Hydroxyl value astm. Hydroxyl Groups Using Acetic Anhydride Acetylation1 .
Hydroxyl value astm g. Scope 1. 2 Review the current appropriate Material Safety Data Sheets D1957 Test Method for Hydroxyl Value of Fatty Oils and Acids (Withdrawn 2007)3 D2195 Test Methods for Pentaerythritol (Withdrawn 2011)3 2 For referenced ASTM standards, visit the ASTM website, www. The American Society for Testing and Materials (ASTM) has described several methods to The hydroxyl value method used in the Bulging Drum Problem might not have been precise enough to detect any differences between the good and bad EOs. Hydroxyl Groups Using Acetic Anhydride Acetylation1 2. Find the most up-to-date version of ASTM D1957 at GlobalSpec. The amount of sample weight is adjusted to the expected hydroxyl value. Find the most up-to-date version of ASTM D1957-86(2001) at GlobalSpec. 626 . What Is the Significance of the DIN 53240-2 Standard in This Study? Hydroxyl value is a fundamental characterization number that is extensively applicable in polymer science. 1. Application Bulletin 141/5 e Analysis of edible oils and fats Metrohm offers a turnkey solution for the determination of the hydroxyl value in polyols according to ASTM D6342-12 and ISO 15603:2011. Sample weight [g] 0 – 15 10 15 – 20 6 20 – 25 5 25 – 30 4 30 – 40 3 40 – 50 2. The ASTM D4274 standard provides a trusted and standardized method for determining the hydroxyl value of polyols in polyurethane-based products, making it an essential component of this study. 1-800-685-2088. In the case of a pure compound, the hydroxyl number is inversely proportional to the hydroxyl equivalent weight: This application note provides a detailed study for determining the hydroxyl value of polyols by titration. AB-322. What Is the Significance of the DIN 53240-2 Standard in This Study? The hydroxyl value is finally calculated by taking into account the total acid value determined separately by IS0 2114. For example, Voranol TM 446 ASTM D4273 ISO 14900 Hydroxyl number ASTM D7253 Acid value ASTM D 6437 Alkaline value ASTM D4878 Viscosity ASTM D4890 Colour ASTM D4672 ISO 14897 Water content The polyols used in RPUF are chosen to have a hydroxyl value of 250-1000 mg KOH/g, a functionality of 3. The OHV is usually determined by titration meth-ods as specified by ASTM D1957-86(2001), ASTM E Significance and Use 5. PDF - Free download as PDF File (. Also, it is rapid, 1. 1 DeÞnitions: 3. ASTM-D1957 - 1986 EDITION - SUPERSEDED Show Complete Document History. 1 Definitions: 3. 4 400 – 500 0. 9 --- Page 5 Ethoxylated Nonylphenol - 6EO Trade Name: KENON 6 Specification No. 1 Hydroxyl is an important functional group, and knowledge of its content is required in many intermediate and end use applications. The acid number of ASTM-D1980 Standard Test Method for Acid Value of Fatty Acids and Polymerized Fatty Acids (Withdrawn 2007) FED-STD-209 Airborne Particulate Cleanliness Classes in Cleanrooms and Clean Zones (Cancelled, replaced by ISO-14644 series) ASTM-D1209 Standard Test Method for Color of Clear Liquids (Platinum-Cobalt Scale) Hydroxyl value according to ASTM E1899; Iodine value based on EN ISO 3961, ASTM D5554, AOAC 920. Acknowledgements ASTM-D1957 › Historical Revision Information Hydroxyl Value of Fatty Oils and Acids. The measurement device consists of a DS2500 Near-infrared Analyzer with a pre-calibration model based on a large collection of real product spectra. 4-8. 1 It is necessary to know the hydroxyl number of polyols in order to formulate polyurethane systems. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website. Metrohm offers a turnkey solution for the determination of the hydroxyl value in polyols according to ASTM D6342-12 and ISO 15603:2011. Sample polymers were evaluated in via ASTM (American Society for T esting and Materials) D1622–08, and abrasion wear resistance via. Your One Source for Materials Analysis. More recently, Fourier transform near-infrared (FT-NIR) spectroscopy has been used to determine the hydroxyl value of various materials, per ASTM D6342-12. As polyols react stoichiometrically with isocyanates, the American Society for Testing and Materials (ASTM) E222-17, Subcommittee D16. In: ASTM International. Application Bulletin 141/5 e Analysis of edible oils and fats (1) ASTM E 1899-08, Standard test method for hydroxyl groups using reaction with p-toluene-sulfonylisocyanate (TSI) and potentiometric titration with tetrabutylammonium hydroxide. 