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sklademVydáno: 1999-09-15
BS ISO 15038:1999
Plastics. Organic-perester crosslinking agents for unsaturated-polyester thermosetting materials. Determination of active-oxygen content
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Označení normy: | BS ISO 15038:1999 |
Počet stran: | 12 |
Vydáno: | 1999-09-15 |
ISBN: | 0 580 32892 9 |
Status: | Standard |
Popis
BS ISO 15038:1999
This standard BS ISO 15038:1999 Plastics. Organic-perester crosslinking agents for unsaturated-polyester thermosetting materials. Determination of active-oxygen content is classified in these ICS categories:
- 83.040.30 Auxiliary materials and additives for plastics
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.