Reference number
ISO 182-1:1990
ISO 182-1:1990
© ISO 2024
International Standard
ISO 182-1:1990
Plastics — Determination of the tendency of compounds and products based on vinyl chloride homopolymers and copolymers to evolve hydrogen chloride and any other acidic products at elevated temperatures — Part 1: Congo red method
Edition 1
1990-12
1990-12
ISO 182-1:1990
4024
Publicado
(Edición 1, 1990)
Esta publicación se revisó y confirmó por última vez en 2020.
Por lo tanto, esta versión es la actual.
Resumen
Intended primarily as a simple and rapid quality-control test during the manufacture and conversion of PVC compounds. Suitable for coloured compounds. Is not recommended for compounds in the form of dry blends. The determination is carried out on a sample of the PVC compound which is maintained at an agreed temperature in still air until the colour of a Congo red paper held above it changes from red to blue. If universal indicator paper is used, the colour change is that corresponding to pH 3. The time required for the colour change is taken to be the stability time, ts. Together with ISO 182-2, replaces and cancels ISO Recommendation R 182:1970.
Informaciones generales
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Estado: PublicadoFecha de publicación: 1990-12Etapa: Norma Internacional confirmada [90.93]
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Edición: 1Número de páginas: 4
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Comité Técnico :ISO/TC 61/SC 9ICS :83.080.20
- RSS actualizaciones
Ciclo de vida
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Anteriormente
RetiradaISO/R 182:1970
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Ahora