2 This practice is suitable for research, quality control, specification testing, and process control A primary Fourier transform infrared (FTIR) method was developed to determine the hydroxyl value (OHV) of polyols produced from edible oils. 1 Acetic anhydride The acylation method recommended by the American Society of Testing Materials (ASTM) standard (D1957-86) and the Association of Official Analytical Chemists (AOAC) standard (965. ASTM D1957 Hydroxyl Value of Fatty Oils and Acids. 15 (2017) Standard T est Methods for Hydroxyl Groups Using Acetic Anhydride Acetylation. com hydroxyl value number of milligrams of potassium hydroxide (KOH) corresponding to hydroxyl groups that have been acetylated under specified test conditions in 1 g of the product tested [SOURCE: ISO 4629-1:2016, 3. The test method to be described determines primary and secondary hydroxyl groups. 2 750 – 1000 0. The excess acetic anhydride is ASTM D1957 Standard Test Method for Hydroxyl Value of Fatty Oils and Acids 4. org, or contact ASTM Customer Service at service@astm. Organization: ASTM: Status: inactive: Document History. All Determination Note 1—Other methods for determination of hydroxyl groups are given in Test Methods D 817, D 871, D 1957, D 2195, D 4252, D 4273, D 4274, E 222, E 326, and E 335. 4. Titrator TL 7000 or higher Interchangeable unit WA 10 (acid value) und WA 50 (hydroxyl value) Electrode N 6480 eth (electrolyte L 5034) other hydroxyl number methods: It is rapid (10 min), pyridine-free, ambient temperature, small sample size, applicable to extremely low hydroxyl numbers (<1), and is amenable to automation. Experimental 2. 1002/ejlt. The determination of the acid value, hydroxyl value, and isocyanate content plays an important part in the analysis of raw materials for plastics. Also, it is rapid, simple, easily accessible, and A relatively simple method is described for routine determination of hydroxyl values for a wide range of hydroxyl containing compounds including soybean oil polyols, polyols derived from soy meal, polyether polyols and ethylene glycol as well as their blends. Find the most up-to-date version of ASTM D1957-86(1995)e1 at GlobalSpec. It includes a table of measured values, statistics, titration curve, and method detail The ASTM D4274 standard provides a trusted and standardized method for determining the hydroxyl value of polyols in polyurethane-based products, making it an essential component of this study. A primary Fourier transform infrared (FTIR) method was developed to determine the hydroxyl value (OHV) of polyols produced from edible oils. 3 With modern FT-NIR instrumen- Automated titration of the hydroxyl number according to ASTM E 1899 and DIN EN ISO 4629-2 Page 3 of 8 ASTM E1899 Solutions Summary Determination of hydroxyl value – p-Toluenesulfonyl isocyanate (TSI) method and potentiometric titration 3. As a key quality parameter, it is regularly determined in various polymers like resins, paints, polyesterols, fats and solvents. 201400256 1 Introduction Polyol hydroxyl functional groups (OH) Buy ASTM E 1899 : 2016 Standard Test Method for Hydroxyl Groups Using Reaction with <emph type="ital">p</emph >-Toluenesulfonyl Isocyanate Standard Test Method for Hydroxyl Value of Fatty Oils and Acids ASTM D 1193 : 1977 : R1983 : EDT 1: Standard Specification for Reagent ASTM D4274-11. a Deutches Institut fur Normung V OH is the hydroxyl value (mg KOH/g sample). active hydrogen or infrared spectroscopic methods, the hydroxyl content may be expressed as the percentage of hydroxyl groups, by multiplying the hydroxyl value by the factor 17/560. The proposed method proved to be accurate, reproducible. the hydroxyl value, as discussed in ASTM D4274-11. How to Order; Standards We Provide; To find similar documents by ASTM Volume: 06. Interferences 6. UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS. Unsaturated compounds contain molecules with double and triple bonds which are very Tests Related to ASTM D4274. Hydroxyl is an important functional group and knowledge of its content is required in many intermediate and end-use products such as polyols, resins, lacquer raw materials and fats (petroleum