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ASTM D4274-16

Standard Test Methods for Testing Polyurethane Raw Materials: Determination of Hydroxyl Numbers of Polyols

Automaticky preložený názov:

Štandardné testovacie metódy pre testovanie Polyuretánové surovín: Stanovenie hydroxylového čísla polyolov

NORMA vydaná dňa 1.4.2016

Jazyk
Prevedenie	PDF - okamžité stiahnutie - 70.10 € Tlačené - 70.10 €
Dostupnosť	SKLADOM
Cena	70.10 € bez DPH
70.10 €

Informácie o norme:

Označenie normy: ASTM D4274-16
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.4.2016
Kód tovaru: NS-635678
Počet strán: 10
Približná hmotnosť: 30 g (0.07 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM

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Kategórie - podobné normy:

Termoplasty

Anotácia textu normy ASTM D4274-16 :

Keywords:
acetic anhydride, esterification, hydroxyl number, phthalic anhydride, polyester, polyether, polyol, pyromellitic dianhydride, titration,, ICS Number Code 83.080.20 (Thermoplastic materials)

Doplňujúce informácie

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

E180-03	Standard Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals (Withdrawn 2009)
D1193-06(2018)	Standard Specification for Reagent Water
E200-23	Standard Practice for Preparation, Standardization, and Storage of Standard and Reagent Solutions for Chemical Analysis
E203-24	Standard Test Method for Water Using Volumetric Karl Fischer Titration
E222-23	Standard Test Methods for Hydroxyl Groups Using Acetic Anhydride Acetylation
D883-24	Standard Terminology Relating to Plastics
E691-23	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ISO14900	PlasticsPolyols for Use in the Production of PolyurethaneDetermination of Hydroxyl Number
ISO6796	Polyglycols for Industrial UseDetermination of Hydroxyl NumberPhthalic Anhydride Esterification Method

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