ISO/TC 61/SC 12/WG 5 - Unsaturated polyesters, epoxy resins and other resins

This document specifies the continuous measurement method of shrinkage for thermosetting resin and/or UV curable resin.

This document specifies a method whereby the heat of reaction generated during epoxy resin crosslinking is measured by differential scanning calorimetry (DSC). The degree of crosslinking is determined based on this result. This method is applicable to epoxy resin systems with a moderate or slow crosslinking-reaction speed. It might not be applicable to systems with a fast crosslinking-reaction speed at ambient temperature.

ISO 20368:2017 specifies a method for determining the degree of crosslinking of crosslinked epoxy resins by the disappearance of the epoxy group during epoxy resin crosslinking measured by Fourier Transform Infrared (FTIR) (with a transmittance mode) spectroscopy.

ISO 4895:2014 specifies a method for determining the tendency of liquid epoxy resins to crystallize. The tendency to crystallize is determined by observing, at specified time intervals, changes in fluidity and the onset of crystallization.

ISO 21048:2014 specifies a method for the determination of the 1,2-glycol content in epoxy resins.

ISO 3673-2:2012 specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of crosslinked epoxy resins. The properties determined have been selected from the general test methods in ISO 10350‑1:2007. Test methods for the determination of the properties of non-crosslinked epoxy resins are not included in this part of ISO 3673. NOTE Test methods for non-crosslinked epoxy resins are specified in ISO 18280.

ISO 4901:2011 specifies a method for the determination, by gas chromatography, of the residual styrene monomer in reinforced plastics based on unsaturated polyester (UP) resins in the polymerized state. The residual styrene monomer content is an important criterion in evaluating the degree of cure of UP resins in the polymerized state. The method can also be used for the simultaneous determination of other volatile aromatic hydrocarbons in UP resins. The method is not applicable to UP resins of high chemical resistance.

ISO 18280:2010 provides an overview of the ISO test methods used to characterize epoxy resins.

ISO 21627-2:2009 specifies a method for the determination of easily saponifiable chlorine in epoxy resins. The easily saponifiable chlorine content is the quantity of easily saponifiable chlorine in a given quantity of epoxy resin. The values obtained are indicative of the concentration of easily saponifiable chlorine in chlorohydrin groups in the resin.

ISO 21627-3:2009 specifies a method for the determination of the total amount of chlorine in epoxy resins. The chlorine measured by this method, referred to as total chlorine, includes saponifiable organic chlorine and inorganic chlorine.

ISO 21627-1:2009 specifies a direct potentiometric method for the determination of inorganic chlorine in epoxy resins, also called “ionic chlorine”. The inorganic chlorine content is expressed in milligrams per kilogram of epoxy resin.

ISO 21318:2007 specifies a method for the determination of the electrical conductivity of an aqueous extract obtained by extraction of an epoxy resin with water at 95 °C. The method is applicable only to epoxy resins that are in the molten state at the extraction temperature (95 °C). The method is important for epoxy resins which are used as insulation materials for electronic devices. The electrical conductivity of the extract is used as a measure of the concentration of the ionic species in the resin.

ISO 4597-1:2005 specifies a method of designation for epoxy resin hardeners and accelerators. The object of the designation method is to allocate to each commercial product a group of digits, called the 'designation', giving in a coded form certain information on the product: chemical base, modifiers and solvents, viscosity and additives. Thus all products having similar properties and therefore likely to have the same uses will have the same designation, so aiding users in their choice if producers list the designation in their data sheets.

This International Standard specifies methods of measuring, under defined conditions, the gel time at ambient temperature (i.e. within the range 18 °C to 30 °C) of unsaturated-polyester resins. The referee temperature, if needed, is 25 °C.

This International Standard specifies a method for the determination of the epoxy equivalent and is applicable to all epoxy compounds. In the case of epoxyamines, it is necessary to apply the modification specified in annex A.

Describes a method for the determination of the overall volume shrinkage of unsaturated polyester and epoxsy resins. Replaces the first edition.

Contains a method of designation for epoxy resins. The objective of this method is to allocate to each commercial product a group of digits, giving in a coded form certain information on the product such as chemical base, main properties and the nature of modifiers, solvents or additives. Replaces the first edition.

Specifies a method for the determination of the primary, secondary and tertiary amine group nitrogen content of aliphatic or aromatic amine hardeners for epoxy resins.

The principle of the method specified is reacting a small amount of free acid present in a test portion of acid anhydride hardener or accelerator with rhodamine 6G to colour the test solution pink, measuring the absorbance of the coloured solution at a wavelength of about 510 nm using a spectrometer, determining the free-acid content from a calibration curve. The method is suitable for most anhydrides except for polyester and oligomeric anhydrides which may give too wide a scatter of results.

Specifies a method for the determination of the reactivity of unsaturated polyester resins as characterized by the maximum temperature reached when heated with catalyst in a water-bath at 80 °C and by the time taken for the temperatur of the mixture to rise from 65 °C to this maximum temperature. As the test results depend very much on the conditions under which the test is carried out, these conditions are described in detail.

Specification of two methods for the determination of chlorine: Oxidation of the test portion with sodium peroxide (method A) in a Parr bomb or with gaseous oxygen (method B) in a flask, followed by electrometric or volumetric titration of the resulting chlorides. Blank tests shall be carried out by using the same quanities of reagents as in the determination.

ISO 3673-2:2007 specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of epoxy resins. Requirements for handling test material and for conditioning both the test material before moulding and the specimens before testing are given. Properties of crosslinked epoxy resins have been selected from the general test methods in ISO 10350‑1:1998. Other test methods in wide use with, or of particular significance to, epoxy resins, particularly properties useful for the processing of non-crosslinked epoxy resins, are also included.

ISO 18280:2005 provides an overview of the ISO test methods used to characterize epoxy resins.

ISO 21048:2004 specifies a method for the determination of the 1,2-glycol content in epoxy resins.

ISO 21627-3 specifies a method for the determination of the total chlorine contained in epoxy resins. The amount of chlorine measured by this method, referred to as total chlorine, includes saponifiable organic chlorine and inorganic chlorine.

ISO 21627-2 specifies a method for the determination of easily saponifiable chlorine in epoxy resins. The values obtained are indicative of the concentration of easily saponifiable chlorine of chlorohydrin groups in the compounds. The easily saponifiable chlorine content is the quantity of easily saponifiable chlorine in a given quantity of epoxy resin.

ISO 21627 specifies a direct potentiometric method for the determination of inorganic chlorine in epoxy resins, also called ionic chlorine. The inorganic chlorine content is expressed in milligrams per kilogram of epoxy resin.

Gives a method for the determination of the total saponifiable chlorine contained in epoxy resins and related materials. The amount of chlorine measured by the method includes saponifiable organic chlorine and inorganic chlorine.

The principle of the method is preparing a cyclohexane solution of the sample to be analyzed, measuring the absorbance for the 810 cm^-1 and 782 cm^-1 bands which are characteristic of the 1,2,4- and 1,2,6-positions on the aromatic ring, and calculating the absorbance ratio. Applies to mixtures containing 5 % to 95 % of the 2,4-isomer.

The residual styrene monomer content in reinforced plastics based on unsaturated polyester (UP) resins is an important criterion in evaluating the degree of cure of UP resins in the polymerized state. The determination is carried out by extraction of the residual monomer styrene from the UP resin in the polymerized state using dichloromethane and subsequent gaschromatographic analysis of the extract with n-butyl-benzene as internal standard. An alternative method of determining the residual styrene monomer by the Wijs method is also specified.