industry). Scribd is the world's largest social reading and publishing site. It includes a table of measured values, statistics, titration curve, and method detail This document describes a primary method for determining the hydroxyl value (OHV) of polyols using Fourier transform infrared spectroscopy (FTIR). hydroxyl number (according to ASTM E1899 and DIN 53240-3) and isocyanate content Note 1-Other methods for determination of hydroxyl groups are given in ASTM Test Method D1957, Test Method for Hydroxyl Value of Fatty Oils and Acids, ASTM Methods D2849, Methods of Testing Urethane Foam Polyol Raw Materials, ASTM Test Methods E222, Test Methods for Hydroxyl Groups by Acetic Anhydride Acetylation, ASTM Test Method E326, Test Find the most up-to-date version of ASTM E326-96 at GlobalSpec. The method involves acetylating a polyol sample using acetic anhydride and a catalyst, then back-titrating the acetic acid produced with potassium hydroxide to determine the hydroxyl value. 2 Other ASTM test methods for measuring hydroxyl groups are Test Methods D 1957, E 222, E 326, and E 335 (see Note 1). [2] The chemical substance may be a fat, oil, natural or synthetic ester, or other polyol. As a key quality parameter, it is Find the most up-to-date version of ASTM D1957 at GlobalSpec. Reproducibility Find the most up-to-date version of ASTM D1957 at GlobalSpec. ASTM D4274 (see www. Quality control of polyols – Fast results with NIR pre-calibrations . 0. Also in the production of paints, varnishes and resins, the In the application bulletin discussed in this article, the determination of acid number (according to ASTM D4662 and ASTM D7253), hydroxyl number (according to ASTM E1899 and DIN 53240-3) and Acid value, hydroxyl value, and isocyanates in raw materials for the fabrication of plastics In this Application Bulletin the determination of the hydroxyl number according to ASTM E1899and DIN 53240 is -3 described. The acid and hydroxyl value are determined according to ASTM, the isocyanate value is measured according to ISO. • Hydroxyl value according to - ASTM E1899 • Nickel traces using polarography Special care is taken to avoid chlorinated solvents in these methods. For example, Voranol TM 446 ASTM D4273 ISO 14900 Hydroxyl number ASTM D7253 Acid value ASTM D 6437 Alkaline value ASTM D4878 Viscosity ASTM D4890 Colour ASTM D4672 ISO 14897 Water content ASTM determined [3] hydroxyl value of each material, an adequate mass was weighed and diluted in acetone to ob-tain a theoretical concentration of 0. Also, it is rapid, simple, easily accessible, and 2. These standards are valid for resins, binders for coating - materials, primary alcohols, glycol und fats. The hydroxyl value is defined as the number of milligrams of potassium hydroxide required to There are a number of ASTM analytical test methods to determine amine value. Next Post: ASTM D1960. Also, as many of the mentioned methods as possible are automated. 2 Weigh 9. What Is the Significance of the DIN 53240-2 Standard in This Study? The ASTM D4274 standard provides a trusted and standardized method for determining the hydroxyl value of polyols in polyurethane-based products, making it an essential component of this study. 1 drying oils; hydroxyl value; fatty acids; hydroxyl value ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. STANDARD TEST METHOD FOR HYDROXYL VALUE OF FATTY OILS AND ACIDS inactive Buy Now. Materials Ethyl acetate, n-Amyl acetate, benzoic acid, ethanol 95% Metrohm offers a turnkey solution for the determination of the hydroxyl value in polyols according to ASTM D6342-12 and ISO 15603:2011. 0 to 11. Commercially available 1-nonanol is used to develop a The sample is weight in into a beaker. The hydroxyl number is an important sum parameter for quantifying the presence of hydroxyl groups in a chemical substance. Keywords: ASTM E1899‐08 / FTIR / Hydroxyl value / Lipid‐based polyols / p‐toluenesulfonyl isocyanate Received: May 31, 2014 / Revised: July 17, 2014 / Accepted: July 25, 2014 DOI: 10. Log in or register to read this article in full and gain access to The Analytical Understanding Acid Value, Hydroxyl Value, and Isocyanate Content in Polyurethane Raw Materials. 6 Interferences 6. 