ISO 2114:2000

Name: ISO 2114:2000 — Plastics (polyester resins) and paints and varnishes (binders) — Determination of partial acid value and total acid value
SKU: ISO 2114:2000
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Plastics (polyester resins) and paints and varnishes (binders) — Determination of partial acid value and total acid value

Название (английский):

ISO 2114:2000

Plastics (polyester resins) and paints and varnishes (binders) — Determination of partial acid value and total acid value

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 10
Дата публикации:: 24 августа 2000 г.
Издание:: ISO IS 2114 edition 3 version 1
ICS:: 83.080.10

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Описание (английский):

La présente Norme internationale spécifie des méthodes de détermination de l'indice d'acide partiel (méthode A) et/ou l'indice d'acide total (méthode B) des résines de polyesters et des liants pour peintures et vernis. Elle n'est pas applicable aux résines phénoliques. Elle est destinée à fournir des données, tant dans le domaine du contrôle qualité pour l'acceptation ou rejet de tels produits, (domaines de tolérances en fonction des spécifications), qu'en contrôle ou en recherche-développement pour suivre l'achèvement de la réaction de polycondensation de la résine.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 2114:2000 specifies standardized laboratory methods to determine the partial acid value (PAV) and total acid value (TAV) of polyester resins and binders for paints and varnishes. The methods provide reproducible titrimetric procedures (potentiometric or colorimetric) to quantify milligrams of KOH required to neutralize acidic groups in a resin sample. ISO 2114 is intended for quality control, acceptance testing and monitoring of polycondensation reactions; it is not applicable to phenolic resins.

Key topics and technical requirements

Two methods:

Method A (Partial acid value) - dissolves a weighed resin portion in a toluene/ethanol solvent mixture and titrates (potentiometrically recommended) with standard KOH in ethanol or methanol to determine acid groups excluding hydrolyzable anhydrides.
Method B (Total acid value) - dissolves resin in a pyridine / methyl ethyl ketone / water solvent, allows hydrolysis of anhydrides (20 min), then titrates to determine all carboxyl and hydrolysed anhydride acidities.

Titrant and reagents:

Standard 0.1 mol/L KOH in ethanol or methanol (check concentration before use; 0.5 mol/L recommended if >25 mL titrant expected).
Solvent compositions and purity limits are specified (e.g., anhydrous ethanol, toluene, pyridine - note pyridine is toxic and requires ventilation and PPE).
Optional color indicators: phenolphthalein and bromothymol blue; potentiometric end-point detection is preferred.

Apparatus and procedure:

Analytical balance (±1 mg), burette, magnetic stirrer, potentiometric titration system with suitable electrodes.
Duplicate determinations; blank corrections; sample mass chosen according to expected acid value (guidance provided).

Results and calculations:

Results expressed as mg KOH per g of resin (PAV or TAV).
Option to report values for the solid resin using non-volatile-matter correction per ISO 3251.
Reporting rules include repeat criteria (e.g., replicate agreement thresholds).

Applications and users

Primary users:

Quality-control laboratories in paint, varnish and resin manufacturing
R&D teams monitoring polycondensation or resin synthesis
Third-party testing and certification bodies

Practical uses:

Acceptance testing against product specifications
Monitoring reaction completion and free acid/anhydride content
Ensuring batch-to-batch consistency and regulatory compliance

Related standards

ISO 3251 - determination of non-volatile matter (used for reporting acid values on solid resin)

ISO 3696 - laboratory water quality

ISO 385-1 - burette requirements

ISO 6353-2 - reagent specifications

Keywords: ISO 2114, acid value, partial acid value, total acid value, polyester resins, paints and varnishes, titration, KOH, potentiometric titration, quality control.

ISO 2114:2000

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

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BS EN ISO 3696:1995

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ISO 3851:1977

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ISO 6353-2:1983

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