhydride, titration,, ICS Number Code 83.080.20 (Thermoplastic materials)
Significance and Use | ||||||||||||||||||
5.1 These test methods are suitable for research and as quality control and specification tests. It is necessary to know the hydroxyl contents of polyols in order to formulate polyurethane systems. |
||||||||||||||||||
1. Scope | ||||||||||||||||||
1.1 These test methods measure the hydroxyl groups in polyester and polyether polyols containing primary and secondary hydroxyl groups. They also apply to many other hydroxyl-containing substances. 1.1.1 Test Method A—Acetic Anhydride Pressure Bottle, recommended for polyesters. 1.1.2 Test Method B—Phthalic Anhydride Pressure Bottle, recommended for polyethers and polyesters. 1.1.3 Test Method C—Phthalic Anhydride Reflux, recommended for polyethers and polyesters. 1.1.4 Test Method D—Imidazole–Catalyzed Phthalic Anhydride Pressure Bottle, recommended for polyethers, polyesters, polymer polyols, and amine-initiated polyols. 1.1.5 Test Method E—1.2 Another ASTM test method for measuring hydroxyl groups is Test Method E222. 1.3 The values stated in SI units are to be regarded as the standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Note 1: This standard, ISO 14900 and ISO 6796 address the same
subject matter, but differ in technical content.
|
||||||||||||||||||
2. Referenced Documents | ||||||||||||||||||
|
Do you want to be sure about the validity of used regulations?
We offer you a solution so that you could use valid and updated legislative regulations.
Would you like to get more information? Look at this page.
Latest update: 2024-09-25 (Number of items: 2 350 354)
© Copyright 2024 NORMSERVIS s.r.o.