What is ISO 2114:2000 Plastics (polyester resins) and paints and varnishes (binders) — Determination of partial acid value and total acid value?
ISO 2114:2000 standard specifies a method for the determination of partial acid value and total acid value of polyester resins used in plastics, as well as binders used in paints and varnishes.
The partial acid value is a measure of the amount of acidic functional groups present in the resin or binder, while the total acid value is the sum of all the acidic functional groups present, both free and combined. The acid value is an important parameter in determining the quality of these materials as it affects their processing and performance properties.
The method described in ISO 2114 involves the saponification of the sample with a known amount of potassium hydroxide solution, followed by titration of the excess alkali with hydrochloric acid solution using a suitable indicator.
The difference between the amount of potassium hydroxide solution used and the amount of hydrochloric acid solution used gives the partial acid value, while the total acid value is determined by titrating the sample directly with hydrochloric acid solution.
In addition, It is applicable to polyester resins and binders that have an acid value of less than 200 mg KOH/g. It is useful for manufacturers of these materials. As well as quality control and testing laboratories that need to determine the acid value of polyester resins and binders.
Requirements of ISO 2114
ISO 2114 specifies the requirements for the determination of partial acid value and total acid value of polyester resins and binders used in paints and varnishes. The standard specifies the following:
Sampling: The sample should be representative of the product being tested and should be taken in accordance with the appropriate sampling method.
Apparatus: The standard describes the apparatus required to carry out the test. Including burettes, pipettes, flasks, and a titration apparatus.
Reagents: The standard specifies the reagents required for the test. Including solvents, indicator solutions, and titrants.
Procedure: The standard describes the procedure for the determination of partial acid value and total acid value. Thus, This involves dissolving a sample of the binder in a solvent, titrating the resulting solution with a standardized base solution. Also, calculating the acid value.
Also, Calculation of results: The standard specifies the method for calculating the partial acid value and total acid value based on the volume of base solution used in the titration.
Therefore, ISO 2114:2000 provides a detailed procedure for the determination of partial acid value and total acid value of polyester resins and binders used in paints and varnishes. Including requirements for sampling, apparatus, reagents, and calculation of results.
Benefits of ISO 2114:2000
ISO 2114:2000 provides a standardized method for the determination of partial acid value and total acid value of polyester resins and binders used in paints and varnishes. The benefits of this standard include:
Consistency: The standard ensures consistency and reproducibility of acid value measurements. Providing a common language and framework for the determination of these values.
Quality control: The method described in ISO 2114 is useful for quality control purposes. Helping manufacturers to ensure that their products meet the required specifications for acid value.
Performance evaluation: Acid value is an important parameter that affects the processing and performance properties of these materials. The method in ISO 2114:2000 can be used to evaluate the impact of changes in the production process or raw materials on acid value. And subsequently, the performance of the final product.
Finally, Regulatory compliance: Many industries, such as the paint and varnish industry, have regulations that require the determination of acid value. ISO 2114 provides a standardized method that meets these regulatory requirements.
Who needs ISO 2114:2000?
ISO 2114:2000 is primarily intended for use by manufacturers and users of polyester resins and binders used in paints and varnishes. Moreover, This standard provides a standardized method for the determination of partial acid value and total acid value of these materials. Which can be used to assess their quality and suitability for specific applications.
The standard may also be of interest to testing laboratories, regulatory authorities, and other organizations involved in the assessment of polyester resins and binders used in paints and varnishes.
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Read About : ISO 2113:1996