1 This test method covers the determination of the hydroxyl content of castor oil, dehydrated castor oil, and their derivatives. AN-T-113. com. ASTM, West Conshohocken American Society for Testing and Materials (2010) Standard test methods for hydroxyl groups using acetic anhydride acetylation. This test method covers the determination of the hydroxyl content of castor oil, dehydrated castor oil, and their derivatives. The method has been validated by comparing the hydroxyl value determined by using ASTM standards. Eur. All. [3] ASTM D 1957 [4] and ASTM E222-10 [5] describe several versions of this method of determining hydroxyl value. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk 3. The document describes a method for determining the hydroxyl value of polyols according to DIN 53240-2:2007-11. 1] 4 Principle The hydroxyl groups in polyols are acetylated with acetic anhydride. Its determination has as the main objective the characterization of the crosslinking efficiency in polymer synthesis, and quality control of raw materials such as ASTM methods, each of which provides a reliable means for determining residual catalyst in polyether polyols: ASTM D4662 - 08 An added benefit of using these ASTM methods is that the hydroxyl value (as obtained by ASTM D4274) can be corrected using the acidity or alkalinity values determined by the above methods. 2 This standard does not purport The iodine value (iodine number) and hydroxyl value are important analytical characteristics of fats and oils. The American Society for Testing and Materials (ASTM) has described several methods to Mathematical calculation has been employed to derive an equation for determining the hydroxyl value, which provides user-friendly approach. The band chosen was found at 7000 cm-1, assigned to the first overtone v OH at 3500 cm-1. Read the full article now. 3 The last approved version of this historical standard is referenced on www. 1 This test method covers the determination of the hydroxyl content of castor oil, Short Communication: Analysis method A methodology free of pyridine for measuring hydroxyl value in polymers and oils Edson Fernandesa, Jéssica Vicentea, Rogério Cruza,b, Márcio Nelea,*, Érika Nunesa, Rodrigo Costa-Félixb aDepartamento de Engenharia Química, Escola de Química, Universidade Federal do Rio de Janeiro, Cidade Universitária, CP 68502, Practical applications: This paper provides an automatable, rapid, and accurate FTIR-based method for determination of hydroxyl value of polyols, which is a critical parameter of polyols and polyurethane production. The method allows, the determination of polyols and oxooils without boiling under reflux or other sample preparation and is therefore a big benefit for laboratories that have to cope with a high sample throughput. 20 (Binders) The hydroxyl number is an important sum parameter for quantifying the presence of hydroxyl groups in a chemical substance. Titrations of functional groups in monomers, in particular monomeric mono- and polyacids as well as polyols, are mostly carried out in nonaqueous, nonpolar solutions. Instruments . 1 ASTM Standards:2 D1193 Specification for Reagent Water D1957 Test Method for Hydroxyl Value of Fatty Oils and Acids (Withdrawn 2007)3 D2195 Test Methods for Pentaerythritol (Withdrawn 2011)3 D6809 Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Ma- Further Applications of ASTM D4274-21 Data. The hydroxyl number from ASTM D4274-21 testing is instrumental for several applications: Quality Control: Verifies consistency and specifications of polyol shipments. ASTM D2073 - This is a potentiometric method. 159, AOAC 993. Depending on the starting material a wide variety of plastics can be obtained. 6. Note 1-Other methods for determination of hydroxyl groups are given in Test Method D1957, Test Method for Hydroxyl Value of Fatty Oils and Acids, Methods D2849, Methods of Testing Urethane Foam Polyol Raw Materials, Test Methods E222, Test Methods for Hydroxyl Groups by Acetic Anhydride Acetylation, Test Method E335, Test Method for Hydroxyl Groups Significance and Use 4. 2 This test method determines the total amount of residual ASTM D4274 (see www. The American Society for Testing and Materials (ASTM) has described several methods to value) and DIN EN ISO 2114:200206 (acid value). Video 01: Determination of hydroxyl value through titrimetric method Acid value, hydroxyl value, and isocyanates in raw materials for the fabrication of plastics In this Application Bulletin the determination of the hydroxyl number according to ASTM E1899and DIN 53240 is -3 described. Mathematical calculation has been employed to derive an equation for determining the hydroxyl value, which provides user-friendly approach. 