International Standard
ISO 7327:1994
Plastics — Hardeners and accelerators for epoxide resins — Determination of free acid in acid anhydride
Reference number
ISO 7327:1994
ISO 7327:1994
Edition 1
1994-07
1994-07
© ISO 2024
International Standard
p
ISO 7327:1994
14003
Published
(Edition 1, 1994)
This standard was last reviewed and confirmed in 2020.
Therefore this version remains current.
Abstract
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.
General information
-
Status: PublishedPublication date: 1994-07Stage: International Standard confirmed [90.93]
-
Edition: 1Number of pages: 3
-
Technical Committee :ISO/TC 61/SC 12ICS :83.080.10
- RSS updates
Life cycle
Got a question?
Check out our FAQs
Customer care
+41 22 749 08 88
Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)