ASTM D2689-88 (1999) PDF

Full title and description

ASTM D2689-88 (Reapproved 1999) — Standard Practices for Testing Alkyd Resins. This practice compiles and describes the test methods most often used to characterize alkyd resins (particularly oil‑modified alkyds), including methods for nonvolatile content, acid value, unsaponifiable matter, fatty‑acid analysis, oil identification, phthalic/isophthalic acid determinations, and related physical and chemical tests. The document was reapproved in 1999 and subsequently withdrawn in 2008.

Abstract

ASTM D2689-88 (Reapproved 1999) is a practice intended as a reference for analysts and laboratories that test and classify alkyd resins. It lists and summarizes the significance, typical use, and interlaboratory‑tested methods for the common analyses used to characterize alkyd resins, and points users to the specific ASTM test methods for each measurement. The practice emphasizes oil‑modified alkyds and notes that adaptability to other alkyd types was not studied in the original interlaboratory work.

General information

• Status: Withdrawn (withdrawal effective February 11, 2008)
• Publication date: Reapproved/published in 1999 (effective date shown as May–October 1999; original approval May 27, 1988; current edition initially approved May 27, 1988)
• Publisher: ASTM International
• ICS / categories: 87.060.20 (Binders); Committee D01 — Paint and Related Coatings, Materials, and Applications; Subcommittee D01.33 — Polymers and Resins
• Edition / version: Designation D2689‑88 (Reapproved 1999)
• Number of pages: 3

Scope

The practice covers the test methods most often used to analyze and characterize alkyd resins (with emphasis on oil‑modified alkyds). It provides a consolidated table of referenced ASTM test methods for properties and compositional determinations (for example, nonvolatile content, acid value, unsaponifiable matter, fatty acid profile, identification of oils and oil acids, phthalic/isophthalic acid content, polyhydric alcohols, carboxylic acids, flash point, color, density, viscosity, and clarity). The practice is a guide and index to the specific methods rather than a stand‑alone test procedure for every measurement.

Key topics and requirements

• Compilation of referenced test methods commonly used for alkyd resin analysis (see list of referenced ASTM test methods).
• Recommendations on sample preparation and when multiple analyses may be conducted sequentially on the same starting specimen.
• Guidance on significance and use of each classification item — users are directed to the individual test methods for detailed procedures and acceptance criteria.
• Emphasis on interlaboratory‑tested methods for oil‑modified alkyds and note that adaptability to other alkyd types may be limited.
• Identification of “referee” or high‑precision procedures (for example, a foil or “nonvolatile” referee method for maximum precision in nonvolatile determinations).
• Reference list of specific ASTM test methods for compositional and physical property determinations (e.g., methods for fatty‑acid content, phthalic anhydride, isophthalic acid, polyhydric alcohols, oils identification, acid value, flash point, color, density, viscosity, clarity).

Typical use and users

Used as a reference index and procedural guide by analytical chemists, quality control laboratories, paint and coatings manufacturers, resin producers, research and development groups, and regulatory/inspection labs involved in formulation, specification, or failure analysis of alkyd‑based coatings and resins. It is intended for experienced analysts who will follow the individual referenced ASTM methods for test execution.

Related standards

The practice references and is intended to be used together with a number of ASTM test methods, including (but not limited to): D1259 (nonvolatile content), D1639 (acid value), D1397 (unsaponifiable matter), D1398 (fatty acid content), D2245 (identification of oils and oil acids), D563/D1306 (phthalic anhydride content), D2690 (isophthalic acid), D2998 (polyhydric alcohols), D2455 (identification of carboxylic acids), D93/D3278 (flash point methods), D1209/D1544 (color), D1475 (density), D1545 (viscosity), and D2090 (clarity). The practice has also been referenced by later specifications and standards covering related alkyd and oil‑modified coating products.

Keywords

alkyd resins, oil‑modified alkyds, resin testing, test practices, fatty acid analysis, phthalic anhydride, isophthalic acid, unsaponifiable matter, acid value, oil identification, ASTM D2689

FAQ

Q: What is this standard?

A: ASTM D2689‑88 (Reapproved 1999) is a practice that compiles and describes the common ASTM test methods used to analyze and classify alkyd resins. It serves as a reference guide pointing users to the specific test methods for each measurement.

Q: What does it cover?

A: It covers the scope, significance, and typical use of test methods for alkyd resins — including nonvolatile content, acid value, unsaponifiable matter, fatty acid content, identification of oils and oil acids, phthalic and isophthalic acid content, polyhydric alcohols, carboxylic acids, and common physical tests (color, density, viscosity, flash point, clarity). It is an index/practice rather than a detailed procedure for every test.

Q: Who typically uses it?

A: Analytical chemists, coatings and resin manufacturers, QC/QA laboratories, R&D teams, and testing laboratories that perform compositional and physical testing of alkyd resins and related coating materials.

Q: Is it current or superseded?

A: ASTM D2689‑88 (Reapproved 1999) was withdrawn; the withdrawal became effective February 11, 2008. Users should consult ASTM International or current ASTM documents for up‑to‑date practices and any replacement or newer specifications that cover alkyd resin testing.

Q: Is it part of a series?

A: The document is a practice under Committee D01 (Paint and Related Coatings, Materials, and Applications) and Subcommittee D01.33 (Polymers and Resins). It functions as a companion/reference practice linking to many individual ASTM test methods (a "family" of D‑series methods) rather than being one test in isolation.

Q: What are the key keywords?

A: Alkyd resins; oil‑modified alkyds; resin analysis; fatty‑acid content; phthalic anhydride; isophthalic acid; unsaponifiable matter; acid value; oil identification; ASTM practice.