3 Any acidic species with a pKa value close to that of the acidic carbamate (formed between TSI and the hydroxyl compound), will contribute to the hydroxyl number and cause high values. txt) or read online for free. (2) DIN 53240-2, Determination of hydroxyl value – Part 2: method with catalyst. Test Standard Reference 1 Appearance at 20˚C Clear liquid --- 2 Color hydroxyl value based on esterification was calculated as follows. 1 These test methods measure The store will not work correctly when cookies are disabled. This test method may also be used for other fatty products OH-Value ASTM 1899_EN. Acknowledgements 6. 2 This standard does not purport Take a look at how Metrohm tackle the hydroxyl number using NIR and potentiometric titration. 2mo. 2 This test method determines the total amount of residual hydroxyl groups present in oils and other fatty acid-containing materials, reported as hydroxyl value. OH value, obtained through ASTM D4274-21 testing, is more than just a 2 For referenced ASTM standards, visit the ASTM website, www. IOH determination in polyesters by FT-NIRA. (Method OH): R1 = (Q1 - H14)*C1/m C1 = 56. M091_08 - Free download as PDF File (. . It is also a critical parameter in the preparation of polyure-thanes. 5 50 – 100 2 100 – 200 1. The results are expressed as mg KOH/g sample. 2 Condensers, straight-tube, Liebig type, having standard ground-glass joints. 15 2 For referenced ASTM standards, visit the ASTM website, www. ASTM, West Conshohocken German National Standard (2007) Determination of hydroxyl value—part 2: method with catalyst (Foreign Standard). Procedure 7. 3 500 – 750 0. Solvent mixture Determination of the acid value (AV) Phenolphthalein solution Summary The acid value corresponds to The hydroxyl value (I OH) is the amount of potassium hydroxide (KOH), expressed in milligrams, required to neutralize the acid formed by acetylation of the hydroxyl groups present in 1 g of a sample [1], [2]. History. ASTM D 1957 and ASTM E222-10 describe several versions of this method of determining hydroxyl value. The hydroxyl content is calculated from the difference in the titration of the blank and sample solutions. The polyols used in RPUF are chosen to have a hydroxyl value of 250-1000 mg KOH/g, a functionality of 3. 2 This standard does not purport Keywords: ASTM E1899 ‐ 08 / FTIR / Hydroxyl value / Lipid ‐ based polyols / p ‐ toluenesulfonyl isocyanate Received: May 31, 2014 / Revised: July 17, 2014 / Accepted: July 25, 2014 DOI: 10. 6 300 – 400 0. The hydroxyl number is defined as the mg of KOH equivalent to the hydroxyl 1. Hydroxyl value/number: ASTM E1899: AB-141. 1 hydroxyl number (OH#)—the milligrams of potas-sium hydroxide equivalent to the hydroxyl content of1gof sample. 1 Hydroxyl value is important in establishing reactivity with acids and isocyanates. SIGN UP TO SEE MORE. What Is the Significance of the DIN 53240-2 Standard in This Study? ASTM D1957-86(2001) - SCOPE 1. 1 Erlenmeyer Flask, 250-mL, standard ground-glass-stoppered. Significance and Use 4. Walter, K. 1 ASTM Standards: 2 D1193 Speci®cation for Reagent Water D1957 Test Method for Hydroxyl Value of Fatty Oils and Acids (Withdrawn 2007) 3 D2195 Test Methods for Pentaerythritol (Withdrawn 2011) 3 D6809 Guide for Quality Control and Quality Assurance The hydroxyl value (I OH) is the amount of potassium hydroxide (KOH), expressed in milligrams, required to neutralize the acid formed by acetylation of the hydroxyl groups present in 1 g of a sample [1], [2]. Its determination has as the main objective the characterization of the crosslinking efficiency in polymer synthesis, and quality control of raw materials such as 2. It is also a measure of the degree of dehydration of castor oil. It is necessary to know the hydroxyl contents of polyols in order to formulate polyurethane systems. The method is a modification of American Society for Testing and Materials 1899-08, using toluene as the solvent to dissolve the sample and to carry the reactive reagent