- Product Name: DYBP-85-WO
- Chemical Name: 2,5-Dimethyl-2,5-di-tert-butyl-3-hexyn-1-peroxide
- CAS Number: 1068-27-5
- Appearance: Pale yellow liquid
- Contains approximately 85% technically pure 2,5-dimethyl-2,5-di-tert-butyl hexyn-3 peroxide, with 15% white oil added to reduce sensitivity.
- This bifunctional dialkyl peroxide is used as a free-radical initiator in the cross-linking of polyethylene at temperatures above 180°C.
- Appearance: Pale yellow liquid
- Desensitizer: White oil
- Content: Approximately 85% w/w
- Density (20°C): approx. 0.88 g/cm³
- Viscosity (20°C): approx. 11 mPa·s
- Refractive index (20°C): approx. 1.436
- Flash point: approx. 69°C
- Critical temperature (SADT): approx. 90°C
- Refrigeration stability: Freezing point below 0°C
- Recommended storage temperature: not exceeding 40°C
- Storage stability from date of delivery: 12 months
- Used as a crosslinking agent for polyethylene (HDPE, LLDPE, and carbon black-containing LDPE).
- Crosslinking temperature: 180°C or higher; avoid premature crosslinking (sintering) at temperatures below 150°C.
- Dosage: 0.2–2% (weight/weight) of the supplied product.
- Decomposition products that may be detected: tert-butyl alcohol, acetone, methane, 3-hexyn-2,5-dione.
- Avoid heat sources, light, and humidity, and protect the product from contaminants. Keep within the safe temperature range.
- 15 kg (33.1 lb) / 20 kg (44.1 lb) HDPE drums.
- The level of peroxide affects the degree of cross-linking.