United Initiators DHBP 2,5-Dimethyl-2,5-di(tert.butylperoxy)hexane 78-63-7

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Product Information

Name: DHBP (2,5-dimethyl-2,5-bis(tert-butylperoxy)pentane)
Chemical formula: CAS#78-63-7
Form: Liquid, Industrial Purity
Molecular weight: 290.4 g/mol

Product Description

Appearance: Colorless liquid
Purity: approx. 94% w/w
Active Oxygen Content: Approx. 10.4% w/w
Desensitizer: None
Density (20°C): approx. 0.87 g/cm³
Viscosity at 20°C: approx. 7 mPa.s
Refractive index at 20°C: approx. 1.422
Color index (Hazen): approx. 50-80
Solubility: insoluble in water, soluble in alcohols and esters
Vapor pressure (50/80/110°C): 8/27/95 mbar
SADT: approx. 90°C
Refrigeration stability: freezing point below 10°C
Recommended storage temperature: 10 to 40°C
Shelf life: 12 months from date of delivery
Complies with the European E-waste Directive (RoHS 2002/95/EG, WEEE 2002/96/EG).

Application Areas

Free radical initiators for polymer crosslinking
Free radical initiators for controlling polypropylene rheology
Temperature range: 200-220°C
Dosage: 0.01-0.1% w/w, depending on product supplied, based on polymer

Features and Benefits

Promotes degradation of polypropylene molecular weights for easier (re)processing
Controlling the melt flow of polypropylene and improving its melt index
Crosslinking of a wide range of polymers and elastomers, including polyethylene, ethylene/vinyl acetate copolymers, ethylene/propylene/(diene) rubbers, silicone rubbers, and fluoroelastomers
No premature cross-linking at low temperatures (burns)
Suitable for a wide range of package sizes

statement denying or limiting responsibility

Information and technology recommendations are based on in-house testing and local raw materials, reflecting current knowledge and experience
No warranty is made as to the specific nature of the product or its suitability for a particular application, nor are complete instructions for use provided
Does not guarantee the product and the nature of the shelf life, and does not assume any legal responsibility for the use of the product
The use and application of the product is based on the user's own risk and responsibility
Users need to scrutinize and test incoming products to verify that they are suitable for the intended application

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