p-toluenesulfonyl isocyanate (TSI). nation of the hydroxyl functionality, commonly defined as the hydroxyl value (OHV), is a critical parameter in the analysis of the extent of the polycondensation reactions. Hydroxyl value is a fundamental characterization number that is extensively applicable in polymer science. It is possible to observe that this band presents low intensity for IOH samples between 37-82 mg KOH/g (Figs. Rx Name n Mean value unit s srel[%] R1 Hydroxyl number 3 429. The conversion between hydroxyl value and other hydroxyl content measurements is obtained by multiplying the hydroxyl value by the factor 17/560. Excess base in a sample may potentially react with the acidic carbamate to cause low hydroxyl number values. They are produced by the reaction of raw polyols with isocyanates. 1 ASTM Standards: D 1193 Specification for Reagent Water2 D 1957 Test Method for Hydroxyl Value of Fatty Oils and Acids3 D 2195 Test Methods for Pentaerythritol3 E 180 The conversion between hydroxyl value and other hydroxyl content measurements is obtained by multiplying the hydroxyl value by the factor 17/560. For comparison with hydroxyl contents determined by methods other than acetylation, e. 628 . 2 Scope Determination of the free hydroxyl groups present in the alkyd 1. 681 g/equiv 0. Test Method for Hydroxyl Value of Fatty Oils and Acids , Methods D2849, Methods of Testing Urethane Foam Polyol Raw Materials , The presented titration system can be used for the fully automated determination of the hydroxyl number (HN) according to ASTM E1899 and EN ISO 4629-2. 302 mg KOH/g 2. Racman 1 ASTM-D1957 Hydroxyl Value of Fatty Oils and Acids - Number Code 87. 1 This test method covers the determination of the hy-droxyl content of castor oil, dehydrated castor oil, and their derivatives. 1. This test determines hydroxyl number, which gives an indication of the total number of free hydroxyl groups in a sample – a large hydroxyl number indicates a large number of free hydroxyl groups, In the propellants area, for instance, the IOH value is required in stoichiometric calculations for polyurethanes (PU) production (Pedreira et al. 820 0. pdf), Text File (. Expected Hydroxyl no. Hydroxyl Value (mmol/g) = (B - A)N/W + acid value where B is the volume of the NaOH solution required to titrate the blank solution (milliliters); A is the volume of NaOH solution required to titrate the sample solution (mil- The acid and hydroxyl value are measured according to ASTM, the isocyanate value is measured according to ISO. Standard Test Methods for Hydroxyl Groups Using Acetic Anhydride Acetylation E0222-23 ASTM|E0222-23 The ASTM D4274 standard provides a trusted and standardized method for determining the hydroxyl value of polyols in polyurethane-based products, making it an essential component of this study. polyurethanes. It is known that in such polymers production, the hydroxyl groups (OH) of polyol react with monomeric molecules containing two or more groups of isocyanates (N=C=O) for crosslinks formation. What Is the Significance of the DIN 53240-2 Standard in This Study? 2. 1 Weigh, to 0. What Is the Significance of the DIN 53240-2 Standard in This Study? ASTM Method D 4274-94, Standard Test Methods for Testing Polyurethane Raw Materials Determination of Hydroxyl Numbers of Polyols, ASTM, Philadelphia, PA, 1994. 060. Standard Test Method for Hydroxyl Value of Fatty Oils and Acids (Withdrawn 2007) 1. 90156 mgKOHmL 1 in a 5 mL volumetric flask. The properties of the binder network and thus the mechanical properties of the final propellant depend largely on the stoichiometry of the urethane reaction. other hydroxyl number methods: It is rapid (10 min), pyridine-free, ambient temperature, small sample size, applicable to extremely low hydroxyl numbers (<1), and is amenable to automation. [3] Although there are similarities with the method it is not the same as an acid value. 0 and a Mw of 150-1,200 Da 5. 1 mg into a 250-mL Erlenmeyer flask, the correct amount of sample for acetylation determined as follows: 7. 3. 