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ASTM D3643-15(2022)

(Test Method)

Standard Test Method for Acid Number of Certain Alkali-Soluble Resins

Standard Test Method for Acid Number of Certain Alkali-Soluble Resins

SIGNIFICANCE AND USE
4.1 This test method is not appropriate for alkali-soluble resins whose acid functionality is due to incorporated anhydrides. Variations in manufacture, storage, and possible contamination of anhydride functional resins may cause partial hydrolysis, or esterification, which will invalidate data from this test method. Anhydride functional resins should be characterized by Test Method D3644.  
4.2 This test method is used to measure a property of acid functionalized resins. Acid number determines the utility of resins as well as being a significant quality control measure.
SCOPE
1.1 This test method covers the measurement of the free acidity present in certain alkali-soluble resins.  
1.2 This test method is not suitable for styrene-maleic anhydride resins.  
1.3 The resin manufacturer should specify whether or not this test method may be used for his product(s).  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
30-Nov-2022
ICS
83.080.10 - Thermosetting materials
Technical Committee
D21 - Polishes
Drafting Committee
D21.02 - Raw Materials
Current Stage
Ref Project

Relations

Refers
ASTM D3644-06(2012) - Standard Test Method for Acid Number of Styrene-Maleic Anhydride Resins
Effective Date
01-Oct-2012
Refers
ASTM D3644-06 - Standard Test Method for Acid Number of Styrene-Maleic Anhydride Resins
Effective Date
01-Jun-2006
Refers
ASTM D1152-06 - Standard Specification for Methanol (Methyl Alcohol)
Effective Date
01-Apr-2006
Refers
ASTM D1193-06 - Standard Specification for Reagent Water
Effective Date
01-Mar-2006
Refers
ASTM D3644-98(2004) - Standard Test Method for Acid Number of Styrene-Maleic Anhydride Resins
Effective Date
01-Sep-2004
Refers
ASTM D1193-99e1 - Standard Specification for Reagent Water
Effective Date
10-Feb-1999
Refers
ASTM D1193-99 - Standard Specification for Reagent Water
Effective Date
10-Feb-1999
Refers
ASTM D3644-98 - Standard Test Method for Acid Number of Styrene-Maleic Anhydride Resins
Effective Date
10-Sep-1998
Refers
ASTM D1152-97(2001) - Standard Specification for Methanol (Methyl Alcohol)
Effective Date
10-Dec-1997

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ASTM D3643-15(2022) - Standard Test Method for Acid Number of Certain Alkali-Soluble ResinsASTM D3643-15(2022) - Standard Test Method for Acid Number of Certain Alkali-Soluble Resins
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ASTM D3643-15(2022) - Standard Test Method for Acid Number of Certain Alkali-Soluble Resins
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D3643 − 15 (Reapproved 2022)
Standard Test Method for
Acid Number of Certain Alkali-Soluble Resins
This standard is issued under the fixed designation D3643; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 This test method covers the measurement of the free 3.1 Definitions:
acidity present in certain alkali-soluble resins. 3.1.1 acid number—the number of milligrams of potassium
hydroxide (KOH) required to neutralize the alkali-reactive
1.2 This test method is not suitable for styrene-maleic
groups in1gof material under the conditions of test.
anhydride resins.
1.3 The resin manufacturer should specify whether or not 4. Significance and Use
this test method may be used for his product(s).
4.1 This test method is not appropriate for alkali-soluble
1.4 The values stated in SI units are to be regarded as resins whose acid functionality is due to incorporated anhy-
standard. No other units of measurement are included in this drides. Variations in manufacture, storage, and possible con-
standard. tamination of anhydride functional resins may cause partial
hydrolysis, or esterification, which will invalidate data from
1.5 This standard does not purport to address all of the
this test method. Anhydride functional resins should be char-
safety concerns, if any, associated with its use. It is the
acterized by Test Method D3644.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
4.2 This test method is used to measure a property of acid
mine the applicability of regulatory limitations prior to use.
functionalized resins. Acid number determines the utility of
1.6 This international standard was developed in accor-
resins as well as being a significant quality control measure.
dance with internationally recognized principles on standard-
5. Reagents and Materials
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
5.1 Purity of Reagents—Reagent grade chemicals shall be
mendations issued by the World Trade Organization Technical
used in all tests. Unless otherwise indicated, it is intended that
Barriers to Trade (TBT) Committee.
all reagents shall conform to the specifications of the Commit-
tee onAnalytical Reagents of theAmerican Chemical Society,
2. Referenced Documents
where such specifications are available.
2.1 ASTM Standards:
5.2 Purity of Water—Unless otherwise indicated, references
D362 SpecificationforIndustrialGradeToluene(Withdrawn
to water shall be understood to mean reagent water conforming
1989)
to Specification D1193.
D1152 Specification for Methanol (Methyl Alcohol) (With-
5.3 Neutral Solvent Mixture—Mix equal parts of denatured
drawn 2021)
alcohol and industrial toluene conforming respectively to the
D1193 Specification for Reagent Water
requirements described for SDA. 3A (200 proof) and Specifi-
D3644 Test Method for Acid Number of Styrene-Maleic
cation D362. Neutralize the mixture using 0.1 N KOH solution
Anhydride Resins
and phenolphthalein indicator solution, until the faint pink
color persists for 1 min.
5.4 Phenolphthalein Indicator Solution (10 g/L)—Dissolve
ThistestmethodisunderthejurisdictionofASTMCommitteeD21onPolishes
1.0 g of phenolphthalein in 100 mLof denatured alcohol (SDA
and is the direct responsibility of Subcommittee D21.02 on Raw Materials.
3A, 200 proof).
Current edition approved Dec. 1, 2022. Published December 2022. Originally
approved in 1978. Last previous edition approved in 2015 as D3643 – 15. DOI:
10.1520/D3643-15R22.
2 4
For referen
...

