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ISO 4901:2011

Reinforced plastics based on unsaturated-polyester resins — Determination of the residual styrene monomer content, as well as the content of other volatile aromatic hydrocarbons, by gas chromatography

Publication date:   Aug 9, 2011

General information

90.20   Standard under periodical review   Jul 15, 2026

ISO

ISO/TC 61/SC 12 Thermosetting materials

International Standard

83.120   Reinforced plastics

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 4901:1985

NOW

PUBLISHED
ISO 4901:2011
90.20 Standard under periodical review
Jul 15, 2026