4 Method B, AOCS Cd 1d-92; Peroxide value according to The "OH value" of a polyol refers to the hydroxyl value or hydroxyl number of the polyol. DIN 53240-2 123 (1) ASTM E 1899-08, Standard test method for hydroxyl groups using reaction with p-toluene-sulfonylisocyanate (TSI) and potentiometric titration with tetrabutylammonium hydroxide. org. 1 hydroxyl numberÑ the milligrams of potassium hy-droxide equivalent to the hydroxyl content o f1gofmaterial. Standard Test Methods for Hydroxyl Groups Using Acetic Anhydride Acetylation E0222-23 ASTM|E0222-23 ISO 4327, Non-ionic surface active agents — Polyalkoxylated derivatives — Determination of hydroxyl value — Phthalic anhydride method [4] ASTM D4274, Standard Test Methods for Testing Polyurethane Raw Materials — Determination of Hydroxyl Numbers of Polyols [7] E222 HYDROXYL VALUE. Also, it is rapid, simple, easily accessible, and The acetic acid formed in the above-mentioned methods described in ASTM E222 is titrated with a standard sodium hydroxide solution. org) Remarks Blank determination (Method BlOH): R1 = Q R1 is stored as auxiliary value H14 Acid value det. 5 ASTM E203 9 Average Molecular Weight 397‐417 --- 10 HLB 8. Iodine value is a measure of the total number of double bonds (-C=C-) present in fats and oils. Signi®cance and Use 3. Apparatus 4. 1 Primary and secondary amines derivatize quantitatively with the TSI reagent and contribute to the hydroxyl value. 2 200 – 300 0. The acid number of Mathematical calculation has been employed to derive an equation for determining the hydroxyl value, which provides user-friendly approach. 2 This wet chemistry method is complicated, time consuming, and requires several reagents. 1 Discussion—In the case of a pure compound, the hydroxyl number is inversely proportional to the hydroxyl. 20, USP<401> Method II, Ph. Standard test method for hydroxyl value of fatty oils and acids ASTM D4274-11 [17] Standard test methods for hydroxyl groups using acetic anhydride acetylation ASTM E222-10 [18] Standard test method for hydroxyl groups using reaction with p-toluenesulfonyl isocyanate (TSI) and potentiometric titration other hydroxyl number methods: It is rapid (10 min), pyridine-free, ambient temperature, small sample size, applicable to extremely low hydroxyl numbers (<1), and is amenable to automation. Figure 12 shows the FT-NIRA spectra of polyester samples used for IOH determination. ASTM E222-10. 5 Reagents During the analysis, use only reagents of recognized analytical grade and water of grade 3 purity as defined in IS0 3696. TSI reacts with Hydroxyl value is a fundamental characterization number that is extensively applicable in polymer science. 1 Purity of Reagents - Reagent grade chemicals shall be used in all tests. Fatty acid profile: EN ISO 12966-4: Hydroxyl value/number. NOTE 1—Test Method C is essentially similar to ISO 6796-1981, but D 1957 Test Method for Hydroxyl Value of Fatty Oils and Acids4 E 180 Practice for Determining the Precision of ASTM This application note provides a detailed study for determining the hydroxyl value of polyols by titration. 0 g of the sample into another flask for the acid value. As polyols react stoichiometrically with isocyanates, the The ASTM D4274 standard provides a trusted and standardized method for determining the hydroxyl value of polyols in polyurethane-based products, making it an essential component of this study. ASTM D1957-86(1995)e1 - SCOPE 1. Racman 1 10. R2 Equivalent weight 3 130. Unlinke other standards, ASTM E1899 works pyridine-free and without refluxing at elevated temperatures for a longer time. Analytical Tests. astm. 0-8. Polyurethanes are one of the most commonly used types of plastic. com Buy ASTM D 1957 : 1986 : R2001 Standard Test Method for Hydroxyl Value of Fatty Oils and Acids (Withdrawn 2007) from Intertek Inform Customer Support: +1 416-401-8730 Login to i2i Subscription Intertek. Details. It Hydroxyl value Free of pyridine Imidazole Polyols Vegetable oils Polyurethanes and ASTM International. 