introduction
ISO (International Organization for Standardization) is a global federation of national standards bodies (ISO member bodies). The development of international standards is usually carried out through ISO technical committees. Each member group interested in a subject for which a technical committee has been established has the right to be represented on the Committee. International organizations, governments and non-governmental organizations in contact with ISO are also involved in this work. ISO works closely with the International Electrotechnical Commission (IEC) on all matters of electrical standardization.

International standards are drafted in accordance with the rules given in Part 2 of the ISO/IEC Directive.

The main task of the technical committee is to develop international standards. The draft international standard adopted by the Technical Committee will be circulated to the member bodies for voting. Publication as an international standard requires approval by a vote of at least 75% of the member bodies.

ISO 18280-2010 “Plastic epoxy resin test methods”

Please note that some elements of this document may be the subject of patent rights. ISO is not responsible for identifying any or all such patents.

ISO 18280 was developed by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12, Thermosetting Materials.

The second edition cancels and replaces the first edition (ISO 18280:2005), which was revised to include the following additional test methods:

– Determination of softening point (see 3.1.2);

– Determination of the content of 1, 2-glycol (see 3.2.3);

– Determination of the conductivity of aqueous resin extracts (see 3.2.4).

introduce
The purpose of this international standard is to outline the ISO test methods used to characterize epoxy resins. Appropriate and necessary test methods for the characterization of epoxy resins prior to polymerization are listed, along with a brief description of the principles involved.

ISO 18280-2010 “Plastic epoxy resin test methods”

Due to the particularity of thermosetting resins such as epoxy resins, the performance of pre-crosslinking (useful characteristics for processing) and post-crosslinking (inherent characteristics) is different. ISO 3673-2 gives a procedure for determining the inherent properties of crosslinked (or cured) epoxy resins.

1 Scope of Application
Epoxy resins are a class of synthetic resins that include products ranging from viscous liquids to high melting point solids. Resin molecules contain one or more ethylene oxide or epoxy groups as reaction sites, usually in the form of glycidyl. The commercially important resin is the glycidyl ether of bisphenol A, made from the condensation of epichlorohydrin and diphenylpropane (bisphenol A). Epoxy resins with different properties can also be commercially produced by reacting epichlorohydrin with other materials. In order to be used, the resin needs to be cross-linked with a hardener or hardener. The choice of curing agent is very important in designing an epoxy resin system for a given application. The main reactive groups in the resin, the epoxy and hydroxyl groups, react with many other groups, so a variety of chemicals can be used as curing agents. These include anhydrides, aliphatic and aromatic amines, and polyamides. Some curing agents cross-link the resin at ambient temperatures, while others require heat.

This international standard Outlines ISO test methods for characterizing epoxy resins. The listed attributes to be determined in any given case depend on the agreement between the supplier and the customer.

ISO 18280-2010 “Plastic epoxy resin test methods”

2 Normative reference documents
The following reference files are required for the application of this document. For dated references, only the cited version applies. For undated citations, a new version of the referenced document (including any revisions) applies.

ISO 1523, Determination of flash point – closed cup equilibrium method

ISO 1675, Plastics-liquid resins – Determination of density by pycnometer method

ISO 2555, plastics – liquid resins or emulsions or dispersions – Determination of apparent viscosity by the Brinell test method

ISO 2592, determination of flash point and ignition point – Cleveland open-cup method

ISO 3001, plastics – epoxy compounds – determination of epoxy equivalent

ISO 3146:2000, Plastics – Determination of the melting behaviour of semi-crystalline polymers by capillary and polarizing microscopy (melting temperature or melting range)

ISO 3219, Plastics – polymers/resins in liquids or emulsions or dispersions – Determination of viscosity using a rotary viscometer with a specified shear rate

ISO 3251, Paints, varnishes and plastics – Determination of the content of non-volatile substances

ISO 18280-2010 “Plastic epoxy resin test methods”

ISO 3451-1:2008, plastics – Determination of ash – Part 1: General method

ISO 3521, plastics – unsaturated polyesters and epoxy resins – determination of total volume shrinkage

ISO 3675, crude oil and liquid petroleum products – Laboratory determination of density – hydrometer method

ISO 4615:1979 Plastics – unsaturated polyesters and epoxy resins – Determination of total chlorine content

ISO 4625-1 Adhesives for paints and varnishes – Determination of softening point – Part 1: Global method

ISO 4630-1, transparent liquids – Estimation of colour by the Gardner colour scale – Part 1: visual method

ISO 18280-2010 “Plastic epoxy resin test methods”

ISO 4895, plastics – liquid epoxy resins – determination of crystallization tendency

ISO 5661, petroleum products – hydrocarbon liquids – Determination of refractive index

ISO 6271-1, transparent liquids – Assessment of colour by the platinum-cobalt scale – Part 1: visual method

ISO 7327, plastics – hardeners and promoters of epoxy resins – Determination of free acids in anhydrides

ISO 9702, plastics – amine epoxy hardeners – Determination of primary amine, secondary amine and tertiary amine nitrogen content

ISO 11357-3 Plastics – Differential scanning calorimetry (DSC) – Part 3: Determination of melting and crystallization temperature and enthalpy

ISO 12058-1, plastics – Determination of viscosity using a falling ball viscometer – Part 1: inclined tube method

ISO 21048, Determination of plastic-epoxy resin-1, 2-ethylene glycol content

ISO 21318, plastics – epoxy resins – Determination of electrical conductivity of water-based resin extracts

ISO 18280-2010 “Plastic epoxy resin test methods”

ISO 21627-1, plastics – epoxy resins – Determination of chlorine content – Part 1. Inorganic chlorine

ISO 21627-2, plastics – epoxy resins – Determination of chlorine content – Part 2: easily saponifiable chlorine

ISO 21627-3, plastics – epoxy resins – Determination of chlorine content – Part 3: Total chlorine

ISO 18280-2010 “Plastic epoxy resin test methods”

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