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ASTM D3644-15(2022)(Test Method)
Standard Test Method for Acid Number of Styrene-Maleic Anhydride Resins

SIGNIFICANCE AND USE
4.1 This test method is used to determine the property of styrene-maleic anhydride resins functionality. Acid functionality determines the utility of resin as well as being a significant quality control test.  
4.2 Because some of the anhydride functionality has been hydrolyzed in the manufacturing process, direct titration with base will produce erroneous data on the total acid content of the fully hydrolyzed resin in use. This test method charges excess alkali to hydrolize the anhydride functionality and neutralize the resulting acid. The remaining unreacted alkali is then back titrated with a standardized acid solution and the acid content is determined by difference.
SCOPE
1.1 This test method covers the measurement of the free acidity present in styrene-maleic anhydride resins.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
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SIGNIFICANCE AND USE
4.1 In general, with materials of this type, softening does not take place at a definite temperature. As the temperature rises, these materials gradually and imperceptibly change from brittle solids to soft, viscous liquids. For this reason, the determination of the softening point must be made by a fixed, arbitrary, and closely defined methods if the results are to be comparable.
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1.1 This test method covers the determination of the softening point of certain alkali-soluble resins having uniform plastic flow characteristics as the melting point is approached.  
1.2 The resin manufacturer should specify whether or not this test method may be used for his product(s).  
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ASTM D3837-95(2019)(Practice)
Standard Practice for Preparing a Solution of Alkali–Soluble Resins

SIGNIFICANCE AND USE
4.1 This practice is suitable for all types of akalali-soluble resins. The resin manufacturer shall specify the percent ammonium hydroxide to be used (based on the equivalent weight of resin) and the maximum temperature to be used to achieve solution.
SCOPE
1.1 This practice is a procedure for preparing solutions of alkali-soluble resins in aqueous ammonia and determining the characteristics of such solutions.  
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5.1 General Utility:  
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5.2.3 The estimation of precision in this practice is based on typical formulations for rigid and flexible foams. Formulations with faster reaction times will likely have greater variability, particularly cream time (initiation time). Formulations with slower reaction times will likely have greater variability in the measurement of free rise time.  
5.2.4 It is possible that low-level (ppm, ppb) ingredient contamination will not be detectable using this practice. Confirmation of such contamination will potentially require large-scale (~20 L) tests and is out of the scope of this practice.
SCOPE
1.1 This practice covers the determination of cream time (initiation time), top of cup time, free rise time, free rise height, string gel time (pull time), tack free time, settle back, and free rise density of polyurethane foam formulations using a cup foam test.  
1.2 Typical definitions, terms, and techniques are described; including procedures for mixing and transferring samples to the foaming container; and data gathering and evaluation. However, agreement between the customer and the testing laboratory for all these items must be obtained prior to use.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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ASTM D4895-18(2023)(Specification)
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ABSTRACT
This specification covers dry-powder resins of polytetrafluoroethylene (PTFE) resin produced from dispersion. PTFE mixtures with additives are not covered in this specification. This specification covers type I and type II PTFE. The resins shall be tested for bulk density, particle size, water content, melting peak temperature, tensile strength, elongation at break, standard specific gravity, extrusion pressure, thermal instability index, and stretching void index. Specimen preparation, testing, inspection, and packaging shall be in accordance to the procedures indicated in this specification.
SCOPE
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ASTM D7750-23(Test Method)
Standard Test Method for Cure Behavior of Thermosetting Resins by Dynamic Mechanical Procedures using an Encapsulated Specimen Rheometer

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5.1 This method provides a simple means of characterizing the cure behavior of a thermosetting resin specimen that is a representation of a composite part. The diameter of the specimen is approximately 38 mm and the thickness ranges from 2.6 mm to 3.2 mm. This corresponds to a sample volume of approximately 3 cm3 to 4 cm3. The data may be used for quality control, research and development, and verifying the cure within processing equipment including autoclaves.  
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1.1 This method covers the use of dynamic mechanical instrumentation for determination and reporting of the thermal advancement of cure behavior of thermosetting resin on an inert filler or fiber in a laboratory. It may also be used for determining the cure properties of resins without fillers or fibers. These encapsulated specimens are deformed in torsional shear using dynamic mechanical methods.  
1.2 This method is intended to provide means for determining the cure behavior of thermosetting resins on fibers over a range of temperatures from room temperature to 250 °C by forced-constant amplitude techniques (in accordance with Practice D4065). Plots of complex modulus, complex viscosity, and damping ratio or tan delta as a function of time or temperature, or both, quantify the thermal advancement or cure characteristics of a resin or a resin on filler or fiber.  
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1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4.1 Exception—The Fahrenheit temperature measurement in 10.1 is provided for information only and is not considered standard.  
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ASTM D5629-23(Test Method)
Standard Test Method for Polyurethane Raw Materials: Determination of Acidity in Low-Acidity Aromatic Isocyanates and Polyurethane Prepolymers

SIGNIFICANCE AND USE
5.1 This test method is suitable for research or for quality control to characterize aromatic isocyanates and low-acidity prepolymers. Acidity correlates with performance in some polyurethane systems.
SCOPE
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1.2 The values stated in SI units are to be regarded as the standard.  
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: This standard is equivalent to ISO 14898, Method B.  
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Standard Test Methods for Polyurethane Raw Materials: Determination of Total Chlorine in Isocyanates

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5.1 These test methods are suitable for use for research or for quality control to determine the total chlorine content of aromatic isocyanates. In some instances total chlorine content may correlate with performance in polyurethane systems.
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