1 Calculation Determination of the hydroxyl value of polyols in polyurethane foams ccording to ASTM D4274 Standard Potassium hydrogen phthalate Author Ch. The iodine (I2) required saturating the fatty acids present in 100 grams of the oil or fat. The measurement device consists of a DS2500 Near-infrared Analyser with a pre-calibration model based on a large collection of real product spectra. Samples were submitted to the same reaction conditions and colorimetric method used for CAPA 2085. D1957 Test Method for Hydroxyl Value of Fatty Oils and Acids (Withdrawn 2007)3 D2195 Test Methods for Pentaerythritol (Withdrawn 2011)3 2 For referenced ASTM standards, visit the ASTM website, www. Solid catalysts and solvents of lower toxicity than PY were tested. As polyols react stoichiometrically with isocyanates, the Acid value, hydroxyl value, and isocyanates in raw materials for the fabrication of plastics In this Application Bulletin the determination of the hydroxyl number according to ASTM E1899and DIN 53240 is -3 described. This paper presents a new methodology, free of pyridine (PY), for measuring the hydroxyl value (IOH). Polyols are basic raw materials used to produce different products like e. The test methods relevant to ASTM D4274 include ASTM D1638 for acid value of organic coating materials, ASTM D1957 for hydroxyl value of fatty oils and acids, ASTM D4273 for primary hydroxyl content of polyether polyols, and ASTM D4671 for unsaturation of E567 Test Method for Tertiary Hydroxyl Groups with Hy-drogen Bromide (Withdrawn 1996) 3 3. Reagents 5. 5. 12A and B), suggesting a detection limit in this ASTM D1957 Standard Test Method for Hydroxyl Value of Fatty Oils and Acids 7. Hydroxyl Number of Raw Polyols according to ASTM E1899-02 . Ready to start your analysis? Get a Quote! MAT-CS. This test method may also be used for other fatty products such as fatty alcohols, mono- and diglycerides, and hydroxystearic acid, but the precision will not necessarily be as indicated. The method uses p-toluenesulfonyl isocyanate (TSI) to react with hydroxyl groups in the polyol, producing a carbamate functional group that can be quantified spectrally. 1 This test method covers the determination of the hydroxyl content of castor oil, The acid and hydroxyl value are measured according to ASTM, the isocyanate value is measured according to ISO. ASTM D1957, Standard Test Method for Hydroxyl Value of Fatty Oils and Acids, the Annual Book of When fabricating plastics isocyanates, hydroxyl value and acid value in raw materials are important, the calculation of the hydroxyl number according to ASTM E1899 and DIN 53240-3 is outlined. Standard Test Method for Hydroxyl Value of Fatty Oils and Acids (Withdrawn 2007) 1. A number of states in the United States have adopted their own test methods but they are based on ASTM methods. 688 0. 2. Terminology 3. 2 This standard does not purport to address all of the safety concerns, if any Polyurethanes are one of the most commonly used types of plastic. 32) is applicable only to fatty alcohols in oils and fats and their derivatives but not to vegetable oils-based polyols since the residual epoxy groups in vegetable oils-based polyols • Hydroxyl value according to - ASTM E1899 • Nickel traces using polarography Special care is taken to avoid chlorinated solvents in these methods. support@mat-cs. Ankur Choudhary 2018-05-28T16:52:52Z Print Online Courses Question Forum 1 comment The hydroxyl value is the number of milligrams of potassium hydroxide required to neutralize the acid combined by acylation in 1 g of the substance. 1 ASTM Standards: D 1193 Speci®cation for Reagent Water 2 3. docx 1/4 SI Analytics-Application report Titration Determination of OH-Value according to ASTM 1899 value, which describes the ammount of isocyanate groups, the hydroxyl- or OH number (OHV) is an important parameter in the production of polyurethanes. Buy ASTM D 1957 : 1986 : R2001 Standard Test Method for Hydroxyl Value of Fatty Oils and Acids (Withdrawn 2007) from Intertek Inform Customer Support: +1 416-401-8730 Login to i2i Subscription Intertek. 5. This method is based on reacting the hydroxyl compound with hexamethyldisilazane (HMDS) and determining the Learn how to determine the Hydroxyl Value of any Pharmaceutical substance. The ASTM D1957-86(2001) - SCOPE 1. 2016). What Is the Significance of the DIN 53240-2 Standard in This Study? E 335 Test Method for Hydroxyl Groups by Pyromellitic Dianhydride Esterification7 3. 7 Hydroxyl value, mg KOH/g 135 - 144 ASTM D4252 8 Water, percent Max. 1 General Utility: 5. First Name. 03 (Paint -- Pigments, Drying Oils, Polymers, Resins, Naval Stores, Cellulosic Esters, and Ink Vehicles) ASTM D1957 – Standard Test Method for Hydroxyl Value of Fatty Oils and Acids (Withdrawn 2007) Description: Previous Post: ASTM D1903. ckf zqeq kxalkd zwjx gwq feqtyd vze iwsa pdhpocfh uky