This International Standard specifies a method of determining the total active-oxygen content of organic peresters.
It applies to those peresters used to initiate crosslinking of unsaturated-polyester thermosets.
The peresters most widely used in the crosslinking of unsaturated-polyester resins are given in Table 1.
| Table 1 - Main types of organic perester | |
|---|---|
| Perester | Molecular mass |
| tert-Butyl perbenzoate | 194,2 |
| tert-Butyl 2-ethylperhexanoate | 216,3 |
| iso-Propyl tert-butylperoxy carbonate | 176,2 |
| tert-Amyl 2-ethylperhexanoate | 230,3 |
| tert-Amyl perbenzoate | 208,3 |
| tert-Butyl 3,5,5-trimethylperhexanoate | 230,4 |
Butyl peresters may contain traces of tert-butyl hydroperoxide (TBHP), the active oxygen in which can be determined separately from that in the perester itself (see annex A). The active-oxygen content of the perester alone can then be obtained by subtraction.
| SDO | ISO: International Organization for Standardization |
| Document Number | ISO 15038 |
| Publication Date | Not Available |
| Language | en - English |
| Page Count | |
| Revision Level | |
| Supercedes | |
| Committee | ISO TC 61/SC 12/WG 5 |